LTC4088EDE-2 データシートの表示（PDF） - Linear Technology

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LTC4088EDE-2

High Efficiency Battery Charger/USB Power Manager with Regulated Output Voltage

Linear Technology 

LTC4088-1/LTC4088-2

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

VOUT Voltage

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

fOSC

RPMOS

RNMOS

Switching Frequency

PMOS On Resistance

NMOS On Resistance

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

196

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

ΔVTRKL

VRECHRG

Ratio of IBAT to PROG Pin Current

Trickle Charge Threshold Voltage

Trickle Charge Hysteresis Voltage

Recharge Battery Threshold Voltage

BAT Rising

Threshold Voltage Relative to VFLOAT

1031

mA/mA

2.7

2.85

3.0

V

135

mV

–80

–100

–120

mV

tTERM

tBADBAT

IC/X

VC/X

Safety Timer Termination Period

Bad Battery Termination Time

Battery Charge Current at Programmed

End of Charge Indication

C/X Threshold Voltage

Timer Starts When VBAT = VFLOAT

BAT < VTRKL

RC/X = 1k

RC/X = 5k

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

40881fc

3

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