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LTC2955CTS8-2#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
LTC2955
1
2955fa
For more information www.linear.com/LTC2955
LT3008-3.3
V
OUT
V
IN
PB
ON
INT
KILL
PGD
V
IN
SEL
LTC2955DDB-1
2955 TA01a
GNDTMR
EN
3.3V
1M
R7
1M
2.32M
SHDN
0.1µF
8.4V
V
TRIP
= 5.4V
µP
POWER-FAIL
402k
Typical applicaTion
FeaTures DescripTion
Pushbutton On/Off
Controller with Automatic
Turn-On
The LTC
®
2955 is a micropower, pushbutton on/off control-
ler that manages system power by generating a clean enable
outp
ut from the supply monitor input and the debounced
pushbutton input. It features an interrupt output that
notifies the system of a pushbutton or low supply event.
When the system is ready, it may use the power kill input
to shut off power. If the pushbutton remains pressed for
more than the configurable turn-off duration, the system
power is forced off.
The supply input covers a wide range from 1.5V to 36V.
The robust pushbutton input handles wide voltage swings
of ±36V and ESD strikes to ±25kV (human body model)
without latchup or damage. A low 1.2µA supply current
maximizes battery run time. Separate versions are avail
-
able for positive or negative enable polarities.
Pushbutton On/Off with Interrupt
applicaTions
n
Automatic Turn-On Via Voltage Monitor Input
n
Wide Input Supply Range: 1.5V to 36V
n
Low Supply Current: 1.2µA
n
±25kV ESD HBM on PB Input
n
±36V Wide Input Voltage for PB Input
n
Low Leakage EN Output Allows DC/DC Converter
Control (LTC2955-1)
n
High Voltage EN Output Drives External P-Channel
MOSFET (LTC2955-2)
n
Simple Interface Allows Graceful µP Shutdown
n
Adjustable Turn-Off Timer
n
10-Lead 3mm × 2mm DFN and 8-Lead ThinSOT™
Packages
n
Desktop and Notebook Computers
n
GPS Devices
n
Portable Instruments
n
Automotive Electronics
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.
TURN ON PULSE SHORT PULSE LONG PULSE
TURNS ON STAYS ON
INTERRUPT INTERRUPT
TURNS OFF
PB
2955 TA01b
EN
INT
Automatic Turn-On with Power-Fail Indication
LTC2955
2
2955fa
For more information www.linear.com/LTC2955
pin conFiguraTion
absoluTe MaxiMuM raTings
V
IN
............................................................. –0.3V to 40V
Input Voltages
PB ........................................................... –40V to 40V
ON ......................................................... –0.3V to 40V
SEL ........................................................ –0.3V to 40V
KILL ......................................................... –0.3V to 6V
Output Voltages
EN/EN .................................................... –0.3V to 40V
INT ........................................................... –0.3V to 6V
PGD ......................................................... –0.3V to 6V
TMR ...................................................... –0.3V to 2.7V
(Note 1)
TOP VIEW
11
DDB PACKAGE
10-LEAD (3mm × 2mm) PLASTIC DFN
INT
PGD
*EN/EN
V
IN
PB
ON
KILL
TMR
SEL
GND
6
8
7
9
10
5
4
2
3
1
T
JMAX
= 125°C, θ
JA
= 55°C/W
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
*PIN 3 IS EN FOR LTC2955-1
AND IS EN FOR L
TC2955-2
1
2
3
4
8
7
6
5
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
INT
EN/EN*
V
IN
PB
ON
KILL
TMR
GND
T
JMAX
= 125°C, θ
JA
= 195°C/W
*PIN 7 IS EN FOR LTC2955-1
AND IS EN FOR LTC2955-2
orDer inForMaTion
Operating Temperature Range
LTC2955C ................................................ 0°C to 70°C
LTC2955I .............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSOT-23 Package .............................................300°C
Lead Free Finish
TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2955CDDB-1#TRMPBF LTC2955CDDB-1#TRPBF LGBJ 10-Lead (3mm × 2mm) Plastic DFN 0°C to 70°C
LTC2955CDDB-2#TRMPBF LTC2955CDDB-2#TRPBF LGBM 10-Lead (3mm × 2mm) Plastic DFN 0°C to 70°C
LTC2955IDDB-1#TRMPBF LTC2955IDDB-1#TRPBF LGBJ 10-Lead (3mm × 2mm) Plastic DFN –40°C to 85°C
LTC2955IDDB-2#TRMPBF LTC2955IDDB-2#TRPBF LGBM 10-Lead (3mm × 2mm) Plastic DFN –40°C to 85°C
LTC2955CTS8-1#TRMPBF LTC2955CTS8-1#TRPBF LTGBK 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2955CTS8-2#TRMPBF LTC2955CTS8-2#TRPBF LTGBN 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2955ITS8-1#TRMPBF LTC2955ITS8-1#TRPBF LTGBK 8-Lead Plastic TSOT-23 –40°C to 85°C
LTC2955ITS8-2#TRMPBF LTC2955ITS8-2#TRPBF LTGBN 8-Lead Plastic TSOT-23 –40°C to 85°C
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.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
(http://www.linear.com/product/LTC2955#orderinfo)
LTC2955
3
2955fa
For more information www.linear.com/LTC2955
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply
V
IN
Supply Voltage Range
l
1.5 36 V
I
IN
V
IN
Supply Current
l
0.5 1.2 3 µA
V
UVL
V
IN
Undervoltage Lockout V
IN
Rising
l
1.0 1.15 1.3 V
V
UVL(HYST)
V
IN
Undervoltage Lockout Hysteresis
l
30 85 200 mV
Input Pins
V
PB(MIN(MAX))
PB Voltage Range
l
–36 36 V
V
PB
PB Input Threshold PB Falling
l
0.6 0.8 1 V
V
PB(HYST)
PB Input Threshold Hysteresis (Note 3) 40 mV
V
PB(VOC)
PB Open Circuit Voltage I = –1µA
l
3.0 4.3 5.5 V
I
PB
PB Input Leakage Current 6V < PB < 36V
PB = 1V
PB = –36V
l
l
l
–1
–4
±10
–8
–400
µA
µA
µA
V
ON
ON Threshold ON Rising
l
0.76 0.80 0.84 V
V
ON(HYST)
ON Hysteresis DFN Package Only 40 mV
I
ON
ON Input Leakage Current ON = 1V
ON = 36V
l
l
±10
±100
nA
nA
V
KILL
KILL Input Threshold Voltage KILL Falling
l
0.76 0.80 0.84 V
V
KILL(HYST)
KILL Input Threshold Hysteresis (Note 3) 30 mV
I
KILL
KILL Input Leakage Current KILL = 1V
l
±50 nA
V
SEL
SEL Input Threshold
l
0.4 0.8 1.2 V
I
SEL
SEL Input Current SEL = 1V
SEL = 36V
l
l
±50
±100
nA
nA
Output Pins
V
EN/EN(VOL)
EN/EN Voltage Output Low I = 1mA
l
0.175 0.4 V
V
EN(VOH)
EN Voltage Output High (LTC2955-1) I = 0µA, –0.5µA
l
1.5 5.5 V
V
EN(VOH)
EN Voltage Output High (LTC2955-2) I = 0µA, –0.5µA
l
V
IN
– 1.5 V
I
EN
EN Pull-Up Current (LTC2955-1) EN = 0V
l
–1.2 –2 –2.8 µA
I
EN
EN Pull-Up Resistance (LTC2955-2)
l
0.45 0.9 1.35 MΩ
V
INT(VOL)
INT Voltage Output Low I = 3mA
l
0.4 V
I
INT
INT Leakage Current INT = 5V
l
±50 nA
V
PGD(VOH)
PGD Voltage Output High I = 0µA, –0.5µA
l
1.5 5.5 V
V
PGD(VOL)
PGD Voltage Output Low I = 3mA
l
0.4 V
I
PGD
PGD Pull-Up Current PGD = 0V
l
–1.2 –2 –2.8 µA
I
TMR(PU)
TMR Pull-Up Current TMR = 0V
l
–2 –3 –4 µA
I
TMR(PD)
TMR Pull-Down Current TMR = 1.5V
l
2 3 4 µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 7V unless otherwise noted. (Note 2)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

LTC2955CTS8-2#TRMPBF

Mfr. #:
Buy LTC2955CTS8-2#TRMPBF
Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits Pushbutton On/Off Controller with Automatic Turn-On
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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