MIC2544-1 MICREL [Micrel Semiconductor], MIC2544-1 Datasheet
MIC2544-1
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MIC2544-1 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 MIC2548. The MIC2544 and MIC2548 are available in active-high and active-low enable versions in the 8-pin SOP (small-outline package) and 8-pin MSOP (micro-small-outline package). ...
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... MIC2544/2548 Ordering Information Part Number MIC2544-1BM MIC2544-1BMM MIC2544-2BM MIC2544-2BMM MIC2548-1BM MIC2548-1BMM MIC2548-2BM MIC2548-2BMM * Thermal Shutdown Latch Pin Configuration MIC2544/2548 EN 1 FLG 2 GND 3 ILIM 4 8-Pin SOP (M) Pin Description Pin Number Pin Number Pin Name MSOP-8 SOP 6,8 6 MIC2544/2548 ...
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... Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Off is ≤ 0.8V and on is ≥ 2.4V for the MIC2544-1 and MIC2548-1. Off is ≥ 2.4V and on is ≤ 0.8V for the MIC2544-2 and MIC2548-2. The Note 4. enable input has about 200mV of hysteresis. ...
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... MIC2544/2548 Test Circuit V OUT Timing Diagrams OUT OUT MIC2544/2548 I Device OUT Under OUT Test 90% 90% 10% Functional Characteristics Test Circuit 50% t OFF t ON 90% Figure 1a. MIC2544/48-1 50% t OFF t ON 90% Figure 1b. MIC2544/48 OUT t f 10% 10% 10% Micrel June 2000 ...
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... EN V OUT I LIMIT OUT FLG Figure 2a. MIC2548-2 Timing: Output is reset by toggling OUT I LIMIT OUT FLG June 2000 Short-Circuit Fault Thermal Shutdown Reached Short-Circuit Fault Fault Removed Thermal Shutdown Reached Figure 2b. MIC2544-2 Timing 5 Output Reset Fault Removed MIC2544/2548 Micrel ...
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... 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 44Ω L 2.7V 2.0 1.5 3.3V 1.0 5.0V 0.5 0 -40 - 100 TEMPERATURE (°C) MIC2544/2548 Output On-Resistance vs. Temperature 120 100 2.7V 3. -40 - 100 TEMPERATURE (°C) Off-State Supply Current vs. Temperature 0 44Ω L 0.3 5.0V 0.2 3.3V 0.1 2.7V 0 -40 - 100 TEMPERATURE (°C) Enable Threshold Voltage vs ...
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... June 2000 Current Limit vs. Temperature 1100 I TH 1000 I SET 900 = 230Ω 800 I SHORT 700 600 100 TEMPERATURE (°C) 7 Current Limit vs. Supply Voltage SET T = 27° 230Ω SHORT 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) Micrel MIC2544/2548 ...
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... IN L TIME (1ms/div.) Enable Into Heavy Load SET C = 4.7µ 1Ω MIC2544-1 TIME (100ms/div.) Inrush Current Response 4.7µ 10Ω 110µ 60µ 10µF L MIC2544-1 TIME (500µs/div.) Micrel June 2000 ...
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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 MIC2544/48 avoids undesirable current flow from OUT to IN. Both OUT pins must be connected together. ...
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... MIC2544/48 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. Figure 5 shows how the MIC2544 may be used in a hot-plug application. 10k 100k 3 ...
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... Receptacle GND June 2000 MIC2544-2BM OUT 2 7 FLG IN 0.1 µ GND OUT LIM C 0.1µF Adaptor Card NOTE: MSOP PACKAGE OPTION USES PIN 5 FOR I LIM AND PIN CONNECT (NC). Figure 5. Hot Plug Application 11 Backend Function BULK MIC2544/2548 Micrel ...
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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. MIC2544/2548 MAX) PIN 1 ...