LTC3407AIDD Datasheet, PDF (4/16 Pages) Linear Integrated Systems – Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator

LTC3407
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs Input Voltage
100
T_A = 25°C
95
90
1mA
85 _600mA
100mA
10mA
80
75
70
65 _{VOUT = 1.8V}
CIRCUIT OF FIGURE 1
60
2
3
4
5
INPUT VOLTAGE (V)
6
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
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
–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
12
3
4
5
V_IN (V)
6
7
3407 G08
Oscillator Frequency vs Supply
Voltage
1.8
T_A = 25°C
1.7
1.6
1.5
1.4
1.3
1.2
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
3.3V
90
4.2V
85
80
75
70
65
60
1
V_OUT = 2.5V Burst Mode OPERATION
CIRCUIT OF FIGURE 1
10
100
LOAD CURRENT (mA)
1000
3407 G10
Efficiency vs Load Current
100
95
Burst Mode OPERATION
90
85
80
PULSE-SKIPPING
75
MODE
70
65
60
1
V_IN = 3.6V, V_OUT = 1.8V
NO LOAD ON OTHER CHANNEL
10
100
LOAD CURRENT (mA)
1000
3407 G11
4
Load Regulation
4
3 ^{Burst Mode OPERATION}
2
1
0
PULSE-SKIPPING
–1
MODE
–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
3407fa