MIC5157 Micrel Semiconductor, MIC5157 Datasheet
MIC5157
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MIC5157 Summary of contents
Page 1
... The MIC5156 is available in an 8-pin DIP or SOIC. The MIC5157 and MIC5158 are available in a 14-pin DIP or SOIC which operate from –40°C to +85°C. Features • 4.5mA typical operating current • ...
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... MIC5156/5157/5158 Ordering Information MIC5156 Part Number Standard MIC5156-3.3BN MIC5156-5.0BN MIC5156BN MIC5156-3.3BM MIC5156-5.0BM MIC5156BM Ordering Information MIC5157 Part Number Standard MIC5157BN MIC5157BM Ordering Information MIC5158 Part Number Standard MIC5158BN MIC5158BM Pin Configuration MIC5156-x GND ...
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... MIC5156/5157/5158 Pin Description MIC5156 Pin Number Pin Name FLAG 3 GND (3.3V, 5V) 8 (adjustable) EA Pin Description MIC5157, MIC5158 Pin Number Pin Name 1 (MIC5157 (MIC5158 (MIC5157) 3.3V 2 (MIC5158 FLAG 4 GND C2– 7 C2+ 8 C1+ 9 C1– ...
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... LIM Short G (gate) to (S) source, Note 4 MIC5156-3.3 MIC5156-5.0 MIC5157, 3.3V pin to S pin (3.3V config.) MIC5157, 5V pin to S pin (5V config.) MIC5157 7V, (12V config.) DD MIC5158 pin to EA pin (5V config.) MIC5156 [adjustable] and MIC5158 5V < V < 15V ...
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... MIC5156/5157/5158 Typical Characteristics 3.3V Regulator Output Voltage vs. Temperature 3.34 3.33 3.32 3.31 3.30 3.29 3.28 3.27 3.26 -60 - 120 150 TEMPERATURE (°C) MIC5157/8 On-State Supply Current vs. Supply Voltage 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2 SUPPLY VOLTAGE (V) Charge-Pump Output Voltage vs. Supply Voltage SUPPLY VOLTAGE (V) Enable Threshold Voltage vs ...
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... MIC5156/5157/5158 Block Diagram MIC5156 12k +5V Input Switched 5V Load Block Diagram MIC5157 Oscillator MIC5156/5157/5158 +12V Input 0.1µ 1.235V Bandgap I LIMIT Reference Comparator V Error OU T Comparator Amp 75mV * fixed version only 3.3V = 17k 32k † adjustable version only ‡ ...
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... Super LDO Regulator Controllers. The MIC5157 and MIC5158 each have an internal charge pump which provides MOSFET gate drive voltage. The MIC5157 has a selectable fixed output of 3.3V, 5V, or 12V. The MIC5158 may be configured for a fixed 5V or adjustable output. Enable (EN) With at least 3 ...
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... MOSFET. It provides a constant load of about 1mA to the charge pump. The error amplifier output can swing to within Although the MIC5157/8 is designed to provide gate drive using its internal charge pump, an external gate drive sup- ply voltage can be applied When using an external CP ...
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... Fixed Configurations The MIC5156-3.3 and MIC5156-5.0 are preset for 3.3V and 5.0V respectively. The MIC5157 operates at 3.3V when the 3.3V pin is connected to the S (source) pin; 5.0V when the 5.0V pin is connected to the S pin; or 12V if the 3.3V and 5.0V pins are open. The MIC5158 operates at a fixed 5V (without an external resistive divider) if the 5V FB pin is connected to EA ...
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... MOSFET protects the MOSFET from overdrive during fault conditions. MIC5156/5157/5158 ) MIC5157 or MIC5158 is used and is shutdown for a given time, the charge pump reservoir V recharging the reservoir causes an unacceptable delay in the load reaching its operating voltage, do not use the EN pin for on/off control. Instead, use the MIC5158, hold EN high to keep the charge pump in continuous operation, and switch the MOSFET on or off by overriding the error amplifi ...
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... Figure 5. Battery Charger Concept August 2005 Uninterruptible Power Supply V IN The MIC5157 and two N-channel MOSFETs provide battery switching for uninterruptible power as shown in figure (6 Two MOSFETs are placed source-to-source to prevent cur- rent flow through their body diodes when switched off. The Super LDO regulator is continuously enabled to achieve fast battery switch-in ...
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MIC5156/5157/5158 Package Information 0.018 (0.57) MIC5156/5157/5158 PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 (0.952) 8-Pin DIP (N) 8-Pin SOIC (M) 12 Micrel, Inc. 0.255 (6.48) ...
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MIC5156/5157/5158 .235 (5.969) .215 (5.461) .160 MAX (4.064) .160 (4.064) .100 (2.540) 0.154 (3.90) 0.026 (0.65) MAX) 0.057 (1.45) 0.049 (1.25) MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by ...