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PDF A6318 Data sheet ( Hoja de datos )
| Número de pieza | A6318 | |
| Descripción | REGULATOR CMOS LOW DROPOUT REGULATOR | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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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-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A6318
REGULATOR CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST
TYPICAL PERFORMANCE CHARACTERISTICS
1. Output Voltage vs. Temperature
2. Quiescent Current vs. Temperature
3. Dropout Voltage vs. Load Current
4. PSRR
5. EN Pin Shutdown Threshold vs. Temperature
6. EN Pin Shutdown Response
REV2.0
- JAN 2010 RELEASED, JAN 2012 UPDATED -
-5-
5 Page 
AiT Semiconductor Inc.
www.ait-ic.com
A6318
REGULATOR CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST
For this operating condition, TJ is lower than the absolute maximum operating junction temperature, 125°C,
so it is safe to use the A6318 in this configuration.
Layout considerations
To improve ac performance such as PSRR, output noise, and transient response, it is recommended that the
PCB be designed with separate ground planes for VIN and VOUT, with each ground plane connected only at the
GND pin of the device. In addition, the ground connection for the bypass capacitor should connect directly to
the GND pin of the device.
A6318-2.8V Layout Circuit
REV2.0
- JAN 2010 RELEASED, JAN 2012 UPDATED -
- 11 -
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet A6318.PDF ] | |
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