cs8183 ON Semiconductor, cs8183 Datasheet - Page 6

• Manufacturer Part Number: cs8183
• Description: Dual Micropower 200 Ma Low Dropout Tracking Regulator/line Driver
• Manufacturer: ON Semiconductor

Switched Application
the reference voltage on the V
continuously
V
voltage on the V
switched out (V
Reference Figure 14.
10 mF
External Capacitors
stability. Without them, the regulator outputs will oscillate.
Actual size and type may vary depending upon the
application load and temperature range. Capacitor effective
series resistance (ESR) is also a factor in the IC stability.
B+
V
V
REF
OUT
REF
The CS8183 has been designed for use in systems where
Output capacitors for the CS8183 are required for
C2
/ENABLE pin will be less than 1.0 mA when the
C1
2.0 mF
Figure 13. 400 mA Loading
on. Typically, the current into the
IN
V
GND
GND
Adj
V
V
NC
NC
GND
GND
NC
NC
V
V
ENABLE1
IN
OUT
IN1
OUT1
ADJ1
REF
can be at high impedance or at ground.)
pin (usually the ignition line) has been
/
ENABLE2
ENABLE
Figure 14.
V
V
GND
GND
V
V
REF
GND
GND
OUT2
ADJ2
V
V
REF
NC
NC
NC
NC
IN
IN2
/
/
REF
< 1.0 mA
/ENABLE pin is
C1
1.0 mF
Ignition
Switch
APPLICATION NOTES
V
5.0 V
400 mA
C2
20 mF
REF
V
http://onsemi.com
OUT
V
BAT
CS8183
6
400 mA Output Capability
increase capability. This can cause damage to an IC because
of mismatches in the output drivers. The tight tolerances in
tracking of the CS8183 allow their outputs to be combined
for increased performance. Figure 13 shows the circuit
connections needed to perform this function.
Worst−case is determined at the minimum ambient
temperature and maximum load expected.
desired value above the minimum. One possible purpose of
this would be to maintain the output voltage during brief
conditions of negative input transients that might be
characteristic of a particular system.
temperatures expected in the system. To maintain regulator
stability down to −40°C, a capacitor rated at that temperature
must be used.
REGULATOR®s is available in the SMART REGULATOR
application note, “Compensation for Linear Regulators.”
Calculating Power Dissipation in a Dual Output Linear
Regulator
regulator (Figure 15) is:
where:
PD(max) + { V IN (max) * V OUT1 (min) } I OUT1 (max)
Normally regulator outputs cannot be combined to
The output capacitors can be increased in size to any
The capacitors must also be rated at all ambient
More information on capacitor selection for SMART
The maximum power dissipation for a dual output
V
V
V
IN(max)
OUT1(min)
OUT2(min)
is the maximum input voltage,
) { V IN (max) * V OUT2 (min) } I OUT2 (max2)
) V IN (max)I Q
is the minimum output voltage from V
is the minimum output voltage from V
OUT1
OUT2
(1)
,
,