Micrel, Inc.

MIC2101/02

November 13, 2013

2

Revision 2.0

Ordering Information

Part Number

Switching

Frequency

Features

Package

Junction

Temperature

Range

Lead Finish

MIC2101YML

200kHz to 600kHz

Hyper Light Load

16-Pin 3mm x 3mm QFN

–40°C to +125°C

Pb-Free

MIC2102YML

200kHz to 600kHz

Hyper Speed Control

16-Pin 3mm x 3mm QFN

–40°C to +125°C

Pb-Free

Pin Configuration

16-Pin 3mm x 3mm QFN (ML)

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

1VDD

Internal +5V Linear Regulator

ceramic capacitor from VDD to AGND is required for decoupling. In the applications with VIN <

+5.5V, VDD should be tied to VIN to by-pass the linear regulator.

2

PVDD

5V supply input for the low-side N-channel MOSFET driver, which can be tied to VDD externally.

3ILIM

Current Limit Setting. Connect a resistor from SW to ILIM to set the over-current threshold for the

converter.

4DL

Low-Side Drive output. High-current driver output for external low-side MOSFET of a buck

converter. The DL driving voltage swings from ground to VDD. Adding a small resistor between

DL pin and the gate of the low-side N-channel MOSFET can slow down the turn-on and turn-off

speed of the MOSFET.

5PGND

Power Ground. PGND is the return path for the buck converter power stage. The PGND pin

connects to the sources of low-side N-Channel external MOSFET, the negative terminals of input

capacitors, and the negative terminals of output capacitors. The return path for the power ground

should be as small as possible and separate from the signal ground (AGND) return path.

6FREQ

Switching Frequency Adjust input. Tie this pin to VIN to operate at 600kHz and place a resistor

divider to reduce the frequency.