AM1803 Datasheet, PDF (1/1 Pages) Cymbet Corporation – Ambiq AM1803 RTC Power Backup with EnerChip Battery

Ambiq AM1803 Real Time Clock
How2 Info Sheet
Ambiq AM1803 RTC Power Backup with EnerChip™ Battery
ECNBECR3C1H50IP-D^™_9C
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
AM1803
Iq (nA at 3V)
XXX
CBC3105
Back up Package Size
time (hrs) (mm x mm)
XXX
4x5
CBC3112
Back up Package Size
time (hrs) (mm x mm)
XXX
7x7
CBC3150
Back up Package Size
time (hrs) (mm x mm)
XXX
9x9
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
System power
• 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
C1
1.0uF
R1 R2
10K 10K
U1 CBC31XX
VCHG
VBAT
VMODE
EN
VIN
CP
CN
RESET
VOUT
C2
0.1uF
C3
1.0uF
R4
200K
Y1 _32.768KHz
16
U2
XI
1 _nc
XO
VSS
VCC
nc
12
2 _nc
3 _nc
FOUT/nIRQ ¹¹
AM1803
nc ¹⁰
4 _PSW/nIRQ2
VBAT SDA SCL
VSS ⁹
nc
5
6
7
8
Documentation
• 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
INT/ to MCU if needed
Power switch to other devices if needed
I2C SCL
I2C SDA
Cymbet EnerChip
CBC-EVAL-05B
Cymbet EnerChip
RTC CBC-EVAL-06
©2013 Cymbet Corporation • Tel: [phone] • 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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