Absolute Maximum Ratings; Order Information; Electrical Characteristics - Linear Technology LT3956 Series Manual

LT3956

absoluTe MaxiMuM raTings

(Note 1)
V , ISP , ISN ..............................................................80V
IN
SW ............................................................................84V
EN/UVLO (Note 3) .....................................................80V
INTV ...................................................... V
CC
PWMOUT ..................................................INTV
CTRL, PWM, VMODE ................................................12V
FB ...............................................................................8V
V , V , SS ................................................................3V
C REF
RT ............................................................................1.5V
PGND to GND .........................................................±0.5V
Operating Junction Temperature Range
(Note 2) ............................................. –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range ................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec) .................. 300°C

orDer inForMaTion

LEAD FREE FINISH TAPE AND REEL
LT3956EUHE#PBF LT3956EUHE#TRPBF
LT3956IUHE#PBF LT3956IUHE#TRPBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
This product is only offered in trays. For more information go to:

elecTrical characTerisTics

erature range, otherwise specifications are at T
PARAMETER
V Minimum Operating Voltage
IN
V Shutdown I
IN Q
V Operating I (Not Switching)
IN Q
V Voltage
REF
V Line Regulation
REF

pin conFiguraTion
+ 0.3V, 8V
IN
+ 0.3V
CC
PART MARKING* PACKAGE DESCRIPTION
3956 36-Lead (5mm × 6mm) Plastic QFN
3956
36-Lead (5mm × 6mm) Plastic QFN
http://www.linear.com/leadfree/
http://www.linear.com/packaging/
The denotes the specifications which apply over the full operating temp-
l
= 25°C. V = 24V, EN/UVLO = 24V, CTRL = 2V, PWM = 5V, unless otherwise noted.
A IN
CONDITIONS
V Tied to INTV
IN CC
EN/UVLO = 0V
EN/UVLO = 1.15V
PWM = 0V
–100µA ≤ I ≤ 0µA
VREF
4.5V ≤ V ≤ 80V
IN
TOP VIEW
36 35 34 33 32 31 30
NC 1
EN/UVLO 2
INTV 3
CC 37
GND
GND 4
V 6
IN
38
SW 8
SW
SW 9
NC 10
12 13 14 15 16 17
UHE PACKAGE
36-LEAD (5mm 6mm) PLASTIC QFN
T = 125°C, θ = 43°C/W, θ
JMAX JA
EXPOSED PAD (PIN 37) IS GND, MUST BE SOLDERED TO PCB
EXPOSED PAD (PIN 38) IS SW, MUST BE SOLDERED TO PCB
MIN
l
1.965
l
28 ISP
27 ISN
25 FB
GND
24
23 PWMOUT
21 SW
20 SW
= 5°C/W
JC
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
TYP MAX UNITS
4.5 V
0.1 1 µA
5 µA
1.4 1.7 mA
2.00 2.045 V
0.006 %/V
3956f