MIC2545A-2YTS Micrel Inc, MIC2545A-2YTS Datasheet
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MIC2545A-2YTS
Specifications of MIC2545A-2YTS
MIC2545A-2YTS
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MIC2545A-2YTS Summary of contents
Page 1
... Thermal shutdown, along with adjustable current- limit, protects the switch and the attached device. The MIC2545A/49A’s open-drain flag output is used to indi- cate current-limiting or thermal shutdown to a local controller. The MIC2549A has an additional internal latch which turns the output off upon thermal shutdown, providing robust fault control ...
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... Active Low MIC2545A-2BTS Active Low MIC2545A-1YM Active High MIC2545A-1YN Active High MIC2545A-1YTS Active High MIC2545A-2YM Active Low MIC2545A-2YN Active Low MIC2545A-2YTS Active Low MIC2549A-1BM Active High MIC2549A-1BN Active High MIC2549A-1BTS Active High MIC2549A-2BM Active Low MIC2549A-2BN Active Low MIC2549A-2BTS Active Low ...
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... MIC2545A/2549A Pin Description Pin Number Pin Number Pin Name SOP, DIP TSSOP 10, 14 2,4,6,9,11,13 April 2004 Pin Function EN Enable (Input): Logic-compatible enable input (-1 version is active high, -2 version is active low). High input >1.8V typical; low input <1.4V typical. Do not float. MIC2549A only: Also resets thermal shutdown latch. ...
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... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 4. Assumes 4 layer PCB is used Current limit is determined by: LIMIT 6. Off is 0.8V and on is 2.4V for the MIC2545A-1 and MIC2549A-1. Off is enable input has about 100mV of hysteresis. 7. Guaranteed by design but not production tested. M9999-041204 Operating Ratings (1) Supply Voltage (V ...
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... MIC2545A/2549A Test Circuit V OUT Timing Diagrams OUT OUT April 2004 I Device OUT Under OUT Test 90% 90% 10% Functional Characteristics Test Circuit 50% t OFF t ON 90% Figure 1a. MIC2545A/49A-2 50% t OFF t ON 90% Figure 1b. MIC2545A/49A Figure 1c. Input-to-Enable Setup Timing 5 V OUT t f 10% 10% 10% M9999-041204 Micrel ...
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... MIC2545A/2549A EN V OUT I LIMIT OUT FLG Figure 2a. MIC2549A-2 Timing: Output Is Reset By Toggling OUT I LIMIT OUT FLG M9999-041204 Short-Circuit Fault Thermal Shutdown Reached Short-Circuit Fault Fault Removed Thermal Shutdown Reached Figure 2b. MIC2545A-2 Timing 6 Output Reset Fault Removed April 2004 Micrel ...
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... MIC2545A/2549A Typical Characteristics Output On-Resistance vs. Supply Voltage 2.5 3.0 3.5 4.0 4.5 5.0 5.5 SUPPLY VOLTAGE (V) On-State Supply Current vs. Temperature 140 120 100 5.0V 80 3. -40 - 100 TEMPERATURE ( C) Control Threshold Voltage vs. Supply Voltage 2.0 1 1.8 1.7 1.6 HIGH 1.5 1.4 1.3 LOW 1 ...
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... MIC2545A/2549A Typical Characteristics cont’d 1500 1400 1300 1200 1100 1000 900 800 700 600 500 -40 -20 M9999-041204 Current Limit vs. Temperature 1200 1100 R = 230 SET I TH 1000 I 900 SET 800 I SHORT 700 600 100 TEMPERATURE ( C) 8 Current Limit vs. Supply Voltage I TH ...
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... TIME (100ms/div.) April 2004 100 240 9 Turn-Off Response 100 10‰ L 500mA MIC2545A-1 TIME (1ms/div.) Short-Circuit Response Short Circuit Current-Limit Threshold 1.12A Short-Circuit Current 820mA (I ) SHORT Thermal V Shutdown MIC2545A-1 TIME (100ms/div.) Inrush Current Response 490 130 MIC2545A-1 TIME (500 s/div.) Micrel = 5V IN M9999-041204 ...
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... MIC2545A/2549A Functional Characteristics cont’d M9999-041204 Thermal Shutdown (Output Reset by Toggling Enable—MIC2549-1) Ramped Load to a Short Output Reset Output Latched Thermal Shutdown TIME (100ms/div.) 10 Micrel April 2004 ...
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... MIC2545A/2549A Block Diagram EN OSC. CHARGE PUMP RESET April 2004 THERMAL SHUTDOWN REFERENCE GATE CONTROL THERMAL SHUTDOWN LATCH (MIC2549A) GND 11 IN 1.2V IN ILIM CURRENT LIMIT R SET OUT OUT FLG M9999-041204 Micrel ...
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... The current-limit circuit prevents damage SET to the output MOSFET and external load. M9999-041204 The current-limit response of the MIC2545A/49A is based on the type of load that is applied to the output and is defined in three parts: 1. The first mode of operation is where the device enters a constant-current mode preventing further increases in output current ...
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... MIC2545A/49A 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 MIC2545A may be used in a hot-plug application. 10k 3.3V USB Controller ...
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... MIC2545A/2549A "Hot" Receptacle GND M9999-041204 MIC2545A OUT 2 7 FLG IN 0.1 µ GND OUT LIM C 0.1µF Adaptor Card Figure 5. Hot-Plug Application 14 Backend Function BULK April 2004 Micrel ...
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... MIC2545A/2549A Package Information 0.018 (0.57) 0.026 (0.65) 0.157 (3.99) 0.150 (3.81) 0.064 (1.63) 0.045 (1.14) April 2004 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) MAX) ...
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... MIC2545A/2549A 0.65 BSC (0.026) MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL 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. ...