lt1317b Linear Technology Corporation, lt1317b Datasheet - Page 5

• Manufacturer Part Number: lt1317b
• Description: Lt1317b - Micropower, 600khz Pwm Dc/dc Converters
• Manufacturer: Linear Technology Corporation

TYPICAL PERFOR A CE CHARACTERISTICS
AC COUPLED
I
LOAD
100mV/DIV
200mA/DIV
26
25
24
23
22
21
20
90
80
70
60
50
165mA
V
–50
0.3
5mA
OUT
Quiescent Current, SHDN = 0V
5V Output Efficiency, Circuit of
Figure 1 (LT1317)
I
L
Transient Response (LT1317)
V
V
CIRCUIT OF FIGURE 1
IN
OUT
–25
1
= 2V
= 3.3V
LOAD CURRENT (mA)
TEMPERATURE ( C)
0
10
25
1ms/DIV
50
V
V
V
100
IN
IN
IN
W
= 1.65V
= 2.2V
= 3V
75
1317 TPC10
1317 TPC13
U
1000
1317 TPC16
100
AC COUPLED
I
LOAD
100mV/DIV
200mA/DIV
165mA
40
36
32
28
24
20
16
12
90
80
70
60
50
40
8
4
0
V
–50
5mA
OUT
1
FB Pin Bias Current
2-Cell to 3.3V Converter
Efficiency (LT1317B)
I
L
Transient Response (LT1317B)
V
V
CIRCUIT OF FIGURE 1
WITH LT1317B
IN
OUT
–25
= 2V
= 3.3V
LOAD CURRENT (mA)
TEMPERATURE ( C)
10
0
25
1ms/DIV
100
50
V
V
V
IN
IN
IN
= 1.65V
= 2.2V
= 3V
75
1317 TPC11
1317 TPC14
1317 TPC17
1000
100
AC COUPLED
200mA/DIV
50mV/DIV
5V/DIV
90
80
70
60
50
40
–1
–2
–3
V
V
2
1
0
OUT
SW
0
1
I
2-Cell to 5V Converter Efficiency
(LT1317B)
SHDN Pin Current
L
Burst Mode Operation (LT1317)
V
V
I
CIRCUIT OF FIGURE 1
LOAD
LT1317/LT1317B
IN
OUT
= 2V
1
= 3.3V
= 30mA
SHDN PIN VOLTAGE (V)
LOAD CURRENT (mA)
10
2
20 s/DIV
3
100
4
V
V
V
IN
IN
IN
= 1.65V
= 2.2V
= 3V
5
1317 TPC12
1317 TPC15
1317 TPC18
5
1000
6