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MIC5310
Dual, 150mA Cap LDO in 2mm x 2mm MLF(R)
General Description
The MIC5310 is a tiny Dual Ultra Low-Dropout (ULDOTM) linear regulator ideally suited for portable electronics due to its high power supply ripple rejection (PSRR) and ultra low output noise. The MIC5310 integrates two high-performance; 150mA ULDOs into a tiny 2mm x 2mm leadless MLF(R) package, which provides exceptional thermal package characteristics. The MIC5310 is a Cap design which enables operation with very small ceramic output capacitors for stability, thereby reducing required board space and component cost. The combination of extremely low-drop-out voltage, high power supply rejection and exceptional thermal package characteristics makes it ideal for powering RF/noise sensitive circuitry, cellular phone camera modules, imaging sensors for digital still cameras, PDAs, MP3 players and WebCam applications The MIC5310 ULDOTM is available in fixed-output voltages in the tiny 8-pin 2mm x 2mm leadless MLF(R) package which occupies less than half the board area of a single SOT-6 package. Additional voltage options are available. For more information, contact Micrel marketing department. Data sheets and support documentation can be found on Micrel's web site at www.micrel.com.
Features
* * * * * * * * * * * * 2.3V to 5.5V input voltage range Ultra-low dropout voltage ULDOTM 35mV @ 150mA High PSRR - >70dB @ 1KHz Ultra-low output noise: 30VRMS 2% initial output accuracy Tiny 8-pin 2mm x 2mm MLF(R) leadless package Excellent Load/Line transient response Fast start-up time: 30s Cap stable with 1F ceramic capacitor Thermal shutdown protection Low quiescent current: 75A per output Current limit protection
Applications
* * * * * * Mobile phones PDAs GPS receivers Portable electronics Portable media players Digital still and video cameras
Typical Application
MIC5310-x.xYML VIN EN 1 EN 2 1F BYP 0.1F GND 1F 1F RF Transceiver VOUT 1 VOUT 2 Rx/Synth Tx
RF Power Supply Circuit
ULDO is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
April 2006
M9999-042406 (408) 955-1690
Micrel, Inc.
MIC5310
Block Diagram
VIN
LDO1
VOUT 1
LDO2 EN 1 EN 2 Enable
VOUT 2
BYP
Reference
GND
MIC5310 Fixed Block Diagram
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MIC5310
Ordering Information
Part number MIC5310-1.8/1.5YML MIC5310-2.5/2.5YML MIC5310-2.6/1.85YML MIC5310-2.8/1.5YML MIC5310-2.8/1.8YML MIC5310-2.8/2.6YML MIC5310-2.8/2.8YML MIC5310-2.85/2.85YML MIC5310-2.9/1.8YML MIC5310-2.9/2.9YML MIC5310-3.0/1.8YML MIC5310-3.0/2.6YML MIC5310-3.0/2.85YML MIC5310-3.0/3.0YML MIC5310-3.3/1.8YML MIC5310-3.3/2.6YML MIC5310-3.3/2.8YML MIC5310-3.3/3.0YML MIC5310-3.3/3.2YML MIC5310-3.3/3.3YML Manufacturing Part Number MIC5310-GFYML MIC5310-JJYML MIC5310-KDYML MIC5310-MFYML MIC5310-MGYML MIC5310-MKYML MIC5310-MMYML MIC5310-NNYML MIC5310-OGYML MIC5310-OOYML MIC5310-PGYML MIC5310-PKYML MIC5310-PNYML MIC5310-PPYML MIC5310-SGYML MIC5310-SKYML MIC5310-SMYML MIC5310-SPYML MIC5310-SRYML MIC5310-SSYML Voltage 1.8V/1.5V 2.5V/2.5V 2.6V/1.85V 2.8V/1.5V 2.8V/1.8V 2.8V/2.6V 2.8V/2.8V 2.85V/2.85V 2.9V/1.8V 2.9V/2.9V 3.0V/1.8V 3.0V/2.6V 3.0V/2.85V 3.0V/3.0V 3.3V/1.8V 3.3V/2.6V 3.3V/2.8V 3.3V/3.0V 3.3V/3.2V 3.3V/3.3V Junction Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R) 8-Pin 2x2 MLF(R)
Other voltage options available. Contact Micrel for more details.
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Micrel, Inc.
MIC5310
Pin Configuration
VIN 1 GND 2 BYP 3 EN2 4 8 7 6 5 VOUT1 VOUT2 NC EN1
8-Pin 2mm x 2mm MLF (ML) Top View
Pin Description
Pin Number MLF-8 1 2 3 4 5 6 7 8 Pin Name VIN GND BYP EN2 EN1 NC VOUT2 VOUT1 Pin Function Supply Input. Ground Reference Bypass: Connect external 0.1F to GND to reduce output noise. May be left open when bypass capacitor is not required. Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off; Do not leave floating. Not internally connected Regulator Output - LDO2 Regulator Output - LDO1
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Micrel, Inc.
MIC5310
Absolute Maximum Ratings(1)
Supply Voltage (VIN) .....................................0V to +6V Enable Input Voltage (VEN)...........................0V to +6V Power Dissipation...........................Internally Limited(3) Lead Temperature (soldering, 3sec ...................260C Storage Temperature (TS) ................. -65C to +150C ESD Rating(4) .........................................................2kV
Operating Ratings(2)
Supply voltage (VIN)............................... +2.3V to +5.5V Enable Input Voltage (VEN).............................. 0V to VIN Junction Temperature ......................... -40C to +125C Junction Thermal Resistance MLF-8 (JA) ............................................... 90C/W
Electrical Characteristics(5)
VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100A; COUT1 = COUT2 = 1F; CBYP = 0.1F; TJ = 25C, bold values indicate -40C TJ +125C, unless noted.
Parameter Output Voltage Accuracy Line Regulation Load Regulation Dropout Voltage (Note 6) Conditions Variation from nominal VOUT Variation from nominal VOUT; -40C to +125C VIN = VOUT + 1V to 5.5V; IOUT = 100A IOUT = 100A to 150mA IOUT = 100A IOUT = 50mA IOUT = 100mA IOUT = 150mA Ground Current EN1 = High; EN2 = Low; IOUT = 100A to 150mA EN1 = Low; EN2 = High; IOUT = 100A to 150mA EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA Ground Current in Shutdown Ripple Rejection Current Limit Output Voltage Noise Enable Inputs (EN1 / EN2) Enable Input Voltage Enable Input Current Logic Low Logic High VIL 0.2V VIH 1.0V Turn-on Time (See Timing Diagram) Turn-on Time (LDO1 and 2)
Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal VOUT. For outputs below 2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V.
Min -2.0 -3.0
Typ
Max +2.0 +3.0
Units % % %/V %/V % mV mV mV mV A A A A dB dB
0.02 0.5 0.1 12 25 35 85 85 150 0.01 70 65 300 550 30
0.3 0.6 2.0 50 75 100 120 120 190 2
EN1 = EN2 = 0V f = 1kHz; COUT = 1.0F; CBYP = 0.1F f = 20kHz; COUT = 1.0F; CBYP = 0.1F VOUT = 0V COUT = 1.0 F; CBYP = 0.1F; 10Hz to 100kHz
950
mA VRMS
0.2 1.1 0.01 0.01 30 100
V V A A s
COUT = 1.0F; CBYP = 0.01F
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MIC5310
Typical Characteristics
-80 -70 -60 -50 -40 -30 VIN = 3.4V -20 VOUT = 3V COUT = 1F -10 CBYP = 0.1F IOUT = 50mA 0 0.1 1 10 100 FREQUENCY (kHz)
Power Supply Rejection Ratio
-80 -70 -60 -50 -40
Power Supply Rejection Ratio
40 35 30 25 20 15 10 5 1,000 0 0
Dropout Voltage vs. Output Current
1,000
-30 VIN = 3.6V -20 VOUT = 3V COUT = 1F -10 CBYP = 0.1F IOUT = 150mA 0 0.1 1 10 100 FREQUENCY (kHz)
VOUT = 3V COUT = 1F 25 50 75 100 125 150 OUTPUT CURRENT (mA)
90 88 86 150mA 84
Ground Current vs. Temperature
3.20 3.15 3.10 3.05 3.00 2.95 2.90 2.85 2.80 2.75 2.70
Output Voltage vs. Temperature
3.3 3.2 3.1 3.0
Output Voltage vs. Output Current
82 100mA 80 50mA 78 76 100A VIN = VOUT + 1V 74 VOUT = 3V COUT = 1F 72 EN1 = VIN, EN2 = GND 70 20 40 60 80 TEMPERATURE (C)
VIN = VOUT + 1V VIN = EN1 = EN2 VOUT = 3V COUT = 1F IOUT = 100A 20 40 60 80 TEMPERATURE (C)
2.9 2.8 2.7 0 VIN = VOUT + 1V VOUT = 3V COUT = 1F 25 50 75 100 125 150 OUTPUT CURRENT (mA)
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1
Output Voltage vs. Input Voltage
90
Dropout Voltage vs. Temperature
VOUT = 3V 80 VIN = EN1 = EN2 70 COUT = 1F 60 50 150mA 100mA 50mA 10mA 100A 40 30 20 10
90 88 86 84 82 80 78 76 74 72 70 0
Ground Current vs. Output Current
150mA 100A COUT = 1F 2 3 4 5 INPUT VOLTAGE (V) 6
0
VIN = VOUT + 1V VOUT = 3V VEN1 = VEN2 = VIN COUT1 = COUT2 = 1F 25 50 75 100 125 150 OUTPUT CURRENT (mA)
20 40 60 80 TEMPERATURE (C)
600 580 560 540 520 500 480 460 440
Current Limit vs. Input Voltage
10
Output Noise Spectral Density
1
0.1 VIN = 4V 0.01 VOUT = 3V COUT = 1F CBYP = 0.1F ILOAD = 60mA 0.001 0.01 0.1 1 10 100 1,000 FREQUENCY (kHz)
COUT = 1F 420 VEN = VIN 400 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V)
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Micrel, Inc.
MIC5310
Functional Characteristics
Enable Turn-On
Load Transient
Output Voltage (20mV/div)
150mA
VIN = VOUT + 1V VOUT = 3V COUT = 1F CBYP = 0.1F
Enable (2V/div)
Output Voltage (1V/div)
VIN = VOUT + 1V VOUT = 3V COUT = 1F CBYP = 0.01F Time (10s/div)
Output Current (50mA/div)
10mA
Time (40s/div)
Line Transient
5V
Input Voltage (2V/div)
4V VIN = VOUT + 1V VOUT = 3V COUT = 1F CBYP = 0.1F IOUT = 10mA
Output Voltage (50mV/div)
Time (40s/div)
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Micrel, Inc.
MIC5310
Applications Information
Enable/Shutdown The MIC5310 comes with dual active-high enable pins that allow each regulator to be enabled independently. Forcing the enable pin low disables the regulator and sends it into a "zero" off-mode-current state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Input Capacitor The MIC5310 is a high-performance, high bandwidth device. Therefore, it requires a well-bypassed input supply for optimal performance. A 1F capacitor is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional highfrequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out highfrequency noise and are good practice in any RFbased circuit. Output Capacitor The MIC5310 requires an output capacitor of 1F or greater to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1F ceramic output capacitor and does not improve significantly with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. low-noise outputs. The bypass capacitor can be increased, further reducing noise and improving PSRR. Turn-on time increases slightly with respect to bypass capacitance. A unique, quick-start circuit allows the MIC5310 to drive a large capacitor on the bypass pin without significantly slowing turn-on time.
No-Load Stability Unlike many other voltage regulators, the MIC5310 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5310 is designed to provide 150mA of continuous current for both outputs in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. Given that the input voltage is 3.3V, the output voltage is 2.8V for VOUT1, 1.5V for VOUT2 and the output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation:
PD = (VIN - VOUT1) IOUT1 + (VIN - VOUT2) IOUT2+ VIN IGND Because this device is CMOS and the ground current is typically <100A over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.3V - 2.8V) x 150mA + (3.3V -1.5) x 150mA PD = 0.345W To determine the maximum ambient operating temperature of the package, use the junction-toambient thermal resistance of the device and the following basic equation:
PD(MAX) =

TJ(MAX) - TA
JA
TJ(max) = 125C, the maximum junction temperature of the die JA thermal resistance = 90C/W. The table below shows junction-to-ambient thermal resistance for the MIC5310 in different packages.
Bypass Capacitor A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1F capacitor is recommended for applications that require
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M9999-042406 (408) 955-1690
Micrel, Inc.
MIC5310 an input voltage of 3.3V and 150mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.345W = (125C - TA)/(90C/W) TA=93.95C Therefore, a 2.8V/1.5V application with 150mA at each output current can accept an ambient operating temperature of 93.95C in a 2mm x 2mm MLF(R) package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the "Regulator Thermals" section of Micrel's Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
Package 8-Pin 2x2 MLF(R)
JA Recommended Minimum Footprint 90C/W
Thermal Resistance
Substituting PD for PD(max) and operating temperature will operating conditions for the junction-to-ambient thermal minimum footprint is 90C/W. solving for the ambient give the maximum regulator circuit. The resistance for the
The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5310-MFYML at
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M9999-042406 (408) 955-1690
Micrel, Inc.
MIC5310
Package Information
8-Pin 2mm x 2mm MLF (ML)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2006 Micrel, Inc.
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