PS22921 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 12V, 500mA Fast Transient Response Linear Regulator

PS22921
12V, 500mA Fast Transient Response Linear Regulator
Preliminary
Features
• VIN Range 1.7 – 12V
• Fixed and adjustable output voltage
• 500mA maximum output current
• 300mV typical dropout voltage
• Bypass output for low PSRR and output noise
• Power Good pin with 500µs delay
• Low self noise
• Shutdown mode for longer battery life
• High PSRR typically 60dB at 100Hz
• Stable with a wide range of Ceramic, Tantalum
or Electrolytic capacitors
• Current limit protection
• Thermal Shutdown
• -40°C to 125°C temperature range
• Available in SOT23-5
Applications
• Set Top Boxes
• Digital Audio systems
• DSP
• POL regulators
• SMPS post regulator
Typical Application
Data Sheet 292203 issue 1 Mar-13
Description
The PS22921 is a high performance, precision linear regulator
with very low dropout voltage and excellent transient response.
It is designed to operate with wide input voltage range of 1.7 –
12 Volts making it ideal for two step conversion. The device is
capable of supplying 500mA of output current with a typical
dropout voltage of 300mV. The output Voltage is available in
either fixed or adjustable options. For fixed option, the internal
resistor network can be set in 100mV increment ranging from
0.5 to 5.0 volts.
The product includes an Enable pin for electrical on/off of the
regulator. Forcing the Enable pin to logic low shuts down the
LDO and reduces the supply current below 1µA. The PS22921
features fast transient response and low self output noise.
Connecting a capacitor form ByPass to GND further enhances
the PSRR and the output noise.
An open collector power good flag with 500µs delay is available
for systems requiring supply monitoring and sequencing of
other supplies. The regulator features the full suite of protection
with a combination of current limit and thermal overload
protection.
The PS22921 is available in SOT23-5 and it is rated for -40°C
to +125°C junction temperature range.
Vin = 1.7 – 12v
Plessey Semiconductors Ltd, Tamerton Road, Roborough, Plymouth, UK PL6 7BQ
Data Sheet 292203 issue 1
Tel: [phone]
Fax: [phone]
Web: www.plesseysemiconductors.com
email: [e-mail]; October 12, 2010
1