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PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
DESCRIPTION The LX8213 LDO regulator is part of Microsemi's family of positive voltage regulator ICs using CMOS technology. The device provides a compact and cost effective solution featuring low power consumption over a wide supply voltage range, high output voltage accuracy, low dropout, excellent line and load regulation, fast transient response, and low noise. The LX8213 operates over a wide input voltage range of 2.5V to 6V, and consumes only 60uA typical quiescent current at no load and a low 0.1uA shutdown current. Output voltage options include fixed 1.2V, 3.3V, or an adjustable output voltage which may be set from 1.2V to 5.5V. The LDO delivers up to 300mA of output current, with a foldback current limit of approximately 400mA. At 300mA load, dropout voltage measures only 170mV for a 3.3V output. Tight load and line regulation is achieved over the full output current and supply range. The high bandwidth control loop provides fast transient response to reduce output voltage deviation using low cost external ceramic capacitors in the 1uF range. The LX8213 also exhibits low output noise with only 60uVRMS over a 100kHz bandwidth. Power supply rejection exceeds 65dB at 100Hz. Other features of LX8213 include an active low shutdown input with a 3M internal pull-down for low cost power sequencing, internal soft-start circuitry to prevent inrush current, short circuit current limit, and thermal overload protection. The LX8213 operates over -40C to +85C ambient temperature range and is available in a tiny 5 pin SOT-23 ROHS compliant package.
KEY FEATURES 2.5V to 6V Wide Input Voltage Range Fixed Output at 1.2V or 3.3V Adjustable Output Voltage Range from 1.2V to 5.5V Low Quiescent Current of Typical 60uA Low Dropout Voltage of Typical 170mV at 3.3V 300mA Stable with Low ESR 1uF Input/Output Bypass Ceramic Capacitors Ultra Low Shutdown Current of Typical 0.1uA Low Output Noise of Typical 60uVRMS at VOUT=1.2V Fast Transient Response Shutdown Control Input Foldback Current Limit 50mA Short Circuit Limit Over Temperature Protection Standard Package SOT-23 RoHS Compliant APPLICATIONS Battery Operated Systems Set-Top Box LCD TV's Routers Video Cards Hand Held Instruments
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PACKAGE ORDER INFO
THERMAL DATA
SE
TA (C)
Plastic SOT-23
RoHS Compliant / Pb-free
5-pin
JA = 250 C/W
THERMAL RESISTANCEJUNCTION TO AMBIENT
LX8213-00ISE (Adjustable) Marking "ADYWL" LX8213-12ISE (1.2V Fixed Output) Marking "AKYWL" LX8213-33ISE (3.3V Fixed Output) Marking "ALYWL"
*Marking explanation: A D
-40 to +85
Output Reference. `AD' - Adjustable Output `AK' - 1.2V Fixed Output `AL' - 3.3V Fixed Output
Y
W
L
`L' Numerical single digit sub-build lot identity. (`0', `1', `2',....'9')
Junction Temperature Calculation: TJ = TA + (PD x JA). The JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
LX8213 LX8213
`Y' Numerical single digit year reference. (`0', `1', `2'....'9')
`W' Bi-weekly code. (`A' for 1st-2nd week,.......,'Z' for 51th52th week)
Note: Available in Tape & Reel. Append the letters "TR" to the part number. (i.e. LX8213-xxISE-TR)
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
AABSOLUTE MAXIMUM RATINGS
PACKAGE PIN OUT
VIN.................................................................................................-0.3V to 6.5V SHDN Input......................................................................... -0.3V to VIN + 0.3V Output Current........................................................................................ 450mA Junction Temperature...............................................................................150C Storage Temperature Range..................................................... -65C to 150C Peak Package Solder Reflow Temp. (40 seconds maximum exposure) .260C Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to ground. Currents are positive into and negative out of the specified terminal.
SHDN GND VIN
1 2 3
5
FB/NC
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4
VOUT
SE PACKAGE
(Top View) RoHS / Pb-free 100% Matte Tin Pin Finish
Name
Pin # 1
Description Active Low Shutdown Input. Connect to VIN or a logic level high to enable the device. An internal 3M pull-down resistor disables the device when the SHDN pin is floating. Ground. Connect to the local analog ground or to the circuit board ground plane to maximize thermal dissipation. Bypass the input and output capacitors to this plane. Regulator Input. Operating voltage range is from 2.5V to 6V. Bypass VIN to GND with a 1uF capacitor. Regulator Output. Bypass to GND with a 1uF capacitor. Feedback Input. For the adjustable output version (LX8213-00), the device output voltage can be set from 1.2V to 5.5V by connecting FB to the center of a resistive voltage divider from VOUT to GND. Note that FB regulates to 0.8V.
SHDN
GND VIN VOUT FB (Adjustable Output Version) N.C. (Fixed Output Version)
2 3 4
5
5
No Connect. For fixed output versions, pin 5 is a no connect.
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
LX8213-00ISE (Adjustable Output). Unless otherwise specified, the following specifications apply over the operating temperature of -40C TA
ELECTRICAL CHARACTERISTICS
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85C with the following test conditions: VIN=(VOUT+1), VINMIN=2.5V, SHDN = HIGH, CIN=1F, COUT=1F LX8213-00 Typ Max
Parameter LX8213-00ISE (ADJUSTABLE OUTPUT) Reference Voltage Input Voltage Maximum Output Current Load Regulation Line Regulation Dropout Voltage Quiescent Current Shutdown Current Power Supply Rejection Ratio Output Voltage Temperature Coefficient Short Current Limit Soft Start Time RMS Output Noise Shutdown "High" Logic Threshold (Device Enabled) Shutdown "Low" Logic Threshold (Device Disabled) VOUT Discharge Internal MOSFET RDS(ON) Shutdown Internal Pull Down Resistance Thermal Shutdown Thermal Shutdown Hysteresis
Symbol
Test Conditions
Min
Units
VREF VIN IOUT(MAX) VOUT / VOUT VOUT / VOUT VDROP IQ ISHDN PSRR (VOUT/VOUT) /T ISHORT tUP VNOISE
2.5V VIN 6V
0.784 2.5 300
0.8
0.816 6
V V mA
400 0.7 0.2 170 60 0.1 300 90 1.0
1mA IOUT 300mA (VOUT+0.5V) VIN 6V, VINMIN=2.5V, IOUT=30mA VOUT=3.3V, IOUT=300mA, VOUT=-1% IOUT=0mA
% % mV uA uA dB ppm/C mA uS uVRMS
SHDN = LOW
Ripple 1Vpp, VIN=3V f=100Hz f=1kHz f=10kHz
68 68 54 100 50 50
IOUT=30mA, -40C TA 85C VOUT=0V
TA=25C, 10Hz f 100kHz, VOUT=1.2V 1.5 0
60 6 0.4 60 3 165 30
V V M C C
SHDN = LOW
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
ELECTRICAL CHARACTERISTICS
LX8213-12ISE/-33ISE (Fixed Output). Unless otherwise specified, the following specifications apply over the operating temperature of -40C TA 85C with the following test conditions: VIN=2.5V for VOUT=1.2V, VIN=(VOUT+1V) for VOUT=3.3V, SHDN = HIGH, CIN=1F, COUT=1F
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Parameter
Symbol
Test Conditions
Min
LX8213-12/33 Typ Max
Units
LX8213-12ISE (1.2V), LX8213-33ISE (3.3V) (FIXED OUTPUT) Output Voltage Input Voltage Maximum Output Current Load Regulation Line Regulation Dropout Voltage Quiescent Current Shutdown Current Power Supply Rejection Ratio Output Voltage Temperature Coefficient Short Current Limit Soft Start Time Shutdown "High" Logic Threshold (Device Enabled) Shutdown "Low" Logic Threshold (Device Disabled) VOUT Discharge Internal MOSFET RDS(ON) Shutdown Internal Pull Down Resistance Thermal Shutdown Thermal Shutdown Hysteresis VOUT VIN IOUT(MAX) VOUT / VOUT VOUT / VOUT VDROP IQ ISHDN PSRR (VOUT/VOUT) /T ISHORT tUP 1.5 0
SHDN = LOW
1mA IOUT 300mA
98%* VOUT 2.5 300 400
102%* VOUT 6
V V mA
1mA IOUT 300mA 2.5V VIN 6V for VOUT=1.2V, (VOUT+0.5V) VIN 6V for VOUT=3.3V, IOUT=30mA VOUT=3.3V, IOUT=300mA, VOUT=-1% IOUT=0mA 170 60 0.1 f=100Hz f=1kHz f=10kHz 68 68 54 100 50 50
0.7 0.2 300 90 1.0
% % mV uA uA dB ppm/C mA uS
SHDN = LOW
Ripple 1Vpp, VIN=3V for VOUT=1.2V VIN=4.3V for VOUT=3.3V IOUT=30mA, -40C TA 85C VOUT=0V
6 0.4 60 3 165 30
V V M C C
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
TYPICAL CHARACTERISTICS @ 25C
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QUIESCENT CURRENT vs. INPUT VOLTAGE
80 70 Quiescent Current (uA) 60 50 40 30 20 10 0 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) VOUT=1.2V, IOUT=0
Quiescent Current (uA) 120 110 100 90 80 70 60 50 0
QUIESCENT CURRENT vs. OUTPUT CURRENT
VOUT=1.2V, VIN=2.5V
50
100 Output Current (mA)
150
200
LOAD REGULATION
0.1 0 VOU T C hange (% ) -0.1 -0.2 -0.3 -0.4 -0.5 0 50 100 150 200 250 300 Load Current (mA) 1.2V VIN=2.5V for VOUT=1.2V VIN=VOUT+1V for VOUT=1.8V, 2.5V, 3.3V 1.8V 3.3V, 2.5V
VOU T C hange (% ) 0.1 0.05 0 -0.05 -0.1 -0.15 -0.2 -0.25 -0.3 2.5 3 IOUT=30mA
LINE REGULATION
3.3V
2.5V
1.2V, 1.8V
3.5
4
4.5
5
5.5
6
Input Voltage (V)
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
A L C H A R A C T E R I S T I C S @ 2 5 C
T
Y
P
I
C
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DROPOUT VOLTAGE vs. OUTPUT CURRENT
250
OUTPUT VOLTAGE vs. OUTPUT CURRENT
1.4 OUTPUT VOLAGE (V)
Dropout Voltage (mV)
200 150 100 50 0 0 50 100
VIN=2.5V VIN=3.3V
1.2 1 0.8 0.6 0.4 0.2 0 VOUT=1.2V, VIN=2.5V
VIN=5V
150
200
250
300
0
50 100 150 200 250 300 350 400 450 500 550 600 Output Current (mA)
Output Current (mA)
LOAD TRANSIENT RESPONSE (1mA to 300mA)
LOAD TRANSIENT RESPONSE (1mA to 300mA)
LX8213 LX8213
Channel 1 - 1.2V Output AC Coupled Channel 4 - Output Current 1mA to 300mA, Slew Rate = 0.02A/uS
Channel 1 - 3.3V Output AC Coupled Channel 4 - Output Current 1mA to 300mA, Slew Rate = 0.02A/uS
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
TYPICAL CHARACTERISTICS @ 25C LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE
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Channel 1 - 1.2V Output at 30mA, AC Coupled Channel 3 - VIN 2.5V to 3.5V SOFT START WAVEFORM
Channel 1 - 3.3V Output at 30mA, AC Coupled Channel 3 - VIN 3.75V to 5V SOFT START WAVEFORM
LX8213 LX8213
Channel 1 - 1.2V Output at No Load Channel 2 - SHDN 0V to 2V
Channel 1 - 3.3V Output at No Load Channel 2 - SHDN 0V to 2V
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
TYPICAL CHARACTERISTICS @ 25C
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VREF VOLTAGE vs AMBIENT TEMPERATURE
815 805 VR EF (m V)
POWER SUPPLY REJECTION RATIO
100 90 80 70 60 50 40 30 20 10 0 0.1
10mA
785 775 765 755 745 -45 -30 -15 0 15 30 45 60 75 90 Ambient Temperature (C) VOUT=1.2V, VIN=2.5V
PSR R (dB)
795
300mA
CIN=0, VOUT=1.2V, VIN=2.5V 1 Frequency (kHz) 10 100
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
SIMPLIFIED BLOCK DIAGRAM
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Figure 1 - LX8213-00 (Adjustable Output) Simplified Block Diagram
APPLICATION SCHEMATIC
LX8213 LX8213
Figure 2 - LX8213-12/33 Fixed Output Version Application Schematic
Figure 3 - LX8213-00 Adjustable Output Application Schematic
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
APPLICATION INFORMATION Description The LX8213 is a family of CMOS based LDO (Low Drop-Out) regulators in a small 5 pin SOT-23 package that provides a compact and cost effective solution. The LX8213 is offered with fixed output voltages of 1.2V or 3.3V, in addition to an adjustable version with an output voltage range of 1.2V to 5.5V. The LX8213 features low power consumption over a wide supply voltage range, high output voltage accuracy, low dropout, excellent line and load regulation, fast transient response, and low noise. Please refer to the Electrical Characteristics Table for the specifications. Foldback Current Limit The LX8213 uses a foldback current limit. When the load current exceeds approximately 400mA, the output voltage is reduced along with the output current, minimizing power dissipated and protecting the device from excessive heating. Short Circuit Current Protection Under conditions where the output of the LX8213 is shorted to ground, internal circuitry will limit the device to source only about 50mA. Temperature Protection The thermal protection shuts down the LX8213 when the junction temperature exceeds approximately 165C, with a hysteresis of To improve load transient response and noise rejection, an about 30C. input bypass capacitor is recommended, but it is not required Thermal Consideration for stability. There are no requirements for the ESR (Equivalent Series Resistor) on the input capacitor, but Thermal shutdown protects the integrated circuit from thermal tolerance and temperature coefficient must be considered overload caused from a rise in junction temperature during power when selecting the capacitor to ensure the capacitor will be dissipation. This means the protection is intended for fault around 1F over the entire operating temperature range. protection only and not as a means of current or power limiting Capacitors with X5R or X7R characteristics are recommended. during normal application usage. Proper thermal evaluation should be done to ensure that the junction temperature dose not Output Capacitor exceed it's maximum rating. Operating at the maximum TJ of For stability of the regulator, use a minimum 1uF capacitor to 150C can impact reliability. Due to variation in individual device bypass from VOUT to GND. Note that the LX8213 is stable electrical characteristics and thermal resistance, the built in using low ESR ceramic capacitors. Capacitors with X5R or thermal overload protection may be activated at power levels X7R characteristics generally perform well and are slightly above or below the rated dissipation. recommended. Power dissipation for regulator can be calculated using the following equation: Adjustable Output Voltage Input Capacitor The LX8213-00 output voltage can be set within the range of PD = (VIN(MAX)-VOUT(MIN)) * IOUT(MAX) 1.2V to 5.5V by connecting the FB pin to an external resistor (Note: power dissipation resulting from quiescent current is divider (See Figure 3). The output voltage can be calculated negligible) using: For the SOT23 package, thermal resistance, JA is 250C/W when mounted on a FR4 copper clad PCB. Junction temperature R1 VOUT = 0.8 1 + of the integrated circuit can be calculated using:
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TJ = TA + TRISE, substituting: TA + (PD * JA). R2 is chosen to minimize the power dissipated by the resistor An example: Given conditions: TA = 25C, VIN= 2.5V, VOUT= 1.2V, divider network while providing enough FB input bias current. IOUT= 200mA. A value of 8.06k is recommended. Calculated values: Shutdown ( SHDN ) Total Power dissipation PD(total) = (2.5-1.2) V * 0.2A =0.26W Junction Temperature TJ = 25C +(0.26W *250C/W) = 90C The LX8213 includes an active low shutdown input ( SHDN ). When the SHDN pin is left floating, an internal pull down resistor to GND of 3M will automatically disable the device. Upon shutdown, an internal MOSFET connected from VOUT to GND will be turned ON to discharge the output capacitor. To enable the regulator, set SHDN to logic high. If shutdown capability is not required, connect SHDN pin to VIN. For specification on minimum and maximum logic high levels, please refer to the Electrical Characteristics Table.
Copyright (c) 2009 Rev. 1.1, 2009-03-24
R2
LX8213 LX8213
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
PRODUCTION DATASHEET
TM (R)
LX8213
300mA Low Noise CMOS LDO Regulator
PACKAGE DIMENSION
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SE
5 Pin Plastic SOT-23
D G
H
E
A1
A C B K
Dim A A1 B C D E F G H I J K
Note:
MILLIMETERS MIN MAX 0.90 1.30 0.90 1.45 0.25 0.50 0.09 0.20 2.80 3.10 1.50 1.75 0.95 BSC 1.90 BSC 2.60 3.00 0.35 0.55 0.00 0.15 10 MAX
INCHES MIN MAX 0.035 0.051 0.035 0.057 0.010 0.020 0.004 0.008 0.110 0.122 0.059 0.069 0.038 BSC 0.075 BSC 0.102 0.118 0.014 0.022 0.000 0.006 10 MAX
F
J
I
1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006") on any side. Lead dimension shall not include solder coverage.
LX8213 LX8213
Copyright (c) 2009 Rev. 1.1, 2009-03-24
Microsemi
Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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