LTC4088EDE-PBF 데이터 시트보기 (PDF) - Linear Technology

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LTC4088EDE-PBF

High Efficiency Battery Charger/USB Power Manager

Linear Technology 

LTC4088

Electrical Characteristics The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, RCLPROG = 2.94k, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

IOUT

VOUT Current Available Before

1x Mode, BAT = 3.3V

Discharging Battery

5x Mode, BAT = 3.3V

10x Mode, BAT = 3.3V

Low Power Suspend Mode

High Power Suspend Mode

135

mA

672

mA

1251

mA

0.26

0.32

0.41

mA

1.6

2.04

2.46

mA

VCLPROG

CLPROG Servo Voltage in Current Limit 1x, 5x, 10x Modes

Suspend Modes

1.188

V

100

mV

VUVLO

VBUS Undervoltage Lockout

Rising Threshold

Falling Threshold

4.30

4.35

V

3.95

4.00

V

VDUVLO

VBUS to BAT Differential Undervoltage Rising Threshold

Lockout

Falling Threshold

200

mV

50

mV

VOUT

fOSC

RPMOS

RNMOS

VOUT Voltage

Switching Frequency

PMOS On Resistance

NMOS On Resistance

1x, 5x, 10x Modes, 0V < BAT ≤ 4.2V,

IOUT = 0mA, Battery Charger Off

USB Suspend Modes, IOUT = 250µA

3.5 BAT + 0.3 4.7

V

4.5

4.6

4.7

V

1.8

2.25

2.7

MHz

0.18

Ω

0.30

Ω

IPEAK

Peak Inductor Current Clamp

1x, 5x Modes

10x Mode

2

A

3

A

RSUSP

Suspend LDO Output Resistance

15

Ω

Battery Charger

VFLOAT

ICHG

IBAT

BAT Regulated Output Voltage

0°C ≤ TA ≤ 85°C

4.179

4.200

4.221

V

4.165

4.200

4.235

V

Constant-Current Mode Charge Current RPROG = 1k

RPROG = 5k

980

1030

1080

mA

192

206

220

mA

Battery Drain Current

VBUS > VUVLO, PowerPath Switching

Regulator On, Battery Charger Off,

IOUT = 0µA

3.5

5

µA

VBUS = 0V, IOUT = 0µA (Ideal Diode Mode)

23

35

µA

VPROG

VPROG,TRKL

PROG Pin Servo Voltage

PROG Pin Servo Voltage in Trickle

Charge

BAT < VTRKL

1.000

V

0.100

V

hPROG

VTRKL

Ratio of IBAT to PROG Pin Current

Trickle Charge Threshold Voltage

BAT Rising

1031

mA/mA

2.7

2.85

3.0

V

ΔVTRKL

Trickle Charge Hysteresis Voltage

135

mV

VRECHRG

tTERM

tBADBAT

IC/X

VC/X

Recharge Battery Threshold Voltage

Safety Timer Termination Period

Bad Battery Termination Time

Battery Charge Current at Programmed

End of Charge Indication

C/X Threshold Voltage

Threshold Voltage Relative to VFLOAT

Timer Starts when VBAT = VFLOAT

BAT < VTRKL

RC/X = 1k

RC/X = 5k

–80

–100

–120

mV

3.2

4.0

4.8

Hour

0.4

0.5

0.6

Hour

85

100

115

mA

20

mA

100

mV

hC/X

Battery Charge Current Ratio to C/X

1031

mA/mA

VCHRG

ICHRG

CHRG Pin Output Low Voltage

CHRG Pin Input Current

ICHRG = 5mA

BAT = 4.5V, VCHRG = 5V

65

100

mV

0

1

µA

4088fb

3

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