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dc2254af

DEMO MANUAL DC2254A

Linear Technology  Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417  

(408) 432-1900 

 

FAX

: (408) 434-0507 

 

www.linear.com

 

LINEAR TECHNOLOGY CORPORATION 2014

LT 0914 • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following 

AS IS

 conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for 

ENGINEERING DEVELOPMENT 

OR EVALUATION PURPOSES ONLY

 and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete 

in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety 

measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union 

directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date 

of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU 

OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS 

FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR 

ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims 

arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all 

appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or 

agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. 

LTC assumes no liability for applications assistance, 

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction 

is not exclusive

.

Please read the DEMO BOARD manual prior to handling the product

. Persons handling this product must have electronics training and 

observe good laboratory practice standards. 

Common sense is encouraged

.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-

tion engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

Summary of Contents for LTC2956

Page 1: ...ted from 250ms to 39 days L LT LTC LTM Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation All other trademarks are the property of their respective owners Board Photo The DC2254A allows easy access to all the pins necessary to configure the device Onboard jumpers and an 8 pin DIP switch provide a range of value options to set the wake uptimer wake upti...

Page 2: ... from this turret to GND if an arbitrary awake time is desired Use the relationship tAWAKETIME 13 3ms nF Set the AWAKE TIMER jumper to EXTERNAL if using this turret PB Thisturretisalreadydrivenbythepushbuttonpresent on the demoboard however if needed it can be driven by an external signal to simulate a pushbutton press LDO_IN Can be used to provide the LT3060 with power when the LDO_IN jumper is s...

Page 3: ...ic high is detected on the SLEEP pin The LTC2956 can be put into SHUTDOWNmodeifthepushbuttonisheldlowforlonger than a user defined tLONG period The SHUTDOWN mode is a very low power mode with the timer disabled entered through a press of the pushbut ton or a high pulse at the SLEEP input which lasts longer than tLONG A short press on the pushbutton brings the LTC2956 back into RUN mode On power up...

Page 4: ...4 dc2254af DEMO MANUAL DC2254A OPERATING PRINCIPLES Figure 2 LTC2956 1 Awake Time Set to 20ms Time Period Set to 250ms PBOUT EN 20ms AWAKE TIME 250ms TIME PERIOD ...

Page 5: ...5 dc2254af DEMO MANUAL DC2254A OPERATING PRINCIPLES Figure 3 LTC2956 1 Awake Time Set to 20ms Time Period Set to 250ms Showing Proper Turn On Sequence with ONALERT Signal PBOUT ONALERT EN ...

Page 6: ... dc2254af DEMO MANUAL DC2254A OPERATING PRINCIPLES Figure 4 LTC2956 1 Awake Time Set to 20ms Time Period Set to 250ms Showing Proper Shutdown Sequence with OFFALERT Signal PBOUT ONALERT EN 1 SEC OFFALERT ...

Page 7: ...k 1 16W 1 0402 VISHAY CRCW040235K7FKED 15 1 R4 Res Chip 47 5k 1 16W 1 0402 VISHAY CRCW040247K5FKED 16 1 R5 Res Chip 127k 1 16W 1 0402 VISHAY CRCW0402127KFKED 17 1 R6 Res Chip 210k 1 16W 1 0402 VISHAY CRCW0402210KFKED 18 1 R7 Res Chip 280k 1 16W 1 0402 VISHAY CRCW0402280KFKED 19 1 R8 Res Chip 383k 1 16W 1 0402 VISHAY CRCW0402383KFKED 20 6 R9 R10 R13 R19 R21 R23 Res Chip 100k 1 16W 1 0402 VISHAY CRC...

Page 8: ...T N CH SOT23 FAIRCHILD SEMI 2N7002 3 0 R17 RES 0402 OPT 4 1 R18 RES CHIP 430 1 16W 5 0402 VISHAY CRCW0402430RJNED 4 1 U1 I C QFN12UD 3X3 LINEAR TECH LTC2956IUD 1 DC2254A B Required Circuit Components 1 1 DC2254A1 GENERAL BOM 2 0 Q1 MOSFET N CH SOT23 OPT 3 1 R17 RES CHIP 430 1 16W 5 0402 VISHAY CRCW0402430RJNED 4 0 R18 RES 0402 OPT 4 1 U1 I C QFN12UD 3X3 LINEAR TECH LTC2956IUD 2 ...

Page 9: ...ROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 Monday August 11 2014 1 1 WAKE UP TIMER WITH PUSH BUTTON CONTROL KIM T SAL H N A LTC2956IUD 1 2 DEMO CIRCUIT 2254A SIZE DATE V E R O N C I SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential...

Page 10: ...UDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the goo...

Page 11: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Analog Devices Inc DC2254A B DC2254A A ...

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