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STOD03A
Dual DC-DC converter for powering AMOLED displays
Features

Step-up and inverter converters Operating input voltage range from 2.3 V to 4.5 V Synchronous rectification for both DC-DC converters 200 mA output current 4.6 V fixed positive output voltages Programmable negative voltage by SWIRE from - 2.4 V to - 5.4 V Typical efficiency: 85 % Pulse skipping mode in light load condition 1.5 MHz PWM mode control switching frequency Enable pin for shutdown mode Low quiescent current: < 1 A in shutdown mode Soft-start with inrush current protection Overtemperature protection Temperature range: - 40 C to 85 C True shutdown mode Fast discharge outputs of the circuits after shutdown Package DFN (3 x 3) 12 leads 0.6 mm height
DFN12L (3 x 3 mm)
Description
The STOD03A is a dual DC-DC converter for AMOLED display panels. It integrates a step-up and an inverting DC-DC converter making it particularly suitable for battery operated products, in which the major concern is overall system efficiency. It works in pulse skipping mode during low load conditions and PWM-MODE at 1.5 MHz frequency for medium/high load conditions. The high frequency allows the value and size of external components to be reduced. The enable pin allows the device to be turned off, therefore reducing the current consumption to less that 1 A. The negative output voltage can be programmed by an MCU through a dedicated pin which implements single-wire protocol. Soft-start with controlled inrush current limit and thermal shutdown are integrated functions of the device.
Applications

Active matrix AMOLED power supply Cellular phones Camcorders and digital still cameras Multimedia players Device summary
Positive voltage 4.6 V Negative voltage - 2.4 V to - 5.4 V Package DFN12L (3 x 3 mm) Packaging 3000 parts per reel
Table 1.
Order code STOD03ATPUR
September 2010
Doc ID 17785 Rev 1
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www.st.com 24
Contents
STOD03A
Contents
1 2 3 4 5 6 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.1 6.2 SWIRE protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Negative output voltage levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1 External passive components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1.1 7.1.2 Inductor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2
Recommended PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8
Detailed description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1.1 8.1.2 8.1.3 8.1.4 8.1.5 8.1.6 Multiple mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Soft-start and inrush current limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Undervoltage lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Fast discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9 10
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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STOD03A
Schematic
1
Figure 1.
Schematic
Application schematic
VBAT L1
CIN VINP VINA SWIRE LX1 VMID CMID
S-Wire
STOD03A
VO2 EN VREF CO2 PGND AGND LX2 L2
EN
CREF
Table 2.
Component L1 L2(1) CIN CMID CO2 CREF
1.
Typical external components
Manufacturer ABCO ABCO TDK Murata Murata Murata Murata Part Number LPF2807T-4R7M LPF3509T-4R7M VLF4014AT-4R7M1R1 GRM21BR61E475KA12 GRM21BR61E475KA12 GRM21BR61E475KA12 GRM155R60J105KE19 Value 4.7 H 4.7 H 4.7 H 4.7 F 4.7 F 4.7 F 1 F Size 2.8 x 2.8 x 0.7 mm 3.5 x 3.5 x 1.0 mm 3.7 x 3.5 x 1.4 mm 0805 0805 0805 0402
From - 5.0 V to - 5.4 V, 200 mA load can be provided with inductor saturation current as a minimum of 1 A.
Note:
All the above components refer to the typical application performance characteristics. Operation of the device is not limited to the choice of these external components. Inductor values ranging from 2.2 H to 6.8 H can be used together with STOD03A. See 7.1.1 for peak inductor current calculation.
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Schematic Figure 2. Block schematic
VINP LX1
STOD03A
DMD
VINA
UVLO
RING KILLER
VMID
P1A P1B
N1
STEP-UP CONTROL
LOGIC CONTROL
EN S WIRE
OTP S-WIRE
FAST DISCHARGE
OSC DMD VINP
VO2
N2
S-wire control
P2
VREF
VREF
INVERTING
AGND PGND
CONTROL VREF FAST DISCHARGE
LX2
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STOD03A
Pin configuration
2
Figure 3.
Pin configuration
Pin configuration (top view)
Table 3.
Pin name Lx1 PGND VMID NC AGND VREF SWIRE EN VO2 Lx2 VIN A ViN P
Pin description
Pin number 1 2 3 4 5 6 7 8 9 10 11 12 Exposed pad Description Switching node of the step-up converter Power ground pin Step-up converter output voltage (4.6 V) Not internally connected Signal ground pin. This pin must be connected to power ground pin Voltage reference output. 1 F bypass capacitor must be connected between this pin and AGND Negative voltage setting pin. Uses SWIRE protocol, see details in SWIRE protocol Enable control pin. ON = VINA. When pulled low it puts the device in shutdown mode Inverting converter output voltage (Default - 4.9 V). Switching node of the inverting converter Analogic input supply voltage Power input supply voltage Internally connected to AGND. Exposed pad must be connected to AGND and PGND in the PCB layout in order to guarantee proper operation of the device
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Maximum ratings
STOD03A
3
Table 4.
Symbol VINA, VINP EN, SWIRE ILX2 LX2 VO2 VMID LX1 ILX1 VREF PD TSTG TJ ESD
Maximum ratings
Absolute maximum ratings
Parameter DC supply voltage Logic input pins Inverting converter switching current Inverting converter switching node voltage Inverting converter output voltage Step-up converter and output voltage Step-up converter switching node voltage Step-up converter switching current Reference voltage Power dissipation Storage temperature range Maximum junction temperature ESD protection HBM Value -0.3 to 6 -0.3 to 6 Internally limited -10 to VINP+0.3 -10 to AGND+0.3 -0.3 to 6 -0.3 to VMID+0.3 Internally limited -0.3 to 3 Internally limited -65 to 150 150 2 Unit V V A V V V V A V mW C C kV
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Thermal data
Parameter Thermal resistance junction-ambient referred to FR-4 PCB Thermal resistance junction-case Value 49.1 4.216 Unit C/W C/W
Table 5.
Symbol RthJA RthJC
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STOD03A
Electrical characteristics
4
Electrical characteristics
TJ = 25 C, VINA = VINP = 3.7 V, IMID,O2 = 30 mA, CIN = 4.7 F, CMID,O2 = 4.7 F, CREF = 1 F, L1 = 4.7 H, L2 = 4.7 H, VEN = VINA = VINP, VMID = 4.6 V, VO2= -4.9 V unless otherwise specified.
Table 6.
Symbol
Electrical characteristics
Parameter Test conditions Min. Typ. Max Unit
General Section VINA, VINP UVLO_H UVLO_L I_VI IQ_SH VEN H VEN L IEN fS D1MAX D2MAX Supply input voltage Undervoltage lockout HIGH Undervoltage lockout LOW Input current Shutdown current Enable high threshold Enable low threshold Enable input current Switching frequency Step-up maximum duty cycle VINA rising VINA falling No load condition (Sum of VINA and VINP) VEN =GND (Sum of VINA and VINP); TJ = -40 C to +85 C; VINA=2.3 V to 4.5 V, TJ = -40 C to +85 C; VEN=VINA=4.5 V; TJ = -40 C to +85 C; PWM Mode No load 1.2 1.5 87 87 80 85 1.208 100 1.220 1.232 1.2 V 0.4 1 1.7 A MHz % % % % V A 1.9 2.3 2.22 2.18 1.3 1.7 1 4.5 2.25 V V V mA A
Inverting maximum duty cycle No load IMID,O2=10 to 30 mA, VMID=4.6 V VO2=-4.9 V IMID,O2=30 to 150 mA, VMID=4.6 V, VO2=-4.9 V Voltage reference Voltage reference current capability IREF=10 A At 98.5 % of no load reference voltage
Total system efficiency
VREF IREF
Step-up converter section VINA=VINP=2.5 V to 4.5 V; Positive voltage total variation IMID=5 mA to 150 mA, IO2 no load, TJ = -40 C to +85 C Temperature accuracy VINA=VINP=3.7 V; IMID=5 mA; IO2 no load; TJ = -40 C to +85 C VINA,P=3.5 V to 3.0 V, IMID=100mA; TR=TF=50s 4.55 4.6 4.65 V
VMID
0.5
%
VMID LT
Line transient
-12
mV
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Electrical characteristics Table 6.
Symbol
STOD03A
Electrical characteristics (continued)
Parameter Test conditions IMID=3 to 30 mA and IMID=30 to 3 mA, TR=TF=30 s Min. Typ. 20 Max Unit mV
VMIDT
Load transient regulation
IMID=10 to 100 mA and IMID=100 to 10 mA, TR=TF=30 s IMID=5 to 100 mA; VINA,P =2.9 V to 3.4 V; F=200Hz; TR=TF=50 s; IO2 no load VINA,P=2.9 V to 4.5 V VMID 10 % below nominal value -200 0.9
25
mV
VMID-PP IMID MAX I-L1MAX RDSONP1 RDSONN1
TDMA noise line transient regulation Max step-up load current Step-up inductor peak current
20
mV mA 1.1 A
1.0 0.4
2.0 1.0
Inverting converter section 31 different values set by Output negative voltage range SWIRE pin (see SWIRE protocol) Output negative voltage total variation on default value VINA=VINP=2.5 V to 4.5 V; TJ = -40 C to +85 C; IO2=5 mA to 150 mA, IMID no load VINA=VINP=3.7 V; TJ = -40 C to +85 C; IO2=5 mA, IMID no load VINA,P=3.5 V to 3.0 V, IO2=100 mA, TR=TF=50 s IO2=3 to 30 mA and IO2=30 to 3 mA, TR=TF=100 s IO2=10 to 100 mA and IO2=100 to 10 mA, TR=TF=100 s IO2=5 to 100 mA; VINA,P =2.9 V to 3.4 V; F=200Hz; TR=TF=50 s; IMID no load VINA,P=2.9 V to 4.5 V VO2 below 10 % of nominal value -200 -1.2 0.42 0.43 -0.9 -5.4 -2.4 V
VO2
-4.97
-4.9
-4.83
V
Temperature accuracy
0.5
%
VO2 LT
Line transient Load transient regulation
+12 20
mV mV
VO2T
Load transient regulation
25
mV
VO2-PP
TDMA noise line transient regulation Maximum inverting output current Inverting peak current
25
mV
IO2 I-L2MAX RDSONP2 RDSONN2
mA A
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STOD03A Table 6.
Symbol Thermal shutdown OTP OTPHYST Overtemperature protection Overtemperature protection hysteresis
Electrical characteristics Electrical characteristics (continued)
Parameter Test conditions Min. Typ. Max Unit
140 15
C C
Discharge resistor RDIS TDIS Resistor value Discharge time No load, VMID-VO2 at 10 % of nominal value 400 8 ms
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Typical performance characteristics
STOD03A
5
Typical performance characteristics
VO2 = - 4.9 V; TA = 25 C; See Table 1 for external components used in the tests below.
Figure 4.
90% 88% 86% 84%
Efficiency vs. input voltage
Figure 5.
90% 85% 80% Efficiency [%] 75% 70% 65% 60% 55% 50%
Efficiency vs. output current
Efficiency [%]
82% 80% 78% 76% 74% 72% 70% 68% 66% 2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
Io=50mA Io=100mA Io=150mA Io=200mA
VIN=2.7V VIN=3.2V VIN=3.7V VIN=4.2V
0
20
40 60
80 100 120 140 160 180 200 IOUT [mA]
VIN [V]
Figure 6.
10.00 9.00 8.00 7.00 Iq [mA] 6.00 5.00 4.00 3.00 2.00 1.00 0.00
Quiescent current vs. VIN no load
Figure 7.
500 450 400
Max power output vs. VIN
4.0 3.5 3.0 2.5 2.0 1.5
max IOUT at VO2 = -4.9V max POUT
IOUT [mA]
-40C 25C 85C
350 300 250 200 150 100
1.0 0.5 0.0
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 VIN [V]
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5
VIN [V]
Figure 8.
Fast discharge VIN = 3.7 V, no load
Figure 9.
Startup and inrush VIN = 3.7 V, no load
EN VMID VO2 IIN
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POUT [W]
STOD03A Figure 10. Step-up CCM operation
Typical performance characteristics Figure 11. Inverting CCM operation
VEN = VINA = VINP = 3.7 V, IMID = 100 mA, TA = 25 C
VEN = VINA = VINP = 3.7 V, IO2 = 100 mA, TA = 25 C
Figure 12. Line transient
Figure 13. Output voltage vs. input voltage IMID,O2 = 200 mA, VO2 = - 4.9 V
10.00 9.00 -40 C 25 C 7.00 85 C VO1+VO2 [V] 6.00 5.00 4.00 3.00
VIN VMID
8.00
VO2
2.00 1.00 0.00 1.6 1.8 2 2.2 2.4 2.6 2.8 3
VINA = VINP = 2.9 to 3.4 V, IMID,O2 = 100 mA, TR = TF = 50 s
VIN [V]
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Detailed description
STOD03A
6
6.1
Detailed description
SWIRE protocol
Figure 14. SWIRE timing waveform
EN
SWIRE
VO2 default
|VO2|
Ten_dly
Toff_dly1
Tih
Twait
Tsh
Toff_dly2 Tstop Tsl Tvo_off_dly2
Tss1
Tvo_off_dly1
Tss2
Table 7.
SWIRE timing (1)
Rating Symbol Ten_dly Tss1 Toff_dly1 Tvo_off_dly1 Tih Tss2 Tsh TsL Tstop Tvo_off_dly2 Twait Toff_dly2 2 2 300 12 1 50 300 Min. Typ. 300 2 50 12 300 2 10 10 20 20 Max. Unit s ms s ms s ms s s s ms s s s
Enable high delay time Soft-start delay Turn-off delay VOUT turn-off delay SWIRE initial time Soft-start time by SWIRE enable SWIRE High SWIRE Low SWIRE signal stop indicate time VOUT turn-off delay by SWIRE TWAIT after data SWIRE turn-off detection time SWIRE store data delay
1. SWIRE internal signal is filtered by a low pass filter with a cut-off frequency of 1 MHz typical.
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Detailed description
Figure 15. SWIRE level waveform
TON TWK VIH VIL
90%
TOFF
Tf
Tr
10%
BIT= 1
BIT= 0
BIT= 0
Table 8.
SWIRE levels
Rating Symbol VIH VIL RSWIRE TWK Tr Tf TON TOFF FSWIRE 1 250 Min. 1.2 0 150 1 200 200 75 Typ. Max. VBAT 0.6 Unit V V k s ns ns s s kHz
Rising input high threshold voltage level Falling input high threshold voltage level Pull-down resistor Wake up delay SWIRE rising time SWIRE falling time Clocked SWIRE high SWIRE low Input SWIRE frequency
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Detailed description
STOD03A
6.2
Table 9.
Negative output voltage levels
Negative output voltage levels
VO2 -5.4 -5.3 -5.2 -5.1 -5.0 -4.9 -4.8 -4.7 -4.6 -4.5 Pulse 11 12 13 14 15 16 17 18 19 20 VO2 -4.4 -4.3 -4.2 -4.1 -4.0 -3.9 -3.8 -3.7 -3.6 -3.5 Pulse 21 22 23 24 25 26 27 28 29 30 31 VO2 -3.4 -3.3 -3.2 -3.1 -3.0 -2.9 -2.8 -2.7 -2.6 -2.5 -2.4 Pulse 1 2 3 4 5 6 (1) 7 8 9 10
1. Default output voltage
Figure 16. SWIRE programming
S-wire 1 2 3 n-1 n
Tstop
Table 10.
Enable and SWIRE operation table (1)
Enable Low Low High High SWIRE Low High Low High Action Device off Negative output set by SWIRE Default negative output voltage Default negative output voltage
1. Enable pin must be set to AGND while using SWIRE function
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STOD03A
Application information
7
7.1
7.1.1
Application information
External passive components
Inductor selection
The inductor is the key passive component for switching converters. For the step-up converter an inductance between 4.7 H and 6.8 H is recommended. For the inverting stage the suggested inductance ranges from 2.2 H to 4.7 H. It is very important to select the right inductor according to the maximum current the inductor can handle to avoid saturation. The step-up and the inverting peak current can be calculated as follows: Equation 1
IPEAK -BOOST =
VMID x IOUT VINMIN x (VMID - VINMIN ) + 1x VINMIN 2 x VMID x fs x L1
Equation 2
I PEAK - INVERTING =
Where
(VINMIN - VO2MIN ) x I OUT VINMIN x VO 2 MIN + 2 x VINMIN 2 x (VO 2MIN - VINMIN ) x fs xL2
VMID: step-up output voltage, fixed at 4.6 V; VO2: inverting output voltage including sign; (minimum value is the absolute maximum value) IO: output current for both DC-DC converters; VIN: input voltage of STOD03A; fs: switching frequency. Use the minimum value of 1.2 MHz for worst case; 1: efficiency of step-up converter. Typical value is 0.85; 2: efficiency of inverting converter. Typical value is 0.75; The negative output voltage can be set via S-Wire at - 5.4 V. Accordingly, the inductor peak current, at the maximum load condition, increases. A proper inductor, with a saturation current as a minimum of 1 A, is preferred.
7.1.2
Input and output capacitor selection
It is recommended to use ceramic capacitors with low ESR as input and output capacitors in order to filter any disturbance present in the input line and to obtain stable operation for the two switching converters. A minimum real capacitance value of 2 F must be guaranteed for CMID and CO2 in all conditions. Considering tolerance, temperature variation, and DC polarization, a 4.7 F 10 V capacitor can be used to achieve the required 2 F.
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Application information
STOD03A
7.2
Recommended PCB layout
The STOD03A is a high frequency power switching device so it requires a proper PCB layout in order to obtain the necessary stability and optimize line/load regulation and output voltage ripple. Analog input (VINA) and power input (VINP) must be kept separated and connected together at the CIN pad only. The input capacitor must be as close as possible to the IC. In order to minimize ground noise, a common ground node for power ground and a different one for analog ground must be used. In the recommended layout, the AGND node is placed close to CREF ground while the PGND node is centered at CIN ground. They are connected by a separated layer routing on the bottom through vias. The exposed pad is connected to AGND through vias.
Figure 17. Top layer and top silkscreen top
Figure 18. Bottom layer and silkscreen top
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STOD03A
Detailed description
8
8.1
Detailed description
General description
The STOD03A is a high efficiency dual DC-DC converter which integrates a step-up and inverting power stage suitable for supplying AMOLED panels. Thanks to the high level of integration it needs only 6 external components to operate and it achieves very high efficiency using a synchronous rectification technique for each of the two DC-DC converters. The controller uses an average current mode technique in order to obtain good stability and precise voltage regulation in all possible conditions of input voltage, output voltage, and output current. In addition, the peak inductor current is monitored in order to avoid saturation of the coils. The STOD03A implements a power saving technique in order to maintain high efficiency at very light load and it switches to PWM operation as the load increases, in order to guarantee the best dynamic performance and low noise operation. The STOD03A avoids battery leakage thanks to the true-shutdown feature and it is self protected from overtemperature. Undervoltage lockout and soft-start guarantee proper operation during startup.
8.1.1
Multiple mode of operation
Both the step-up and the inverting stage of the STOD03A operate in three different modes: pulse skipping (PS), discontinuous conduction mode (DCM), and continuous conduction mode (CCM). It switches automatically between the three modes according to input voltage, output current, and output voltage conditions.
Pulse skipping operation:
The STOD03A works in pulse skipping mode when the load current is below some tens of mA. The load current level at which this way of operating occurs depends on input voltage only for the step-up converter and on input voltage and negative output voltage (VO2) for the inverting converter.
Discontinuous conduction mode:
When the load increases above some tens of mA the STOD03A enters DCM operation. In order to obtain this type of operation the controller must avoid the inductor current going negative. The discontinuous mode detector (DMD) blocks sense the voltage across the synchronous rectifiers (P1B for the step-up and N2 for the inverting) and turn off the switches when the voltage crosses a defined threshold which, in turn, represents a certain current in the inductor. This current can vary according to the slope of the inductor current which depends on input voltage, inductance value, and output voltage.
Continuous conduction mode:
At medium/high output loads the STOD03A enters full CCM at constant switching frequency mode for each of the two DC-DC converters.
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Detailed description
STOD03A
8.1.2
Enable pin
The device operates when the EN pin is set high. If the EN pin is set low, the device stops switching, and all the internal blocks are turned off. In this condition the current drawn from VINP/VINA is below 1 A in the whole temperature range. In addition, the internal switches are in an Off state so the load is electrically disconnected from the input, this avoids unwanted current leakage from the input to the load. When the EN is pulled high, the P1B switch is turned on for 100 s. In normal operation, during this time, apart from a small drop due to parasitic resistance, VMID reaches VIN. If, after this 100 s, VMID stays below VIN, the P1B is turned off and stays off until a new pulse is applied to the EN. This mechanism avoids STOD03A starting if a short circuit is present on VMID.
8.1.3
Soft-start and inrush current limiting
After the EN pin is pulled high, or after a suitable voltage is applied to VINP, VINA, and EN the device initiates the startup phase. As a first step, the CMID capacitor is charged and the P1B switch implements a current limiting technique in order to keep the charge current below 400 mA. This avoids the battery overloading during startup. After VMID reaches VINP voltage level the P1B switch is fully turned on and the soft-start procedure for the step-up is started. After about 2 ms the soft-start for the inverting is started. The positive and negative voltage is under regulation by around 6 ms after the EN pin is asserted high.
8.1.4
Undervoltage lockout
The undervoltage lockout function avoids improper operation of STOD03A when the input voltage is not high enough. When the input voltage is below the UVLO threshold the device is in shutdown mode. The hysteresis of 50 mV avoids unstable operation when the input voltage is close to the UVLO threshold.
8.1.5
Overtemperature protection
An internal temperature sensor continuously monitors the IC junction temperature. If the IC temperature exceeds 140 C typically the device stops operating. As soon as the temperature falls below 125 C typically normal operation is restored.
8.1.6
Fast discharge
When ENABLE turns from high to low level, the device goes into shutdown mode and LX1 and LX2 stop switching. Then discharge switch between VMID and VIN and switch between VO2 and GND turn on and discharge the positive output voltage and negative output voltage. When the output voltages are discharged to 0 V, the switches turn off and the outputs are high impedance.
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STOD03A
Package mechanical data
9
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions, and product status are available at: www.st.com. ECOPACK is an ST registered trademark.
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Package mechanical data
STOD03A
DFN12L (3 x 3 x 0.6 mm) mechanical data
mm. Dim. Min. A A1 A3 b D D2 E E2 e L 0.30 0.18 2.85 1.87 2.85 1.06 0.51 0 Typ. 0.55 0.02 0.20 0.25 3 2.02 3 1.21 0.45 0.40 0.50 0.012 0.30 3.15 2.12 3.15 1.31 0.007 0.112 0.074 0.112 0.042 Max. 0.60 0.05 Min. 0.020 0 Typ. 0.022 0.001 0.008 0.010 0.118 0.080 0.118 0.048 0.018 0.016 0.020 0.012 0.124 0.083 0.124 0.052 Max. 0.024 0.002 inch.
8085116/A
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STOD03A
Package mechanical data
Tape & reel QFNxx/DFNxx (3x3) mechanical data
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 3.3 3.3 1.1 4 8 12.8 20.2 99 101 14.4 0.130 0.130 0.043 0.157 0.315 TYP MAX. 330 13.2 0.504 0.795 3.898 3.976 0.567 MIN. TYP. MAX. 12.992 0.519 inch
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Package mechanical data
STOD03A
Figure 19. DFN12L (3 x 3 mm) footprint recommended data
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Doc ID 17785 Rev 1
STOD03A
Revision history
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Table 11.
Date
Revision history
Document revision history
Revision 1 Initial release. Changes
08-Sep-2010
Doc ID 17785 Rev 1
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STOD03A
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