LTC2950ITS8-1#TRPBF Linear Technology, LTC2950ITS8-1#TRPBF Datasheet

IC PB ON/OFF CONTROLLER TSOT23-8

LTC2950ITS8-1#TRPBF

Manufacturer Part Number
LTC2950ITS8-1#TRPBF
Description
IC PB ON/OFF CONTROLLER TSOT23-8
Manufacturer
Linear Technology

Specifications of LTC2950ITS8-1#TRPBF

Applications
Push Button, On/Off Controller
Voltage - Supply
2.7 V ~ 26.4 V
Current - Supply
6µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
TSOT-23-8, TSOT-8
Operating Temperature (max)
85C
Operating Temperature (min)
-40C
Pin Count
8
Mounting
Surface Mount
Package Type
TSOT-23
Case Length
2.9mm
Screening Level
Industrial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Lead Free Status / Rohs Status
Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC2950ITS8-1#TRPBFLTC2950ITS8-1#TRMPBF
0
Company:
Part Number:
LTC2950ITS8-1#TRPBF
Manufacturer:
LT/凌特
Quantity:
20 000
n
n
n
n
n
n
n
n
n
n
applicaTions
n
n
n
n
Typical applicaTion
FeaTures
*OPTIONAL
**SHDN INTERNALLY PULLED UP BY DC/DC
Adjustable Pushbutton On/Off Timers
Low Supply Current: 6µA
Wide Operating Voltage Range: 2.7V to 26.4V
EN Output (LTC2950-1) Allows DC/DC Converter
Control
EN Output (LTC2950-2) Allows Circuit Breaker
Control
Simple Interface Allows Graceful µP Shut Down
High Input Voltage PB Pin with Internal Pull Up
Resistor
±10kV ESD HBM on PB Input
Accurate 0.6V Threshold on KILL Comparator Input
8-Pin 3mm × 2mm DFN and ThinSOT™ Packages
Portable Instrumentation Meters
Blade Servers
Portable Customer Service PDA
Desktop and Notebook Computers
2.7V TO 26.4V
GND
V
PB
IN
V
IN
ONT
LTC2950-1
C
0.033µF
ONT
*
OFFT
KILL
INT
EN
C
0.033µF
OFFT
*
V
SHDN**
IN
R1
10k
DC/DC
BUCK
V
OUT
INT
KILL
µP/µC
2950 TA01
DescripTion
The LTC
pushbutton ON/OFF controller. The part contains a pushbut-
ton input with independently programmable ON and OFF
debounce times that control the toggling of an open drain
enable output. The part also contains a simple micropro-
cessor interface to allow for proper system housekeeping
prior to power down. Under system fault conditions, an
internal KILL timer ensures proper power down.
The LTC2950 operates over a wide 2.7V to 26.4V input
voltage range to accommodate a wide variety of input
power supplies. Very low quiescent current (6µA typical)
makes the LTC2950 ideally suited for battery powered
applications. Two versions of the part are available to ac-
commodate either positive or negative enable polarities.
The parts are available in either 8-lead 3mm × 2mm DFN
or ThinSOT packages.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
®
2950 is a micropower, wide input voltage range,
2V/DIV
LTC2950-1/LTC2950-2
EN
PB
Pushbutton On/Off
Turn On Debounce
10ms/DIV
Controller
2950 TA01b
295012fd
1

Related parts for LTC2950ITS8-1#TRPBF

LTC2950ITS8-1#TRPBF Summary of contents

Page 1

... The parts are available in either 8-lead 3mm × 2mm DFN or ThinSOT packages. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... LTC2950IDDB-2#TRPBF LTC2950CTS8-1#TRMPBF LTC2950CTS8-1#TRPBF LTC2950CTS8-2#TRMPBF LTC2950CTS8-2#TRPBF LTC2950ITS8-1#TRMPBF LTC2950ITS8-1#TRPBF LTC2950ITS8-2#TRMPBF LTC2950ITS8-2#TRPBF TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. ...

Page 3

T SYMBOL PARAMETER V Supply Voltage Range Supply Current Undervoltage Lockout UVL Undervoltage Lockout UVL(HYST) IN Hysteresis Pushbutton, Enable (PB, EN/EN) V ...

Page 4

LTC2950-1/LTC2950-2 Typical perForMance characTerisTics Supply Current vs Temperature 26 – –25 TEMPERATURE (°C) 2950 G01 Turn On Debounce Time ...

Page 5

Typical perForMance characTerisTics PB Voltage vs External PB Resistance to Ground 300 V = 3.3V IN 250 200 T A 150 100 EXTERNAL PB RESISTANCE TO GROUND ( (LTC2950-1) Voltage vs V 1.0 ...

Page 6

LTC2950-1/LTC2950-2 pin FuncTions (TSOT-23/DFN) V (Pin 1/Pin 4): Power Supply Input: 2.7V to 26.4V (Pin 2/Pin 3): Pushbutton Input. Connecting PB to ground through a momentary switch provides on/off control via the EN/EN pin. An internal 100k pull-up ...

Page 7

DiagraM V IN 2.7V TO 26.4V REGULATOR 2.4V 100k PB 10µS FILTER 0.8V GND TiMing DiagraMs 2.4V OSCILLATOR DEBOUNCE OSCILLATOR ONT t KILL(PW) KILL t KILL(PD) EN/EN LTC2950-1/LTC2950-2 LOGIC OFFT 2950 TD01 EN/EN KILL 0.6V INT 2950 BD 295012fd ...

Page 8

LTC2950-1/LTC2950-2 TiMing DiagraMs (LTC2950-1) (LTC2950-2) OFFT (LTC2950-1) (LTC2950- & KILL IGNORED DB, ON ONT KILL, ON BLANK 16 CYCLES EN EN Power On Timing PB PB IGNORED t t DB, OFF OFFT 16 CYCLES ...

Page 9

Description The LTC2950 is a low power (6µA), wide input voltage range (2.7V to 26.4V), pushbutton on/off controller that can interface to a µP and a power supply. The turn-on and turn-off debounce times are extendable using optional ...

Page 10

LTC2950-1/LTC2950-2 applicaTions inForMaTion DB, ON ONT ONT OFFT INT KILL EN Figure 1. Simplified Power On/Off Sequence for LTC2950-1 POWER & KILL IGNORED t ...

Page 11

Aborted Power On Sequence The power on sequence is aborted when the KILL remains low after the end of the 512ms blanking time. Figure simplified version of an aborted power on sequence. At time t ...

Page 12

LTC2950-1/LTC2950-2 applicaTions inForMaTion The following equations describe the turn on and turn off times. C and C are the external programming ONT OFFT capacitors 32ms + 1ms + (6.7x10 BD,ON ONT 32ms ...

Page 13

Typical applicaTions below 0.6V, then an appropriate bypass capacitor should be connected to the KILL pin. PowerPath™ Switching The EN open drain output of the LTC2950-2 is designed to switch on/off an external power PFET. This allows a user to ...

Page 14

LTC2950-1/LTC2950-2 Typical applicaTions the PB board trace, however, will affect the open circuit voltage on the PB pin. If the leakage is too large (>2µA), the PB voltage may fall close to the threshold window. To mitigate the effect of ...

Page 15

DescripTion 0.61 ±0.05 (2 SIDES) 0.70 ±0.05 2.55 ±0.05 1.15 ±0.05 PACKAGE OUTLINE 0.25 ± 0.05 0.50 BSC 2.20 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING CONFORMS TO VERSION (WECD-1) IN JEDEC PACKAGE OUTLINE ...

Page 16

LTC2950-1/LTC2950-2 package DescripTion 0.40 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF ...

Page 17

... Revised Figures 5 and 6. Updated Related Parts. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. How- ever, 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. LTC2950-1/LTC2950-2 ...

Page 18

... Automatic Low Loss Switchover Between DC Sources High Voltage Pushbutton Controller with 200ms Voltage Reset Monitor Allow Controlled Software System Shutdown www.linear.com ● V OUT 1.8V R1 10k INT µP KILL 2950 F10 LT 0211 REV D • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 2008 295012fd ...

Related keywords