Micrel, Inc.

MIC79110

October 2007

2

M9999-102507

Ordering Information

Part Number

Standard

Marking

Pb-Free

Marking

Voltage

Junction

Temp. Range

Package

MIC79110-4.2BML

L942

MIC79110-4.2YML

L942*

4.2V

–40° to +125°C

10-pin 3×3 MLF

®

MIC79110BML

L9AA

MIC79110YML

L9AA*

Adj.

–40° to +125°C

10-pin 3×3 MLF

®

* Pb-Free “Y” indicator is added to the device mark after LOGO.

Pin Configuration

5

1

SD

SNS

BAT

10 GND

9

8

7

2

3

4

6

5

1

SD

ADJ

BAT

10 GND

9

8

7

2

3

4

6

Fixed Output

10-Pin 3mm × 3mm MLF

Adjustable Output

10-Pin 3mm × 3mm MLF

Pin Description

Pin Number

Pin Name

Pin Function

1

SD

Shutdown Input. Logic High = Off; Logic Low = On.

2

RSET

Current limit: Sets constant current limit via an external resistor to ground.

3

SNS

(Fixed voltage only): Sense output, connect directly to battery.

3

ADJ

(Adjustable voltage only): Feedback input.

4

BAT

Battery Terminal. Connect to single-cell lithium-ion battery.

5, 6

VIN

Input supply pin.

7

ACHG

Analog Charge Indicator Output: Current source who’s output current is equal to

1/1000 of the BAT pin current.

8

DEOC

Digital End-of-Charge Output: N-Ch open drain output. Low indicates charging,

goes high impedance, indicating end-of-charge.

9

REOC

End-of-Charge Set: Sets end-of-charge current threshold via an external resistor

10

GND

Ground