Micrel, Inc.

MIC5312

February 2005

2

M9999-021105

(408) 955-1690

Ordering Information

Part Number

Output

Voltage*

Junction Temp. Range

Package

MIC5312-GMBML

1.8V/2.8V

–40°C to +125°C

10-Pin 3×3 MLF™

MIC5312-DKBML

1.85V/2.6V

–40°C to +125°C

10-Pin 3×3 MLF™

Note:

*Other Voltage options available between 1.25V and 5V. Contact Micrel for details.

Pin Configuration

1

EN1

EN2

LOWQ

BYP

POR

SET

GND

9

8

7

6

2

3

4

5

MIC5312-xxBML (3x3)

Pin Description

Fixed

Pin Name

Pin Function

1

2

EN1

Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating

3

EN2

Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating

4

LowQ™

LowQ™ Mode. Active Low Input. Logic High = Full Power Mode; Logic Low = Light

Load Mode; Do not leave floating.

5

BYP

Reference Bypass: Connect external 0.01µF to GND to reduce output noise. May

be left open.

6

GND

Ground.

7

SET

Delay Set Input: Connect external capacitor to GND to set the internal delay for the

POR output. When left open, there is no delay. This pin cannot be grounded. Delay

= 1µs/1pF

8

POR

Power-On Reset Output: Open-drain output. Active low indicates an output

undervoltage condition on either regulator 1 or regulator 2 when device is enabled.

9

Output of regulator 2

10

Output of regulator 1

EP

GND

Ground. Internally connected to the Exposed Pad.