Cymbet AM1803 Ambiq am1803 rtc power backup with enerchip battery Datasheet

Ambiq AM1803 Real Time Clock
How2 Info Sheet
Ambiq AM1803 RTC Power Backup with EnerChip™ Battery
IP™
ENERCH -D9C
0
5
1
3
CBC
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-toreach 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
AM1803
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
XXX
4x5
XXX
7x7
XXX
9x9
Advantages of Combining These Two Parts
C2
C1
1.0uF
CN
EN
RESET
VIN
VOUT
1
C3
1.0uF
R4
200K
2
3
4
R1
10K
R2
10K
16
U2
XI
13
0.1uF
VMODE
14
VBAT
System power
VSS
nc
VCC
nc
nc
FOUT/nIRQ
XO
AM1803
nc
nc
PSW/nIRQ2
VSS
VBAT
SDA
SCL
5
6
7
12
11
INT/ to MCU if needed
10
9
nc
8
Power switch to other devices if needed
I2C SCL
I2C SDA
Documentation
•
•
•
•
32.768KHz
CP
GND
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
VCHG
GND
•
•
•
•
•
•
•
Y1
U1 CBC31XX
15
Cymbet EnerChips are solid-state, rechargeable batteries with
the following characteristics when compared to conventional
rechargeable batteries:
Cymbet Application Note: AN-XXXX
Cymbet Evaluation Kits: CBC-EVAL-05B, CBC-EVAL-06
Data Sheets: Ambiq AM1803, 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
©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
Doc MD-72-0XX Rev A
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