LTC4155 datasheet(6/52 Pages) LINER

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LTC4155

4155fc

ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating

junction temperature range, otherwise specifications are at TA ≈ TJ = 25°C (Note 2). VBUS = 5V, BATSNS = 3.7V, DVCC = 3.3V,

RCLPROG1 = RCLPROG2 = 1.21k, RPROG = 499Ω, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

hCLPROG2

(Note 4)

Ratio of Measured VBUS Current to

CLPROG2 Sense Current

2.5mA IVBUS Mode (USB Suspend)

100mA IVBUS Mode

500mA IVBUS Mode

600mA IVBUS Mode

700mA IVBUS Mode

800mA IVBUS Mode

900mA IVBUS Mode

1.00A IVBUS Mode

1.25A IVBUS Mode

1.50A IVBUS Mode

1.75A IVBUS Mode

2.00A IVBUS Mode

2.25A IVBUS Mode

2.50A IVBUS Mode

2.75A IVBUS Mode

3.00A IVBUS Mode

466

557

657

758

839

990

1222

1494

1746

1999

2175

2477

2730

2956

mA/mA

VCLPROG1

CLPROG1 Servo Voltage in

Current Limit

CLPROG1 IVBUS Mode

1.2

VCLPROG2

CLPROG2 Servo Voltage in

Current Limit

2.5mA IVBUS Mode (USB Suspend)

100mA – 3A IVBUS Modes

103

1.2

fOSC

Switching Frequency

2.05

2.25

2.50

MHz

RPMOS

High Side Switch On Resistance

0.090

RNMOS

Low Side Switch On Resistance

0.080

RCHG

Battery Charger Current Sense

Resistance

0.040

IPEAK

Peak Inductor Current Clamp

500mA – 3A IVBUS Modes

6.7

Step-Up Mode PowerPath Switching Regulator (USB On-The-Go)

VBUS

Output Voltage

0mA ≤ IVBUS ≤ 500mA

4.75

5.25

VOUT

Input Voltage

2.9

IVBUSOTG

Output Current Limit

1.4

IVOUTOTGQ

VOUT Quiescent Current

IVBUS = 0mA

1.96

VCLPROG2

Output Current Limit Servo Voltage

1.2

VBATSNSUVLO

VBATSNS Undervoltage Lockout

VBATSNS Falling

Hysteresis

2.65

2.8

130

2.95

tSCFAULT

Short-Circuit Fault Delay

VBUS < 4V

7.2

Overvoltage Protection, Priority Multiplexer and Undervoltage Lockout; USB Input Connected to USBSNS Through 3.6k Resistor; WALL Input

Connected to WALLSNS Through 3.6k Resistor

VUVLO

USB Input, Wall Input

Undervoltage Lockout

Rising Threshold

Falling Threshold

Hysteresis

4.05

3.90

100

4.45

4.25

VDUVLO

USB Input, Wall Input to BATSNS

Differential Undervoltage Lockout

Rising Threshold

Falling Threshold

Hysteresis

100

425

375

VOVLO

USB Input, Wall Input Overvoltage

Protection Threshold

Rising Threshold

5.75

6.0

6.3

VUSBGTACTV

USBGT Output Voltage Active

USBSNS < VUSBOVLO

2 • VUSBSNS

VWALLGTACTV

WALLGT Output Voltage Active

WALLSNS < VWALLOVLO

2 • VWALLSNS

VUSBGTPROT

USBGT Output Voltage Protected

USBSNS > VUSBOVLO

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