Micrel, Inc.

MIC22600

September 2007

2

M9999-092007-A

Ordering Information

Part Number

Voltage

Junction Temp. Range

Package

Lead Finish

MIC22600YML

Adj.

–40° to +125°C

24-Pin 4x4 MLF

®

Pb-Free

Pin Configuration

PVIN

EN

DELAY

RC

POR/PG

PVIN

PVIN

SVIN

SGND

COMP

FB

PVIN

24-Pin 4mm x 4mm MLF (ML)

Pin Description

Pin Number

Pin Name

Description

1, 6, 13, 18

PVIN

Power Supply Voltage (Input): Requires bypass capacitor to GND.

17

SVIN

Signal Power Supply Voltage (Input): Requires bypass capacitor to GND.

2

EN

Enable/Delay (Input): This pin has a 1.2x band gap reference. When the pin is

pulled higher that this the part will start up. Below this voltage the device is in its

low quiescent current mode. The pin has a 1µA current source charging it to VIN.

By adding a capacitor to this pin a delay may easily be generated. The enable

function will not operate with an input voltage lower than the min specified.

4

RC

Ramp Control: Capacitor to ground from this pin determines slew rate of output

voltage during start-up. This can be used for tracking capability as well as soft

start.

14

FB

Feedback: Input to the error amplifier, connect to the external resistor divider

network to set the output voltage.

15

COMP

Compensation pin (Input): Place a RC to GND to compensate the device, see

applications section.

5

POR/PG

Power On Reset (Output): Open-drain output device indicates when the output is

out of regulation and is active after the delay set by the delay pin.

7, 12, 19, 24

PGND

Power Ground (Signal): Ground

16

SGND

Signal Ground (Signal): Ground

3

DELAY

Delay (Input): Capacitor to ground sets internal delay timer. Timer delays power-

on reset (POR) output at turn-on and ramp down at turn-off.

8, 9, 10, 11,

20, 21, 22, 23

SW

Switch (Output): Internal power MOSFET output switches.

EP

GND

Exposed Pad (Power): Must make a full connection to a GND plane for full output

power to be realized.