Diodes AP3003 User Manual

Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

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 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.

A standard series of inductors, optimized for use with the AP3003 series, are available from several manufacturers. This feature greatly simplifies the design of switch-mode power supplies.

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 Oscillator

· Input Voltage Range up to 32V

· Requires only 4 external components

· High Efficiency up to 90%

· Excellent Line and Load Regulation

· TTL Shutdown Capability

· Low Power Standby Mode, I

· Built-in Current Limit Protection and Thermal

Shutdown Circuit

Typically 80µA

Q

Applications

· LCD Monitor and LCD TV

· On-Card DC-DC Converter

· DVD Recorder

· PDP

TO-220-5

Figure 1. Package Types of AP3003

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

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TO-263-5

Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Pin Configuration

T Package

(TO-220-5)

5 4 3 2 1

Metal Tab GND

Figure 2. Pin Configuration of AP3003 (T op View)

ON/OFF FEEDBACK GND OUTPUT V

IN

Metal Tab GND

Pin Description

Pin Number Pin Name Function

1V

IN

Unregulated input voltage

S Package

(TO-263-5)

5 4 3 2

1

ON/OFF FEEDBACK GND

OUTPUT

V

IN

2 OUTPUT Switch driver output

3 GND Ground

4 FEEDBACK Feedback Pin. For fixed version, connect it to system output. For adjustable version,

connect it with an external resistor and capacitor feedback network to program the system output voltage

5ON

/OFF The TTL logic compatible input to control the regulator on or off

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Functional Block Diagram

ON

/OFF

5

1

V

2

OUTPUT

3

GND

FEEDBACK

1.23V

REFERENCE

Bias

Current

4

R2

R1

REGULATOR

+

EA

_

For 3.3V

R1=2.49kΩ R2=4.18kΩ

5V

R1=2.49kΩ R2=7.57kΩ

12V

R1=2.49kΩ R2=21.8kΩ

ADJ

R1=Open R2=0Ω

2.5V

2.5V Frequency Shift

150KHz

OSC

+

_

COMP

START UP

LATCH

220mV200

+

COMP

_

COMP

+

DRIVER

&

INV

THERMAL

SHUTDOWN

mV

4.4Ω

1:100

IN

Figure 3. Functional Block Diagram of AP3003

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Ordering Information

AP3003 -

E1: Lead Free

Circuit Type

G1: Green TR: Tape and Reel

Blank: Tube

Package

TO-220-5

TO-263-5

Package T: TO-220-5

S: TO-263-5

Temperature

Range

o

-40 to 85

C

o

C

ADJ: Adjustable Output

3.3: Fixed Output 3.3V

5.0: Fixed Output 5.0V 12: Fixed Output 12V

Part Number Marking ID

Lead Free Green Lead Free Green

AP3003T-ADJE1 AP3003T-ADJG1 AP3003T-ADJE1 AP3003T-ADJG1 Tube AP3003T-3.3E1 AP3003T-3.3G1 AP3003T-3.3E1 AP3003T-3.3G1 Tube AP3003T-5.0E1 AP3003T-5.0G1 AP3003T-5.0E1 AP3003T-5.0G1 Tube AP3003T-12E1 AP3003T-12G1 AP3003T-12E1 AP3003T-12G1 Tube AP3003S-ADJE1 AP3003S-ADJG1 AP3003S-ADJE1 AP3003S-ADJG1 T ube AP3003S-ADJTRE1 AP3003S-ADJTRG1 AP3003S-ADJE1 AP3003S-ADJG1 Tape & Reel AP3003S-3.3E1 AP3003S-3.3G1 AP3003S-3.3E1 AP3003S-3.3G1 Tube AP3003S-3.3TRE1 AP3003S-3.3TRG1 AP3003S-3.3E1 AP3003S-3.3G1 Tape & Reel AP3003S-5.0E1 AP3003S-5.0G1 AP3003S-5.0E1 AP3003S-5.0G1 Tube AP3003S-5.0TRE1 AP3003S-5.0TRG1 AP3003S-5.0E1 AP3003S-5.0G1 Tape & Reel AP3003S-12E1 AP3003S-12G1 AP3003S-12E1 AP3003S-12G1 Tube AP3003S-12TRE1 AP3003S-12TRG1 AP3003S-12E1 A P3003S-12G1 Tape & Reel

Packing

Type

BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green packages.

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Input Voltage V

ON

/OFF Pin Voltage V

ON/OFF

Feedback Pin Voltage V

Operating Junction Temperature T

Thermal Resistance (Junction to Ambient, No Heatsink)

Lead Temperatur e (Soldering, 10sec) T

TO-220-5

R

TO-263-5

LEAD

Storage Temperature Range T

IN

FB

J

θJA

STG

40 V

150

60

260

-65 to 150

o

C/W

o

C

o

C

o

C

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.

Recommended Operating Conditions

Parameter Symbol Value Unit

3.3V

5.0V 32

Maximum Input Voltage (Note 2)

12V 32 ADJ (V

ADJ (V

=3.2V) 32

OUT

=2.5V) 25

OUT

Operating Junction Temperature T

V

IN

J

Note 2: For ADJ version, the recommended supply voltage depends on the needed output voltage.

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

5

32

-40 to 125

V

o

C

Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Electrical Characteristics

For 3.3V Output Voltage Version

Unless otherwise specified, TJ=25 Temperature Range.

Parameter Symbol Conditions Min Typ Max Unit

o

C. The specifications with boldface type apply over Full Operating Junction

Output Voltage

Efficiency η V

V

OUT

5.5V≤VIN≤32V,

LOAD

≤3A

LOAD

0.2A≤I

=12V, I

IN

=3A 75 %

3.168

3.135

3.3

3.432

3.465

For 5V Output Voltage Version

Unless otherwise specified, TJ=25 Temperature Range.

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage

Efficiency η V

o

C. The specifications with boldface type apply over Full Operating Junction

V

OUT

7V≤VIN≤32V,

0.2A≤I

LOAD

=12V, I

IN

LOAD

≤3A

=3A 80 %

4.800

4.750

5

5.200

5.250

For 12V Output Voltage Version

Unless otherwise specified, TJ=25 Temperature Range.

Parameter Symbol Conditions Min Typ Max Unit

Output Voltage

o

C. The specifications with boldface type apply over Full Operating Junction

V

OUT

15V≤VIN≤32V,

LOAD

≤3A

0.2A≤I

11.52

11.40

12.0

12.48

12.60

V

Efficiency η V

=24V, I

IN

=3A 88 %

LOAD

For ADJ Output Voltage Version

Unless otherwise specified, TJ=25 Temperature Range.

Parameter Symbol Conditions Min Typ Max Unit

Feedback Voltage

Efficiency

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

o

C. The specifications with boldface type apply over Full Operating Junction

V

FB

η V

4.5V≤VIN≤25V,

0.2A≤I V

OUT

=12V, I

IN

≤3A,

LOAD

programmed for 2.5V

LOAD

=3A, V

OUT

=2.5V

1.193

1.18

1.23

73 %

1.267

1.28

6

V

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, VIN=24V for 12V version, I

=500mA, TJ=25

LOAD

Range.

Parameter Symbol Conditions Min Typ Max Unit

Feedback Bias Current

o

C. Specifications with boldface type apply over Full Operating Junction Temperature

I

FB

Adjustable Version Only,

=1.3V

V

FB

10 50

100

nA

Oscillator Frequency f

Saturation Voltage

V

Maximum Duty Cycle D Minimum Duty Cycle

D

Current Limit

Output Leakage Current

I

Quiescent Current I

Standby Quiescent Current

/OFF Pin Logic Input

ON Threshold Voltage

/OFF Pin Input Current

ON

I

STBY

V

SAT

MAX

MIN

I

CL

SWL

Q

IL

IH

I

H

I

L

(Note 3) 127

110

I

=3A ( No output devices,

LOAD

=0V)

V

FB

150 173

173

1.2 1.5

1.6

kHz

V

VFB=0V 100 % VFB=1.3V 0

Peak Current , No output devices, V

FB

=0V

3.6

3.4

Output=0V, No output devices, V

=1.3V, VIN=32V

FB

Output=-1V, No output devices,

=1.3V, VIN=32V

V

FB

4.5 6.9

7.5

50 µA

2 30 mA

%

A

VFB=1.3V 5 10 mA

ON/OFF Pin=5V, VIN=18V

80

200

250

µA

Regulator ON 0.6

V

Regulator OFF 2.0

V

=2.5V (Regulator OFF) 5 15

PIN5

V

=0.5V (Regulator ON) 0.02 5

PIN5

µA

Note 3: The switching frequency is reduced when the second stage current limit is activated. Note 4: The specifications with boldface are GBD (Guaranteed By Design ).

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Performance Characteristics

90.0

87.5

85.0

82.5

80.0

77.5

75.0

72.5

Efficiency (%)

70.0

67.5

65.0

62.5

60.0

0.00.51.01.52.02.53.03.5

3.3V Version =12V, TJ=25OC

V

IN

Output Current (A)

Figure 4.

Efficiency vs. Output Current

90.0

87.5

85.0

82.5

80.0

77.5

75.0

72.5

Efficiency (%)

70.0

67.5

65.0

62.5

60.0

0.00.51.01.52.02.53.03.5

Output Current (A)

12V Version

=24V,TJ=25oC

V

IN

90.0

87.5

85.0

82.5

80.0

77.5

75.0

72.5

Efficiency (%)

70.0

67.5

65.0

62.5

60.0

0.00.51.01.52.02.53.03.5

5.0V Version =12V, TJ=25OC

V

IN

Output Current (A)

Figure 5. Efficiency vs. Output Current

90.0

87.5

85.0

82.5

80.0

77.5

75.0

72.5

efficiency (%)

70.0

67.5

65.0

62.5

60.0

0.00.51.01.52.02.53.03.5

ADJ Version (V V

=10V, TJ=25OC

IN

Output Current (A)

Regulated to 2.5V)

OUT

Figure 6. Efficiency vs. Output Current

Figure 7. Efficiency vs. Output Current

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Performance Characteristics (Continued)

92.5

90.0

87.5

85.0

82.5

80.0

77.5

75.0

72.5

Efficiency (%)

70.0

67.5

65.0

62.5

60.0 0 4 8 12162024283236

I

=3A, TJ=25OC

OUT

3.3V Version

5.0V Version 12V Version ADJ Version (V

OUT

=2.5V)

Input Voltage (V)

Figure 8.

Efficiency vs. Input Voltage

0.20

0.16

0.12

0.08

0.04

0.00

-0.04

-0.08

Output Voltage Change (%)

-0.12

-0.16

-0.20 0 4 8 12 16 20 24 28 32 36

Input Voltage (V)

Figure 9. Line Regulation

V I

T

OUT

LOAD

J

=5.0V =0.1A

=25OC

5.05

5.04

5.03

5.02

5.01

5.00

4.99

Output Voltage (V)

4.98

4.97

4.96

4.95

0.00.51.01.52.02.53.03.5

VIN=12V, V T

=25OC

J

OUT

=5.0V

Output Current (A)

1.6

1.5

1.4

1.3

1.2

1.1

1.0

0.9

0.8

Switch Saturation Voltage (V)

0.7

0.6

0.00.51.01.52.02.53.03.5

VIN=12V, TJ=25OC

Switch Current (A)

Figure 10. Load Regulation

Figure 11. Switch Saturation Voltage vs. Switch Current

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Performance Characteristics (Continued)

5.50

5.25

5.00

4.75

4.50

4.25

4.00

Switch Current Limit (A)

3.75

3.50

-40-200 20406080100120

Figure 12.

5.50

5.25

5.00

4.75

4.50

4.25

4.00

3.75

3.50

3.25

Quiescent Current (mA)

3.00

2.75

2.50

-40-200 20406080100120

Junction Temperature (OC)

VIN=12V

4.5

4.0

3.5

3.0

2.5

2.0

1.5

Quiescent Current (mA)

1.0

0.5

0.0

0 5 10 15 20 25 30 35 40

Supply Voltage (V)

TJ=25OC V

ON/OFF

=0, Switch Off

Switch Current Limit vs. Junction Temperature Figure 13. Quiescent Current vs. Supply Voltage

VIN=12V V

ON/OFF

Junction Temperature (oC)

=0V, Switch OFF

180

160

140

120

100

80

60

40

Shutdown Quiescent Current (µA)

20

0

0 4 8 12 16 20 24 28 32 36

Supply Voltage (V)

TJ=25OC V

ON/OFF

=5V

Figure 14. Quiescent Current vs. Junction Temperature

Figure 15. Shutdown Quiescent Current vs. Input Voltage

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Performance Characteristics (Continued)

1.6

1.5

1.4

1.3

1.2

1.1

ON/OFF Voltage (V)

1.0

0.9

0.8

-40-200 20406080100120

Junction Temperature (OC)

Figure 16.

On/Off Threshold Voltage

OFF

ON

VIN=12V

8

7

6

5

4

3

2

ON/OFF Pin Current (µA)

1

0

0.0 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)

Figure 17. On

/Off Pin Current vs. On/Off Pin Voltage

VIN=32V, TJ=25OC

vs. Junction Temperature

160

156

152

148

144

140

136

Frequency (kHz)

132

128

124

120

-40-200 20406080100120

Junction Temperature (OC)

Figure 18. Switching Frequency vs. Junction Temperature

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Application

4

FEEDBACK

C

IN

470µF

1

+

V

IN

AP3003-3.3V

ON/OFFGND

3

OUTPUT

5

L1: Sumida CDRH127/LDNP-220MC or Equivalent

Figure 19. Typical Application of AP3003-3.3V

12V

Unregulated

DC Input

C

IN

470µF

1

V

IN

+

4

FEEDBACK

AP3003-5.0V

ON/OFFGND

53

2

OUTPUT

2

L1

22µH

D1

1N5822

22µH

1N5822

D1

L1

+

C

OUT

220µF

+

C

220µF

Regulated

DC Output

3A Load

Regulated

DC Output

3A Load

OUT

L1: Sumida CDRH127/LDNP-220MC or Equivalent

Figure 20. Typical Application of AP3003-5.0V

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Typical Application (Continued)

24V

Unregulated

DC Input

1

V

IN

+

C

IN

4

FEEDBACK

AP3003-12V

ON/OFFGND

470µF

L1: Sumida CDRH127/LDNP-220MC or Equivalent

Figure 19. Typical Application of AP3003-12V

R1

3.6k

12V

Unregulated

DC Input

C

IN

470µF

1

V

IN

+

4

FEEDBACK

AP3003-ADJ

ON/OFFGND

53

OUTPUT

53

OUTPUT

R2 3.69k

2

D1

1N5822

2

C

FF

33nF

22µH

D1

1N5822

L1

22µH

C

220µF

L1

OUT

Regulated

DC Output

3A Load

+

C

OUT

220µF

2.5V Regulated DC Output

3A Load

+

V

=1.23 *

OUT

(R2+R1)

R1

L1: Sumida CDRH127/LDNP-220MC or Equivalent

Figure 20. Typical Application of AP3003-ADJ

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Mechanical Dimensions

2.590(0.102)

2.890(0.114)

11.760(0.463)

TO-220-5

9.850(0.388)

10.150(0.400)

φ3.790(0.149)

3.890(0.153)

12.160(0.479)

0.710(0.028)

0.910(0.036)

1.170(0.046)

1.370(0.054)

8.200(0.323)

4.470(0.176)

4.670(0.184)

8.600(0.339)

Unit: mm(inch)

2.520(0.099)

2.820(0.111)

13.500(0.531)

13.900(0.547)

1.700(0.067) TYP

6.700(0.264)

6.900(0.272)

0.310(0.012)

0.530(0.021)

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

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Data Sheet

150kHz 3A BUCK DC-DC CONVERTER AP3003

Mechanical Dimensions (Continued)

TO-263-5 Unit: mm(inch)

1.560 (0.061)

1.760 (0.069)

8.200 (0.323)

8.600 (0.339)

5.080 (0.200)

5.480 (0.216)

9.880 (0.389)

10.180 (0.401)

1.700 (0.067) TYP

6.700 (0.264)

6.900 (0.272)

15.140 (0.596)

15.540 (0.612)

0.710 (0.028)

0.910 (0.036)

0.000 (0.000)

0.150 (0.006)

0.310 (0.012)

0.530 (0.021)

2.340 (0.092)

2.740 (0.108)

4.470 (0.176)

4.670 (0.184)

1.170 (0.046)

1.370 (0.054)

5.600 (0.220) REF

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

15

BCD Semiconductor Manufacturing Limited

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Diodes AP3003 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual