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MIC2044/2045

Micrel

MIC2044/2045

6

January 2005

Test Circuit

7, 11,

13, 16

8

2

3

5

4

15

9,12,14

1

6

*R

SET

*R

SET 

and C

SLEW

  use multiple values

 (See specific response plots)

*C

SLEW

C2

0.1

µ

F

10

MIC2044/45-xBTS

VBIAS

VIN

EN

/FAULT

UVLOIN

SLEW

VOUT

PGREF

PWRGD

ILIM

GND

R2

20k

R1

20k

R5

260k

R6

24k

C

LOAD

47

µ

F

V

OUT

I

LOAD

R7

20k

C3

10

µ

F

C1
0.1

µ

F

V

IN

V

DD

R3

75k

R4

68k

Summary of Contents for MIC2044

Page 1: ...Micrel s web site at www micrel com Typical Application 7 11 13 16 8 2 3 6 4 15 9 12 14 1 5 RSET 100W Note All VIN pins 7 11 13 16 must be externally tied together All VOUT pins 9 12 14 must be exter...

Page 2: ...5 14 13 12 11 10 9 2 3 4 5 6 7 8 MIC2044 MIC2045 16 Pin TSSOP TS Ordering Information Part Number Standard Pb Free Enable Circuit Breaker Package MIC2044 1BTS MIC2044 1YTS Active High 16 Pin TSSOP MIC...

Page 3: ...ified in the Electrical Characteristics table For the MIC2044 45 the continuous output current range is 1A to 6A 5 UVLOIN Undervoltage Lockout Adjust Input With this pin left open the UVLO threshold i...

Page 4: ...V VIH min 3 5 2 5 V VENHYST Enable Input Threshold Hysteresis 100 mV IEN Enable Input Current VEN 0V to 5 5V 1 01 1 A RDS ON Switch Resistance VIN VBIAS 3V 5V 20 30 m IOUT 500mA ILEAK Output Leakage...

Page 5: ...teed to function outside its operating rating Note 3 Devices are ESD sensitive Handling precautions recommended Human body model 1 5k in series with 100pF Note 4 Specification for packaged product onl...

Page 6: ...3 5 4 15 9 12 14 1 6 RSET RSET and CSLEW use multiple values See specific response plots CSLEW C2 0 1 F 10 MIC2044 45 xBTS VBIAS VIN EN FAULT UVLOIN SLEW VOUT PGREF PWRGD ILIM GND R2 20k R1 20k R5 260...

Page 7: ...VBIAS 3V VIN VBIAS 5 5V 20 25 30 35 40 45 50 40 20 0 20 40 60 80 100 T FLAG ms TEMPERATURE C Flag Response Delay vs Temperature TFLAG 3V TFLAG 5V 200 400 600 800 1000 1200 1400 1600 40 20 0 20 40 60 8...

Page 8: ...2045 TIME 5ms div V OUT 2V div FAULT 5V div EN 5V div VIN VBIAS 5 0V RLOAD toggles from 2 to OPEN CLOAD 47 F RSET 220 4 82V Latched Output Reset MIC2045 TIME 50ms div I OUT 200mA div V IN 1V div V OUT...

Page 9: ...tinued V OUT 1V div FAULT 5V div EN 5V div I OUT 500mA div VIN 5 0V RLOAD 5 CLOAD 47 F CSLEW 0 033 F RSET 220 Output Slew Response TIME 2 5ms div V OUT 2V div FAULT 5V div EN 5V div I OUT 1A div VIN V...

Page 10: ...UVLO 5 3x 1x VREF 230mV Current Limit Replica Amp VIN ILIM 6 VOUT 9 12 14 VBIAS 8 VIN 7 11 13 16 FAULT 3 GND 10 Gate Control UVLOIN 5 SLEW 4 EN 2 PGREF 15 Open Load Detect ILIM Delay 32ms PWRGD 1 Err...

Page 11: ...t to 1 45V if the UVLOIN pin is left open See Applications Information Programmable Current Limit The MIC2044 45 is designed to prevent damage to the external load by limiting the maximum amount of cu...

Page 12: ...ould do In this case a fault condition is deemed to be anytime the output current exceeds the current limit for more than the flag delay period nominally 32ms Once the output shuts off it remains off...

Page 13: ...upplied to VBIAS after accounting for the voltage drop across the diode Output Slew Rate Adjustment Theoutputslew ratefortheMIC2044 45canbesloweddown by the use of a capacitor 16V rating minimum 25V s...

Page 14: ...onsiderably The following list contains some useful suggestions for PCB layout design of the MIC2044 45 in order to prevent the die from overheating under normal operating conditions 1 Micrel Semicond...

Page 15: ...roducts are not designed or authorized for use as components in life support appliances devices or systems where malfunction of a product can reasonably be expected to result in personal injury Life s...

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