MIC5247-1.8BM5 Micrel Inc, MIC5247-1.8BM5 Datasheet
MIC5247-1.8BM5
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MIC5247-1.8BM5 Summary of contents
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... Laptop, notebook, and palmtop computers • PCMCIA V • Consumer/personal electronics • SMPS post-regulator/dc-to-dc modules • High-efficiency linear power supplies Ordering Information Part Number Marking Voltage MIC5247-1.5BM5 LU15 MIC5247-1.8BM5 LU18 MIC5247-2.0BM5 LU20 MIC5247-2.4BM5 LU24 Other voltages available. Contact Micrel for details. MIC5247-x.xBM5 ...
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... LUxx 4 5 BYP OUT MIC5247-x.xBM5 Pin Function Supply Input Ground Enable/Shutdown (Input): CMOS compatible input. Logic high = enable; logic low = shutdown. Do not leave open. Reference Bypass: Connect external 0.01pF capacitor to GND to reduce output noise. May be left open. Regulator Output Operating Ratings ...
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... OUT 0.01 F, OUT BYP f = 10Hz to 100kHz V = 2.7V to 5.5V, regulator shutdown 2.7V to 5.5V, regulator enabled +125 C; unless noted. J Min Typical Max –1 1 –2 2 –0.3 +0 150 0 150 85 150 50 160 300 30 0.8 0.4 1.6 1 0.01 0.01 500 150 10 Micrel Units % % %/ Vrms MIC5247 ...
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... OUT Ceramic OUT 0 FREQUENCY (Hz) Ground Pin Current 100 100 A LOAD 0 -40 - 110 140 TEMPERATURE ( C) Ground Pin Current 100 150mA LOAD INPUT VOLTAGE (V) MIC5247 Power Supply Rejection Ratio 0. BYP I = 50mA 3. 2.4V 10 OUT C =10 F Ceramic OUT 0 FREQUENCY (Hz) Noise Performance -5 1x10 BYP -6 1x10 C = 0.01 F ...
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... MIC5247 Output Voltage vs. Temperature 2.5 2 100 A LOAD 2.3 -40 -10 20 TEMPERATURE ( C) November 6, 2000 200 150 100 110 140 5 Turn-On Time vs. Bypass Capacitance OUT I = 100mA LOAD Rise Time Prop Delay 0 BYPASS CAPACITOR ( F) Micrel MIC5247 ...
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... MIC5247 Functional Characteristics Load Transient Response TIME (100 s/div.) MIC5247 OUT BYP 2.4V OUT 100mA 100 A 6 Micrel Line Transient Response 4.4V 3. OUT V = 2.4V OUT I = 100 A LOAD TIME (500 s/div.) November 6, 2000 ...
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... MIC5247 Block Diagrams IN Reference Voltage EN Thermal Sensor Under- voltage Lockout GND November 6, 2000 Startup/ Quickstart/ Shutdown Noise Control Cancellation FAULT Error Current Amplifier Amplifier ACTIVE SHUTDOWN 7 Micrel BYP PULL UP OUT PULL DOWN MIC5247 ...
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... Typical Characteristics section for a graph of turn-on time vs. bypass capacitor. Transient Response The MIC5247 implements a unique output stage to dramati- cally improve transient response recovery time. The output is a totem-pole configuration with a P-channel MOSFET pass device and an N-channel MOSFET clamp. The N-channel ...
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... EN (pin 3) connected to IN (pin 1) for an applica- tion where enable/shutdown is not required. C minimum. November 6, 2000 = 1 F OUT Enable Shutdown Figure 2. Low-Noise Fixed Voltage Application Figure example of a low-noise configuration where C is not required. C BYP 9 Micrel MIC5247-x.xBM5 OUT 1.0µ minimum. OUT MIC5247 ...
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... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC5247 1.75 (0.069) 3 ...