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LTC1645IS#PBF

Description
IC CTLR HOT SWAP SEQ DUAL 14SOIC
CategoryPower/power management    The power supply circuit   
File Size329KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC1645IS#PBF Overview

IC CTLR HOT SWAP SEQ DUAL 14SOIC

LTC1645IS#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP14,.25
Contacts14
Manufacturer packaging codeS
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeR-PDSO-G14
JESD-609 codee3
length8.649 mm
Humidity sensitivity level1
Number of channels2
Number of functions1
Number of terminals14
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP14,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply2.5/12 V
Certification statusNot Qualified
Maximum seat height1.752 mm
Maximum supply current (Isup)2 mA
Maximum supply voltage (Vsup)12 V
Minimum supply voltage (Vsup)1.2 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.899 mm
LTC1645
Dual-Channel Hot Swap
Controller/Power Sequencer
FEATURES
s
s
s
s
DESCRIPTIO
s
s
s
s
s
s
Allows Safe Board Insertion and Removal from a
Live Backplane
Programmable Power Supply Sequencing
Programmable Electronic Circuit Breaker
User-Programmable Supply Voltage Power-Up and
Power-Down Rate
High Side Drivers for External N-Channel FETs
Controls Supply Voltages from 1.2V to 12V
Ensures Proper Power-Up Behavior
Undervoltage Lockout
Glitch Filter Protects Against Spurious RESET Signals
8- and 14-Pin SO Packages
APPLICATIO S
s
s
s
Hot Board Insertion
Power Supply Sequencing
Electronic Circuit Breaker
The LTC
®
1645 is a 2-channel Hot Swap
TM
controller that
allows a board to be safely inserted and removed from a
live backplane. Using external N-channel pass transistors,
the supply voltages can be ramped at a programmable
rate. Two high side switch drivers control the N-channel
gates for supply voltages ranging from 1.2V to 12V. The
two channels can be set to ramp up and down separately,
or they can be programmed to rise and fall simultaneously,
ensuring power supply tracking at the two outputs.
Programmable electronic circuit breakers protect against
shorts at either output. The RESET output can be used to
generate a system reset when a supply voltage falls below
a user-programmed voltage. An additional spare com-
parator is available for monitoring a second supply
voltage.
The LTC1645 is available in the 8- and 14-pin SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation.
TYPICAL APPLICATIO
V
IN2
5V and 3.3V Hot Swap
0.005Ω* IRF7413
5V and 3.3V Hot Swap Waveforms
+
V
OUT2
3.3V
5A
C
LOAD2
V
OUT1
5V
5A
C
LOAD1
0.005Ω*
V
IN1
IRF7413
ON
5V/DIV
+
10Ω
10Ω
0.01µF
25V
SENSE1 GATE1
V
CC1
ON
10k
GND
1645 TA01
GATEn
10V/DIV
CONNECTOR 2
CONNECTOR 1
0.01µF
25V
V
OUT2
5V/DIV
V
CC2
SENSE2 GATE2
LTC1645
(8-LEAD)
V
OUT1
5V/DIV
ON
GND
BACKPLANE PLUG-IN CARD
*LRF1206-01-R005-J (IRC)
U
1645fa
U
U
1
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