MIC79110_13 Datasheet, PDF (2/16 Pages) Micrel Semiconductor – Simple 1.2A Linear Li-ion Battery Charger

Micrel, Inc.
Ordering Information
Part Number
Marking
Code⁽¹⁾
Voltage
MIC79110-4.2YML
L942
4.2V
MIC79110YML
L9AA
Adjustable
1. Pb-Free “Y” indicator is added to the device mark after logo.
Pin Configuration
Junction Temperature Range
–40° to +125°C
–40° to +125°C
MIC79110
Package
10-Pin 3mm × 3mm DFN
10-Pin 3mm × 3mm DFN
Fixed Output
10-Pin 3mm × 3mm DFN (ML)
Adjustable Output
10-Pin 3mm × 3mm DFN (ML)
Pin Description
Pin Number
1
Pin Name
SD
2
RSET
3
SNS
3
ADJ
4
BAT
5, 6
VIN
7
ACHG
8
DEOC
9
REOC
10
GND
Pin Function
Shutdown Input. Logic HIGH = Off; Logic LOW = On.
Current limit: Sets constant current limit via an external resistor to ground.
IRSET = (0.2V/RSET) × 1000.
(Fixed voltage only): Sense output, connect directly to battery.
(Adjustable voltage only): Feedback input.
Battery Terminal. Connect to single-cell lithium-ion battery.
Input supply pin.
Analog Charge Indicator Output: Current source who’s output current is equal to 1/1000 of the
BAT pin current.
Digital End-of-Charge Output: N-Channel open-drain output. LOW indicates charging, a current
that is higher than the programmed current set by REOC is charging the battery. When the current
drops to less than the current set by REOC, the output goes high impedance, indicating end-of-
charge.
End-of-Charge Set: Sets end-of-charge current threshold via an external resistor to ground.
IEOC = (0.2V/ REOC) × 1000.
Ground
September 23, 2013
2
Revision 2.1