MIC5256 Micrel Semiconductor, MIC5256 Datasheet
MIC5256
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MIC5256 Summary of contents
Page 1
... The MIC5256 is an efficient, precise CMOS voltage regula- tor. It offers better than 1% initial accuracy, extremely low- dropout voltage (typically 135mV at 150mA) and low ground current (typically 90 A) over load. The MIC5256 features an error flag that indicates an output fault condition such as overcurrent, thermal shutdown and dropout. ...
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... GND FLG 5 OUT MIC5256 BYP MIC5256-x.xBD5 Pin Function Supply Input. Ground. Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Error Flag (Output): Open-drain output. Active low indicates an output undervoltage condition. Regulator Output. 2 Micrel ...
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... Max –1 –2 0.02 0.05 1.5 2.5 0.1 5.0 90 150 135 200 250 0.2 90 150 117 = OUT = OUT 45 160 425 tbd 0.4 1.6 0.01 0.01 500 90 0.02 0.1 0.01 150 – Exceeding the maximum allowable J(max Micrel IN Units + %/ V(rms MIC5256 ...
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... For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum input operating voltage is 2.7V. Note 7. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current. MIC5256 4 Micrel of the MIC5255-x.xBM5 (all JA ...
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... TEMPERATURE ( C) Dropout Characteristics 3 100 A 3 LOAD 2 150mA 2 LOAD 1 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 INPUT VOLTAGE (V) Dropout Voltage 180 T = –40C 160 140 120 100 25C T = 125C 100 120 140 160 OUTPUT CURRENT (mA) MIC5256 ...
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... IN OUT 490 480 470 460 450 440 430 420 410 400 -40 - 100120140 TEMPERATURE ( C) Enable Threshold vs. Temperature 4.5 3.5 2.5 1.5 0 100 A LOAD TEMPERATURE ( C) MIC5256 47k ON OFF 0. OUT Figure 1. Test Circuit 6 Output Voltage vs. Temperature 3.05 3.04 3.03 3.02 3.01 3.00 2.99 2.98 2.97 2.96 I LOAD 2.95 -40 - 100120140 TEMPERATURE ( C) ...
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... OUT * See Test Circuit Figure 1 7 Micrel Line Transient Response Ceramic Ceramic OUT I = 100 A OUT TIME (400 s/div) Shutdown Delay Ceramic Ceramic OUT I = 100 A L TIME (400 s/div) Error Flag Shutdown* TIME (400 s/div) MIC5256 ...
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... MIC5256 Block Diagram IN EN Reference Voltage Thermal Sensor Under- voltage Lockout Overcurrent Dropout Detection MIC5256 Startup/ Quickstart Shutdown Control FAULT Error Current Amplifier Amplifier ACTIVE SHUTDOWN Out of Regulation Detection 8 OUT FLG GND June 2003 Micrel ...
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... N-channel MOSFET that turns on when the device is disabled. This allows the output capacitor and load to dis- charge, de-energizing the load. No Load Stability The MIC5256 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 MIC5256 is designed to provide 150mA of continuous current in a very small package ...
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... SOT-23-5 package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the Regulator Thermals Designing with Low-Dropout Voltage Regu- section of Micrel’s lators handbook. MIC5256 Fixed Regulator Applications 47k MIC5256-x.xBM5 1 Ceramic ...
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... No license is granted by implication or otherwise under any patent or patent right of Micrel, Inc. June 2003 1.75 (0.069) 3.00 (0.118) 1.50 (0.059) 2.60 (0.102) DIMENSIONS: MM (INCH) 1.30 (0.051) 0.90 (0.035 0.15 (0.006) 0.60 (0.024) 0.00 (0.000) 0.10 (0.004) SOT-23-5 (M5) 1.90BSC 0.30 DIMENSIONS: 0.45 Millimeter 1.00 0.90 1.60BSC 0.20 0.30 0.10 0.12 0.50 0.01 TSOT-23-5 (D5 (408) 944-0970 http://www.micrel.com FAX WEB © 2003 Micrel, Incorporated 11 Micrel 0.20 (0.008) 0.09 (0.004) 1.60BSC MIC5256 ...