MIC2546 Micrel Semiconductor, MIC2546 Datasheet
MIC2546
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MIC2546 Summary of contents
Page 1
... The enable signal is compatible with both 3V and 5V logic, and is also used as the thermal shutdown latch reset for the MIC2547. The MIC2546 and MIC2547 are available in active-high and active-low enable versions in 16-pin TSSOP and SOP packages. Typical Application ...
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... MIC2546/2547 Ordering Information Part Number MIC2546-1BM MIC2546-1BTS MIC2546-2BM MIC2546-2BTS MIC2547-1BM MIC2547-1BTS MIC2547-2BM MIC2547-2BTS * Thermal Shutdown Latch Pin Configuration MIC2546/2547 INA 1 OUTA 2 ENA FLGA 5 GNDB 6 ILIMB 7 OUTB 8 16-Pin SOP (M) 16-Pin TSSOP (TS) Pin Description Pin Number Pin Name 1 INA 2, 16 OUTA 3 ENA ...
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... Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Note 4. Off is 0.8V and on is 2.4V for the MIC2546-1 and MIC2547-1. Off is enable input has about 200mV of hysteresis. Note 5. Guaranteed by design, but not production tested. Current limit threshold is determined by: I Note 6 ...
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... V FALLING EN 1.3 1.2 1.1 1.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) Output Fall Time vs. Temperature 2 2.0 2.7V 1.5 3.3V 1.0 5.0V 0.5 0 -40 - 100 TEMPERATURE ( C) MIC2546/2547 Output On-Resistance vs. Temperature 120 100 2.7V 3. -40 - 100 TEMPERATURE ( C) Off-State Supply Current vs. Temperature 0 0.7 L 0.6 0.5 5.0V 0.4 0.3 3.3V 0.2 0.1 2.7V 0 -40 - 100 TEMPERATURE ( C) Enable Threshold Voltage vs ...
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... I TH 1000 I SET 900 230 SET 800 I 700 SHORT 600 -40 - 100 TEMPERATURE ( C) June 2000 Current Limit vs. Supply Voltage 1100 I TH 1000 I SET 900 R = 230 L 800 I 700 SHORT 600 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) 5 Micrel MIC2546/2547 ...
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... 4 TIME (1ms/div.) Enable Into Heavy Load SET MIC2546-1 TIME (100ms/div.) Inrush Current Response 4 110 MIC2546-1 TIME (500 s/div.) Micrel June 2000 ...
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... MIC2546/2547 Test Circuit V OUT Timing Diagrams OUT OUT June 2000 I Device OUT Under OUT Test 90% 90% 10% Functional Characteristics Test Circuit 50% t OFF t ON 90% Figure 1a. MIC2546/47-1 50% t OFF t ON 90% Figure 1b. MIC2546/47 OUT t f 10% 10% 10% MIC2546/2547 Micrel ...
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... EN V OUT I LIMIT OUT FLG Figure 2a. MIC2547-2 Timing: Output is reset by toggling OUT I LIMIT OUT FLG MIC2546/2547 Short-Circuit Fault Thermal Shutdown Reached Short-Circuit Fault Fault Removed Thermal Shutdown Reached Figure 2b. MIC2546-2 Timing 8 Output Reset Fault Removed June 2000 Micrel ...
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... CHARGE PUMP RESET June 2000 THERMAL SHUTDOWN REFERENCE GATE CONTROL THERMAL SHUTDOWN LATCH (MIC2547) THERMAL SHUTDOWN REFERENCE GATE CONTROL THERMAL SHUTDOWN LATCH (MIC2547) GNDB GNDA 9 1.2V INA ILIMA CURRENT LIMIT R SETA OUTA FLGA 1.2V INB ILIMB CURRENT LIMIT R SETB OUTB FLGB MIC2546/2547 Micrel ...
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... The output MOSFET and driver circuitry are also designed to allow the MOSFET source to be externally forced to a higher voltage than the drain (V switch is disabled. In this situation, the MIC2546/47 avoids undesirable current flow from OUTX to INX. Both OUT pins for a given channel must be connected together. ...
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... Printed Circuit Board Hot-Plug The MIC2546/47 are ideal inrush current-limiters suitable for hot-plug applications. Due to the integrated charge pump, the MIC2546/47 presents a high impedance when off and slowly becomes a low impedance as it turns on. This “soft- start” feature effectively isolates power supplies from highly capacitive loads by reducing inrush current during hot-plug events ...
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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. MIC2546/2547 PIN 1 DIMENSIONS: INCHES (MM) 0 ...