MIC2111B datasheet(3/35 Pages) MICREL

3 / 35 page

Micrel, Inc.

MIC2111B

October 13, 2015

Revision 2.1

Ordering Information

Part Number

Switching

Frequency

Junction

Temperature

Range

Current-Sense

Gain

Power

Stage

Package

Lead

Finish

MIC2111BYMT

200kHz to 2MHz

−40°C to +125°C

30V/V

DrMOS

20-Pin

3mm × 3mm TQFN

Pb-Free

Pin Configuration

20-Pin 3mm × 3mm TQFN (MT)

(Top View)

Pin Description

Pin Number

I/O

Pin Name

SLOPE

Valley Current Mode: Slope compensation can be adjusted by adding a resistor from this pin to

VIN (input power supply).

Voltage Mode: Artificial ramp controlled by SLOPE resistor

Enable (Input): A logic signal to enable or disable the controller. The EN pin is CMOS

compatible. Logic high = enable, logic low = disable or shutdown. Do not leave floating.

SEL

Control-Mode Selection Pin: Connect this pin to AGND for valley current-mode operation.

Leave this pin open for voltage mode control operation.

OVP

Output OVP programming pin. Connect a resistive divider to set OVP.OVP pin has 0.6V

reference (see Functional Description for more details).

FREQ

Switching Frequency Adjust (Input): Connect a resistor from this pin to GND to set the

switching frequency.

Power Module Temperature Sense Pin. Connect resistor divider to program TJ. TJ comparator

has 0.6V reference (see Functional Description for more details).

Power Good (Output): Open drain output, an external resistor to VOUT is required for pull-up.

Soft-start pin for limiting inrush current. A resistor from this pin to ground sets the soft-start

time. If enabled, soft-stop time is same as soft-start. Contact factory for soft stop.

MIC2111B Datasheet(PDF) 3 Page - Micrel Semiconductor

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