
Low IQ, Low Dropout 300mA Fixed Voltage Regulator
Copyright ANPEC Electronics Corp.
Rev. A.5 - Apr., 2003
APL5308/9
www.anpec.com.tw1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
SOT-23 (Top View)
APL5309
GND
12
3
VOUT VIN
APL5309
SOT-89 (Top View)
GND VINVOUT
123
TAB is GND
Features
The APL5308/9 series are micropower, low dropout
linear regulators, which operate from 2.7V to 6V in-
put voltage and deliver up to 300mA. T ypical dropout
voltage is only 400mV at 300mA loading. Designed
for use in battery-powered system, the low 60µA qui-
escent current makes it an ideal choice. Design with
an internal P-channel MOSFET pass transistor, the
APL5308/9 maintain a low supply current, indepen-
dent of the load current and dropout voltage. Other
features include thermal-shutdown protection current
limit protection to ensure specified output current and
controlled short-circuit current. The APL5308/9 regu-
lators come in a miniature SOT-23, SOT-23-5 and
SOT-89 packages.
Applications
• 5V to 3.3~4.5V Linear Regulators
• 3.3V to 1.5~2.5V Linear Regulators
• CD-ROM, CD-R/W and DVD Player
• Networking System, LAN Card, ADSL/Cable
Modem, Cable Set-Top Box
• PC Peripherals
••
••
• Low Quiescent Current : 60µA (No load)
••
••
• Low Dropout Voltage : 400mV (@300mA)
••
••
• Fixed Output Voltage : 1.5V ~ 4.5V
by step 0.1V increment
••
••
• Stable with 1uF Output Capacitor
••
••
• Stable with Aluminum, Tantalum or Ceramic
Capacitors .
••
••
• No Protection Diodes Needed
••
••
• Built in Thermal Protection
••
••
• Built in Current Limit Protection
••
••
• Controlled Short Circuit Current : 50mA
••
••
• Fast Transient Response
••
••
• Short Setting Time
••
••
• SOT-23 ,SOT-23-5 and SOT-89 Packages Pin Configuration
SOT-23 (Top View)
GND
12
3
VOUT
VIN
APL5308
General Description
VIN GND
VOUT NC
NC
123
45
SOT-23-5 (Top View)
APL5309
APL5308
SOT-89 (Top View)
GND VIN VOUT
123
TAB is VIN
VIN
GND VOUT
NCNC
123
45
SOT-23-5 (Top View)
APL5308