LTC4099 查看數據表（PDF） - Linear Technology

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LTC4099

I2C Controlled USB Power Manager/Charger with Overvoltage Protection

Linear Technology 

LTC4099

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

erature range, otherwise specifications are at TA = 25°C. VBUS = 5V, BAT = 3.8V, DVCC = 3.3V, RPROG = 1.02k, RCLPROG = 3.01k, unless

otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

hCLPROG

(Note 4)

Ratio of Measured VBUS Current to

CLPROG Program Current

100mA Mode

500mA Mode

620mA Mode

790mA Mode

1A Mode

1.2A Mode

Low Power Suspend Mode

High Power Suspend Mode

220

mA/mA

1200

mA/mA

1540

mA/mA

1980

mA/mA

2420

mA/mA

3080

mA/mA

10.9

mA/mA

65

mA/mA

IVOUT

VOUT Current Available Before Discharging 100mA Mode, BAT = 3.3V

Battery

500mA Mode, BAT = 3.3V

620mA Mode, BAT = 3.3V

790mA Mode, BAT = 3.3V

1A Mode, BAT = 3.3V

1.2A Mode, BAT = 3.3V

Low Power Suspend Mode

High Power Suspend Mode

135

mA

672

mA

840

mA

1080

mA

1251

mA

1550

mA

0.23

0.30

0.41

mA

1.6

2.16

2.46

mA

VCLPROG

CLPROG Servo Voltage in Current Limit Switching Modes

Suspend Modes

1.18

V

102

mV

VUVLO

VBUS Undervoltage Lockout

Rising Threshold

Falling Threshold

4.30

4.35

V

3.90

4.00

V

VDUVLO

VBUS to BAT Differential Undervoltage

Lockout

VBUS–BAT Rising Threshold

VBUS–BAT Falling Threshold

200

mV

50

mV

VOUT

VOUT Voltage

Switching Modes, BAT = 4.2V,

IVOUT = 0mA, Battery Charger Off

4.3

4.5

4.7

V

Switching Modes, BAT < 3.0V,

IVOUT = 0mA, Battery Charger Off

3.5

3.6

3.75

V

USB Suspend Modes, IVOUT = 250µA

4.5

4.6

4.7

V

fOSC

Switching Frequency

1.96

2.25

2.65

MHz

RPMOS

PMOS On-Resistance

0.18

Ω

RNMOS

NMOS On-Resistance

0.30

Ω

IPEAK

Peak Inductor Current Clamp

500mA to 1.2A Input Limit Modes

3

A

RSUSP

Suspend LDO Output Resistance

16

Ω

Battery Charger

VFLOAT

BAT Regulated Output Voltage

4.200V Setting Selected by I2C

4.179

4.200 4.221

V

l 4.165

4.200 4.235

V

ICHG_RANGE

4.100V Default Setting

Constant-Current Mode Charge Current

Range

ILIM2/1/0 = 101, Selectable by I2C

4.079

4.100 4.121

V

l 4.065

4.100 4.135

V

500-1200

mA

ICHG500mA

ICHG1200mA

ICHG_STEP

IBATQ

Zero-Scale Battery Charge Current

Full-Scale Battery Charge Current

Charge Current I2C Step Size

Battery Drain Current

ILIM2/1/0 = 101, ICHARGE2/1/0 = 000

ILIM2/1/0 = 101, ICHARGE2/1/0 = 111

ILIM2/1/0 = 101

VBUS > VUVLO, Battery Charger Off,

IVOUT = 0µA

VBUS = 0V, IVOUT = 0µA

(Ideal Diode Mode)

475

500

525

mA

1100

1200

1300

mA

100

mA

3.7

5

µA

23

35

µA

4099fd



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