AP7331
300mA, LOW QUIESCENT CURRENT, FAST TRANSIENT
LOW DROPOUT LINEAR REGULATOR
AP7331
Document number: DS31914 Rev. 3 - 2
1 of 13
www.diodes.com
January 2011
© Diodes Incorporated
Description
The AP7331 is a 300mA, adjustable and fixed output
voltage, low dropout linear regulator. The device included
pass element, error amplifier, band-gap, current limit and
thermal shutdown circuitry. The device is turned on when EN
pin is set to logic high level.
The characteristics of low dropout voltage and low quiescent
current make it suitable for low power applications, for
example, battery powered devices. The typical quiescent
current is approximately 65μA.
Built-in current-limit and thermal-shutdown functions prevent
IC from damage in fault conditions.
The AP7331 is available in SOT25 and DFN2020-6
packages.
Pin Assignments
Features
• 300mA Low Dropout Regulator with EN
• Very low I
Q
over full load: 65µA
• Wide input voltage range: 2V to 6V
• Wide adjustable output: 0.8V to 5.0V
• Fixed output options: 1.0V to 3.3V
• PSRR: 65dB typical at 100Hz
• Fast start-up time: 80µs
• Stable with low ESR, 1µF ceramic output capacitor
• Excellent Load/Line Transient Response
• Low dropout: 300mV typical at 300mA
• Current limit protection
• Short circuit protection
• Thermal shutdown protection
• Ambient temperature range: -40ºC to 85°C
• SOT25 and DFN2020-6: Available in “Green” Molding
Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant (Note 1)
Applications
• XDSL Routers
• Wireless LAN Cards
• Desktop and Notebook Computers
• Battery Powered Equipments
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html
IN
EN
OUT
5
3
2
1
GND
NC
4
GND
OUT
4IN
EN
NC
5
3
2
1
NC
6
GND
OUT
4
IN
EN
NC
5
3
2
1
ADJ
6
SOT25 (Fixed Output)
(Top View)
SOT25 (ADJ Output)
(Top View)
DFN2020-6 (Fixed Output)
(Top View)
DFN2020-6 (ADJ Output)
(Top View)
