Preliminary Datasheet

LP78073

LP78073 – 00 Version 1.0

Feb.-2014

www.lowpowersemi.com

Page 2 of 9

Functional Pin Description

Pa c k a g e Ty p e

Pi n C o n f i g u r a t i o n s

ESOP-8

4

3

2

1

5

6

7

8

LX

VOUT

FB

VIN

BAT

CHARGB

DB

GND

9

GND

Pin Description

PIN No.

PIN

DESCRIPTION

1

LX

Boost Output switching node. SW is the drain of the internal low-side N-Channel MOSFET and high-side

P-Channel MOSFET. Connect the inductor to LX to Complete the step-up converter.

2

VOUT

Output pin of boost.

3

FB

Boost Feedback pin. The pin voltage is 1.0V.

4

VIN

VIN is the input power source. Connect to a wall adapter.

5

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.

6

CHARGB

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

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

7

DB

Open-Drain boost load Status Output. When output of the boost is light, this pin is pulled low by an internal

N-channel MOSFET.

8,9

GND

GND is the connection to system ground.