LTC2951IDDB-2#TRPBF Linear Technology, LTC2951IDDB-2#TRPBF Datasheet - Page 3

• Manufacturer Part Number: LTC2951IDDB-2#TRPBF
• Description: IC PUSH BUTTON ON/OFF CTRLR 8DFN
• Manufacturer: Linear Technology

Specifications of LTC2951IDDB-2#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: 8-DFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -

ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: The KILL turn-on blanking timer period is the waiting period
immediately after the enable output is asserted. This blanking time allows
sufficient time for the DC/DC converter and the µP to perform power-up
tasks. The KILL and PB inputs are ignored during this period. If KILL
remains low at the end of this time period, the enable output is released,
thus turning off system power. This time delay does not include t
SYMBOL
V
I
V
V
Pushbutton, Enable (PB, EN/ EN)
V
I
V
t
I
V
V
Timing Pins (KILLT, OFFT)
I
I
t
t
t
µP Handshake Pins (INT, KILL)
I
V
V
V
I
t
t
t
t
t
ADDITIONAL
temperature range, otherwise specifications are at T
IN
PB
EN/EN, Lockout
EN/EN(LKG)
KILLT, OFFT(PU)
KILLT, OFFT(PD)
DB, ON
DB, OFF
OFFT
INT(LKG)
KILL(LKG)
KILL(PW)
KILL(PD)
KILL, ON BLANK
KILL, OFF DELAY
KILL,OFF DELAY,
IN
UVL
UVL(HYST)
PB(MIN, MAX)
PB(VTH)
EN/EN(VOL)
PB(VOC)
INT(VOL)
KILL(TH)
KILL(HYST)
PARAMETER
Supply Voltage Range
V
V
V
PB Voltage Range
PB Input Current
PB Input Threshold
EN/EN Lockout Time (Note 5)
EN/EN Leakage Current
EN/EN Voltage Output Low
PB Open-Circuit Voltage
KILLT/OFFT Pull-Up Current
KILLT/OFFT Pull-Down Current
Turn-On Debounce Time
Internal Turn-Off Debounce Time
Additional Adjustable Turn-Off Time
INT Leakage Current
INT Output Voltage Low
KILL Input Threshold Voltage
KILL Input Threshold Hysteresis
KILL Leakage Current
KILL Minimum Pulse Width
KILL Propagation Delay
KILL Turn-On Blanking (Note 3)
Internal KILL Turn-Off Delay (Note 4)
Additional Adjustable KILL Turn-Off Delay
(Note 4)
IN
IN
IN
Supply Current
Undervoltage Lockout
Undervoltage Lockout Hysteresis
CONDITIONS
Steady-State Operation
System Power-On, V
V
Single-Ended
2.5V < V
V
V
PB Falling
Enable Released → Enable Asserted
V
I
I
V
V
PB Falling → Enable Asserted
OFFT Pin Float, PB Falling → INT Falling
C
V
I
KILL Falling
V
KILL Falling → Enable Released
KILL = Low, Enable Asserted → Enable Released
KILLT Pin Float, KILL = High, INT Asserted →
Enable Released
C
A
EN/EN
PB
INT
IN
PB
PB
EN/EN
KILLT, OFFT
KILLT, OFFT
OFFT
INT
KILL
KILLT
= 25°C. V
= –1µA
Falling
= 3mA
= 1V
= 0.6V
DB,ON
= 3V
= 0.6V
= 1500pF
= 3mA
= 1500pF
= 1V, Sink Current Off
The
PB
.
= 0V
= 1.3V
< 26.4V
l
IN
denotes the specifications which apply over the full operating
= 2.7V to 26.4V, unless otherwise noted. (Note 2)
Note 4: The internal KILL turn-off delay (t
delay from the initiation of a power-off sequence (INT falling, KILL = high),
to the release of the enable output. The additional, adjustable KILL turn-off
delay (t
(C
output. If the KILL input switches low at any time during KILL turn-off
delay, enable is released, thus turning off system power.
Note 5: The enable lockout time is designed to allow an application to
properly power down such that the next power-up sequence starts from a
consistent powered down configuration. PB is ignored during this lockout
time. This time delay does not include t
IN
KILLT
= 2.7V to 24V
) to provide extra delay from INT falling to the release of the enable
KILL
,
OFF DELAY, ADDITIONAL
LTC2951-1/LTC2951-2
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
) uses an optional external capacitor
MIN
–2.4
0.57
200
100
400
100
2.7
2.2
0.6
2.4
–3
50
–1
–1
26
10
30
1
9
9
DB, ON
KILL
.
,
OFF DELAY
0.11
11.5
0.11
11.5
TYP
300
256
128
512
128
2.3
0.8
1.6
0.6
–6
–9
–3
32
30
6
3
) is the default
MAX
26.4
26.4
±0.1
–3.6
13.5
0.63
±0.1
13.5
600
–12
–15
325
163
650
163
2.4
0.4
3.6
0.4
12
±1
41
±1
50
30
1
2
295112fb
UNITS
3
mV
mV
ms
ms
ms
ms
ms
ms
ms
µA
µA
µA
µA
µA
µA
µA
µA
µA
µs
µs
V
V
V
V
V
V
V
V