DS1336
Afterburner Chip
www.dalsemi.com
FEATURES
搂
Provides power switching of up to 1.5 amps at
voltages between 3.0 and 5.0 volts
搂
Five separate power switches
搂
Selectable battery switches for use with
搂
battery-backed systems
搂
Very low on impedance of 0.7O
搂
Battery backup current of 4 mA
搂
Diode-isolated battery path
搂
Available in 16-pin DIP or 16-pin SOIC
surface
搂
mount package
搂
Low voltage drop battery path
搂
Connects directly to a variety of Dallas
Semiconductor devices, adding increased
switching capability for large battery backup
current applications
PIN ASSIGNMENT
OUT5
PF
IN5
IN2
IN4
VBATIN
VBAT02
OUT4
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
/IN1
PF
GND
OUT1
OUT2
OUT3
VBAT01
IN3
16-Pin DIP (300-mil)
See Mach. Drawings
Section
OUT5
PF
IN5
IN2
IN4
VBATIN
VBAT02
OUT4
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
/IN1
PF
GND
OUT1
OUT2
OUT3
VBAT01
IN3
16-Pin DIP SOIC (300-mil)
See Mach. Drawings
Section
PIN DESCRIPTION
V
CC
/IN1
IN2 - IN5
OUT1 - 5
V
BATIN
V
BAT01
V
BAT02
PF,
PF
GND
- +5V Input and Input 1
- Inputs 2 - 5
- Outputs 1 - 5
- External Battery Input
- Diode Protected Battery Output
- Low Voltage Drop Battery
Output
- Power-fail Inputs
- Ground
DESCRIPTION
The DS1336 Afterburner Chip is designed to provide power switching between a primary power supply
(V
CC
) and a backup battery power supply (V
BAT
). Five V
CC
and two battery paths are provided which can
be used individually or in parallel to supply uninterrupted power in applications such as SRAM networks.
When used with one of the Dallas power monitoring devices listed in Table 1, the DS1336 allows a load
to be switched from its main power supply V
CC
to a battery backup supply when V
CC
falls out of
tolerance. A user may selectively tie together any combination of the output pins to provide the desired
high current supply, providing up to 300 mA per OUT pin or a maximum of 1.5A. Depending upon the
user鈥?backup supply load requirements, either of the V
BAT
outputs may be tied to the OUT pins to supply
s
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1
2
3
4
5
6
