Preliminary Datasheet

LP78090

LP78090 – 00

Version 1.0

Feb.-2014

www.lowpowersemi.com

Page 2 of 10

Functional Pin Description

P a c k a ge Ty pe

P i n C o n fi gur a ti ons

TDFN-10

Pin Description

PIN No.

PIN

DESCRIPTION

1,3

SYS

Output of power supply for system.

2,5

VIN

Power supply input for system and charge.

4,6

BAT

BAT is the connection to the battery. Typically a 10µF Tantalum capacitor is needed for stability

when there is no battery attached. When a battery is attached, only a 0.1µF ceramic capacitor is

required.

7

CHRG

Open-Drain Charge Status Output. When the battery is charging, the STAT pin is pulled low by

an internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled High.

8

STDBY

Open-Drain Complete Status Output. When the battery is charging, the STAT pin is pulled high

by an internal N-channel MOSFET. When the charge cycle is completed, the pin is pulled Low.

9

ISET

Charge Current Program, Charge Current Monitor and Shutdown Pin. The charge current is

programmed by connecting a 1% resistor(R

mode, this pin servos to 2V. In all modes, the voltage on this pin can be used to measure the

10

SC

Smart controller.

11

GND

Ground pin.