Datasheet
2
LT1082
sn1082 1082fas
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Supply Voltage ....................................................... 75V
Switch Output Voltage .......................................... 100V
Feedback Pin Voltage (Transient, 1ms) ................ ±15V
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Operating Junction Temperature Range
LT1082M (OBSOLETE) ............... – 55°C to 150°C
LT1082I ........................................... – 40°C to 125°C
LT1082C............................................... 0°C to 100°C
E
LECTR
IC
AL C CHARA TERIST
ICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Reference Voltage Measured at Feedback Pin 1.224 1.244 1.264 V
V
C
= 0.8V ● 1.214 1.244 1.274 V
I
B
Feedback Input Current V
FB
= V
REF
350 750 nA
● 1100 nA
g
m
Error Amplifier ∆I
C
= ±25µA 3000 4400 6000 µmho
Transconductance ● 2400 7000 µmho
Error Amplifier Source or V
C
= 1.5V 150 200 400 µA
Sink Current ● 120 400 µA
Error Amplifier Clamp Hi Clamp, V
FB
= 1V 1.8 2.3 V
Voltage Lo Clamp, V
FB
= 1.5V 0.12 0.22 0.36 V
Reference Voltage Line Regulation 3V ≤ V
IN
≤ V
MAX
, V
C
= 0.8V ● 0.03 %/V
A
V
Error Amplifier Voltage Gain 0.9V ≤ V
C
≤ 1.4V 350 650 V/V
Minimum Input Voltage ● 2.6 3.0 V
1
2
3
4
8
7
6
5
TOP VIEW
GND
V
C
FB
NC
E2
V
SW
E1
V
IN
N8 PACKAGE
8-LEAD PLASTIC DIP
Q PACKAGE
5-LEAD DD
V
IN
V
SW
GND
FB
V
C
FRONT VIEW
5
4
3
2
1
T PACKAGE
5-LEAD TO-220
V
IN
V
SW
GND
FB
V
C
FRONT VIEW
5
4
3
2
1
T
JMAX
= 100°C, θ
JA
= 90°C/W (CN8)
T
JMAX
= 125°C, θ
JA
= 90°C/W (IN8)
T
JMAX
= 100°C, θ
JA
= 40°C/W (CQ)
T
JMAX
= 125°C, θ
JA
= 40°C/W (IQ)
NOTE: θ
JA
VARIES FROM 25°C/W TO 50°C/W
DEPENDING ON BOARD COMPOSITION.
T
JMAX
= 100°C, θ
JA
= 75°C/W, θ
JC
= 8°C/W (CT)
T
JMAX
= 125°C, θ
JA
= 75°C/W, θ
JC
= 8°C/W (IT)
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART NUMBER
ORDER PART NUMBER
ORDER PART NUMBER
LT1082CN8
LT1082IN8
LT1082CQ
LT1082IQ
LT1082CT
LT1082IT
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
V
IN
= 15V, V
C
= 0.5V, V
FB
= V
REF
, output pin open, unless otherwise
specified.
(Note 1)
LT1082MJ8
J8 PACKAGE
8-LEAD CERAMIC DIP
T
JMAX
= 150°C, θ
JA
= 100°C/W (MJ8)
OBSOLETE PACKAGE
Consider the Q Package for Alternate Source