Micrel, Inc.

MIC3385

May 2010

2

M9999-051310-B

Ordering Information

Part Number

Voltage

Temperature Range

Package

Lead Finish

MIC3385YHL

Adj.

–40° to +125°C

14-Pin 3mm x 3.5mm MLF

®

Pb-free

MIC3385-1.5YHL

1.5V

–40° to +125°C

14-Pin 3mm x 3.5mm MLF

®

Pb-free

Notes:

1.

MLF® is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

2.

Other voltage options available. Please contact Micrel for details.

Pin Configuration

OUT

SW

7

3

LOWQ

EN

OUT

OUT

12 AVIN

GND

SW

SW

11

10

9

4

5

6

8

1

FB

VIN

14 BIAS

LDO

13

2

14- Pin 3mm x 3.5mm MLF

Pin Description

Pin Number

Pin Name

Pin Function

1

FB

Feedback. Input to the error amplifier. Connect to the external resistor divider network to set

the output voltage.

2

VIN

Supply Voltage (Input): Supply voltage for the internal switches and drivers.

3

LOWQ

Enable LDO Mode (Input): Logic low enables the internal LDO and disables the PWM

operation. Logic high enables the PWM mode and disables the LDO mode.

4

EN

Enable (Input). Logic low will shut down the device, reducing the quiescent current to less

than 5

μA.

5,6,7

OUT

Switch Output after inductor.

8,9,10

SW

Switch (Output): Internal power MOSFET output switches before Inductor

11

GND

Power Ground. Requires input capacitor to GND.

12

AVIN

Analog Supply Voltage (Input): Supply voltage for the analog control circuitry and LDO input

power. Requires bypass capacitor to GND.

13

LDO

14

BIAS

Internal circuit bias supply. Must be de-coupled to signal ground with a 0.1

μF capacitor and

should not be loaded.