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PDF NJU7287 Data sheet ( Hoja de datos )
| Número de pieza | NJU7287 | |
| Descripción | Battery Backup Switching IC | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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Battery Backup Switching IC
NJU7287
GENERAL DESCRIPTION
The NJU7287 is a battery backup system IC with three regulators,
two voltage detectors, a battery switching system and their control
circuit. It switches the regulator output from main power supply
source to the backup battery when it detects main power supply
drop and also has two voltage detection outputs.
The NJU7287 employs an exclusive sequence on the battery
switching system which reduces the battery operation. Combining
the special sequence and its low operating current, it is well-suited
for battery backup systems of DSC, DVC and other portable devices.
The NJU7287 is available in small and thin packages of 8-lead
MSOP (TVSP) and 12-lead PCSP12-C3.
PACKAGE OUTLINE
NJU7287xRB1
(MSOP8 (TVSP8))
FEATURES
z Low Quiescent Current
:13µA max. / Normal operation
:2.1µA max. / Backup
z Low Dropout Voltage
:0.06V max. (IRO =3mA) / REG1
:0.3V max. (IOUT =23mA) / REG2
:0.06Vmax. (ICH=3mA) / REG3
z 3ch(REG1, REG2, REG3) Output Voltage :±2.0%
———————
z 2ch(CS, RESET) Detection Voltage
: ± 2.0%
z Exclusive Sequence
z Small Package NJU7287xRB1 : MSOP8 (TVSP8)*
*MEET JEDEC MO-187-DA / THIN TYPE
PIN CONFIGURATION
18
27
36
45
NJU7287xRB1
1.VSS
2.VCH
3.VBAT
4.CS
———————
5. RESET
6.VOUT
7.VIN
8.VRO
Ver.2012-07-18
-1-
1 page  
BLOCK DIAGRAM
VIN
CS
Voltage
Detector
VSW1
Voltage
Detector
RESET
Voltage
Detector
Short
Circuit
Protection
REG3
Short
Circuit
Protection
REG1
Short
Circuit
Protection
REG2
VSW2
Voltage
Detector
Switch
Control
NJU7287
VCH
VRO
VOUT
RESET
CS
VSS
Short
Circuit
Protection
VBAT
Ver.2012-07-18
-5-
5 Page 
NJU7287
Ver.2012-07-18
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
- 11 -
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet NJU7287.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NJU7286 | Battery Backup Switching IC | New Japan Radio |
| NJU7287 | Battery Backup Switching IC | New Japan Radio |
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