1
Features
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5V, 250mA Primary Output
5V, 100mA Secondary
Output
3% Tolerance, Both
Outputs
ON/OFF Control for
Primary Output
Low Quiescent Current
Drain (100μA V
OUT2
)
Low Reverse Current
Protection Features
Reverse Battery (-15V)
Short Circuit
Overtemperature
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Package Options
C
5V/250mA, 5V/100mA Micropower
Low Dropout Regulator with ENABLE
Description
CS8391
V
IN
ENABLE
+
-
Secondary Output
Primary Output
Current
Limit
Current
Limit
V
OUT1
Thermal
Shutdown
Bandgap
Reference
+
-
V
OUT2
+
-
V
OUT2
Sense
V
OUT1
Sense
Gnd
*
*
*
Note: Internally
connected on 5 leaded
package.
Block Diagram
Absolute Maximum Ratings
Input Voltage.....................................................................................-15V to 45V
Power Dissipation.................................................................Internally Limited
Operating Temperature Range................................................-40C to +125C
Maximum Junction Temperature ...........................................-40C to +150C
Storage Temperature Range ....................................................-55C to +150C
Electrostatic Discharge (Human Body Model) ..........................................4kV
Lead Temperature Soldering
Wave Solder (through hole styles only)..........10 sec. max, 260C peak
Reflow (SMD styles only)...........60 sec. max above 183C, 230C peak
The CS8391 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 CS8391 is extremely robust
with protection provided for
reverse battery, short circuit, and
overtemperature on both outputs.
The CS8391 is available in a 5-lead
D
2
PAK.
5 Lead D
2
PAK
Tab (Gnd)
1
Consult factory for 8L and 16L SO, 8L and
16L PDIP, 7L D
2
PAK and 5L TO-220.
1. V
IN
2. V
OUT1
3. Gnd
4. V
OUT2
5. ENABLE
A
Company
¨
Rev. 1/12/98
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