LTC2951CTS8-2#PBF Linear Technology, LTC2951CTS8-2#PBF Datasheet

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LTC2951CTS8-2#PBF

Manufacturer Part Number
LTC2951CTS8-2#PBF
Description
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2951CTS8-2#PBF

Operating Temperature (max)
70C
Operating Temperature (min)
0C
Pin Count
8
Mounting
Surface Mount
Package Type
TSOT-23
Case Length
2.9mm
Screening Level
Commercial
Lead Free Status / RoHS Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2951CTS8-2#PBFLTC2951CTS8-2
Manufacturer:
LT
Quantity:
10 000
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Adjustable Push Button Debounce and Delay
Timers
Low Supply Current: 6µA
Wide Operating Voltage Range: 2.7V to 26V
EN Output (LTC2951-1) Allows DC/DC Converter
Control
⎯ E ⎯ N Output (LTC2951-2) Allows Circuit Breaker
Control
Simple Interface Allows Graceful µP Shut Down
High Input Voltage ⎯ P ⎯ B Pin with Internal Pull Up
Resistor
±10kV ESD HBM on ⎯ P ⎯ B Input
Accurate 0.6V Threshold on ⎯ K ⎯ I ⎯ L ⎯ L Comparator Input
8-Pin 3mm × 2mm DFN and ThinSOT
Portable Instrumentation Meters
Blade Servers
Portable Customer Service PDA
Desktop and Notebook Computers
3V – 26V
GND
V
PB
IN
V
IN
KILLT
LTC2951-1
U
C
0.033µF
KILLT
*
OFFT
KILL
INT
EN
C
0.033µF
OFFT
U
*
V
SHDN
IN
*OPTIONAL
R1
10k
TM
DC/DC
BUCK
Packages
V
OUT
INT
KILL
µP/µC
2951 TA01
DESCRIPTIO
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
The LTC
push button ON/OFF controller. The part contains a push
button input which controls the toggling of an open drain
enable output. The push button turn OFF debounce time
is externally programmable, while the turn ON debounce
time is fi xed at 128ms. A simple microprocessor interface
allows for proper system housekeeping prior to power
down. Under system fault conditions, an adjustable ⎯ K ⎯ I ⎯ L ⎯ L
timeout delay ensures proper power down.
The LTC2951 operates over a 2.7V to 26V input voltage
range to accommodate a variety of input power supplies.
Very low quiescent current (6µA typical) makes the
LTC2951 ideally suited for battery powered applications.
Two versions of the part are available to accommodate
either positive or negative enable polarities. The parts
are available in 8-pin 3mm × 2mm DFN and ThinSOT
packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
®
2951 is a micropower, wide input voltage range
2V/DIV
LTC2951-1/LTC2951-2
EN
PB
Push Button On/Off
U
Turn On Debounce
25ms/DIV
128ms
Controller
2951 TA01b
295112fa
1

Related parts for LTC2951CTS8-2#PBF

LTC2951CTS8-2#PBF Summary of contents

Page 1

... The parts are available in 8-pin 3mm × 2mm DFN and ThinSOT packages. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... W U INT EN/EN OFFT KILL DDB PART* ORDER PART MARKING NUMBER LBTB LTC2951CTS8-1 LBTD LTC2951CTS8-2 LBTB LTC2951ITS8-1 LBTD LTC2951ITS8-2 http://www.linear.com/leadfree/ The denotes the specifi cations which apply over the full operating ● = 25° 2.7V to 26.4V, unless otherwise noted. (Note ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER Push Button Pin ( ⎯ P ⎯ ⎯ P ⎯ B Voltage Range V ⎯ P ⎯ B (MIN, MAX) ⎯ P ⎯ B Input Current ...

Page 4

LTC2951-1/LTC2951 TYPICAL PERFOR A CE CHARACTERISTICS Supply Current vs Temperature 26 – 100 –25 TEMPERATURE (°C) 2951 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS ⎯ P ⎯ B Current vs ⎯ P ⎯ B Voltage –250 –200 –150 –100 –50 0 –10 – VOLTAGE (V) EN/ ⎯ E ⎯ Current Load ...

Page 6

LTC2951-1/LTC2951 CTIO S (TSOT-23/DFN) V (Pin 1/Pin 4): Power Supply Input: 2.7V to 26.4V. IN ⎯ P ⎯ B (Pin 2/Pin 3): Push Button Input. Connecting ⎯ P ⎯ ground through a momentary ...

Page 7

W BLOCK DIAGRA V IN REGULATOR 2.7V TO 26.4V 2.4V 100k PB 0.8V GND DIAGRA S 2.4V OSCILLATOR LOGIC DEBOUNCE OSCILLATOR KILLT t KILL(PW) KILL t KILL(PD) EN/EN LTC2951-1/LTC2951-2 0.6V 2951 BD OFFT 2951 ...

Page 8

LTC2951-1/LTC2951 DIAGRA S (LTC2951-1) (LTC2951-2) PB OFFT INT KILLT EN (LTC2951-1) EN (LTC2951- & KILL IGNORED t t DB, ON KILL, ON BLANK EN EN Power On Timing PB IGNORED t ...

Page 9

U U APPLICATIO S I FOR ATIO Description The LTC2951 is a low power (6µA), wide input voltage range (2.7V to 26.4V), push button On/Off controller that can interface to a µP and a power supply. The part incorporates all ...

Page 10

LTC2951-1/LTC2951 APPLICATIO S I FOR ATIO DB, ON OFFT INT KILL EN Figure 1. Simplifi ed Power On/Off Sequence for LTC2951-1 POWER ON TIMING KILL ...

Page 11

U U APPLICATIO S I FOR ATIO and ⎯ K ⎯ I ⎯ L ⎯ L (for a turnoff command) while consuming only 6µA of supply current. A high to low transition on ⎯ P ⎯ off sequence. ...

Page 12

LTC2951-1/LTC2951 APPLICATIO S I FOR ATIO High Voltage Pins and ⎯ P ⎯ B pins can operate at voltages up to 26.4V. The V IN ⎯ P ⎯ B can, additionally, operate below ground (–6V) without latching up ...

Page 13

U TYPICAL APPLICATIO S Power Path Switching The ⎯ E ⎯ N open drain output of the LTC2951-2 is designed to switch on/off an external power PFET. This allows a user to connect/disconnect a power supply (or battery) to its ...

Page 14

LTC2951-1/LTC2951-2 U TYPICAL APPLICATIO S External Pull-Up Resistor on ⎯ P ⎯ internal pull-up resistor on the ⎯ P ⎯ B pin makes an ex- ternal pull-up resistor unnecessary. Leakage current on the ⎯ P ⎯ B board ...

Page 15

... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U DDB Package 8-Lead Plastic DFN (3mm × ...

Page 16

... No External MOSFET, Automatic Switching Between DC Sources Effi cient Diode-ORing, Automatic Switching Between DC Sources 36V Automatic Switchover, Charges 1-Cell Li-Ion Batteries www.linear.com ● V OUT 1.8V R1 10k INT µP KILL 2951 F10 LT/LWI 0706 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 295112fa ...

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