CS8281
CS8281
5V/250mA, 5V/100mA Micropower
Low Dropout Regulator with ENABLE
Description
The CS8281 is a precision, dual 5V
micropower linear voltage regula-
tor. The switched primary output
(V
OUT1
) supplies up to 250mA
while the secondary (V
OUT2
) is
capable of supplying 100mA. Both
outputs have a maximum dropout
voltage of 600mV and low reverse
current. Quiescent current drain is
typically 150µA when supplying
100µA from each output.
The ENABLE input provides logic
level control of the primary output.
With the primary output disabled,
quiescent current drain is typically
100µA when supplying 100µA from
the secondary output.
The CS8281 is extremely robust
with protection provided for
reverse battery, short circuit, over-
voltage, and overtemperature on
both outputs.
The CS8281 is available in a 5-lead
D
2
PAK.
Features
s
5V, 250mA Primary Output
s
5V, 100mA Secondary
Output
s
3% Tolerance, Both
Outputs
s
ON/OFF Control for
Primary Output
s
Low Quiescent Current
Drain (100µA V
OUT2
)
s
Low Reverse Current
s
Protection Features
Reverse Battery (-15V)
74V Load Dump
Short Circuit
Overtemperature
Overvoltage (34V)
Absolute Maximum Ratings
Input Voltage.....................................................................................-15V to 74V
Power Dissipation .................................................................Internally Limited
Operating Temperature Range................................................-40¡C to +125¡C
Maximum Junction Temperature ...........................................-40¡C to +150¡C
Storage Temperature Range ....................................................-55¡C to +150¡C
Electrostatic Discharge (Human Body Model) ..........................................4kV
Lead Temperature Soldering
Reflow (SMD styles only)................16 sec. max above 183¡C, 230¡C peak
Block Diagram
Primary Output
V
IN
Current
Limit
+
-
Bandgap
Reference
Over
Voltage
Shutdown
Secondary Output
V
OUT2
Current
Limit
Pwr Gnd
+
-
V
OUT2
Sense
+
V
OUT1
Package Options
5 Lead D
2
PAK
Tab (Gnd)
ENABLE
V
OUT1
Sense
Gnd
Rev. 9/16/97
-
Thermal
Shutdown
1
1. V
IN
2. V
OUT1
3. Gnd
4. V
OUT2
5. ENABLE
Consult factory for 8L and 16L SO, 8L and
16L PDIP, 7L D
2
PAK and 5L TO-220.
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
