Micrel, Inc.

MIC24085

October 22, 2013

2

Revision 1.1

Ordering Information

Part Number

Output Voltage

Junction Temperature Range

Package

Lead Finish

MIC24085AYML

ADJ

–40°C to +125°C

16-Pin 3mm x 3mm QFN

Pb-Free

MIC24085BYML

1.5V

MIC24085CYML

1.8V

MIC24085DYML

2.5V

MIC24085EYML

3.3V

MIC24085FYML

5V

Pin Configuration

16-Pin 3mm × 3mm QFN (ML)

(Top View)

Pin Description

Pin Number

Pin Name

Pin Function

1, 12, 13, 16

SW

Switch Node (Output): Power stage output. Connect an inductor to this pin.

2, 3, 11

VCC

Supply Voltage (for control circuit and power stage): A ceramic input capacitor between VCC and

the power ground (PGND) is required.

4

GND

Analog Ground: GND is the ground path of the control circuitry.

5

FB

Feedback (Input): Input to the error amplifier of the PWM controller. The FB pin is regulated to

0.9V. A resistor divider connecting the feedback to the output is used to adjust the desired output

voltage.

6, 7

NC

No connection.

8

PG

Power Good (Output): Open drain output, which needs a pull-up. The PG pin turns logic high when

the converter output voltage is regulated in the range from 93% to 103% of the setting.

9

EN

Enable (Input): An accurate Enable with hysteresis is provided. High = enable, Low = shutdown.

Enable has an internal pull-up to ensure a stable state if this pin is not connected.

10

BST

Boost (Output): Bootstrapped voltage to the high-side N-channel MOSFET. A boost capacitor of

0.1μF is connected between the BST pin and the SW pin.

14,15

PGND

Power Ground: PGND is the ground path for the power stage.

EP

ePAD

Exposed Pad. It must be connected to PGND on the PCB.