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150kHz 3A BUCK DC-DC CONVERTER AP3003

Data Sheet

Aug. 2008 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

General Description

The AP3003 series of regulators are fixed frequency

PWM buck (step-down) DC/DC converter, capable of

driving a 3A load with excellent line and load regula-

tion. These regulators include internal frequency com-

pensation and a fixed frequency oscillator so that they

are easy to use. A system adopting AP3003 requires a

minimum number of external components to work.

A standard series of inductors, optimized for use with

the AP3003 series, are available from several manu-

facturers. This feature greatly simplifies the design of

switch-mode power suppl ies.

These ICs are available in TO-220-5 and TO-263-5

packages.

Features

· 3.3V, 5V, 12V Fixed (±4% Tolerance) and Adjust-

able (±3% Tolerance) Output Versions

· Guaranteed 3A Output Load Current

· 150kHz Fixed Frequency Internal Oscillato r

· Input Voltage Range up to 32V

· Requires only 4 external components

· High Efficiency up to 90%

· Excellent Line and Load Regulat ion

· TTL Shutdown Capability

· Low Power Standby Mode, I

Typically 80µA

· Built-in Current Limit Protection and Thermal

Shutdown Circuit

Applications

· LCD Monitor and LCD TV

· On-Card DC-DC Converter

· DVD Recorder

· PDP

Figure 1. Package Types of AP3003

TO-220-5

TO-263-5

Summary of content (16 pages)

PAGE 1
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 General Description Features The AP3003 series of regulators are fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A load with excellent line and load regulation. These regulators include internal frequency compensation and a fixed frequency oscillator so that they are easy to use. A system adopting AP3003 requires a minimum number of external components to work.
PAGE 2
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Pin Configuration S Package (TO-263-5) T Package (TO-220-5) 5 4 3 2 1 ON/OFF FEEDBACK GND OUTPUT VIN 5 4 3 2 1 ON/OFF FEEDBACK GND OUTPUT VIN Metal Tab GND Metal Tab GND Figure 2. Pin Configuration of AP3003 (Top View) Pin Description Pin Number Pin Name 1 VIN 2 OUTPUT 3 GND 4 FEEDBACK 5 ON/OFF Function Unregulated input voltage Switch driver output Ground Feedback Pin. For fixed version, connect it to system output.
PAGE 3
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Functional Block Diagram ON/OFF 5 1 1.23V REFERENCE 220 mV 2.5V REGULATOR 200 mV VIN 4.4Ω START UP + Bias Current 2.5V COMP Frequency Shift _ 150KHz OSC _ COMP + FEEDBACK 4 1:100 + R2 + _ R1 _ EA LATCH COMP DRIVER & INV 2 For 3.3V R1=2.49kΩ 5V R1=2.49kΩ 12V R1=2.49kΩ ADJ R1=Open THERMAL SHUTDOWN R2=4.18kΩ R2=7.57kΩ R2=21.8kΩ R2=0Ω 3 OUTPUT GND Figure 3. Functional Block Diagram of AP3003 Aug. 2008 Rev. 1.
PAGE 4
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Ordering Information AP3003 E1: Lead Free G1: Green Circuit Type TR: Tape and Reel Blank: Tube ADJ: Adjustable Output 3.3: Fixed Output 3.3V 5.0: Fixed Output 5.0V 12: Fixed Output 12V Package T: TO-220-5 S: TO-263-5 Package TO-220-5 Temperature Range -40 to 85oC Part Number Lead Free Marking ID Green Lead Free Green Packing Type AP3003T-ADJE1 AP3003T-ADJG1 AP3003T-ADJE1 AP3003T-ADJG1 Tube AP3003T-3.3E1 AP3003T-3.3G1 AP3003T-3.
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Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Input Voltage VIN 40 V ON/OFF Pin Voltage VON/OFF 40 V Feedback Pin Voltage VFB 40 V TJ 150 oC RθJA 60 oC/W TLEAD 260 TSTG -65 to 150 Operating Junction Temperature TO-220-5 Thermal Resistance (Junction to Ambient, No Heatsink) TO-263-5 Lead Temperature (Soldering, 10sec) Storage Temperature Range o C oC Note 1: Stresses greater than those listed under "Absolute
PAGE 6
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Electrical Characteristics For 3.3V Output Voltage Version Unless otherwise specified, TJ=25oC. The specifications with boldface type apply over Full Operating Junction Temperature Range. Parameter Output Voltage Efficiency Symbol VOUT η Conditions 5.5V≤VIN≤32V, 0.2A≤ILOAD≤3A Min Typ Max Unit 3.168 3.135 3.3 3.432 3.465 V VIN=12V, ILOAD=3A 75 % For 5V Output Voltage Version Unless otherwise specified, TJ=25oC.
PAGE 7
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Electrical Characteristics (Continued) For All Output Voltage Versions Unless otherwise specified , VIN=12V for 3.3V, 5V and adjustable version, ILOAD=500mA, TJ Range. =25oC. Parameter Feedback Bias Current Oscillator Frequency VIN=24V for 12V version, Specifications with boldface type apply over Full Operating Junction Temperature Symbol IFB f Conditions Min Adjustable Version Only, VFB=1.
PAGE 8
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 90.0 90.0 87.5 87.5 85.0 85.0 82.5 82.5 80.0 80.0 Efficiency (%) Efficiency (%) Typical Performance Characteristics 77.5 75.0 72.5 70.0 67.5 77.5 75.0 72.5 70.0 67.5 65.0 65.0 3.3V Version O VIN=12V, TJ=25 C 62.5 60.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 5.0V Version O VIN=12V, TJ=25 C 62.5 60.0 0.0 3.5 0.5 1.0 Output Current (A) 2.0 2.5 3.0 3.5 Figure 5. Efficiency vs. Output Current 90.0 90.0 87.5 87.5 85.0 85.0 82.5 82.
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Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Typical Performance Characteristics (Continued) 92.5 0.20 90.0 0.16 Output Voltage Change (%) 87.5 85.0 Efficiency (%) 82.5 80.0 77.5 75.0 72.5 O IOUT=3A, TJ=25 C 3.3V Version 5.0V Version 12V Version ADJ Version (VOUT=2.5V) 70.0 67.5 65.0 62.5 4 8 12 16 20 24 28 0.08 0.04 0.00 -0.04 -0.08 VOUT=5.0V ILOAD=0.1A -0.12 -0.16 O TJ=25 C -0.20 60.0 0 0.12 32 0 36 4 8 12 1.6 5.04 1.5 Switch Saturation Voltage (V) 5.
PAGE 10
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 5.50 4.5 5.25 4.0 3.5 5.00 Quiescent Current (mA) Switch Current Limit (A) Typical Performance Characteristics (Continued) 4.75 4.50 4.25 4.00 3.0 2.5 2.0 1.5 1.0 O 3.75 TJ=25 C VON/OFF=0, Switch Off 0.5 VIN=12V 3.50 -40 0.0 -20 0 20 40 60 80 100 0 120 5 10 O Junction Temperature ( C) Figure 12. Switch Current Limit vs. Junction Temperature 25 30 35 40 180 Shutdown Quiescent Current (µA) 5.25 5.
PAGE 11
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Typical Performance Characteristics (Continued) 8 1.5 7 ON/OFF Voltage (V) 1.4 ON/OFF Pin Current (µA) 1.6 OFF 1.3 1.2 1.1 ON 1.0 6 5 4 3 2 1 0.9 O VIN=12V 0.8 -40 -20 0 20 40 60 80 100 0 0.0 120 VIN=32V, TJ=25 C 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0 ON/OFF Pin Voltage (V) O Junction Temperature ( C) Figure 17. On/Off Pin Current vs. On/Off Pin Voltage Figure 16. On/Off Threshold Voltage vs.
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Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Typical Application Regulated DC Output 3A Load 4 FEEDBACK 1 CIN 470µF AP3003-3.3V VIN 2 OUTPUT GND 3 + L1 22µH D1 1N5822 ON/OFF 5 + COUT 220µF L1: Sumida CDRH127/LDNP-220MC or Equivalent Figure 19. Typical Application of AP3003-3.3V 12V Unregulated DC Input FEEDBACK 1 CIN 470µF Regulated DC Output 3A Load 4 + VIN AP3003-5.
PAGE 13
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Typical Application (Continued) 24V Unregulated DC Input Regulated DC Output 3A Load 4 FEEDBACK 1 CIN 470µF AP3003-12V VIN 2 OUTPUT GND 3 + L1 22µH + D1 1N5822 ON/OFF 5 COUT 220µF L1: Sumida CDRH127/LDNP-220MC or Equivalent Figure 19. Typical Application of AP3003-12V R2 3.69k R1 3.6k 12V Unregulated DC Input 1 CIN 470µF + VIN AP3003-ADJ 2 OUTPUT GND 3 2.
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Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Mechanical Dimensions Unit: mm(inch) TO-220-5 4.470(0.176) 4.670(0.184) 1.170(0.046) 1.370(0.054) 8.200(0.323) 8.600(0.339) 11.760(0.463) 12.160(0.479) 2.590(0.102) 2.890(0.114) 9.850(0.388) 10.150(0.400) φ3.790(0.149) 3.890(0.153) 13.500(0.531) 13.900(0.547) 0.710(0.028) 0.910(0.036) 2.520(0.099) 2.820(0.111) 1.700(0.067) TYP 6.700(0.264) 6.900(0.272) Aug. 2008 Rev. 1. 2 0.310(0.012) 0.530(0.
PAGE 15
Data Sheet 150kHz 3A BUCK DC-DC CONVERTER AP3003 Mechanical Dimensions (Continued) TO-263-5 4.470 (0.176) 4.670 (0.184) 9.880 (0.389) 10.180 (0.401) 1.170 (0.046) 1.370 (0.054) 5.600 (0.220) REF 15.140 (0.596) 15.540 (0.612) 1.560 (0.061) 1.760 (0.069) Unit: mm(inch) 8.200 (0.323) 8.600 (0.339) 0.000 (0.000) 0.150 (0.006) 5.080 (0.200) 5.480 (0.216) 1.700 (0.067) TYP 6.700 (0.264) 6.900 (0.272) 0.710 (0.028) 0.910 (0.036) Aug. 2008 Rev. 1. 2 0.310 (0.012) 0.530 (0.021) 2.340 (0.092) 2.
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BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein.