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LTC2954CTS8-1#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
LTC2954
1
2954fb
Pushbutton On/Off
Controller with µP Interrupt
The LTC
®
2954 is a pushbutton on/off controller that
manages system power via a pushbutton interface. An
enable output toggles system power while an interrupt
output provides debounced pushbutton status. The inter-
rupt output can be used in menu driven applications to
request a system power-down. A power kill input allows
a microprocessor or system to reset the enable output,
effectively powering down the system. Independently
adjustable on and off timers allow dependable pushbutton
control of the enable output and resistance to accidental
toggling of system power.
The LTC2954 operates over a wide 2.7V to 26.4V input volt-
age range to accommodate a wide variety of input power
supplies. Very low quiescent current (6μA typical) makes
the LTC2954 ideally suited for battery powered applications.
Two versions of the part are available to accommodate
either positive or negative enable polarities.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
n
Pushbutton PowerPath™ Control
n
Portable Instrumentation Meters
n
Blade Servers
n
Portable Customer Service PDA
n
Desktop and Notebook Computers
n
Adjustable Power On/Off Timers
n
Low Supply Current: 6μA
n
Wide Operating Voltage Range: 2.7V to 26.4V
n
Low Leakage EN Output (LTC2954-1) Allows DC/DC
Converter Control
n
High Voltage EN Output (LTC2954-2) Allows Circuit
Breaker Control
n
Simple Interface Allows Graceful μP Shutdown
n
High Input Voltage PB Pin with Internal Pull-Up
Resistor
n
±10kV ESD HBM on PB Input
n
Accurate 0.6V Threshold on KILL Comparator Input
n
8-Pin 3mm × 2mm DFN and ThinSOT™ Packages
TYPICAL APPLICATION
FEATURES DESCRIPTION
APPLICATIONS
Pushbutton On/Off with Interrupt
V
IN
V
OUT
EN
INT
KILL
INT
KILL
LTC2954-2
ONT
PDT
DC/DC
μP/μC
9V
10k
t
PDT
= 6.4 SECONDS
100k
100k
2954 TA01a
1μF
PB
GND
V
IN
+
TURN-ON PULSE
TURNS ON STAYS ON
INTERRUPT INTERRUPT
TURNS OFF
SHORT PULSE
LONG PULSE
PB
INT
2954 TA01b
EN
LTC2954
2
2954fb
Supply Voltage (V
IN
) .................................. –0.3V to 33V
Input Voltages
PB ............................................................ –6V to 33V
ONT ...................................................... –0.3V to 2.7V
PDT ....................................................... –0.3V to 2.7V
KILL ......................................................... –0.3V to 7V
Output Voltages
INT ......................................................... –0.3V to 10V
EN/EN .................................................... –0.3V to 33V
(Note 1)
Operating Temperature Range
LTC2954C-1 ............................................. 0°C to 70°C
LTC2954C-2 ............................................. 0°C to 70°C
LTC2954I-1 ..........................................–40°C to 85°C
LTC2954I-2 ..........................................–40°C to 85°C
Storage Temperature Range
DFN Package ..................................... –65°C to 125°C
TSOT-23 .............................................–65°C to 150°C
Lead Temperature (Soldering, 10 sec) ...................300°C
ABSOLUTE MAXIMUM RATINGS
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2954CDDB-1#PBF LTC2954CDDB-1#TRPBF LCJG
8-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC2954CDDB-2#PBF LTC2954CDDB-2#TRPBF LCNJ
8-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC2954IDDB-1#PBF LTC2954IDDB-1#TRPBF LCJG
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC2954IDDB-2#PBF LTC2954IDDB-2#TRPBF LCNJ
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC2954CTS8-1#PBF LTC2954CTS8-1#TRPBF LTCJH 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2954CTS8-2#PBF LTC2954CTS8-2#TRPBF LTCNK 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2954ITS8-1#PBF LTC2954ITS8-1#TRPBF LTCJH 8-Lead Plastic TSOT-23 –40°C to 85°C
LTC2954ITS8-2#PBF LTC2954ITS8-2#TRPBF LTCNK 8-Lead Plastic TSOT-23 –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2954CDDB-1 LTC2954CDDB-1#TR LCJG
8-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC2954CDDB-2 LTC2954CDDB-2#TR LCNJ
8-Lead (3mm × 2mm) Plastic DFN
0°C to 70°C
LTC2954IDDB-1 LTC2954IDDB-1#TR LCJG
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC2954IDDB-2 LTC2954IDDB-2#TR LCNJ
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC2954CTS8-1 LTC2954CTS8-1#TR LTCJH 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2954CTS8-2 LTC2954CTS8-2#TR LTCNK 8-Lead Plastic TSOT-23 0°C to 70°C
LTC2954ITS8-1 LTC2954ITS8-1#TR LTCJH 8-Lead Plastic TSOT-23 –40°C to 85°C
LTC2954ITS8-2 LTC2954ITS8-2#TR LTCNK 8-Lead Plastic TSOT-23 –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
TOP VIEW
DDB PACKAGE
8-LEAD (3mm s 2mm) PLASTIC DFN
5
6
7
8
9
4
3
2
1GND
ONT
PB
V
IN
INT
EN/EN
PDT
KILL
T
JMAX
= 125°C, θ
JA
= 165°C/W
EXPOSED PAD (PIN 9) PCB GND CONNECTION OPTIONAL
V
IN
1
PB 2
ONT 3
GND 4
8 KILL
7 PDT
6 EN/EN
5 INT
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC TSOT-23
T
JMAX
= 125°C, θ
JA
= 140°C/W
PIN CONFIGURATION
LTC2954
3
2954fb
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 2.7V to 26.4V, unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Supply Voltage Range Steady State Operation
l
2.7 26.4 V
I
IN
V
IN
Supply Current System Power-On, V
IN
= 2.7V to 24V
l
612 μA
V
UVL
V
IN
Undervoltage Lockout V
IN
Falling
l
2.2 2.3 2.5 V
V
UVL(HYST)
V
IN
Undervoltage Lockout
Hysteresis
50 400 700 mV
Pushbutton, Enable (PB, EN/EN))
V
PB(MIN, MAX)
PB Voltage Range Single-Ended
l
–1 26.4 V
I
PB
PB Input Current 2.5V < V
PB
< 26.4V
V
PB
= 1V
V
PB
= 0.6V
l
l
l
–1
–3
–6
–9
±1
–12
–15
μA
μA
μA
V
PB(VTH)
PB Input Threshold PB Falling
l
0.6 0.8 1 V
V
PB(VOC)
PB Open Circuit Voltage I
PB
= –1μA 1 1.6 2 V
t
EN,LOCKOUT
EN/EN Lockout Time (Note 5)
Enable Released → Enable Asserted
l
200 256 325 ms
I
EN(LKG)
EN/EN Leakage Current V
EN/
EN
= 1V, Sink Current Off
V
EN/
EN
= 26.4V, Sink Current Off
l
l
±0.1
±1
μA
μA
V
EN(VOL)
EN/EN Voltage Output Low I
EN/
EN
= 500μA
l
0.11 0.4 V
Power-On Timing Pin (ONT)
I
ONT(PU)
ONT Pull-Up Current V
ONT
= 0V
l
–2.4 –3 –3.6 μA
I
ONT(PD)
ONT Pull-Down Current V
ONT
= 1.3V
l
2.4 3 3.6 μA
t
DB, ON
Internal Turn-On Debounce Time
ONT Pin Float, PB Falling → Enable Asserted
l
26 32 41 ms
t
ONT
Additional Adjustable Turn-On Time C
ONT
= 1500pF
l
9 11.5 13.5 ms
Power-Down Timing Pin (PDT)
I
PDT(PU)
PDT Pull-Up Current V
PDT
= 0V
l
–2.4 –3 –3.6 μA
I
PDT(PD)
PDT Pull-Down Current V
PDT
= 1.3V
l
2.4 3 3.6 μA
t
DB,OFF
Turn-Off Interrupt Debounce Time
PB Falling → INT Falling
l
26 32 41 ms
t
PD,MIN
Internal
PB
Power-Down Debounce
Time (Note 4)
PDT Pin Float, PB Falling → Enable Released
l
52 64 82 ms
t
PDT
Additional Adjustable PB
Power-Down Debounce Time
C
PDT
= 1500pF
l
9 11.5 13.5 ms
t
INT,MIN
Minimum INT Pulse Width INT Asserted → INT Released
l
26 32 41 ms
t
INT,MAX
Maximum INT Pulse Width C
PDT
= 1500pF, INT Asserted → INT Released
l
35 43.5 54.5 ms
μP Handshake Pins (INT, KILL)
I
INT(LKG)
INT Leakage Current V
INT
= 3V
l
±1 μA
V
INT(VOL)
INT Output Voltage Low I
INT
= 3mA
l
0.11 0.4 V
V
KILL(TH)
KILL Input Threshold Voltage KILL Falling
l
0.57 0.6 0.63 V
V
KILL(HYST)
KILL Input Threshold Hysteresis
l
10 30 50 mV
I
KILL(LKG)
KILL Leakage Current V
KILL
= 0.6V
l
±0.1 μA
t
KILL(PW)
KILL Minimum Pulse Width
l
30 μs
t
KILL(PD)
KILL Propagation Delay
KILL Falling → Enable Released
l
30 μs
t
KILL,ON BLANK
KILL Turn-On Blanking (Note 3)
KILL = Low, Enable Asserted → Enable Released
l
400 512 650 ms
ELECTRICAL CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

LTC2954CTS8-1#TRMPBF

Mfr. #:
Buy LTC2954CTS8-1#TRMPBF
Manufacturer:
Analog Devices Inc.
Description:
Supervisory Circuits Push Button On/Off Controller with U Interrupt for Menu Driven Applications
Lifecycle:
New from this manufacturer.
Delivery:
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