Datasheet

4
LTC3717
sn3717 3717fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
LOAD CURRENT (A)
EFFICIENCY (%)
100
90
80
70
60
50
40
30
20
10
0
0.01 1 10 100
3717 G06
0.1
V
IN
= 2.5V
V
OUT
= 1.25V
FIGURE 1 CIRCUIT
INPUT VOLTAGE (V)
1.5
1.7 1.9 2.1 2.3 2.5 2.7 2.9
V
OUT
/V
IN
(%)
3717 G07
50.00
49.95
49.90
49.85
49.80
49.75
49.70
49.65
LOAD = 0A
LOAD = 10A
FIGURE 1 CIRCUIT
LOAD = 1A
1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9
INPUT VOLTAGE (V)
FREQUENCY (kHz)
3717 G08
450
400
350
300
250
200
150
100
50
0
LOAD = 0A
V
OUT
= 1.25V
FIGURE 1 CIRCUIT
LOAD = 10A
LOAD CURRENT (A)
0
1 2 3 4 5 6 7 8 910
∆V
OUT
/V
OUT
(%)
3717 G09
0
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
V
IN
= 2.5V
V
OUT
= 1.25V
FIGURE 1 CIRCUIT
Efficiency vs Load Current
V
OUT
/V
IN
Tracking Ratio vs Input
Voltage
Frequency vs Input Voltage
Load Regulation
Start-Up Response Load-Step Transient
V
IN
= 2.5V 4ms/DIV 3718 G09.eps
V
OUT
= 1.25V
LOAD = 0.2Ω
FIGURE 1 CIRCUIT
V
IN
= 2.5V 20µs/DIV 3718 G10.eps
V
OUT
= 1.25V
LOAD = 500mA TO 10A STEP
FIGURE 1 CIRCUIT
V
OUT
1V/DIV
I
L
2A/DIV
V
OUT
200mV/DIV
I
L
5A/DIV
V
ON
VOLTAGE (V)
0
ON-TIME (ns)
400
600
3717 G11
200
0
1
2
3
1000
I
ION
= 30µA
800
TEMPERATURE (°C)
–50
ON-TIME (ns)
200
250
300
25 75
3717 G12
150
100
–25 0
50 100 125
50
0
I
ION
= 30µA
I
ON
CURRENT (µA)
1
10
ON-TIME (ns)
100
1k
10k
10 100
3717 G13
On-Time vs V
ON
Voltage
On-Time vs Temperature On-Time vs I
ON
Current