CS8101
CS8101
Micropower 5V, 100mA Low Dropout
Linear Regulator with RESET and ENABLE
Description
The CS8101 is a precision 5V
micropower voltage regulator with
very low quiescent current (70µA
typ at 100µA load). The 5V output is
accurate within ±2% and supplies
100mA of load current with a typi-
cal dropout voltage of only 400mV.
Microprocessor control logic
includes an ENABLE input and an
active RESET. This combination of
low quiescent current, outstanding
regulator performance and control
logic makes the CS8101 ideal for
any battery operated, microproces-
sor controlled equipment.
The active RESET circuit includes
hysteresis, and operates correctly at
an output voltage as low as 1V. The
RESET function is activated during
the power up sequence or during
normal operation if the output
voltage drops outside the regulation
limits by more than 200mV typ. The
logic level compatible ENABLE
input allows the user to put the reg-
ulator into a shutdown mode where
it draws only 20µA typical of quies-
cent current.
The regulator is protected against
reverse battery, short circuit, over
voltage, and thermal overload con-
ditions. The device can withstand
load dump transients making it
suitable for use in automotive envi-
ronments.
The CS8101 is functionally equiva-
lent to the National Semiconductor
LP2951 series low current regula-
tors.
Features
s
5V ±2% Output
s
Low 70µA Quiescent
Current
s
Active RESET
s
ENABLE Input for
ON/OFF and Active/Sleep
Mode Control
s
100mA Output Current
Capability
s
Fault Protection
+60V Peak Transient
Voltage
-15V Reverse Voltage
Short Circuit
Thermal Overload
s
Low Reverse Current
(Output to Input)
Package Options
20L SOIC Wide
(Internally Fused Leads)
ENABLE
1
Block Diagram
V
OUT
NC
V
IN
NC
Gnd
Gnd
Gnd
Gnd
NC
NC
NC
V
IN
Current Source
(Circuit Bias)
Over
Voltage
Shutdown
V
OUT
NC
NC
Gnd
Gnd
Gnd
Internally connected
on 5 lead TO-220
Gnd
NC
NC
ENABLE
Current Limit
Sense
V
OUT
Sense
RESET
5L TO-220
+
Thermal
Protection
8L SOIC
V
OUT
1
V
OUT
Sense
ENABLE
Gnd
V
IN
NC
NC
RESET
-
Error
Amplifier
Tab (Gnd)
Bandgap
Reference
RESET
+
-
Reset
Comparator
Gnd
1. V
OUT
2. ENABLE
3. Gnd
4. RESET
5. V
IN
Other Packages: D
2
PAK (consult factory)
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
Rev. 4/9/99
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
