Datasheet

LTC4155
6
4155fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
≈ T
J
= 25°C (Note 2). V
BUS
= 5V, BATSNS = 3.7V, DVCC = 3.3V,
R
CLPROG1
= R
CLPROG2
= 1.21k, R
PROG
= 499Ω, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
h
CLPROG2
(Note 4)
Ratio of Measured V
BUS
Current to
CLPROG2 Sense Current
2.5mA I
VBUS
Mode (USB Suspend)
100mA I
VBUS
Mode
500mA I
VBUS
Mode
600mA I
VBUS
Mode
700mA I
VBUS
Mode
800mA I
VBUS
Mode
900mA I
VBUS
Mode
1.00A I
VBUS
Mode
1.25A I
VBUS
Mode
1.50A I
VBUS
Mode
1.75A I
VBUS
Mode
2.00A I
VBUS
Mode
2.25A I
VBUS
Mode
2.50A I
VBUS
Mode
2.75A I
VBUS
Mode
3.00A I
VBUS
Mode
19
79
466
557
657
758
839
990
1222
1494
1746
1999
2175
2477
2730
2956
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
V
CLPROG1
CLPROG1 Servo Voltage in
Current Limit
CLPROG1 I
VBUS
Mode 1.2 V
V
CLPROG2
CLPROG2 Servo Voltage in
Current Limit
2.5mA I
VBUS
Mode (USB Suspend)
100mA – 3A I
VBUS
Modes
103
1.2
mV
V
f
OSC
Switching Frequency 2.05 2.25 2.50 MHz
R
PMOS
High Side Switch On Resistance 0.090 
R
NMOS
Low Side Switch On Resistance 0.080 
R
CHG
Battery Charger Current Sense
Resistance
0.040 
I
PEAK
Peak Inductor Current Clamp 500mA – 3A I
VBUS
Modes 6.7 A
Step-Up Mode PowerPath Switching Regulator (USB On-The-Go)
V
BUS
Output Voltage 0mA ≤ I
VBUS
≤ 500mA 4.75 5.25 V
V
OUT
Input Voltage 2.9 V
I
VBUSOTG
Output Current Limit 1.4 A
I
VOUTOTGQ
V
OUT
Quiescent Current I
VBUS
= 0mA 1.96 mA
V
CLPROG2
Output Current Limit Servo Voltage 1.2 V
V
BATSNSUVLO
V
BATSNS
Undervoltage Lockout V
BATSNS
Falling
Hysteresis
2.65 2.8
130
2.95 V
mV
t
SCFAULT
Short-Circuit Fault Delay V
BUS
< 4V 7.2 ms
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
V
UVLO
USB Input, Wall Input
Undervoltage Lockout
Rising Threshold
Falling Threshold
Hysteresis
4.05
3.90
100
4.45
4.25
V
V
mV
V
DUVLO
USB Input, Wall Input to BATSNS
Differential Undervoltage Lockout
Rising Threshold
Falling Threshold
Hysteresis
100
50
70
425
375
mV
mV
mV
V
OVLO
USB Input, Wall Input Overvoltage
Protection Threshold
Rising Threshold 5.75 6.0 6.3 V
V
USBGTACTV
USBGT Output Voltage Active USBSNS < V
USBOVLO
2 • V
USBSNS
V
V
WALLGTACTV
WALLGT Output Voltage Active WALLSNS < V
WALLOVLO
2 • V
WALLSNS
V
V
USBGTPROT
USBGT Output Voltage Protected USBSNS > V
USBOVLO
0V