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A6318 Dataheets PDF



Part Number A6318
Manufacturers AiT Semiconductor
Logo AiT Semiconductor
Description REGULATOR CMOS LOW DROPOUT REGULATOR
Datasheet A6318 DatasheetA6318 Datasheet (PDF)

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,.

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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. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated in the Electrical Characteristics are not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. NOTE1: The A6318 is guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the -40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. THERMAL RESISTANCENOTE2 Package θJA SOT25 250°C/W NOTE2: Thermal Resistance is specified with approximately 1 square of 1 oz copper θJC 130°C/W REV2.0   - JAN 2010 RELEASED, JAN 2012 UPDATED - -3- AiT Semiconductor Inc. www.ait-ic.com   A6318 REGULATOR CMOS LOW DROPOUT REGULATOR (LDO) 300mA ULTRA-LOW NOISE, ULTRA-FAST ELECTRICAL CHARACTERISTICSNOTE3 VIN=3.6V, EN=VIN, CIN=COUT=1μF, CBP=22nF, TA=25℃, unless otherwise noted Parameter Symbol Conditions Min Input Voltage Output Voltage Accuracy VIN ∆VOUT VIN=3.6V, IOUT=1mA 2 -2 Current Limit ILIM RLOAD=1Ω 400 Quiescent Current Dropout Voltage Line RegulationNote4 Load RegulationNote5 IQ VDROP ∆VLINE ∆VLOAD VEN>1.2V, IOUT=0mA IOUT=200mA, VOUT=2.8V IOUT=300mA, VOUT=2.8V VIN=3.6V to 5.5V, IOUT=1mA 1mA


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