Datasheet
LTC4099
7
4099fd
Ideal Diode V-I Characteristics
Ideal Diode Resistance
vs Battery Voltage
USB Compliant Output Current Available
Before Discharging Battery
FORWARD VOLTAGE (V)
0
CURRENT (A)
0.6
0.8
1.0
0.16
4099 G11
0.4
0.2
0
0.04
0.08
0.12
0.20
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE ONLY
BATTERY VOLTAGE (V)
2.7
RESISTANCE (Ω)
0.15
0.20
0.25
3.9
4099 G12
0.10
0.05
0
3.0
3.3
3.6
4.2
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
INTERNAL IDEAL
DIODE
BATTERY VOLTAGE (V)
2.7
0
OUTPUT CURRENT (mA)
200
400
600
3.0 3.3 3.93.6
800
100
300
500
700
4.2
4099 G07
V
BUS
INPUT LIMIT SET FOR USB 500mA
BATTERY VOLTAGE (V)
2.7
0
OUTPUT CURRENT (mA)
50
100
150
3.0 3.3 3.93.6
25
75
125
175
4.2
4099 G08
V
BUS
INPUT LIMIT SET FOR USB 100mA
BATTERY VOLTAGE (V)
2.7
0
CHARGE CURRENT (V)
200
400
600
3.0 3.3 3.93.6
100
300
500
700
4.2
4099 G09
V
FLOAT
VOLTAGE SET FOR 4.2V
V
BUS
INPUT LIMIT SET FOR USB 500mA
BATTERY CHARGER SET FOR 1200mA
USB Limited Battery Charge
Current vs Battery Voltage
Automatic Low Battery Charge
Current Reduction
USB Compliant Output Current Available
Before Discharging Battery
BATTERY VOLTAGE (V)
2.7
0
CHARGE CURRENT (V)
40
20
60
80
100
120
140
3.0 3.3 3.6 3.9
4099 G10
4.2
V
FLOAT
VOLTAGE SET FOR 4.2V
V
BUS
INPUT LIMIT SET FOR USB 100mA
USB Limited Battery Charge
Current vs Battery Voltage
Typical perForMance characTerisTics
T
A
= 25°C, V
BUS
= 5V, BAT = 3.8V, R
PROG
= 1.02k,
R
CLPROG
= 3.01k, unless otherwise noted.
Low Battery (Instant-On) Output
Voltage vs Temperature
TEMPERATURE (°C)
–40
OUTPUT VOLTAGE (V)
3.64
3.66
60
4099 G13
3.62
3.60
–15
10
35
85
3.68
BAT = 2.7V
I
VOUT
= 100mA
V
BUS
INPUT LIMIT SET FOR USB 500mA
Normalized Battery Charger Float
Voltage vs Temperature
TEMPERATURE (°C)
–40
NORMALIZED FLOAT VOLTAGE
0.998
0.999
1.000
60
4099 G14
0.997
0.996
–15
10
35
85
1.001
V
OUT
(V)
3.50
0
CHARGE CURRENT (mA)
100
200
300
400
500
3.55
3.60 3.65
4099 G15
3.70