LT3685 LINER [Linear Technology], LT3685 Datasheet - Page 2

• Manufacturer Part Number: LT3685
• Description: 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ABSOLUTE MAXIMUM RATINGS
LT3690
(Note 1)
EN, UVLO, V
BST Voltage .............................................................55V
BST Voltage Above SW Voltage ...............................30V
BIAS, PG Voltage . ....................................................30V
FB, RT, SS, SYNC, V
Operating Junction Temperature Range (Notes 3 and 4)
Storage Temperature Range ................. –65°C to 150°C
ORDER INFORMATION
LEAD FREE FINISH
LT3690EUFE#PBF
LT3690IUFE#PBF
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifications, go to:
ELECTRICAL CHARACTERISTICS
PARAMETER
V
V
Quiescent Current from V
Quiescent Current from BIAS Pin
temperature range, otherwise specifications are at T
2
IN
IN
LT3690E ........................................... –40°C to 125°C
LT3690I ............................................ –40°C to 125°C
Fixed Undervoltage Lockout
Overvoltage Lockout OVLO
IN
Voltage (Note 2) ................................60V
IN
C
, V
TAPE AND REEL
LT3690EUFE#TRPBF
LT3690IUFE#TRPBF
CCINT
Voltage . .......................6V
CONDITIONS
V
V
V
V
V
V
V
IN
EN
BIAS
BIAS
EN
BIAS
BIAS
Rising
= 0.2V
= 0.2V
= 3V, V
= 0V, V
= 3V, V
= 0V, V
http://www.linear.com/leadfree/
PART MARKING*
3690
3690
FB
FB
FB
FB
http://www.linear.com/tapeandreel/
A
= 0.85V Not Switching
= 0.85V Not Switching
= 0.85V Not Switching
= 0.85V Not Switching
= 25°C, V
The
l
IN
denotes the specifications which apply over the full operating
= 12V unless otherwise noted (Notes 3, 7).
PIN CONFIGURATION
PACKAGE DESCRIPTION
26-Lead (4mm × 6mm) Plastic QFN
26-Lead (4mm × 6mm) Plastic QFN
EXPOSED PAD (PIN 28) IS GND, MUST BE SOLDERED TO PCB
EXPOSED PAD (PIN 27) IS SW, MUST BE SOLDERED TO PCB
SYNC
GND
GND
SW
SW
SW
SW
RT
V
FB
C
10
1
2
3
4
5
6
7
8
9
26-LEAD (4mm × 6mm) PLASTIC QFN
l
l
l
l
θ
JA
= 40°C/W, θ
UFE PACKAGE
MIN
TOP VIEW
36
GND
SW
27
28
JC
= 2.7°C/W
38.2
TYP
110
3.0
0.1
0.1
35
70
–3
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
26
25
24
23
22
21
20
19
18
17
MAX
150
110
–10
3.9
40
60
1
1
SW
SW
SW
SW
BST
GND
V
BIAS
PG
EN
CCINT
UNITS
3690f
µA
µA
µA
µA
µA
µA
V
V