APL3207 datasheet(9/19 Pages) ANPEC

9 / 19 page

Rev. A.3 - Sep., 2012

APL3207

www.anpec.com.tw

Operating Waveforms (Cont.)

Pin Description

NO.

NAME

FUNCTION

VIN

Charger Input Supply Pin. Provides power to the charger, VIN can range from 4.35V to 6.5V and should

be bypassed with at least a 1

µF capacitor.

BATT

Charger Output Pin. Connect this pin to the positive terminal of a Li+ battery.

LDOIN

LDO Regulator Input Supply Pin. Provides power to the regulator, VLDOIN can range from 3.6V to 6.5V

and should be bypassed with at least a 1

µF capacitor.

No Connection.

6,7

LDOOUT

LDO Regulator Output. Fixed at 3.3V output, sourcing up to 150mA. The pin6 and pin7 must be

connected together.

STAT

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

internal switch. In other states the STAT pin is in a high impedance state.

3,9

GND

Ground. Pin3 and pin9 must be connected together.

ISET

Charging Current Setting and Shutdown Pin. Connecting a resistor from this pin to GND set the charge

current when the VIN is powering the charger. Disconnecting the RSET from GND allows an internal

2.5

µA current to pull the ISET pin high, and when the ISET pin voltage exceeds the shutdown

threshold voltage, the charger enters shutdown mode.

Bottom

Pad

GND

Ground. Connect the bottom side metal pad to back side ground plane through several vias to improve

power dissipation.

(Refer to the section “Typical Application Circuits”, the test condition is V

LDOIN=5V, TA=25

oC, unless otherwise specified)

CH1: V

LDOOUT, 50mV/div, AC

CH3: I

LDO, 50mA/div, DC

TIME: 0.5ms/div

LDOIN = 5V

LDO Load Transient Response

LDOOUT

LDO=1mA to 150mA

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