LP28057A – 00

Jan.-2019

www.lowpowersemi.com

Page 4 of 7

Preliminary Datasheet

LP28057A

Electrical Characteristics

(The specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 5V,

unless otherwise noted.)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP.

MAX

UNITS

VIN

Adapter/USB Voltage Range

4.5

5

6.5

V

Input Supply Current

Standby Mode (Charge Terminated)

50

uA

Regulated Output (Float) Voltage

4.158

4.2

4.242

V

BAT Pin Current

RISET = 1k

1000

mA

RISET = 2k

500

Reverse Current, VBAT=-4.2V

1

Standby Mode, VBAT = 4.2V

Shutdown Mode (RISET NC)

1

uA

Trickle Charge Current

VBAT < VTRIKL

10

%IBAT

Trickle Charge Threshold Voltage

RISET = 10k, VBAT Rising

2.9

V

Trickle Charge Hysteresis Voltage

RISET = 10k

100

mV

VIN Under voltage Lockout Threshold

From VIN Low to High

3.8

V

VIN Under voltage Lockout Hysteresis

200

mV

VIN –VBAT Lockout Threshold Voltage

VIN from Low to High

150

mV

Termination Current Threshold

RISET = 10k

10

%IBAT

RISET = 2k

ISET Pin Voltage

RISET = 10k, Current Mode

1.0

V

STAT Pin Output Low Voltage

ISTAT = 5mA

0.5

V

STAT1/2 Pin Weak Pull-Down Current

5

uA

Recharge Battery Threshold Voltage

VFLOAT - VRESTAT

200

mV

Junction Temperature in Constant Temperature Mode

125

°C

Power FET “ON” Resistance (Between VIN and BAT)

600

mΩ

EN Logic-High Voltage Threshold

1.4

V

EN Logic-Low Voltage Threshold

0.4

V