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LTC2956 - Wake-Up Timer with Pushbutton Control

Datasheet

Videos Documentation

Datasheet

LTC2956 - Wake-Up Timer with Pushbutton Control

Reliability Data

R554 - Reliability Data

Product Selector Card

Press Release

High Voltage Micropower Wake-Up Timer with Pushbutton Control Provides Configurable Wake Times for Power Conscious Applications

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LTC2956 Footprints and Symbols

Overview

Features

1.5V to 36V Supply Input Range
Adjustable Wake-Up Period: 250ms to 39 Days
Adjustable Maximum Awake Time
0.8μA Quiescent Current
0.3μA Shutdown Current
Pushbutton Input with Debouncing
Low Leakage EN Output Allows DC/DC Converter Control (LTC2956-1)
High Voltage EN Output Drives External P-Channel MOSFET (LTC2956-2)
±25kV ESD HBM on PB Input
12-Lead 3mm × 3mm QFN and MSOP Packages

Typical Application

Description

The LTC®2956 is a micropower, wide input voltage range, configurable wake-up timer with pushbutton control. It periodically wakes up and turns on a connected system to perform tasks like monitoring temperature or capturing images. After completing the task, the LTC2956 turns the system off to conserve power.

The wake-up timer period can be adjusted from 250ms to 39 days using configuration resistors. The system awake time can be controlled by the input pulse at the SLEEP pin or adjusted by the capacitor at the ONMAX pin. The LTC2956 operates over a wide supply input range from 1.5V to 36V. The low 800nA quiescent current suits battery powered applications.

The pushbutton input allows the user to shutdown, turn on or reset the wake-up timer. With the timer in shutdown, the quiescent current drops to 300nA. The LTC2956 also provides three status outputs to indicate mode transitions and pushbutton events. Two versions are available for applications requiring either positive or negative enable polarities.

Packaging

3x3 QFN-12,MS-12

Order Info

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)^*
LTC2956CUD-2#TRPBF	QFN	12	C		$2.04
LTC2956IUD-2#TRPBF	QFN	12	I		$2.44
LTC2956CUD-2#PBF	QFN	12	C	$2.83	$1.98
LTC2956IMS-2#PBF	MSOP	12	I	$3.39	$2.38
LTC2956IUD-2#PBF	QFN	12	I	$3.39	$2.38
LTC2956IMS-1#PBF	MSOP	12	I	$3.39	$2.38
LTC2956IMS-1#TRPBF	MSOP	12	I		$2.44
LTC2956CUD-1#TRPBF	QFN	12	C		$2.04
LTC2956CMS-1#TRPBF	MSOP	12	C		$2.04
LTC2956CMS-2#TRPBF	MSOP	12	C		$2.04
LTC2956CMS-2#PBF	MSOP	12	C	$2.83	$1.98
LTC2956CUD-1#PBF	QFN	12	C	$2.83	$1.98
LTC2956IUD-1#PBF	QFN	12	I	$3.39	$2.38
LTC2956IUD-1#TRPBF	QFN	12	I		$2.44
LTC2956IMS-2#TRPBF	MSOP	12	I		$2.44
LTC2956CMS-1#PBF	MSOP	12	C	$2.83	$1.98

^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number	Description	Price	Documentation
DC2254A-A	LTC2956-1 Demo Board \| Wake-Up Timer with Pushbutton Control, EN Pin	$25.00	Design File Manual Schematic
DC2254A-B	LTC2956-2 Demo Board \| Wake-Up Timer with Pushbutton Control, /EN Pin	$25.00	Design File Manual Schematic