LT1952IGN Linear Technology, LT1952IGN Datasheet - Page 2

• Manufacturer Part Number: LT1952IGN
• Description: IC,SMPS CONTROLLER,CURRENT-MODE,SOP,16PIN,PLASTIC
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
LT1952/LT1952-1
(Note 1)
V
SYNC, SS_MAXDC, SD_V
COMP, BLANK, DELAY ............................. –0.3V to 3.5V
FB ................................................................ –0.3V to 3V
R
V
Operating Junction Temperature Range
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ELECTRICAL CHARACTERISTICS
range, otherwise specifications are at T
SD_V
PARAMETER
PWM CONTROLLER
Operational Input Voltage
V
V
V
V
SD_V
SD_V
SD_V
V
V
V
V
V
V
2
IN
IN
IN
IN
IN ON
IN OFF
IN HYSTERESIS
IN ON
IN OFF
IN HYSTERESIS
IN
REF
OSC ......................................................................................
(Notes 2, 5) ....................................... –40°C to 125°C
Quiescent Current
Startup Current (LT1952)
Startup Current (LT1952-1)
Shutdown Current
(Note 8) ............................................... –0.3V to 25V
SEC
SEC (ON)
SEC (OFF)
SEC
.................................................................... –10mA
(LT1952)
(LT1952-1)
(LT1952)
(LT1952-1)
Threshold
= 2V, BLANK = 121k, DELAY = 121k, I
Current
Current
(LT1952)
(LT1952-1)
W
SEC
W W
, I
SENSE
A
= 25°C. COMP = open, FB = 1.4V, R
, OC .... –0.3V to 6V
SENSE
= 0V, OC = 0V, OUT = 1nF, V
U
CONDITIONS
I
I
FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
FB = 0V, SS_MAXDC = 0V (Notes 4, 9)
SD_V
10V < V
SD_V
SD_V
(VREF)
(VREF)
SEC
SEC
SEC
= 0µA
= 0µA, I
–50µA
IN
The
= 0V
= SD_V
= SD_V
< 25V
●
SENSE
denotes the specifications which apply over the full operating temperature
SEC
SEC
= OC = Open
Threshold + 100mV
Threshold – 100mV
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
ORDER PART NUMBER
OSC
= 178k, SYNC = 0V, SS_MAXDC = V
IN
LT1952EGN
LT1952IGN
LT1952EGN-1
LT1952IGN-1
= 15V, SOUT = open, unless otherwise specified.
SS_MAXDC
SD_V
T
COMP
JMAX
SYNC
R
V
GND
OSC
REF
SEC
FB
= 125°C, θ
http://www.linear.com/leadfree/
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
●
●
●
●
●
●
●
●
●
●
GN PACKAGE
TOP VIEW
JA
= 110°C/W, θ
V
1.261
MIN
3.75
0.95
IN OFF
9.5
U
GN PART MARKING
16
15
14
13
12
11
10
9
JC
REF
14.25
1.32
11.2
8.75
7.75
1.25
TYP
= 40°C/W
5.2
5.5
6.5
460
400
240
SOUT
V
OUT
PGND
DELAY
OC
I
BLANK
SENSE
0
, V
IN
1952
1952I
19521
1952I1
REF
W
= 0.1µF,
1.379
15.75
MAX
12.9
9.25
6.75
8.13
6.82
700
575
350
6.5
25
UNITS
19521fb
U
mA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V