LT1952/LT1952-1
2
19521fd
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
V
IN
(Note 8) ...............................................–0.3V to 25V
SYNC, SS_MAXDC, SD_V
SEC
, I
SENSE
, OC ....–0.3V to 6V
COMP, BLANK, DELAY ...............................–0.3V to 3.5V
FB ................................................................– 0.3V to 3V
R
OSC
..................................................................... –50μA
V
REF
....................................................................–10mA
Operating Junction Temperature Range
(Notes 2, 5) ............................................–40°C to 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
COMP
FB
R
OSC
SYNC
SS_MAXDC
V
REF
SD_V
SEC
GND
SOUT
V
IN
OUT
PGND
DELAY
OC
I
SENSE
BLANK
T
JMAX
= 125°C, θ
JA
= 110°C/W, θ
JC
= 40°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1952EGN#PBF LT1952EGN#TRPBF 1952 16-Lead Plastic SSOP –40°C to 125°C
LT1952IGN#PBF LT1952IGN#TRPBF 1952I 16-Lead Plastic SSOP –40°C to 125°C
LT1952EGN-1#PBF LT1952EGN-1#TRPBF 19521 16-Lead Plastic SSOP –40°C to 125°C
LT1952IGN-1#PBF LT1952IGN-1#TRPBF 1952I1 16-Lead Plastic SSOP –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1952EGN LT1952EGN#TR 1952 16-Lead Plastic SSOP –40°C to 125°C
LT1952IGN LT1952IGN#TR 1952I 16-Lead Plastic SSOP –40°C to 125°C
LT1952EGN-1 LT1952EGN-1#TR 19521 16-Lead Plastic SSOP –40°C to 125°C
LT1952IGN-1 LT1952IGN-1#TR 1952I1 16-Lead Plastic SSOP –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi
cations, go to: http://www.linear.com/tapeandreel/
PARAMETER CONDITIONS MIN TYP MAX UNITS
PWM CONTROLLER
Operational Input Voltage I(V
REF
) = 0μA
l
V
IN
OFF 25 V
V
IN
Quiescent Current I(V
REF
) = 0μA, I
SENSE
= OC = Open 5.2 6.5 mA
V
IN
Start-up Current (LT1952) FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
l
460 700 μA
V
IN
Start-up Current (LT1952-1) FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
l
400 575 μA
V
IN
Shutdown Current SD_V
SEC
= 0V 240 350 μA
SD_V
SEC
Threshold 10V < V
IN
< 25V
l
1.261 1.32 1.379 V
SD_V
SEC (ON)
Current SD_V
SEC
= SD_V
SEC
Threshold + 100mV 0 μA
SD_V
SEC (OFF)
Current SD_V
SEC
= SD_V
SEC
Threshold – 100mV 8.3 10 11.7 μA
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. COMP = open, FB = 1.4V, R
OSC
= 178k, SYNC = 0V, SS_MAXDC = V
REF
, V
REF
= 0.1μF, SD_V
SEC
= 2V, BLANK = 121k, DELAY = 121k, I
SENSE
= 0V, OC = 0V, OUT = 1nF, V
IN
= 15V, SOUT = open, unless otherwise specifi ed.
ELECTRICAL CHARACTERISTICS
