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CAT6218
LDO, 300 mA
CAT6218
300 mA CMOS LDO
Regulator
Description
The CA T6218 is a 300 mA CMOS low dropout regulator that
provides fast response time during load current and line voltage
changes.
The quickïstart feature allows the use of an external bypass
capacitor to reduce the overall output noise without affecting the
turnïon time of just 150 s.
With zero shutdown current and low ground current of 55 A
typical, the CAT6218 is ideal for batteryïoperated devices with supply
voltages from 2.3 V to 5.5 V . An internal under voltage lockout circuit
disables the output at supply voltages under 2.1 V typical.
The CAT6218 offers 1% initial accuracy and low dropout voltage,
180 mV typical at 300 mA. Stable operation is provided with a small
value ceramic capacitor, reducing required board space and
component cost.
Other features include foldïback current limit and thermal
protection.
The device is available in the low profile (1 mm max height) 5ïlead
thin SOT23 package.
Features Guaranteed 300 mA Output Current Low Dropout V oltage of 180 mV Typical at 300 mA Stable with 1 F Ceramic Output Capacitor External 10 nF Bypass Capacitor for Low Noise Quickïstart Feature Noïload Ground Current of 55 A Typical Fullïload Ground Current of 80 A Typical ±1.0% Initial Accuracy (VOUT 2.0 V) ±2.0% Accuracy Over Temperature (VOUT 2.0 V) Zero Current Shutdown Mode Foldïback Current Limit and Underïvoltage Lockout Thermal Protection Thin SOT23ï5 Package These Devices are PbïFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications Cellular Phones Batteryïpowered Devices Consumer Electronics
http://
TSOTï23
TD SUFFIX
CASE 419AE
PIN CONNECTIONS
RUYM
MARKING DIAGRAM
(Top View)
VOUT
BYP
VIN
GND
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION
Supply voltage input.1
Ground reference.2
Enable input (active high); a 2.5 M
pullïdown resistor is provided.
Optional bypass capacitor connec-
tion for noise reduction and PSRR
enhancing.
LDO Output Voltage.5
FunctionPin #
PIN FUNCTION
Name
VIN
GND
BYP
VOUT
RU= CAT6218 Device Code = Production Year (last digit) = Production Month: 1 ï 9, A, B, C
