Datasheet

LTC4099
3
4099fd
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
h
CLPROG
(Note 4)
Ratio of Measured V
BUS
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
1200
1540
1980
2420
3080
10.9
65
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
mA/mA
I
VOUT
V
OUT
Current Available Before Discharging
Battery
100mA
Mode, BAT = 3.3V
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
0.23
1.6
135
672
840
1080
1251
1550
0.30
2.16
0.41
2.46
mA
mA
mA
mA
mA
mA
mA
mA
V
CLPROG
CLPROG Servo Voltage in Current Limit Switching Modes
Suspend Modes
1.18
102
V
mV
V
UVLO
V
BUS
Undervoltage Lockout Rising Threshold
Falling Threshold
3.90
4.30
4.00
4.35 V
V
V
DUVLO
V
BUS
to BAT Differential Undervoltage
Lockout
V
BUS–BAT
Rising Threshold
V
BUS–BAT
Falling Threshold
200
50
mV
mV
V
OUT
V
OUT
Voltage Switching Modes, BAT = 4.2V,
I
VOUT
= 0mA, Battery Charger Off
4.3 4.5 4.7 V
Switching
Modes, BAT < 3.0V,
I
VOUT
= 0mA, Battery Charger Off
3.5 3.6 3.75 V
USB
Suspend Modes, I
VOUT
= 250µA 4.5 4.6 4.7 V
f
OSC
Switching Frequency 1.96 2.25 2.65 MHz
R
PMOS
PMOS On-Resistance 0.18
Ω
R
NMOS
NMOS On-Resistance 0.30
Ω
I
PEAK
Peak Inductor Current Clamp 500mA to 1.2A Input Limit Modes 3 A
R
SUSP
Suspend LDO Output Resistance 16
Ω
Battery Charger
V
FLOAT
BAT Regulated Output Voltage 4.200V Setting Selected by I
2
C
l
4.179
4.165
4.200
4.200
4.221
4.235
V
V
4.100V
Default Setting
l
4.079
4.065
4.100
4.100
4.121
4.135
V
V
I
CHG_RANGE
Constant-Current Mode Charge Current
Range
I
LIM2/1/0
= 101, Selectable by I
2
C 500-1200 mA
I
CHG500mA
Zero-Scale Battery Charge Current I
LIM2/1/0
= 101, I
CHARGE2/1/0
= 000 475 500 525 mA
I
CHG1200mA
Full-Scale Battery Charge Current I
LIM2/1/0
= 101, I
CHARGE2/1/0
= 111 1100 1200 1300 mA
I
CHG_STEP
Charge Current I
2
C Step Size I
LIM2/1/0
= 101 100 mA
I
BATQ
Battery Drain Current V
BUS
> V
UVLO
, Battery Charger Off,
I
VOUT
= 0µA
3.7 5 µA
V
BUS
= 0V, I
VOUT
= 0µA
(Ideal Diode Mode)
23 35 µA
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
BUS
= 5V, BAT = 3.8V, DV
CC
= 3.3V, R
PROG
= 1.02k, R
CLPROG
= 3.01k, unless
otherwise noted.