LT1961
W W U W
U
U
U
ABSOLUTE MAXIMUM RATINGS
PI CO FIGURATIO
(Note 1)
TOP VIEW
Input Voltage .......................................................... 25V
Switch Voltage......................................................... 35V
SHDN Pin ............................................................... 25V
FB Pin Current ....................................................... 1mA
SYNC Pin Current .................................................. 1mA
Operating Junction Temperature Range (Note 2)
LT1961E, LT1961I ........................... –40°C to 125°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
V
1
2
3
4
8 SYNC
IN
SW
GND
GND
7 V
C
6
5
FB
SHDN
MS8E PACKAGE
8-LEAD PLASTIC MSOP
GROUND PAD CONNECTED
TO LARGE COPPER AREA
TJMAX = 125°C, θJA = 50°C/W
U
W
U
ORDER I FOR ATIO
LEAD FREE FINISH
LT1961EMS8E#PBF
LT1961IMS8E#PBF
LEAD BASED FINISH
LT1961EMS8E
TAPE AND REEL
PART MARKING*
LTQY
PACKAGE DESCRIPTION
TEMPERATURE RANGE
–40°C to 125°C
LT1961EMS8E#TRPBF
LT1961IMS8E#TRPBF
TAPE AND REEL
8-Lead Plastic MSOP
8-Lead Plastic MSOP
PACKAGE DESCRIPTION
8-Lead Plastic MSOP
8-Lead Plastic MSOP
LTQY
–40°C to 125°C
PART MARKING*
LTQY
TEMPERATURE RANGE
–40°C to 125°C
LT1961EMS8E#TR
LT1961IMS8E#TR
LT1961IMS8E
LTQY
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The●denotesthespecificationswhichapplyoverthefulloperatingtemperature
range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.8V, SHDN, SYNC and switch open unless otherwise noted.
PARAMETER
CONDITION
MIN
3
TYP
MAX
25
UNITS
V
Recommended Operating Voltage
Maximum Switch Current Limit
Oscillator Frequency
●
●
●
●
●
●
1.5
1
2
3
A
3.3V < V < 25V
1.5
500
2.73
1.3
MHz
mV
V
IN
Switch On Voltage Drop
I
= 1.5A
310
2.6
0.9
27
SW
V
V
V
Undervoltage Lockout
Supply Current
(Note 3)
2.47
IN
IN
IN
I
I
= 0A
mA
mA/A
SW
SW
Supply Current/I
= 1.5A
SW
Shutdown Supply Current
V
= 0V, V = 25V, V = 25V
6
20
45
μA
μA
SHDN
IN
SW
●
●
Feedback Voltage
3V < V < 25V, 0.4V < V < 0.9V
1.182
1.176
1.2
1.218
1.224
V
V
IN
C
1961fa
2
Linear [ Linear ]
