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参数资料
| 型号： | LTC2951IDDB-1#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封装： | 3 X 2 MM, LEAD FREE, PLASTIC, MO-229WEED-1, DFN-8 |
| 文件页数： | 10/16页 |
| 文件大小： | 213K |
| 代理商： | LTC2951IDDB-1#TRMPBF |
LTC2951-1/LTC2951-2
3
295112fa
The ● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 2.7V to 26.4V, unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Push Button Pin (PB)
VPB(MIN, MAX)
PB Voltage Range
Single-Ended
●
–1
26.4
V
IPB
PB Input Current
2.5V < VPB < 26.4V
VPB = 1V
VPB = 0.6V
●
–1
–3
–6
–9
±1
–12
–15
A
VPB(VTH)
PB Input Threshold
PB Falling
●
0.6
0.8
1
V
VPB(VOC)
PB Open Circuit Voltage
IPB = –1A
●
11.62
V
Timing Pins (KILLT, OFFT)
IKILLT, OFFT(PU)
KILLT/OFFT Pull Up Current
VKILLT, OFFT = 0V
●
–2.4
–3
–3.6
A
IKILLT, OFFT(PD)
KILLT/OFFT Pull Down Current
VKILLT, OFFT = 1.3V
●
2.4
3
3.6
A
tDB, ON
Turn On Debounce Time
PB Falling → Enable Asserted
●
100
128
163
ms
tDB, OFF
Internal Turn Off Debounce Time
OFFT Pin Float, PB Falling → INT Falling
●
26
32
41
ms
tOFFT
Additional Adjustable Turn Off Time COFFT = 1500pF
●
9
11.5
13.5
ms
P Handshake Pins (INT, KILL)
IINT(LKG)
INT Leakage Current
VINT = 3V
●
±1
A
VINT(VOL)
INT Output Voltage Low
IINT = 3mA
●
0.11
0.4
V
VKILL(TH)
KILL Input Threshold Voltage
KILL Falling
●
0.57
0.6
0.63
V
VKILL(HYST)
KILL Input Threshold Hysteresis
●
10
30
50
mV
IKILL(LKG)
KILL Leakage Current
VKILL = 0.6V
●
±0.1
A
tKILL(PW)
KILL Minimum Pulse Width
●
30
s
tKILL(PD)
KILL Propagation Delay
KILL Falling → Enable Released
●
30
s
tKILL, ON BLANK
KILL Turn On Blanking (Note 3)
KILL = Low, Enable Asserted → Enable
Released
●
400
512
650
ms
tKILL, OFF DELAY
Internal KILL Turn Off Delay
(Note 4)
KILLT Pin Float, KILL = High, INT Asserted →
Enable Released
●
100
128
163
ms
tKILL, OFF DELAY,
ADDITIONAL
Additional Adjustable KILL Turn Off
Delay (Note 4)
CKILLT = 1500pF
●
9
11.5
13.5
ms
tEN/EN, Lock Out
EN/EN Lock Out Time (Note 5)
Enable Released → Enable Asserted
●
200
256
325
ms
IEN/EN(LKG)
EN/EN Leakage Current
VEN/EN = 1V, Sink Current Off
●
±0.1
A
VEN/EN(VOL)
EN/EN Voltage Output Low
IEN/EN = 3mA
●
0.11
0.4
V
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
sufcient time for the DC/DC converter and the P 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 tDB, ON.
Note 4: The internal KILL turn off delay (tKILL, OFF DELAY) is the default
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 (tKILL, OFF DELAY, ADDITIONAL) uses an optional external capacitor
(CKILLT) to provide extra delay from INT falling to the release of the enable
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 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 conguration. PB is ignored during this lock out
time. This time delay does not include tDB, ON.
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