LTC3709 Linear Technology, LTC3709 Datasheet - Page 5

• Manufacturer Part Number: LTC3709
• Description: No RSENSE Synchronous DC/DC Controller
• Manufacturer: Linear Technology

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50mV/DIV
TYPICAL PERFOR A CE CHARACTERISTICS
20V/DIV
20V/DIV
V
10A/DIV
10A/DIV
3A-18A
RUN/SS
5V/DIV
1V/DIV
0.001
I
V
V
V
0.01
V
LOAD
SW1
SW2
OUT
0.1
OUT
10
I
I
L1
L2
1
10
Transient Response (CCM)
Start-Up
Power Loss vs Load Current
V
V
f = 220kHz
IN
OUT
= 12V
= 1.5V
100
LOAD CURRENT (mA)
20µs/DIV
1ms/DIV
1000
10000
W
3709 G07
U
3709 G01
3709 G04
100000
50mV/DIV
20V/DIV
20V/DIV
3A-18A
5V/DIV
5V/DIV
I
V
V
V
LOAD
SW1
SW2
SW1
SW2
OUT
100
85
80
95
90
Continuous Current Mode (CCM)
Transient Response (DCM)
4
Efficiency vs V
V
I
f = 220kHz
LOAD
OUT
= 1.5V
= 10A
8
20µs/DIV
12
2µs/DIV
IN
V
IN
(V)
16
20
3709 G02
3709 G05
3709 G08
24
5V/DIV
1V/DIV
100
95
90
85
80
75
70
65
60
55
50
SW1
SW2
2.6
3.0
2.8
2.4
2.2
2.0
10
Efficiency vs Load Current
V
V
f = 220kHz
–40
Discontinuous Current Mode (DCM)
IN
OUT
Quiescent Current at V
= 12V
= 1.5V
–20
100
TEMPERATURE (°C)
LOAD (mA)
0
10µs/DIV
1000
20
LTC3709
40
10000
CC
= 5V
60
3709 G06
100000
3709 G03
3709 G09
5
3709f
80