LTC3577-4_15 Datasheet, PDF (11/52 Pages) Linear Technology – Highly Integrated Portable Product PMIC

LTC3577-3/LTC3577-4
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified
Battery Current and Voltage
vs Time
600
6
CHRG
500
5
V_BAT
400
4
300
3
200
1450mAhr
CELL
100 VBUS = 5V
R_PROG = 2k
R_CLPROG = 2k
0
012
SAFETY
TIMER 2
TERMINATION
C/10
1
I_BAT
0
3
4
56
TIME (HOUR)
357734 G07
Battery Float Voltage Load
Regulation (LTC3577-3)
4.24
V_BUS = 5V
4.22 ^{10x MODE}
4.20
4.18
4.16
4.14
4.12
4.10
0
200 400 600 800 1000
I_BAT (mA)
357734 G08
Battery Regulation (Float)
Voltage vs Temperature
4.24
I_BAT = 2mA
4.22
LTC3577-3
4.20
4.18
4.16
4.14
4.12
LTC3577-4
4.10
4.08
4.06
4.04
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
357734 G09
I_BAT vs V_BAT (LTC3577-3)
600
500
400
300
FALLING
V_BAT
200
RISING
V_BAT
V_BUS = 5V
100
10x MODE
R_PROG = 2k
R_CLPROG = 2k
0
2.0 2.4 2.8 3.2 3.6 4.0 4.4
V_BAT (V)
357734 G10
I_BAT vs V_BAT (LTC3577-4)
600
R_CLPROG = 2.1k
R_PROG = 2k
500 V_BUS = 5V
10x MODE
400
RISING
V_BAT
300
FALLING
V_BAT
200
100
0
2.0 2.4 2.8 3.2 3.6 4.0 4.4
V_BAT (V)
357734 G11
Forward Voltage vs Ideal Diode
Current (No External FET)
0.25
V_BUS = 0V
T_A = 25°C
V_BAT = 3.2V
0.20
V_BAT = 3.6V
V_BAT = 4.2V
0.15
0.10
0.05
0
0 0.2 0.4 0.6 0.8 1.0 1.2
I_BAT (A)
357734 G12
Forward Voltage vs Ideal Diode
Current (with Si2333DS External FET)
40
V_BAT = 3.8V
35 ^VBUS ^{= 0V}
T_A = 25°C
30
25
20
Input Connect Waveform
V_BUS
5V/DIV
V_OUT
5V/DIV
I_BUS
0.5A/DIV
15
I_BAT
0.5A/DIV
10
5
0
0
0.2
0.4
0.6
0.8 1.0
I_BAT (A)
357734 G13
V_BAT = 3.75V
I_OUT = 100mA
R_CLPROG = 2k
R_PROG = 2k
1ms/DIV
357734 G14
Input Disconnect Waveform
V_BUS
5V/DIV
V_OUT
5V/DIV
I_BUS
0.5A/DIV
I_BAT
0.5A/DIV
V_BAT = 3.75V
I_OUT = 100mA
R_CLPROG = 2k
R_PROG = 2k
1ms/DIV
357734 G15
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