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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： | 13/16页 |
| 文件大小： | 213K |
| 代理商： | LTC2951IDDB-1#TRMPBF |
LTC2951-1/LTC2951-2
6
295112fa
VIN (Pin 1/Pin 4): Power Supply Input: 2.7V to 26.4V.
PB (Pin 2/Pin 3): Push Button Input. Connecting PB to
ground through a momentary switch provides on/off
control via the EN/EN pin. An internal 100k pull-up resis-
tor connects to an internal 1.9V bias voltage. The rugged
PB input can be pulled up to 26.4V externally without
consuming extra current.
KILLT (Pin 3/Pin 2): Additional, Adjustable KILL Turn Off
Delay Input (tKILL, OFF DELAY, ADDITIONAL). A capacitor to
ground provides additional delay time (beyond the internal
default 128ms, tKILL, OFF DELAY) from INT falling to the
automatic release of the enable output. The KILL turn off
delay feature ensures the release of the enable pin under
system fault conditions, such as the P not responding
to the LTC2951 interrupt signal (INT low).
GND (Pin 4/Pin 1): Device Ground.
INT (Pin 5/Pin 8): Open Drain Interrupt Output. After a
push button turn-off event is detected (tDB, OFF + tOFFT),
the LTC2951 interrupts the system (P) by bringing the
INT pin low. Once the system nishes its power down
and housekeeping tasks, it sets KILL low, which in turn
releases the enable output. If at the end of the power
down timer period (tKILL, OFF DELAY + tKILL, OFF DELAY, AD-
DITIONAL) KILL is still high, the enable output is released
immediately. INT may optionally be tied to KILL to release
the enable output immediately after the turn-off event has
been detected (INT low).
EN (LTC2951-1, Pin 6/Pin 7): Open Drain Enable Output.
This pin is intended to enable system power. EN goes high
after a valid PB turn on event (tDB, ON). EN goes low if: a)
KILL is not driven high within 512ms of the initial valid PB
power turn-on event, b) KILL is driven low during normal
operation, or c) a second valid PB event (power turn-off)
is detected. The operating range for this pin is 0V to 10V.
A 100k pull-up is recommended if not available in the
DC/DC converter.
EN (LTC2951-2, Pin 6/Pin 7): Open Drain Enable Output.
This pin is intended to enable system power. EN is asserted
low after a valid PB turn-on event (tDB, ON). EN releases
high if: a) KILL is not driven high within 512ms of the
initial valid PB power turn-on event, b) KILL is driven low
during normal operation, or c) a second valid PB event
(power turn-off) is detected. The operating range of this
pin is 0V to 10V. A 100k pull-up is recommended if not
available in the DC/DC converter.
OFFT (Pin 7/Pin 6): Additional Adjustable Turn Off Time
Input (tOFFT). A capacitor to ground determines the ad-
ditional time (beyond the internal default 32ms, tDB, OFF)
that the PB pin must be held low before initiating a power
down sequence (INT falling). Floating this pin results in a
default turn off debounce time of 32ms.
KILL (Pin 8/Pin 5): KILL Input. Forcing KILL low releases
the enable output. During system turn on, this pin is blanked
by a 512ms internal timer (tKILL, ON BLANK) to allow the
system to pull KILL high. This pin has an accurate 0.6V
threshold and can be used as a voltage monitor input.
Exposed Pad (Pin 9): Exposed Pad may be left open or
connected to device ground.
(TSOT-23/DFN)
PI FU CTIO S
UU
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2951IDDB-2#TRMPBF | 功能描述:IC PUSH BUTTON ON/OFF CTRLR 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| LTC2951IDDB-2#TRPBF | 功能描述:IC PUSH BUTTON ON/OFF CTRLR 8DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源控制器，监视器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 应用:多相控制器 输入电压:- 电源电压:9 V ~ 14 V 电流 - 电源:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:40-WFQFN 裸露焊盘 供应商设备封装:40-TQFN-EP（5x5） 包装:带卷 (TR) |
| LTC2951ITS8-1 | 制造商:Linear Technology 功能描述:Push Button Controller 8-Pin TSOT-23 |
| LTC2951ITS8-1#PBF | 制造商:Linear Technology 功能描述:MS-System Monitor/Other, Cut Tape Basic Push Button On/Off Controller (Adjustabl |
| LTC2951ITS8-1#TRM | 制造商:Linear Technology 功能描述:Push Button Controller 8-Pin TSOT-23 T/R |
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