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

LTC3566
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
USB Limited Battery Charge
Current vs Battery Voltage
700
600
500
V_BUS = 5V
R_PROG = 1k
R_CLPROG = 3.01k
400
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
6
Ideal Diode Resistance
vs Battery Voltage
0.25
0.20
INTERNAL IDEAL
DIODE
0.15
0.10
0.05
0
2.7
INTERNAL IDEAL DIODE
WITH SUPPLEMENTAL
EXTERNAL VISHAY
Si2333 PMOS
3.0 3.3 3.6 3.9 4.2
BATTERY VOLTAGE (V)
3566 G02
USB Limited Battery Charge
Current vs Battery Voltage
150
125
100
V_BUS = 5V
R_PROG = 1k
R_CLPROG = 3.01k
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 = 3.01k
R_PROG = 1k
I_VOUT = 0mA
5x CHARGING
EFFICIENCY
90
1x CHARGING
EFFICIENCY
80
70
60
2.7
3.0
3.3
3.6
3.9
4.2
BATTERY VOLTAGE (V)
3566 G08
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
3.25
0
200 400 600 800
OUTPUT CURRENT (mA)
1000
3566 G03
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
V_BUS Quiescent Current vs V_BUS
Voltage (Suspend)
50
BAT = 3.8V
I_VOUT = 0mA
40
30
20
10
0
0
1
2
3
4
5
V_BUS VOLTAGE (V)
3566 G09
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