Micrel

MIC2589/MIC2595

December 2005

2

M9999-120505

(408) 955-1690

Typical Applications

114

13

5

4

3

2

Nominal Undervoltage and Overvoltage Thresholds:

V

V

Overcurrent TImer Delay

t

*Optional components (See Funtional Description and Applications Information for more details)

#An external pull-up resistor for the power-good signal is necessary for DC-DC convertors (and all other load modules) not equipped with an

internal pull-up impedance

/PWRGD1

CFILTER

CNLD

VEE

/PWRGD3

PGTIMER

GATE

/PWRGD2

SENSE

VDD

OUT+

OUT–

IN+

+5V RTN

+2.5V RTN

+1.8V RTN

-48V RTN

IN–

ON/OFF*

0.068µF

R2

11.8k

1%

R3

12.4k

1%

2.2µF

0.068µF

*C2

0.1µF

0.01

5%

M1

SUM110N10-09

R4

10

C1

0.47µF

*D1

SMAT70A

-48V RTN

(Long Pin)

-48V RTN

(Long Pin)

-48V RTN

(Short Pin)

UV

MIC2589-2BM

DRAIN

OV

8

7

6

12

10

11

9

N/C

R1

689k

1%

C3

0.1µF

C4

100µF

C5

0.1µF

OUT+

OUT–

IN+

IN–

ON/OFF*

C6

100µF

C7

0.1µF

OUT+

OUT–

IN+

IN–

ON/OFF*

C8

100µF

~