APL5521K

APL5521 Dual-Channel, 3.3V/500mA and 2.5V/300mA Linear Regulator Features • Fixed Output Voltage : VOUT1=3.3V/500mA VOUT2=2.5V/300mA Low Dropout Voltage (defined as the minimum input/output voltage difference): Output 1 Dropout Voltage : 1.25V (at 500mA) Output 2 Dropout Voltage : 1.2V (at 300mA) Stable with 10uF Output Capacitor(at VOUT1) Stable with 10uF Output Capacitor(at VOUT2) No Protection Diodes Needed Built in Thermal Protection Built in Current Limit Protection Fast transient Response Short Setting Time SOP-8 Package Available General Description The APL5521 is a dual low dropout regulator with output 1 with 3.3V/0.5A and output2 with 2.5V/0.3A output capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications, the APL5221 has been optimized. The dropout voltages are guaranteed at 1.25V at 0.5A for output1 and 1.2V 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 APL5521 regulator comes in a SOP-8 package. • • • • • • • • Pin Configuration SOP − 8 Applications • • • Desktop Computer Networking Systems Optical Data Storage Systems V O U T1 V IN V IN V O U T2 1 2 3 4 8 7 6 5 G ND G ND G ND G ND APL5521 Ordering and Marking Information APL5521 L e a d F re e C o d e H a n d lin g C o d e Tem p. R ange P a ck ag e C od e A P L5521 XXXXX P ackage C ode K : S O -8 O p e ra tin g J u n c tio n T e m p . R a n g e C : 0 to 1 5 0 ° C H a n d lin g C o d e TU : Tube TR : Tape & R eel L e a d F re e C o d e L : L e a d F re e D e v ic e B la n k : O rig in a l D e v ic e X X X X X - D a te C o d e A P L5521 K : 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.5 - Oct., 2003 1 www.anpec.com.tw APL5521 Pin Description No. 1 2 3 4 5 6 7 8 PIN Name VOUT1 VIN VIN VOUT2 GND GND GND GND I/O O I I O Description VOUT1 output Voltage 3.3V. sources up to 500 mA. Supply Voltage. Voltage can range from 4.75V to 8V Supply Voltage. Voltage can range from 4.75V to 8V VOUT2 output Voltage 2.5V. sources up to 300 mA. Ground also functions as a heatsink. Solder to the ground plane to maximize thermal dissipation Absolute Maximum Ratings Symbol VIN, VOUT RTH,JA PD TJ Parameter Input Voltage or Out Voltage Thermal Resistance – Junction to Ambient Power Dissipation Operating Junction Temperature Control Section Power Transistor TSTG TL Storage Temperature Range Lead Temperature (Soldering, 10 second) Rating 9 80 Internally Limited 0 to 125 0 to 150 -65 to +150 260 °C °C Unit V °C/W W °C Electrical Characteristics Unless otherwise noted these specifications apply over full temperature, TJ=0 to 125°C. Typical values refer to TJ=25°C. APL5521 Symbol Parameter Test Conditions Unit Min. Typ. Max. VIN IQ OTS Input Voltage Quiescent Current IOUT1=0mA, IOUT2=0mA Over Temperature Shutdown Over Temperature Hysteresis Shutdown Hysteresis Output Voltage Temperature Coefficient 4.75 10 150 10 50 8 16 V mA °C °C ppm/°C TC Copyright  ANPEC Electronics Corp. Rev. A.5 - Oct., 2003 2 www.anpec.com.tw APL5521 Electrical Characteristics (Cont.) Unless otherwise noted these specifications apply over full temperature, TJ=0 to 125°C. Typical values refer to TJ=25°C. APL5521 Symbol Parameter Test Conditions Unit Min. Typ. Max. Output1 (500mA) VOUT1 Output 1 Voltage Output 1 Current IOUT1 Capability REGLINE Line Regulation REGLOAD Load Regulation Load Transient VDROP Dropout Voltage (Note) 4.75< VIN