MIC79110

Micrel

MICxxxx/xxxx

Month 2003

Ordering Information

Part Number

Voltage

Marking

Junction Temp. Range

Package

MIC79110-4.2BML

4.2V

L942

–40°C to +125°C

10-lead 3mm × 3mm MLF™

MIC79110BML

ADJ

L9AA

–40°C to +125°C

10-lead 3mm × 3mm MLF™

Pin Configuration

Pin Description

Pin Number

Pin Name

Pin Function

1

SD

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

2R

SET

Current limit: Sets constant current limit threshold via an external resistor to

ground. IR

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

V

IN

Input supply pin.

7A

CHG

Analog Charge Indicator Output: Current source output equal to 1/1000th of

the output current.

8D

EOC

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

charging, a current that is higher than the programmed current set by R

EOC

is charging the battery. When the current drops to less than the current set

by R

9R

EOC

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

resistor to ground. I

10

GND

Ground

VIN

VIN

5

1

SD

RSET

SNS

BAT

10 GND

REOC

DEOC

ACHG

9

8

7

2

3

4

6

VIN

VIN

5

1

SD

RSET

ADJ

BAT

10 GND

REOC

DEOC

ACHG

9

8

7

2

3

4

6

3mm x 3mm Fixed Output

3mm x 3mm Adjustable Output