lt3688fe Linear Technology Corporation, lt3688fe Datasheet - Page 2

• Manufacturer Part Number: lt3688fe
• Description: Lt3688 - Dual 800ma Step-down Switching Regulator With Power-on Reset And Watchdog Timer
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
LT3688
(Note 1)
V
BST Voltage ..............................................................55V
BST above SW Voltage .............................................30V
BIAS Voltage .............................................................30V
WDE, WDI, RST, WDO Voltage ...................................6V
FB, RT , SYNC, RUN/SS Voltage ..................................6V
C
PIN CONFIGURATION
ORDER INFORMATION
LEAD FREE FINISH
LT3688EFE#PBF
LT3688IFE#PBF
LT3688HFE#PBF
LT3688EUF#PBF
LT3688IUF#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
IN
WDT
, EN/UVLO, CONFIG Voltage (Note 2) ...................36V
, C
EXPOSED PAD (PIN 25) IS GND, MUST BE ELECTRICALLY CONNECTED TO PCB
POR
Voltage ....................................................3V
RUN/SS1
RUN/SS2
CONFIG
BST1
BST2
SW1
SW2
DA1
DA2
FB1
FB2
V
IN
24-LEAD PLASTIC TSSOP
10
11
12
1
2
3
4
5
6
7
8
9
TAPE AND REEL
LT3688EFE#TRPBF
LT3688IFE#TRPBF
LT3688HFE#TRPBF
LT3688EUF#TRPBF
LT3688IUF#TRPBF
FE PACKAGE
θ
TOP VIEW
JA
GND
= 38°C/W
25
24
23
22
21
20
19
18
17
16
15
14
13
EN/UVLO
SYNC
RT
C
C
BIAS
C
WDI
WDE
WDO
RST1
RST2
WDT
POR1
POR2
http://www.linear.com/leadfree/
PART MARKING*
LT3688FE
LT3688FE
LT3688FE
3688
3688
http://www.linear.com/tapeandreel/
Operating Junction Temperature Range (Note 3)
Maximum Junction Temperature
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
LT3688E, LT3688I ..............................–40°C to 125°C
LT3688H ............................................–40°C to 150°C
LT3688E, LT3688I ............................................. 125°C
LT3688H ........................................................... 150°C
FE Package ....................................................... 300°C
EXPOSED PAD (PIN 25) IS GND, MUST BE ELECTRICALLY CONNECTED TO PCB
PACKAGE DESCRIPTION
24-Lead Plastic TSSOP
24-Lead Plastic TSSOP
24-Lead Plastic TSSOP
24-Lead (4mm × 4mm) Plastic QFN
24-Lead (4mm × 4mm) Plastic QFN
RUN/SS1
EN/UVLO
SYNC
BST1
FB1
RT
24-LEAD (4mm × 4mm) PLASTIC QFN
1
2
3
4
5
6
24 23 22 21 20 19
7
8
UF PACKAGE
θ
TOP VIEW
JA
9
GND
= 37°C/W
25
10 11 12
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
18
17
16
15
14
13
WDO
RST1
RST2
FB2
RUN/SS2
BST2
3688f