LTC3566-2_15 Datasheet, PDF (6/28 Pages) Linear Technology – High Efficiency USB Power Manager Plus 1A Buck-Boost Converter

LTC3566/LTC3566-2
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Ideal Diode V-I Characteristics
1.0
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
0.8
EXTERNAL VISHAY
Si2333 PMOS
0.6
INTERNAL IDEAL
DIODE ONLY
0.4
0.2
0
0
V_BUS = 0V
V_BUS = 5V
0.04 0.08 0.12 0.16 0.20
FORWARD VOLTAGE (V)
3566 G01
Output Current vs Output Voltage
(Battery Charger Enabled)
5x Mode (i.e. 500mA)
4.0
1.6
V_OUT, LTC3566-2
3.5
1.4
3.0
1.2
V_OUT, LTC3566
2.5
1.0
2.0
0.8
1.5
0.6
1.0
I_BAT, LTC3566
0.4
0.5 ^VBUS ^{= 5V}
V_BAT = 3V
0 R_CLPROG = 3.01k
–0.5 ^{RPROG = 2k}
0 0.1 0.2 0.3
I_BAT, LTC3566-2
0.4 0.5 0.6 0.7
OUTPUT CURRENT (A)
0.2
0
–0.2
0.8
3566 G31
Battery Drain Current
vs Battery Voltage
25
I_VOUT = 0μA
V_BUS = 0V
20
15
10
V_BUS = 5V
5
(SUSPEND MODE)
0
2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
3566 G06
6
Ideal Diode Resistance
vs Battery Voltage
0.25
0.20
INTERNAL IDEAL
DIODE
0.15
0.10
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
0.05
EXTERNAL VISHAY
Si2333 PMOS
Output Voltage vs Output Current
(Battery Charger Disabled)
4.50
BAT = 4V
V_BUS = 5V
5x MODE
4.25
4.00
BAT = 3.4V
3.75
3.50
0
3.25
2.7 3.0 3.3 3.6 3.9 4.2
0
BATTERY VOLTAGE (V)
3566 G02
200 400 600 800
OUTPUT CURRENT (mA)
1000
3566 G03
USB Limited Battery Charge
Current vs Battery Voltage
700
LTC3566
600
LTC3566-2
500
V_BUS = 5V
R_PROG = 1k
400
R_CLPROG = 3k
300
200
100
5x USB SETTING,
0 ^{BATTERY CHARGER SET FOR 1A}
2.7 3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
3566 G04
PowerPath Switching Regulator
Efficiency vs Output Current
100 _{BAT = 3.8V}
1x MODE
90
5x, 10x MODE
80
70
60
50
40
0.01
0.1
OUTPUT CURRENT (A)
1
3566 G07
USB Limited Battery Charge
Current vs Battery Voltage
150
LTC3566
125
LTC3566-2
V_BUS = 5V
100
R_PROG = 1k
R_CLPROG = 3k
75
50
25
1x USB SETTING,
BATTERY CHARGER SET FOR 1A
0
2.7 3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
3566 G05
Battery Charging Efficiency vs
Battery Voltage with No External
Load (P_BAT/P_BUS)
100
R_CLPROG = 3k
R_PROG = 1k
I_VOUT = 0mA
90
LTC3566-2
80
70
60
2.7
1x CHARGING EFFICIENCY
5x CHARGING EFFICIENCY
3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
3566 G08
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