ANPEC APL5523 Service Manual
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APL5523
Dual-Channel, 3.3V/500mA and 1.8V/300mA Linear Regulator
Features General Description
••
• Fixed Output Voltage :
••
VOUT1=3.3V/500mA
VOUT2=1.8V/300mA
••
• Low Dropout Voltage (defined as the minimum
••
input/output voltage difference):
Output 1 Dropout Voltage : 0.6V (at 500mA)
Output 2 Dropout Voltage : 0.9V (at 300mA)
••
• Stable with 4.7uF Output Capacitor(at VOUT1)
••
Stable with 2.2uF Output Capacitor(at VOUT2)
••
• Built in Thermal Protection
••
••
• Built in Current Limit Protection
••
••
• Fast transient Response
••
••
• Short Setting Time
••
••
• SOP-8 and SOP-8-P Package Available
••
Applications
• Desktop Computer
• Networking Systems
• Optical Data Storage Systems
The APL5523 is a dual low dropout regulator with
output1 with 3.3V/0.5A and output2 with 1.8V/0.3A
output capability. In order to obtain lower dropout
voltage and faster transient response, which is critical for low voltage applications, the APL5223 has
been optimized. The dropout voltages are guaranteed at 0.6V at 0.5A for output1 and 0.9V at 0.3A for
output 2. Current limit is trimmed to ensure specified output current and controlled short-circuit current.
On-chip thermal limiting provides protection against
any combination of overload that would create excessive junction temperatures. The APL5523 regu-
lator comes in a SOP-8 and SOP-8-P package.
Pin Configuration
SOP−8 (Top View)
OUT1
V
V
OUT2
1
IN
2
V
IN
V
3
4
= Thermal Pad
(connected to GND plane for better heat
dissipation)
SOP-8-P (Top View)
8
7
6
5
GND
GND
GND
GND
V
V
OUT1
V
V
OUT2
1
IN
2
IN
3
4
8
NC
GND
7
6
NC
5
NC
Ordering and Marking Information
APL5523
Lead Free Code
Handling Code
Tem p. Range
Package Code
APL5523 K/KA :
APL5523
XXXXX
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.
Copyright ANPEC Electronics Corp.
Rev. A.1 - July., 2004
Package Code
K : S OP-8 K A : S O P-8-P
Operating Junction Tem p. Range
C : 0 to 1 5 0° C
Handling Code
TU : Tube TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
XXXXX - Date Code
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APL5523
Pin Description
PIN
No. Name
1 V
OUT1
O V
I/O Description
OUT1
output Voltage 3.3V. sources up to 500 mA.
2 VIN I Supply Voltage.
3 VIN I Supply Voltage.
4 V
OUT2
O V
OUT2
output Voltage 1.8V. sources up to 300 mA.
5 GND
6 GND
7 GND
Ground also functions as a heatsink. Solder to the ground plane to
maximize thermal dissipation
8 GND
Absolute Maximum Ratings
Symbol Parameter Rating Unit
OUT
VIN, V
R
R
Input Voltage or Ou t Voltage 6 V
TH,JA
Thermal Resistance – Junction to Ambient
TH,JC
PD
TJ
SOP-8 150
SOP-8-P 75
Thermal Resistance – Junction to Case
SOP-8 30
SOP-8-P 5
Po w e r Dissipation Inte rn a lly L imited W
Operating Junction Temperature
°C/W
°C/W
°C
Control Section 0 to 125
Power Transistor 0 to 150
TST G Storage Temperature Range -65 to +150
TL Lead Temperature (Soldering, 10 second) 260
°C
°C
Electrical Characteristics
Unless otherwise noted these specifications apply over full temperature, CIN=1µF, COUT1=4.7µF,
COUT2=2.2µF, TJ=0 to 125°C. Typical values refer to TJ=25°C.
Symbol Parameter Test Conditions
VIN Input Voltage 2.7 6 V
SHORT
I
Short Current V
OTS
Over Temperature
Shutdown
Over Temperature
Shutdown Hysteresis
=0V 50 mA
OUT
150 °C
Hysteresis 20 °C
Output Voltage
TC
Temperature
100 ppm/°C
Coefficient
I
IQ Quiescent Current
Copyright ANPEC Electronics Corp.
Rev. A.1 - July., 2004
OUT1
I
OUT1
=500mA, I
=0mA, I
=300mA 900 1000
OUT2
=0mA 100 200
OUT2
APL5523
Min. Typ. Max.
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Unit
µA
APL5523
Electrical Characteristics (Cont.)
Unless otherwise noted these specifications apply over full temperature, CIN=1µF, COUT1=4.7µF,
C
OUT2=2.2µF, T
Symbol Parameter Test Conditions
Output1 (500mA)
V
Output Voltage VIN=5V
OUT
I
Circuit Current Limit
LIMIT
I
OUT
REG
REG
Line Regulation V
LINE
LOAD
PSRR Ripple Rejection F≤1kHz, 1Vpp at I
V
Dropout Voltage
DROP
C
Output Capacitor 4.7 µF
OUT
ESR 0.01 0.1 1 Ohm
Output2(300mA)
V
Output Voltage VIN=5V
OUT
I
Circuit Current Limit
LIMIT
I
OUT
REG
REG
Line Regulation V
LINE
LOAD
PSRR Ripple Rejection F≤1kHz, 1Vpp at I
V
Dropout Voltage
DROP
C
Output Capacitor 2.2 µF
OUT
ESR 0.01 0.1 1 Ohm
Note1 : Dropout voltage definition : VIN-VOUT when VOUT is 2% below the value of VOUT for VIN = VOUT+1V
=0 to 125°C. Typical values refer to TJ=25°C.
J
IN=VOUT
V
Load Current
VIN=V
OUT
Load Regulation VIN =V
(Note1)
I
OUT
IN=VOUT
V
Load Current
VIN=V
OUT
Load Regulation VIN =V
(Note1)
I
OUT
+1V
OUT
+1V 500 mA
+1V< VCC<6.0V, I
+1V, 0mA< I
OUT
=500mA 0.6 0.7 V
+1V
OUT
+1V 300 mA
+1V< VCC<6.0V, I
+1V, 0mA< I
OUT
=300mA 0.9 1 V
APL5523
Min. Typ. Max.
V
OUT
-2%
3.3
V
OUT
+2%
Unit
V
900 mA
=1mA 5 10 mV
OUT
-2%
40
1.8
60 mV
V
OUT
+2%
V
< I
OUT
MAX
=50mA 40 48 dB
OUT
V
OUT
900 mA
=1mA 4 10 mV
OUT
< I
OUT
MAX
=50mA 45 55 dB
OUT
20
40
mV
Application Circuit
OUT1
V
4.7µF
V
IN
1µ
V
Copyright ANPEC Electronics Corp.
Rev. A.1 - July., 2004
OUT2
1
2
F
3
4
µ
F
2.2
APL5523
8
7
6
5
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APL5523
Typical Characteristics
Quiescent Current vs. Input Voltage
160
I
140
120
100
80
60
40
Quiescent Current (µA)
20
0
0123456
OUT1=IOUT2
=0mA
Input Voltage (V)
Output Voltage vs. Input Voltage
3.5
3
I
OUT1=IOUT2
=0mA
V
OUT1
Quiescent Current vs. Output Current
600
OUT1
500
V
OUT2
400
300
200
Quiescent Current (µA)
100
0
0 100 200 300 400 500
Output Current (mA)
Output1 Voltage vs. Temperature
3.310
3.305
I
OUT1
VIN=5VV
=0m A
2.5
2
1.5
1
Output Voltage (V)
0.5
0
012345
Input Voltage (V)
Copyright ANPEC Electronics Corp.
Rev. A.1 - July., 2004
3.300
3.295
V
OUT2
3.290
Output1 Voltage (V)
3.285
3.280
-40-20020406080100120140
T emperature (°C)
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