Datasheet
LTC4156
9
4156f
TYPICAL PERFORMANCE CHARACTERISTICS
Switching Regulator Efficiency
Battery Charger Total Efficiency
vs Battery Voltage
Battery and V
BUS
Currents
vs V
OUT
Current
Battery and V
BUS
Currents
vs V
OUT
Current
Battery Drain Current
vs Temperature
V
OUT
CURRENT (A)
0
CURRENT (A)
0.2
0.4
0.8
0.6
0.8
4155 G01
0
–0.2
–0.4
0.2
0.4
0.6
1.0
INPUT CURRENT
CHARGE CURRENT
500mA INPUT CURRENT LIMIT MODE
V
OUT
CURRENT (A)
0
–1.5
CURRENT (A)
–0.5
–1.0
0
0.5
1.0
2.5
2.0
1.5
3.0
3.5
1 2 3 4
4155 G02
5
3A INPUT CURRENT LIMIT MODE
INPUT CURRENT
CHARGE CURRENT
CURRENT (A)
0
75
EFFICIENCY (%)
POWER LOST (W)
79
83
87
0.5
1.0
1.5 2.0
4156 G04
2.5
91
95
0
0.5
1.0
1.5
2.0
2.5
77
81
85
89
93
3.0
EFFICIENCY
TO V
OUT
EFFICIENCY
TO BATTERY
POWER LOST
TO BATTERY
POWER LOST
TO V
OUT
BATTERY VOLTAGE (V)
2.4
0.50
LOAD CURRENT (A)
0.75
1.00
1.25
1.50
1.75
2.7
3.0 3.3 3.6
4155 G06
3.9
500mA MODE
900mA MODE
V
FLOAT
= 3.8V
USB Compliant Load Current
Available Before Discharging
Battery
500mA USB Limited Battery
Charge Current vs Battery Voltage
100mA USB Limited Battery
Charge Current vs Battery Voltage
V
OUT
Voltage vs Battery Voltage
BATTERY VOLTAGE (V)
2.4
CHARGE CURRENT (A)
0.3
0.4
0.5
3.3
3.9
4156 G07
0.2
0.1
0
2.7 3.0 3.6
0.6
0.7
0.8
V
FLOAT
= 3.8V
12.5% CHARGE
CURRENT MODE
100% CHARGE
CURRENT MODE
TEMPERATURE (°C)
–25
CURRENT (µA)
6
8
10
95
4156 G03
4
2
5
7
9
3
1
0
5
35
65
–10–40 110
20
50
80
125
SUSPEND MODE (µA)
SHIP AND STORE MODE (µA)
V
BUS
= 0V
BATTERY VOLTAGE (V)
2.4
85
90
95
3.6
4156 G05
80
75
2.7 3.0 3.3 3.9
70
65
60
EFFICIENCY (%)
12.5% CHARGE
CURRENT MODE
100% CHARGE
CURRENT MODE
INCLUDES LOSSES FROM 2× Si7938DP OVP FETS
XFL4020-102ME INDUCTOR AND Si5481DU CHARGER FET
V
FLOAT
= 3.8V
BATTERY VOLTAGE (V)
2.4
CHARGE CURRENT (mA)
30
40
50
3.3
3.9
4156 G08
20
10
0
2.7 3.0 3.6
60
70
80
V
FLOAT
= 3.8V
BATTERY VOLTAGE (V)
2.4
3.0
V
OUT
(V)
3.3
3.6
3.9
4.2
4.5
2.7
3.0 3.3 3.6
4155 G09
3.9
100% CHARGE CURRENT MODE
50% CHARGE CURRENT MODE
12.5% CHARGE CURRENT MODE
CHARGER DISABLED
V
FLOAT
= 3.8V
I
VOUT
= 0A
T
A
= 25°C (Note 2). V
BUS
= 5V, BATSNS = 3.3V,
DVCC = 3.3V, R
CLPROG1
= R
CLPROG2
= 1.21k, R
PROG
= 499Ω, unless otherwise noted.