Datasheet

2
LT1307/LT1307B
1307fa
V
IN
, SHDN, LBO Voltage ......................................... 12V
SW Voltage ............................................................. 30V
FB Voltage ....................................................... V
IN
+ 1V
V
C
Voltage ................................................................ 2V
LBI Voltage ............................................ 0V ≤ V
LBI
≤ 1V
Current into FB Pin .............................................. ±1mA
Junction Temperature...........................................125°C
Operating Temperature Range
Commercial (Note 2) ......................... –20°C to 70°C
Industrial ........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
T
JMAX
= 125°C, θ
JA
= 160°C/W
ORDER PART
NUMBER
ORDER PART
NUMBER
1
2
3
4
V
C
FB
SHDN
GND
8
7
6
5
LBO
LBI
V
IN
SW
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
1
2
3
4
8
7
6
5
TOP VIEW
LBO
LBI
V
IN
SW
V
C
FB
SHDN
GND
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
LT1307CMS8
LT1307BCMS8
LT1307CN8
LT1307CS8
LT1307IS8
LT1307BCS8
LT1307BIS8
T
JMAX
= 125°C, θ
JA
= 100°C/W (N8)
T
JMAX
= 125°C, θ
JA
= 120°C/W (S8)
S8 PART MARKING
1307
1307B
1307I
1307BI
MS8 PART MARKING
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
Commercial Grade 0°C to 70°C. V
IN
= 1.1V, V
SHDN
= V
IN
, LT1307/LT1307B unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
Q
Quiescent Current Not Switching (LT1307) ● 50 90 µA
Not Switching (LT1307B)
● 1.0 1.5 mA
V
SHDN
= 0V ● 13µA
V
FB
Feedback Voltage ● 1.20 1.22 1.24 V
I
B
FB Pin Bias Current (Note 3) V
FB
= V
REF
● 27 60 nA
Reference Line Regulation 1V ≤ V
IN
≤ 2V (25°C, 0°C) 0.6 1.1 %/V
1V ≤ V
IN
≤ 2V (70°C) 1.5 %/V
2V ≤ V
IN
≤ 5V ● 0.3 0.8 %/V
Minimum Input Voltage 0.92 1 V
Input Voltage Range ● 15V
g
m
Error Amp Transconductance ∆I = 5µA ● 25 35 65 µmhos
A
V
Error Amp Voltage Gain 25°C, 0°C 35 100 V/V
70°C 30 V/V
f
OSC
Switching Frequency ● 550 600 750 kHz
LTIC
LTIB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
(Note 1)
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS