LTC3709 Datasheet, PDF (5/24 Pages) Linear Technology – Fast 2-Phase, No RSENSE Synchronous DC/DC Controller with Tracking/Sequencing

TYPICAL PERFOR A CE CHARACTERISTICS
LTC3709
Start-Up
V_RUN/SS
5V/DIV
V_OUT
1V/DIV
I_L1
10A/DIV
I_L2
10A/DIV
1ms/DIV
Continuous Current Mode (CCM)
Discontinuous Current Mode (DCM)
SW1
5V/DIV
SW2
5V/DIV
3709 G01
2µs/DIV
SW1
5V/DIV
SW2
1V/DIV
3709 G02
10µs/DIV
3709 G03
Transient Response (CCM)
Transient Response (DCM)
I_LOAD
3A-18A
V_OUT
50mV/DIV
V_SW1
20V/DIV
V_SW2
20V/DIV
I_LOAD
3A-18A
V_OUT
50mV/DIV
V_SW1
20V/DIV
V_SW2
20V/DIV
20µs/DIV
3709 G04
20µs/DIV
3709 G05
Power Loss vs Load Current
10
V_IN = 12V
V_OUT = 1.5V
f = 220kHz
1
0.1
0.01
Efficiency vs V_IN
100
V_OUT = 1.5V
I_LOAD = 10A
f = 220kHz
95
90
85
Efficiency vs Load Current
100
V_IN = 12V
95 _{VOUT = 1.5V}
90 ^{f = 220kHz}
85
80
75
70
65
60
55
50
10
100
1000
10000 100000
LOAD (mA)
3709 G06
Quiescent Current at V_CC = 5V
3.0
2.8
2.6
2.4
2.2
0.001
10
100
1000
10000
LOAD CURRENT (mA)
100000
3709 G07
80
4
8
12
16
20
24
V_IN (V)
3709 G08
2.0
–40 –20 0
20 40 60 80
TEMPERATURE (°C)
3709 G09
3709f
5