LTC2951CTS8-2#PBF Linear Technology, LTC2951CTS8-2#PBF Datasheet - Page 3

• Manufacturer Part Number: LTC2951CTS8-2#PBF
• Manufacturer: Linear Technology

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

ELECTRICAL CHARACTERISTICS
SYMBOL
Push Button Pin ( ⎯ P ⎯ B )
V
I
V
V
Timing Pins (KILLT, OFFT)
I
I
t
t
t
µP Handshake Pins ( ⎯ I ⎯ N ⎯ T , ⎯ K ⎯ I ⎯ L ⎯ L )
I
V
V
V
I
t
t
t
t
t
ADDITIONAL
t
I
V
temperature range, otherwise specifi cations are at T
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 ⎯ K ⎯ I ⎯ L ⎯ L turn on blanking timer period is the waiting period
immediately after the enable output is asserted. This blanking time allows
suffi cient time for the DC/DC converter and the µP to perform power up
tasks. The ⎯ K ⎯ I ⎯ L ⎯ L and ⎯ P ⎯ B inputs are ignored during this period. If ⎯ K ⎯ I ⎯ L ⎯ L
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
⎯ P ⎯ B
KILLT, OFFT(PU)
KILLT, OFFT(PD)
DB, ON
DB, OFF
OFFT
⎯ I ⎯ N ⎯ T (LKG)
⎯ K ⎯ I ⎯ L ⎯ L (LKG)
EN/ ⎯ E ⎯ N , Lock Out
EN/ ⎯ E ⎯ N (LKG)
⎯ K ⎯ I ⎯ L ⎯ L (PW)
⎯ K ⎯ I ⎯ L ⎯ L (PD)
⎯ K ⎯ I ⎯ L ⎯ L , ON BLANK
⎯ K ⎯ I ⎯ L ⎯ L , OFF DELAY
⎯ K ⎯ I ⎯ L ⎯ L , OFF DELAY,
⎯ P ⎯ B (MIN, MAX)
⎯ P ⎯ B (VTH)
⎯ P ⎯ B (VOC)
⎯ I ⎯ N ⎯ T (VOL)
⎯ K ⎯ I ⎯ L ⎯ L (TH)
⎯ K ⎯ I ⎯ L ⎯ L (HYST)
EN/ ⎯ E ⎯ N (VOL)
PARAMETER
⎯ P ⎯ B Voltage Range
⎯ P ⎯ B Input Current
⎯ P ⎯ B Input Threshold
⎯ P ⎯ B 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 C
⎯ I ⎯ N ⎯ T Leakage Current
⎯ I ⎯ N ⎯ T Output Voltage Low
⎯ K ⎯ I ⎯ L ⎯ L Input Threshold Voltage
⎯ K ⎯ I ⎯ L ⎯ L Input Threshold Hysteresis
⎯ K ⎯ I ⎯ L ⎯ L Leakage Current
⎯ K ⎯ I ⎯ L ⎯ L Minimum Pulse Width
⎯ K ⎯ I ⎯ L ⎯ L Propagation Delay
⎯ K ⎯ I ⎯ L ⎯ L Turn On Blanking (Note 3)
Internal ⎯ K ⎯ I ⎯ L ⎯ L Turn Off Delay
(Note 4)
Additional Adjustable ⎯ K ⎯ I ⎯ L ⎯ L Turn Off
Delay (Note 4)
EN/ ⎯ E ⎯ N Lock Out Time (Note 5)
EN/ ⎯ E ⎯ N Leakage Current
EN/ ⎯ E ⎯ N Voltage Output Low
A
CONDITIONS
Single-Ended
2.5V < V
V
V
⎯ P ⎯ B Falling
I
V
V
⎯ P ⎯ B Falling → Enable Asserted
OFFT Pin Float, ⎯ P ⎯ B Falling → ⎯ I ⎯ N ⎯ T Falling
V
I
⎯ K ⎯ I ⎯ L ⎯ L Falling
V
⎯ K ⎯ I ⎯ L ⎯ L Falling → Enable Released
⎯ K ⎯ I ⎯ L ⎯ L = Low, Enable Asserted → Enable
Released
KILLT Pin Float, ⎯ K ⎯ I ⎯ L ⎯ L = High, ⎯ ⎯ I ⎯ ⎯ ⎯ N ⎯ ⎯ ⎯ T Asserted →
Enable Released
C
Enable Released → Enable Asserted
V
I
⎯ P ⎯ B
⎯ ⎯ ⎯ I ⎯ N ⎯ T
EN/ ⎯ E ⎯ N
⎯ P ⎯ B
⎯ P ⎯ B
KILLT, OFFT
KILLT, OFFT
OFFT
⎯ ⎯ ⎯ I ⎯ N ⎯ T
KILLT
EN/ ⎯ E ⎯ N
⎯ K ⎯ I ⎯ L ⎯ L
= 25°C. V
= –1µA
= 1V
= 0.6V
= 3mA
DB, ON
= 3V
= 0.6V
= 1500pF
= 1500pF
= 3mA
= 1V, Sink Current Off
The
⎯ P ⎯ B
.
< 26.4V
= 0V
= 1.3V
●
IN
denotes the specifi cations which apply over the full operating
= 2.7V to 26.4V, unless otherwise noted. (Note 2)
Note 4: The internal ⎯ K ⎯ I ⎯ L ⎯ L turn off delay (t
delay from the initiation of a power off sequence ( ⎯ I ⎯ N ⎯ T falling, ⎯ K ⎯ I ⎯ L ⎯ L = high),
to the release of the enable output. The additional, adjustable ⎯ K ⎯ I ⎯ L ⎯ L turn
off delay (t
(C
output. If the ⎯ K ⎯ I ⎯ L ⎯ L input switches low at any time during ⎯ K ⎯ I ⎯ L ⎯ L turn off
delay, enable is released, thus turning off system power.
Note 5: The enable lock out time is designed to allow an application to
properly power down such that the next power up sequence starts from a
consistent powered down confi guration. ⎯ P ⎯ B is ignored during this lock out
time. This time delay does not include t
KILLT
) to provide extra delay from ⎯ I ⎯ N ⎯ T falling to the release of the enable
⎯ K ⎯ I ⎯ L ⎯ L
,
OFF DELAY, ADDITIONAL
LTC2951-1/LTC2951-2
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
) uses an optional external capacitor
–2.4
0.57
MIN
100
400
100
200
0.6
2.4
–3
–1
–1
26
10
30
DB, ON
1
9
9
⎯ K ⎯ I ⎯ L ⎯ L
,
.
OFF DELAY
11.5
0.11
11.5
0.11
TYP
128
512
128
256
0.8
1.6
0.6
–9
–6
–3
32
30
3
) is the default
MAX
26.4
–3.6
13.5
0.63
±0.1
13.5
±0.1
–15
–12
163
650
163
325
3.6
0.4
0.4
±1
41
±1
50
30
1
2
295112fa
UNITS
3
mV
ms
ms
ms
ms
ms
ms
ms
µA
µA
µA
µA
µA
µA
µA
µA
µs
µs
V
V
V
V
V
V