Dual Channel 500mA Regulator + Reset IC
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Jul., 2003
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.
APL5525/5526
• Low Quiescent Current : 130µA (No load)
• Low Dropout Voltage :
VDROP1=550mV@500mA
VDROP2=630mV@500mA
• Fixed Output Voltage :
VOUT1=3.3V/500mA
VOUT2=2.5V/500mA
• Stable with 4.7µF Output Capacitor
• Stable with Aluminum, Tantalum or Ceramic
Capacitors
• Reverse Current Protection
• No Protection Diodes Needed
• Built in Thermal Protection
• Fast Transient Response
• Short Setting Time
• SOP-8, SOP-8-P with Thermal Pad Packages
• Adjustment-free Reset Detection Voltage :
3.9V or 4.2V typ
• Easy to Set Delay Time from Voltage
Detection to Reset Release
Features General Description
The APL5525/6 is a dual-channel regulator with reset
function (specific voltage monitoring), and internal
delay circuit, set to detect 3.9V or 4.2V. Maximum
input voltage is 6V, output1 and output2 deliver up to
500mA. VOUT1 typical dropout voltage is 550mV at
500mA loading and VOUT2 typical dropout voltage is
630mV at 500mA loading. Design with an internal P-
channel MOSFET pass transistor, the APL5525/6
maintains a low supply current. Other features include,
thermal-shutdown protection, current limit protection
to ensure specified output current. The APL5525/6
come in miniature SOP-8 and SOP-8-P packages.
Applications
• CD-ROM drive.
Pin Configuration
RESET GND
1
2
3
8
6
4
7
5
CONT
V IN
V DET
Cd
V OUT1
V OUT2
RESET GND
1
2
3
8
6
4
7
5
CONT
V IN
V DET
Cd
V OUT1
V OUT2
SOP-8 Top View
RESET GND
1
2
3
8
6
4
7
5
CONT
V IN
V DET
Cd
V OUT1
V OUT2
SOP-8-P Top View
APL5525 APL5526
= Thermal Pad
(connected to GND plane for better heat
dissipation)
RESET GND
1
2
3
8
6
4
7
5
CONT
V IN
V DET
Cd
V OUT1
V OUT2