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Doc MD-72-0XX Rev A

©2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com

Cymbet, the Cymbet Logo and EnerChip are trademarks of Cymbet Corporation. All Rights Reserved

GND

EN

VCC

RESET/

SDA

SCL

IRQ*/CLK

C5

C5

C3

1.0uF

C3

1.0uF

Y1

32.768KHz

Y1

32.768KHz

U1 MCP7941X

U1 MCP7941X

X2

2

VSS

4

SDA

5

VBAT

3

VCC

8

X1

1

SCL

6

IRQ/CLK

7

R1

R1

U2 CBC31XX

U2 CBC31XX

EN

VBAT

VOUT

VIN

RESET

VMODE

CN

CP

VCHG

R2

R2

C4

C4

C1

0.1uF

C1

0.1uF

R3

R3

C2

1.0uF

C2

1.0uF

Page 1 of 1

Doc MD-72-0XX Rev A

©2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com

Cymbet, the Cymbet Logo and EnerChip are trademarks of Cymbet Corporation. All Rights Reserved

Applications

EnerChips are an attractive RTC backup alternative to batteries or supercapacitors, especially when the

finished product has limited PCB space, size constraints or needs to be sealed or installed in a hard-to-

reach location. They are also excellent if you have any of these design requirements:

• Battery must be RoHS and WEEE compliant

• Product can be discarded without removing battery

• Product must have battery installed during shipping via air

• Battery must be rechargeable to support a lifetime of power outages

• Battery must provide backup power for several hours during a main power failure

Advantages of Combining These Two Parts

Cymbet EnerChips are solid-state, rechargeable batteries with

the following characteristics when compared to conventional

rechargeable batteries:

• Low self-discharge

• Are solder reflow tolerant

• Flat discharge voltage profile

• High charge/discharge cycle life

• Simple voltage controlled charging

• Have no flammable solvents to leak or catch fire

• Are offered in low profile surface mount packages

Microchip MDP79410 Real Time Clock

How2 Info Sheet

Microchip MDP79410 RTC Power Backup with EnerChip™ Battery

MDP79410

CBC3105

CBC3112

CBC3150

Iq (nA at 3V)

Back up

time (hrs)

Package Size

(mm x mm)

Back up

time (hrs)

Package Size

(mm x mm)

Back up

time (hrs)

Package Size

(mm x mm)

XXX

XX

4 x 5

XXX

7 x 7

XXX

9 x 9

Documentation

• Cymbet Application Note: AN-1046

• Cymbet Evaluation Kits: CBC-EVAL-05B, CBC-EVAL-06

• Data Sheets: Microchip MDP79410, CBC3105, CBC3112, CBC3150

• All Cymbet Documents and Downloads: http://www.cymbet.com/products/datasheets-downloads.php

Evaluation Kits

Cymbet EnerChip

RTC CBC-EVAL-06

Cymbet EnerChip

CBC-EVAL-05B

ENERCHIP

™

CBC3150-D9C