LTC3672B-1_15 Datasheet, PDF (4/12 Pages) Linear Technology – Monolithic Fixed-Output 400mA Buck Regulator with Dual

LTC3672B-1
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified.
V_IN Quiescent Current vs
V_IN Voltage
500 _{SW PIN NOT SWITCHING}
400
130°C
90°C
300
25°C
200
–45°C
100
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN (V)
3672b1 G01
Buck Regulated Output vs
Temperature
1.845 _{VIN = 3.6V}
V_IN1 = 1.8V
1.830
1.815
1.800
1.785
BUCK AT NO LOAD
BUCK AT 400mA LOAD
1.770
1.755
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3672b1 G04
Buck Regulated Output vs V_IN
Input Voltage
1.85 _{BOTH LDOs UNLOADED}
1.84
1.83
1.82
1.81
BUCK AT NO LOAD
1.80
1.79
BUCK AT 400mA LOAD
1.78
1.77
1.76
1.75
2.5
3.0 3.5 4.0 4.5 5.0 5.5
V_IN INPUT VOLTAGE (V)
3672b1 G07
4
V_IN1 Quiescent Current vs
V_IN1 Voltage
5 _{VIN = VIN1}
4
90°C
3
130°C
2
–45°C
25°C
1
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
V_IN1 (V)
3672b1 G02
LDO1 Regulated Output vs
Temperature
1.23 _{VIN = 3.6V}
V_IN1 = 1.8V
1.22
1.21
LDO1 AT NO LOAD
1.20
1.19
LDO1 AT 150mA LOAD
1.18
1.17
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3672b1 G05
LDO1 Regulated Output vs V_IN1
Input Voltage
1.23 _{BUCK AND LDO2 UNLOADED}
V_IN = 3.6V
1.22
1.21
I_LDO1 = 0mA
1.20
1.19
I_LDO1 = 150mA
1.18
1.17
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN1 INPUT VOLTAGE (V)
3672b1 G08
V_IN1 Quiescent Current vs
Temperature
3.0 _{VIN = 2.8V TO 5.5V}
V_IN1 = 1.8V
2.5
2.0
1.5
1.0
0.5
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3672b1 G03
LDO2 Regulated Output vs
Temperature
2.87 _{VIN = 3.6V}
2.85 ^{VIN1 = 1.8V}
2.83
2.81
LDO2 AT NO LOAD
2.79
LDO2 AT 150mA LOAD
2.77
2.75
2.73
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3672b1 G06
LDO2 Regulated Output Voltage
vs V_IN Input Voltage
2.86 _{BUCK AND LDO1 UNLOADED}
2.84
2.82
I_LDO2 = 0mA
2.80
2.78
I_LDO2 = 150mA
2.76
2.74
2.5
3.0 3.5 4.0 4.5 5.0 5.5
V_IN INPUT VOLTAGE (V)
3672b1 G09
3672B1f