Document
AiT Semiconductor Inc.
www.ait-ic.com
A6318
REGULATOR CMOS LOW DROPOUT REGULATOR (LDO) 300mA ULTRA-LOW NOISE, ULTRA-FAST
DESCRIPTION
The A6318 is designed for portable RF and wireless applications with demanding performance and space requirements. The A6318 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The A6318 also works with low- ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The A6318 consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio.
The A6318 is available in SOT-25 package
ORDERING INFORMATION
Package Type
Part Number
SOT-25
A6318E5R-XX E5
A6318E5VR-XX
X: Output Voltage
Note
ADJ=Adjustable V: Halogen free Package
R: Tape & Reel
AiT provides all RoHS products
Suffix “V” means Halogen free package
FEATURES
Ultra-low noise for RF Application Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically 50μS) <0.01μA Standby Current When Shutdown Low Dropout:210mV@300mA Wide Operating Voltage Ranges: 2V to 6V TTL-logic-Controlled Shutdown Input Low Temperature Coefficient Current Limiting Protection Thermal Shutdown Protection Only 1μF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available Fast output discharge Available in SOT-25 Package
APPLICATION
Cellular and Smart Phones Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards MP3/MP4/MP5 Players Portable Information Appliances
TYPICAL APPLICATION
REV2.0
- JAN 2010 RELEASED, JAN 2012 UPDATED -
-1-
AiT Semiconductor Inc.
www.ait-ic.com
PIN DESCTRIPTION
A6318
REGULATOR CMOS LOW DROPOUT REGULATOR (LDO) 300mA ULTRA-LOW NOISE, ULTRA-FAST
Pin # 1 2
3
4 5
Symbol VIN GND
EN
BP/FB VOUT
Top View Function
Power Input Voltage Ground Chip Enable Pin with four options. active high with internal 8 MΩ pull down
Reference Noise Bypass. FB pin for adjustable version Output Voltage.
REV2.0
- JAN 2010 RELEASED, JAN 2012 UPDATED -
-2-
AiT Semiconductor Inc.
www.ait-ic.com
A6318
REGULATOR CMOS LOW DROPOUT REGULATOR (LDO) 300mA ULTRA-LOW NOISE, ULTRA-FAST
ABSOLUTE MAXIMUM RATING
VCC, Input Supply Voltage
-0.3V to +6V
EN Input Voltage
-0.3V to +VIN
Output Voltage
-0.3V to VIN+0.3V
BP Voltage
-0.3V to +6V
Output Current
300mA
Maximum Junction Temperature
125°C
Operating Temperature RangeNote1
-40°C to 85°C
Storage Temperature Range
-65°C to 125°C
Lead Temperature (Soldering, 10s)
300°C
Stresses beyond may cause permanent damage to the device. The.