MIC2150 datasheet(2/27 Pages) MICREL

2 / 27 page

Micrel, Inc.

MIC2150

August 2009

M9999-082809-A

(408) 944-0800

Ordering Information

Part Number

Frequency

Voltage

Junction Temp.

Range

Lead Finish

Package

MIC2150YML

500kHz

Adj.

–40

°C to +125°C

Pb-Free

4mm×4mm 24-pin MLF

MIC2151YML

300kHz

Adj.

–40

°C to +125°C

Pb-Free

4mm×4mm 24-pin MLF

Pin Configuration

24-Pin MLF

® (ML)

Pin Description

Pin Number

Pin Name

Pin Function

BS1

Boost 1(Input): Provides voltage for high-side MOSFET driver 1. The gate drive

voltage is higher than the source voltage by VDD minus a diode drop.

HSD1

High-Side Drive 1 (Output): High current output-driver for ext. high-side

MOSFET.

SW1

Switch Node 1(Output): High current output driver return for HSD1.

CS1

Current Sense 1 (Input): Current-limit comparator non-inverting input. The

current limit is sensed across the low-side FET during the ON-time. Current limit

is set by the resistor in series with the CS1 pin.

SS1

Soft-start, Output 1(Input): Controls the turn-on time of the output voltage. Active

at power-up, Enable and Current Limit recovery.

COMP1

Compensation 1 (Input): Pin for external compensation, Channel 1.

AGND

Analog Ground (Signal): Signal path return for FB, EN, PGOOD, AVDD, SS and

COMP.

FB1

Feedback 1 (Input): Input to Channel 1 error amplifier. Regulates to 0.7V.

AVDD

Analog Supply Voltage (Input): Connect ext. bypass capacitor.

FB2

Feedback 2 (Input): Input to Channel 2 error amplifier. Regulates to 0.7V.

PGOOD

Power Good (Output): Indicates Channel 1 output AND Channel 2 output > 90%

Nominal.

COMP2

Compensation 2 (Input): Pin for external compensation, Channel 2.

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