LTC3407-2_15 Datasheet, PDF (4/16 Pages) Linear Technology – Dual Synchronous, 800mA, 2.25MHz Step-Down DC/DC Regulator

LTC3407-2
TYPICAL PERFORMANCE CHARACTERISTICS T_A = 25°C unless otherwise specified.
Efficiency vs Input Voltage
100
95
90
1mA
85
800mA
80
100mA
10mA
75
70
65
V_OUT = 1.8V
Burst Mode OPERATION
CIRCUIT OF FIGURE 1
60
2
3
4
5
INPUT VOLTAGE (V)
3407 G04
Reference Voltage
vs Temperature
0.615
V_IN = 3.6V
0.610
0.605
0.600
0.595
0.590
0.585
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3407 G07
Oscillator Frequency
vs Temperature
2.5
V_IN = 3.6V
2.4
2.3
2.2
2.1
2.0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3407 G05
R_DS(ON) vs Input Voltage
500
T_A = 25°C
450
400
MAIN
SWITCH
350
300
SYNCHRONOUS
250
SWITCH
200
1
2
3
4
5
6
V_IN (V)
3407 G08
Oscillator Frequency
vs Supply Voltage
10
8
6
4
2
0
–2
–4
–6
–8
–10
2
3
4
5
SUPPLY VOLTAGE (V)
6
3407 G06
R_DS(ON) vs Temperature
550
V_IN = 2.7V
500
450
V_IN = 4.2V ^{VIN = 3.6V}
400
350
300
250
200
150
100
–50
MAIN SWITCH
SYNCHRONOUS SWITCH
–25 0 25 50 75 100
TEMPERATURE (°C)
125 150
3407 G09
Efficiency vs Load Current
100
2.7V
95
3.6V
90
4.2V
85
80
75
70 _{VOUT = 2.5V}
Burst Mode OPERATION
65 _{NO LOAD ON OTHER CHANNEL}
CIRCUIT OF FIGURE 1
60
1
10
100
LOAD CURRENT (mA)
1000
3407 G10
Efficiency vs Load Current
100
95
Burst Mode OPERATION
90
85
80
75
PULSE-SKIPPING MODE
70
65
60
1
V_IN = 3.6V, V_OUT = 1.8V
NO LOAD ON OTHER CHANNEL
10
100
1000
LOAD CURRENT (mA)
3407 G11
4
Load Regulation
4
3
Burst Mode OPERATION
2
1
0
PULSE-SKIPPING MODE
–1
–2
–3
–4
1
V_IN = 3.6V, V_OUT = 1.8V
NO LOAD ON OTHER CHANNEL
10
100
LOAD CURRENT (mA)
1000
3407 G12
34072fc