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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

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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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