AiT Semiconductor Inc.
www.ait-ic.com
A6303D
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
REV1.2 - OCT 2019 RELEASED, JAN 2020 UPDATED - - 1 -
DESCRIPTION
FEATURES
The A6303D series are highly precise, low noise
positive voltage LDO regulators manufactured
using CMOS processes. The A6303D achieves
high ripple rejection and low dropout and consists
of a voltage reference, an error amplifier, a
current limiter and a phase compensation circuit
plus a driver transistor.
The A603D is also compatible with low ESR
ceramic capacitors which give added output
stability. This stability can be maintained even
during load fluctuations due to the excellent
transient response of the series. The current
limiter’s foldback circuit also operates as a short
protect for the output current limiter and the output
pin. The EN function enables the output to be
turned off, resulting in greatly reduced power
consumption.
The A6303D is available in SOT-25, SC-70-5 and
DFN4 (1x1) packages.
Maximum Output Current: 300mA
Low Dropout: 140mV@300mA (V
OUT
=2.8V)
Wide Operating Voltage Ranges: 1.8V to 5.5V
Ultra-low Noise
Ultra-Fast Transient Response
High PSRR: -87dB @ 217Hz
-83dB @ 1kHz
-54dB @ 1MHz
0.1μA Standby Current When Shutdown
Current Limiting and Short Circuit
Current Protection
Thermal Shutdown Protection
Only 1μF Output Capacitor Required for Stability
Fast output discharge
Available in SOT-25, SC70-5 and DFN4(1x1)
packages
APPLICATION
Smart Phones, Mobile Phones, Cordless Phones
Wireless communication equipment
Portable games, Portable AV equipment
Camera and Machine Vision Modules
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Reference Voltage
ORDERING INFORMATION
Package Type
Part Number
SOT-25
SPQ: 3,000pcs/Reel
E5
A6303DE5R-XX
A6303DE5VR-XX
SC70-5
SPQ: 3,000pcs/Reel
C5
A6303DC5R-XX
A6303DC5VR-XX
DFN4(1x1)
SPQ: 5,000pcs/Reel
J4
A6303DJ4R-XX
A6303DJ4VR-XX
Note
XX: Output Voltage
10=1.0V, 33=3.3V
V: Halogen free Package
R: Tape & Reel
TYPICAL APPLICATION
AiT Semiconductor Inc.
www.ait-ic.com
A6303D
CMOS LOW DROPOUT REGULATOR (LDO)
300mA ULTRA-LOW NOISE, ULTRA-FAST RESPONSE
REV1.2 - OCT 2019 RELEASED, JAN 2020 UPDATED - - 2 -
PIN DESCRIPTION
Top View
Top View
Top View
Pin #
Symbol
Function
SOT-25, SC70-5
DFN4(1x1)
1
4
V
IN
Power Input Voltage
2
2
GND
Ground
3
3
EN
Chip Enable Pin, This pin has an internal pull-down resistor
4
-
NC
No Connection
5
1
V
OUT
Output Voltage
-
Exposed Pad
-
The exposed pad should be connected to a large ground
plane to maximize thermal performance.