1308AI Linear Technology Corporation, 1308AI Datasheet - Page 5

• Manufacturer Part Number: 1308AI
• Description: Lt1308b - Single Cell High Currentmicropower 600khz Boost Dc/dc Converter
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
800
750
700
650
600
550
500
450
400
90
85
80
75
70
65
60
55
50
50
40
30
20
10
0
–50
1
0
LT1308B
12V Output Efficiency
Oscillator Frequency vs
Temperature
SHDN Pin Bias Current vs Voltage
–2.5
2
SHDN PIN VOLTAGE (V)
LOAD CURRENT (mA)
TEMPERATURE (°C)
10
0
V
4
IN
= 5V
25
V
6
IN
100
50
= 3.3V
W
8
75
1308A/B G04
– 40°C
1308 • G10
25°C
85°C
1308 G07
U
1000
100
10
180
170
160
150
140
130
120
110
100
4.0
3.5
3.0
2.5
2.0
80
70
60
50
40
30
20
10
0
–50
–50
0
FB, LBI Bias Current vs
Temperature
LT1308A Quiescent Current vs
Temperature
Switch Current Limit vs
Duty Cycle
–25
–25
20
LBI
TEMPERATURE (°C)
TEMPERATURE (°C)
DUTY CYCLE (%)
0
0
40
25
25
60
50
50
FB
80
75
75
1308 • G05
1308 • G11
1308 • G08
100
100
100
1.25
1.24
1.23
1.22
1.21
1.20
1.19
1.18
500
400
300
200
100
203
202
201
200
199
198
197
196
195
0
–50
–50
Feedback Pin Voltage vs
Temperature
LT1308A/LT1308B
0
Low Battery Detector Reference
vs Temperature
Switch Saturation Voltage
vs Current
–25
–25
0.5
SWITCH CURRENT (A)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
1.0
25
25
25°C
50
50
1.5
–40°C
85°C
75
75
1308 • G12
1308 • G09
1308abfa
1308 G06
5
100
2.0
100