Datasheet

6
LT1307/LT1307B
1307fa
Feedback Voltage vs
Temperature
LBI Reference vs Temperature
Oscillator Frequency vs
Input Voltage
TEMPERATURE (°C)
–50
1.200
FEEDBACK VOLTAGE (V)
1.205
1.210
1.215
1.220
1.230
–25
02550
1307 G10
75 100
1.225
V
IN
= 1.25V 500µs/DIV 1307 G13
V
OUT
= 3.3V
Transient Response (LT1307)
I
L
200mA/DIV
V
OUT
200mV/DIV
AC COUPLED
55mA
5mA
I
LOAD
V
IN
= 0.92V I
LOAD
10mA/DIV 1307 G15
V
OUT
= 3.3V
Load Regulation (LT1307)
V
OUT
50mV/DIV
DC
COUPLED
OFFSET
ADDED
TEMPERATURE (°C)
–50
REFERENCE VOLTAGE (mV)
–25
0
25 50
LT1307 • TPC11
75
210
208
206
204
202
200
198
196
194
192
190
100
V
IN
= 1.25V 500µs/DIV 1307 G14
V
OUT
= 3.3V
Transient Response (LT1307B)
I
L
200mA/DIV
V
OUT
200mV/DIV
AC COUPLED
55mA
5mA
V
IN
= 1.15V I
LOAD
20mA/DIV 1307 G17
V
OUT
= 3.3V
Load Regulation (LT1307)
V
IN
= 1V I
LOAD
10mA/DIV 1307 G18
V
OUT
= 5V
Load Regulation (LT1307)
V
OUT
50mV/DIV
DC
COUPLED
OFFSET
ADDED
V
OUT
50mV/DIV
DC
COUPLED
OFFSET
ADDED
V
IN
= 1V I
LOAD
20mA/DIV 1307 G16
V
OUT
= 3.3V
Load Regulation (LT1307)
V
OUT
50mV/DIV
DC
COUPLED
OFFSET
ADDED
Load Regulation (LT1307)
I
LOAD
V
IN
= 1.25V 100µs/DIV 1307 G21
V
OUT
= 5V
I
LOAD
= 1.5mA
I
L
100mA/DIV
V
SW
5V/DIV
V
OUT
50mV/DIV
AC COUPLED
V
OUT
50mV/DIV
AC COUPLED
V
IN
= 1.25V 100µs/DIV 1307 G20
V
OUT
= 5V
I
LOAD
= 1.5mA
I
L
100mA/DIV
V
SW
5V/DIV
V
OUT
50mV/DIV
DC
COUPLED
OFFSET
ADDED
V
IN
= 1.15V I
LOAD
10mA/DIV 1307 G19
V
OUT
= 5V
Circuit Operation, L = 22µH
(LT1307)
Circuit Operation, L = 10µH
(LT1307)
INPUT VOLTAGE (V)
1
FREQUENCY (kHz)
600
700
5
LT1307 • TPC12
500
400
2
3
4
900
800
85°C
–40°C
25°C
TYPICAL PERFOR A CE CHARACTERISTICS
UW