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MIC5264
150mA Cap Dual LDO Regulator
General Description
The MIC5264 is a dual 150mA LDO in tiny 2.5mm x 2.5mm MLFTM packaging ideal for applications where cost is the priority. The MIC5264 is ideal for any application in portable electronics, including both RF and Digital applications. With low output noise and high PSRR, the MIC5264 is ideal for noise sensitive RF applications. While the fast transient response and active shutdown circuitry makes it well-suited for powering digital circuitry. The MIC5264 has a 2.7V to 5.5V input operating voltage range, making it ideal for operation from a single cell lithium ion battery or fixed 3.3V and 5V systems. Each LDO is completely independent and can be powered independently, making it easier to use in distributed power applications. The MIC5264 offers low dropout voltage (210mV at 150mA), low output noise (57Vrms), high PSRR and integrates an active shutdown circuit on the output of each regulator to discharge the output voltage when disabled. Data sheets and supporting documentation can be found on Micrel's web site at: www.micrel.com
Features
* * * * * * * * * * 2.7V to 5.5V supply voltage. Low 75A quiescent current per LDO. Tiny 2.5mm x 2.5mm MLFTM package. Low Noise - 57Vrms. High PSRR - 60dB at 1kHz. Low dropout voltage - 210mV at 150mA. Stable with ceramic output capacitors. Independent enable pins. Fast transient response. Active shutdown on both outputs.
Applications
* * * Cellular Telephones PDAs GPS Receivers
Typical Application
MIC5264-xxYML VIN 1 VIN 2 EN 1 EN 2 1F 0.01F BYP1 GND BYP2 0.01F OUT 1 OUT 2 1F 1F Rx/Synth Tx RF Transceiver
-80 -70 -60 -50 -40 -30 -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.1F COUT = 1F 0 0.01 0.1 1 10 100 FREQUENCY (kHz)
Power Supply Rejection Ratio
1000
RF Power Supply
MicroLeadFrame and MLF are 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 2005
M9999-041505 (408) 955-1690
Micrel, Inc.
MIC5264
Ordering Information
Part Number Full MIC5264-2.8/1.5YML MIC5264-2.8/2.8YML MIC5264-2.85/2.85YML MIC5264-3.0/1.8YML MIC5264-3.0/2.8YML MIC5264-3.0/3.0YML Manufacturing MIC5264-MFYML MIC5264-MMYML MIC5264-NNYML MIC5264-PGYML MIC5264-PMYML MIC5264-PPYML Vo1/Vo2 2.8V/1.5V 2.8V/2.8V 2.85V/2.85V 3.0V/1.8V 3.0V/2.8V 3.0V/3.0V Marking Code MAMF MAMM MANN MAPG MAPM MAPP Junction Temp. Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package Pb-Free 2.5mm x 2.5mm MLFTM 2.5mm x 2.5mm MLFTM 2.5mm x 2.5mm MLFTM 2.5mm x 2.5mm MLFTM 2.5mm x 2.5mm MLFTM 2.5mm x 2.5mm MLFTM
Note: 1. Other Voltage Combinations available. Contact Micrel for details.
Pin Configuration
GND1 1 IN1 2 OUT1 3 BYP2 4 EN2 5 10 EN1 9 BYP1 8 OUT2 7 IN2 6 GND2
2.5mm x 2.5mm MLF-10L (ML)
Pin Description
Pin Number 1 2 3 4 5 6 7 8 9 10 EP Pin Name GND1 IN1 OUT1 BYP2 EN2 GND2 IN2 OUT2 BYP1 EN1 Exposed Pad Pin Function Ground Supply Voltage Regulator Output Reference Bypass: Connect external 0.01F <= CBYP <= 1.0F capacitor to GND to reduce output noise. Do not leave open. Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Ground Supply Voltage Regulator Output Reference Bypass: Connect external 0.01F <= CBYP <= 1.0F capacitor to GND to reduce output noise. Do not leave open. Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Exposed Pad. Connect to external ground pins.
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MIC5264
Absolute Maximum Ratings(1)
Supply Input Voltage (VIN1/IN2) .............................. 0V to +7V Enable Input Voltage (V EN1/EN2)............................ 0V to +7V Power Dissipation (PD) .......................... Internally Limited (3) Junction Temperature (TJ) ...........................-40C to 125C Lead Temperature (soldering, #sec.)...........-55C to 150C Storage Temperature (Ts) .......................................... 260C EDS Rating (4) ................................................................. 2kV
Operating Ratings(2)
Supply Input Voltage (VIN1/IN2) ...................... +2.7V to +5.5V Enable Input Voltage (VEN1/EN2) ............................ 0V to +VIN Junction Temperature (TA) ........................ -40C to +125C Junction Thermal Resistance MLF-10L (JA) ....................................................75C/W
Electrical Characteristics(5)
VEN = VIN = VOUT + 1V; IL =100A; CL = 1.0F; CBYP = 0.01F per output; TA = 25C, bold values indicate -40C< TA < +85C; unless noted.
Parameter Output Voltage Accuracy Line Regulation Load Regulation Dropout Voltage Quiescent Current Ground Pin Current (Per Regulator) PSRR (Ripple Rejection) Current Limit Output Noise Enable Input (EN1 and EN2) Enable Input Logic Low Enable Input Logic High Enable Input Current Thermal Shutdown Thermal Shutdown Temperature Hysteresis Turn-on/Turn-off Characteristics Turn-on Time Discharge Resistance Condition IOUT = 100uA VIN = VOUT +1V to 5.5V IOUT = 0.1mA to 150mA IOUT = 50mA IOUT = 150mA VEN < 0.4V IOUT = 0mA IOUT = 150mA f = 100Hz, CBYP = 0.1F, ILOAD = 50mA f = 1kHz, CBYP = 0.1F, ILOAD = 50mA f = 10kHz, CBYP = 0.1F, ILOAD = 50mA VOUT = 0V COUT = 1.0F, CBYP = 0.1F, f = 10Hz to 100kHz VIN = 2.7V to 5.5V, regulator shutdown VIN = 2.7V to 5.5V, regulator enabled VIL < 0.4V, regulator shutdown VIH > 1.6V, regulator enabled Min -2 -3 0.05 2 75 210 0.2 75 80 62 64 64 225 57 Typ Max 2 3 0.2 3 500 2 120 150 Units % % % % mV mV A A A dB dB dB mA V (rms)
0.2
1.6 0.01 0.01 150 10 40 500 150
V V A A
C C
s
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. The JA of the MIC5264x.xYML (all versions) is 75C/W on a PC board (see "Thermal Considerations" section for further details). 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only.
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MIC5264
Typical Characteristics
-70 -60 -50 -40 -30 -20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.01F COUT = 1F 0 0.01 0.1 1 10 100 FREQUENCY (kHz)
Power Supply Rejection Ratio
-80 -70 -60 -50 -40 -30
Power Supply Rejection Ratio
-70 -60 -50 -40 -30
Power Supply Rejection Ratio
1000
-20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 0.1F COUT = 1F 0 0.01 0.1 1 10 100 FREQUENCY (kHz)
1000
-20 VIN = VOUT + 1V VOUT = 3.0V -10 BYP = 1F COUT = 1F 0 10 100 1000 10000 0.01 0.1 1 10 100000 100 FREQUENCY (kHz)
1000000
1000
0.30 0.25 0.20 0.15 0.10 0.05 0.00 0
Dropout Voltage vs. Output Current
125C
0.30 0.25
Dropout Voltage vs. Temperature
3.20 3.15
Dropout Voltage vs. Temperature
25C
0.20 0.15
150mA 100mA 50mA 10mA 1mA
3.10 3.05 3.00 2.95 2.90 Iload = 100A VOUT = 3.0V VIN = VOUT + 1
-40C
0.10 0.05
2.85
25 50 75 100 125 150 OUTPUT CURRENT (mA)
0.00 -40 -15 10 35 60 85 110 TEMPERATURE (C)
2.80 -40 -15 10 35 60 85 110 TEMPERATURE (C)
Output Voltage vs. Input Voltage
3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 INPUT VOLTAGE(V) 5 100A Load 150A Load
83 82 81 80 79 78 77 76 75 74 73 72 0
Ground Pin Current vs. Output Current
78 76 74 72 70 68 -40
Ground Pin Current vs. Temperature
VIN = VOUT + 1V VOUT = 3.0V 30 60 90 120 150 OUTPUT CURRENT (mA)
Iload = 100A -10 20 50 80 110 TEMPERATURE (C)
95 90 85 80 75 70 65 60 -40
Ground Pin Current vs. Temperature
90 80 70 60 50 40 30 20 10 0 0
Ground Pin Current vs. Input Voltage
90 80 70 60 50 40 30 20 10 5 0 0
Ground Pin Current vs. Input Voltage
Iload = 150mA -10 20 50 80 110 TEMPERATURE (C)
Iload = 100A VOUT = 3.0V VIN = VOUT + 1 1 2 3 4 INPUT VOLTAGE (V)
Iload = 150A VOUT = 3.0V VIN = VOUT + 1 1 2 3 4 INPUT VOLTAGE (V) 5
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MIC5264
Typical Characteristics (continued)
Short Circuit Current vs. Input Voltage
290 270 250 230 210 190 170 150 3 3.5 4 4.5 5 INPUT VOLTAGE (V) 5.5 VIN = 4.2V 0.01 VOUT = 2.8V COUT = 1.0F BYP = 0.1F IOUT = 150mA 0.001 10 100 0.01 0.1 1000 1 10000 100000 1000 10000000 10 100 1000000 10000 FREQUENCY (kHz) 0.1 10
Output Noise Spectral Density
1
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MIC5264
Functional Characteristics
Line Transient Response
Output Voltage (50mV/div)
Input Voltage (1V/div)
Load Transient Response
5.0V 4.0V
Output Voltage (20mV/div)
Output Current (50mA/div)
COUT = 1F Ceramic CBYP = 0.01F IOUT = 150mA VOUT = 3.0V VIN = V OUT + 1V
150mA
100A
COUT = 1F Ceramic CBYP = 0.01F VOUT = 3.0V VIN = V OUT + 1V
Time (400s/div)
Time (5s/div)
Enable Pin Delay
Output Voltage (1V/div)
Shutdown Delay
Enable Voltage (1V/div)
Output Voltage (1V/div)
CIN = 1F Ceramic CBYP = 0.01F IOUT = 10mA VOUT = 3.0V VIN = VOUT + 1V
Time (10s/div)
Enable Voltage (1V/div)
CIN = 1F Ceramic COUT = 1F Ceramic IOUT = 10mA VOUT = 3.0V VIN = V OUT + 1V
Time (100s/div)
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MIC5264
Block Diagram
IN1 Reference Voltage EN1 Startup/ Shutdown Control Quickstart/ Noise Cancellation BYP1
Thermal Sensor
FAULT
Error Amplifier
Current Amplifier
OUT1
Undervoltage Lockout
ACTIVE SHUTDOWN
GND1
IN2 Reference Voltage EN2 Startup/ Shutdown Control Quickstart/ Noise Cancellation BYP2
Thermal Sensor
FAULT
Error Amplifier
Current Amplifier
OUT2
Undervoltage Lockout
ACTIVE SHUTDOWN
GND2
MIC5264 Diagram
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MIC5264 increases slightly with respect to bypass capacitance. A unique quick-start circuit allows the MIC5264 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. Active Shutdown The MIC5264 also features an active shutdown clamp, which is an N-channel MOSFET that turns on when the device is disabled. This allows the output capacitor and load to discharge, de-energizing the load. No-Load Stability The MIC5264 will remain stable and in regulation with no load unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5264 is designed to provide 150mA of continuous current per output 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 5.0V, the VOUT1 output voltage is 3.0V at 150mA; VOUT2 output voltage is 2.8V at 100mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN - VOUT) IOUT + VIN IGND Because this device is CMOS and the ground current is typically <100uA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (5.0V-3.0V) x 150mA + (5.0V-2.8V) x 100mA PD = 0.52W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation:
T J (max) - T A PD(max) = JA
Application Information
Enable/Shutdown The MIC5264 comes with two independent active-high enable pins that allow the regulator in each output to be disabled separately. 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. This part is CMOS and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Input Capacitor The MIC5264 is a high performance, high bandwidth device. Therefore, it requires well-bypassed input supplies for optimal performance. A 1uF 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 high-frequency noise and are good practice in any RF-based circuit. Output Capacitor The MIC5264 requires capacitors at both outputs for stability. The design requires 1uF or greater on each output to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The maximum recommended ESR is 300m. The output capacitor can be increased, but performance has been optimized for a 1uF 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. Bypass Capacitor A capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.01uF capacitor is recommended for applications that require low-noise outputs. The bypass capacitor can be increased, further reducing noise and improving PSRR. Turn-on time April 2005 8
TJ(max) = 125C, the max. junction temperature of the die JA thermal resistance = 63C/W
M9999-041505 (408) 955-1690
Micrel, Inc. MIC5264 Junction-To-Ambient Thermal Resistance
Package 2.5mm x 2.5mm MLF-10 JA Recommended Minimum Footprint 75C/W Thermal Resistance JC 2C/W
MIC5264
125C - T A 0.52W = 63C
TA = 92.24C

Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 63C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5264PMYML at an input voltage of 5.0V at 150mA on VOUT1 and 100mA on VOUT2 with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows:
Therefore, a 3.0V application at 150mA on Ch1 and 2.8V at 100mA on Ch2 can accept an ambient operating temperature of 92C in a 2.5mm x 2.5mm MLFTM 10Lead 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
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Micrel, Inc.
MIC5264
Package Information
10-Pin 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) 2005 Micrel, Incorporated.
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