AP150933SG-13_技术文档

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Description

Pin Assignments

The AP1509 series are monolithic IC designed for a step-

down DC/DC converter, and own the ability of driving a

2A load without additional transistor. It saves board space.

The external shutdown function can be controlled by logic

level and then come into standby mode. The internal

compensation makes feedback control having good line and

load regulation without external design. Regarding protected

function, thermal shutdown is to prevent over temperature

operating from damage, and current limit is against over

current operating of the output switch. If current limit function

occurs and V_FBis down below 0.5V, the switching frequency

will be reduced. The AP1509 series operates at a switching

frequency of 150KHz thus allow smaller sized filter

components than what would be needed with lower frequency

switching regulators. Other features include a guaranteed

+4% tolerance on output voltage under specified input voltage

and output load conditions, and +15% on the oscillator

frequency. The output version included fixed 3.3V, 5V, 12V,

and an adjustable type. The chips are available in a standard

8-lead SOP-8 package.

(Top View)

V_IN

GND

8

7

6

5

1

2

3

4

Output

FB

AP1509

SOP-8L

SD

Features

Applications

•

Simple High-Efficiency Step-Down Regulator

On-Card Switching Regulators

•

Output Voltage: 3.3V, 5V, 12V and Adjustable Output

Version

Positive to Negative Converter

Adjustable Version Output Voltage Range, 1.23V to

18V+4%

•

150KHz +15% Fixed Switching Frequency

Voltage Mode Non-Synchronous PWM Control

Thermal-Shutdown and Current-Limit Protection

ON/OFF Shutdown Control Input

Operating Voltage can be up to 22V

Output Load Current: 2A

SOP-8L Packages

Low Power Standby Mode

Built-in Switching Transistor On Chip

SOP-8L: Available in “Green” Molding Compound

(No Br, Sb)

•

Lead Free Finish/ RoHS Compliant (Note 1)

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Typical Application Circuit

(1) Fixed Type Circuit

FB

12V

DC Input

3

3.3V/2A

L1

47uH

Output

Output Load

AP1509-

33

1

2

Inductor

V

IN

4

5

6

7

8

SD

GND GND GND GND

Co

Capacitor

C

D1

IN

Capacitor

Schottky Diode

(2) Adjustable Type Circuit

R2 1K

R1 1K

FB

3

12V

DC Input

L1

39uH

2.5V/2A

Output Load

Output

1

2

8

AP1509

V_IN

Inductor

4

5

6

7

D1

SD

GND GND GND GND

C_IN

Capacitor

Co

Capacitor

Schottky

Diode

R1

)

R2

V_OUT= V_FB×(1 +

V_FB= 1.23V

R2 = 1K ~ 3K

(3) Delay Start Circuit

R2 1K

R1 1K

FB

12V

DC Input

L1

3

2.5V/2A

39uH

Output

Output Load

V_IN

1

4

2

8

AP1509

Inductor

C_DELAY

0.1uF

5

6

7

D1

Schottky

Diode

Co

Capacitor

SD

GND GND GND GND

R_DELAY

10K

C_IN

Capacitor

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Pin Descriptions

Pin Name

Description

Operating voltage input

Switching output

V_IN

Output

GND

FB

Ground

Output voltage feedback control

ON/OFF Shutdown

SD

Functional Block Diagram

SD

V_IN

200mV

220mV

Current

1.235V

Source

Reference

bias

2.5V

Regulator

Start

up

+

Comp

_

Comp

+

Frequecy

compen-

sation

+

_

Amp

2A

Switch

Pre-

driver

_

Comp

+

FB

Output

GND

150kH

Thermal

Shutdown

z

OSC.

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

KV

V

ESD HBM

ESD MM

V_IN

Human Body Model ESD Protection

Machine Model ESD Protection

Supply Voltage

2

200

+24

-0.3 to +18

-1

V

V_SD

ON/OFF Pin Input Voltage

Feedback Pin Voltage

V

V_FB

V

V_OUT

P_D

Output Voltage to Ground

Power Dissipation

V

Internally Limited

-65 to +150

-40 to +125

W

^oC

T_ST

Storage Temperature

T_J

Operating Junction Temperature

Recommended Operating Conditions

Symbol

I_OUT

Parameter

Min

0

Max

Unit

A

Output Current

2

V_OP

Operating Voltage

4.5

-20

22

85

V

^oC

T_A

Operating Ambient Temperature

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Electrical Characteristics

Unless otherwise specified, V_IN= 12V for 3.3V, 5V, adjustable version and V_IN= 18V for the 12V version. I_LOAD= 0.5A

Specifications with boldface type are for full operating temperature range, the other type are for T_J= 25ºC.

Symbol

Parameter

Conditions

_FB= 1.3V

(Adjustable version only)

Min

Typ.

Max

-50

-100

173

Unit

V

I_FB

Feedback Bias Current

-10

nA

127

110

150

F_OSC

F_SCP

Oscillator Frequency

KHz

Oscillator Frequency of

Short Circuit Protect

When current limit occurred

and V_FB< 0.5V, T_a= 25 ^oC

_OUT= 2A

No outside circuit

V_FB= 0V force driver on

10

30

50

1.4

1.5

I

V_SAT

DC

I_CL

Saturation Voltage

1.25

V

%

A

Max. Duty Cycle (ON)

Min. Duty Cycle (OFF)

V_FB= 0V force driver on

100

0

V_FB= 12V force driver off

Peak current

Current Limit

No outside circuit

V_FB= 0V force driver on

No outside circuit

V_FB= 12V force driver off

V_IN= 22V

V_FB= 12V force driver off

ON/OFF pin = 5V

V_IN= 22V

3

Output

Output = 0

-200

uA

I_L

Leakage

Current

Output = -1

-5

5

mA

I_Q

Quiescent Current

Standby Quiescent

Current

10

150

200

0.6

I_STBY

V_IL

70

uA

Low (regulator ON)

-

ON/OFF Pin Logic Input

Threshold Voltage

1.3

V

V_IH

High (regulator OFF)

2.0

-

ON/OFF Pin Logic Input

Current

ON/OFF Pin Input Current V_LOGIC= 0.5V (ON)

I_H

I_L

V_LOGIC= 2.5V (OFF)

-0.01

-1

uA

-0.1

15

Junction to

case

θ_JA

Thermal Resistance

SOP-8L

^oC/W

Thermal Resistance

with a copper area of

approximately 3 in²

Junction to

ambient

θ_JC

SOP-8L

70

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Electrical Characteristics (Continued)

Specifications with boldface type are for full operating temperature range, the other type are for T_J= 25ºC.

Symbol

Parameter

Conditions

V_Min

Typ.

V_Max

Unit

4.5V < V_IN< 22V

0.2A < I_LOAD< 2A

V_OUTprogrammed for 3V

Output

Feedback

1.193

1.18

1.267

1.28

V_FB

1.23

V

AP1509-ADJ

η

Efficiency

V_IN= 12V, I_LOAD=2A

76

3.3

78

5

%

V

4.75V < V_IN< 22V

0.2A < I_LOAD< 2A

3.168

3.135

3.432

3.465

V_OUT

Output Voltage

Efficiency

AP1509-3.3V

AP1509-5V

AP1509-12V

η

V_IN= 12V, I_LOAD= 2A

78

%

V

7V < V_IN< 22V

0.2A < I_LOAD< 2A

4.8

4.75

5.2

5.25

V_OUT

Output Voltage

Efficiency

η

V_IN= 12V, I_LOAD= 2A

83

12

90

%

V

15V < V_IN< 22V

0.2A < I_LOAD< 2A

11.52

11.4

12.48

12.6

V_OUT

Output Voltage

Efficiency

η

V_IN= 15V, I_LOAD= 2A

90

%

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www.diodes.com

June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Typical Performance Characteristics

AP1509 Efficiency vs. Temperature

(V_IN=12V, V_OUT=5V, Io=2A)

AP1509 Efficiency vs. Temperature

(V_IN=12V, V_OUT=3.3V, Io=2A)

86

81

80

79

78

77

76

75

74

85

84

83

82

81

80

79

78

77

76

73

75

-50 -30 -10 10 30 50 70 90 110 130 150

Temperature (T ) (°C)

A

Temperature (T_A) (°C)

AP1509 Saturation Voltage vs. Temperature

(V_IN=12V, V_FB=0V, VSD=0)

AP1509 Switch Current Limit vs. Temperature

(V_IN=12V, V_FB=0V)

1.4

1.3

5.5

5

1.2

2A

1.1

4.5

4

1A

1

0.9

0.5A

3.5

3

0.8

0.7

-50

-30

-10

10

30

50

70

90

-50

-25

0

25

50

75

100

125

Temperature (TA)ꢀ(°C)

Temperature (TA) (°C)

AP1509 Supply Current vs. Temperature

(V_IN=12V, No Load, Von/off =0V(Switch ON) ,Von/off =5V(Switch OFF))

15

14

13

12

11

10

9

8

7

6

5

60

55

50

45

40

35

30

Switch OFF

Switch ON

-50 -30 -10 10 30 50 70 90 110 130 150

Temperature (TA) (°C)

-50 -30 -10 10 30 50 70 90 110 130 150

Temperature (TA) (°C)

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Typical Performance Characteristics (Continued)

AP1509 Threshold Voltage vs. Temperature

(V_IN=12V, Io=100mA)

AP1509 ON/OFF Current vs. ON/OFF Voltage

(V_IN=12V)

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1

10

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

0.9

0.8

0

3

6

9

12

15

18

21

-50 -30 -10 10 30 50 70 90 110 130 150

Temperature (TA) (°C)

ON/OFF Voltage (V)

AP1509 Frequency vs. Temperature

(V_IN=12V, Io=500mA, V_OUT=5V)

AP1509 Feedback Current vs. Temperature

(V_IN=12V, V_OUT=5V, Vfb=1.3V)

170

165

160

155

150

145

10

0

-10

-20

-30

-40

140

-50

-50 -30 -10 10 30 50 70 90 110 130 150

Temperature (TA) (°C)

AP1509 Output Voltage vs. Temperature

(V_IN=12V, Io=2A)

3.5

3.45

3.4

3.35

3.3

3.25

3.2

3.15

3.1

3.05

3

2.95

2.9

-40 -20

0

20 40 60 80 100 120 140 160

Temperature (TA) (°C)

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Typical Performance Characteristics (Continued)

Feedback Voltage vs. Temperature

(V_IN=15V, V_OUT=5V)

Header Frequency vs. Temperature

1.26

1000

900

800

700

600

500

400

300

200

100

0

1.25

1.24

1.23

1.22

-40

10

60

110

-40

10

60

110

Temperature (^oC)

Supply Current vs. Temperature

(V_IN=15V, V_OUT=5V, l_OUT=0A)

Supply Current vs. Supply Voltage

(V_IN=15V, V_OUT=5V, l_OUT=0A)

3

2.5

2

3

2.5

2

1.5

1

1.5

1

0.5

0

0.5

0

-40

10

60

110

0

5

10

15

Temperature (^oC)

Supply Voltage (V)

Efficiency vs. Output Current

(V_IN=15V, V_OUT=5V)

Efficiency vs. Output Current

(V_IN=15V, V_OUT=3.3V)

90

85

80

75

70

85

75

65

55

0

20

40

60

0

20

40

60

Output Current (mA)

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www.diodes.com

June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Functions Description

Pin Functions

+V_IN

This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be

presented at this pin to minimize voltage transients and to supply the switching currents needed by the

regulator.

Ground

Circuit ground.

Output

Internal switch. The voltage at this pin switches between (+V_IN– V_SAT) and approximately – 0.5V, with a duty

cycle of approximately V_OUT/ V_IN. To minimize coupling to sensitive circuitry, the PC board copper area

connected to this pin should be minimized.

Feedback

Senses the regulated output voltage to complete the feedback loop.

SD

Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input

supply current to approximately 150uA. Pulling this pin below a threshold voltage of approximately 1.3V turns

the regulator on, and pulling this pin above 1.3V (up to a maximum of 18V) shuts the regulator down. If this

shutdown feature is not needed, the SD pin can be wired to the ground pin.

Thermal Considerations

The SOP-8L package needs a heat sink under most conditions. The size of the heat sink depends on the input

voltage, the output voltage, the load current and the ambient temperature. The AP1509 junction temperature

rises above ambient temperature for a 2A load and different input and output voltages. The data for these

curves was taken with the AP1509 (SOP-8L package) operating as a buck-switching regulator in an ambient

temperature of 25^oC (still air). These temperature increments are all approximate and are affected by many

factors. Higher ambient temperatures require more heat sinker.

For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper

should be used in the board layout (One exception is the output (switch) pin, which should not have large areas

of copper). Large areas of copper provide the best transfer of heat (lower thermal resistance) to the surrounding

air, and moving air lowers the thermal resistance even further.

Package thermal resistance and junction temperature increments are all approximate. The increments are

affected by a lot of factors. Some of these factors include board size, shape, thickness, position, location, and

even board temperature. Other factors are, trace width, total printed circuit copper area, copper thickness,

single or double-sided, multi-layer board and the amount of solder on the board.

The effectiveness of the PC board to dissipate heat also depends on the size, quantity and spacing of other

components on the board, as well as whether the surrounding air is still or moving. Furthermore, some of these

components such as the catch diode will add heat to the PC board and the heat can vary as the input voltage

changes. For the inductor, depending on the physical size, type of core material and the DC resistance, it could

either act as a heat sink taking heat away from the board, or it could add heat to the board.

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Ordering Information

AP1509 - XX S X - 13

Package

Lead Free

Packing

Output Version

L : Lead Free

G : Green

13 : Tape & Reel

Blank : Adjustable

33 : 3.3V

S : SOP-8L

50 : 5.0V

12 : 12V

13” Tape and Reel

Part Number Suffix

Package

Code

Packaging

(Note 2)

SOP-8L

Device

Quantity

AP1509-XXSL-13

AP1509-XXSG-13

S

2500/Tape & Reel

-13

SOP-8L

Notes: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Marking Information

(1) SOP-8L

( Top View )

5

8

Logo

Part No.

Output Type :

Blank : Adjustable

1509-33 : 3.3V

1509-50 : 5.0V

1509-12 : 12V

L : Lead Free

G : Green

1509-XX

YY : Year : 08, 09,10~

WW : Week : 01~52; 52

represents 52 and 53 week

X : Internal Code

YYWWX X

1

4

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

Package Outline Dimensions (All Dimensions in mm)

(1) Package Type: SOP-8L

Gauge Plane

Seating Plane

0.62/0.82

Detail "A"

7°~9°

0.35max.

45°

Detail "A"

0°/8°

0.3/0.5

1.27typ

4.85/4.95

8x-0.60

6x-1.27

Land Pattern Recommendation

(Unit: mm)

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2

AP1509

150KHz, 2A PWM BUCK DC/DC CONVERTER

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS

DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other

changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability

arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any

license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described

herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies

whose products are represented on Diodes Incorporated website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized

sales channel.

Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall

indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees

arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names

and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without

the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided

in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected

to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or

systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements

concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,

notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,

Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes

Incorporated products in such safety-critical, life support devices or systems.

www.diodes.com

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June 2010

AP1509

Document number: DS31016 Rev. 4 - 2


型号：	AP150933SG-13
厂家：	DIODES INCORPORATED
描述：	2A SWITCHING REGULATOR, 173kHz SWITCHING FREQ-MAX, PDSO8, GREEN, SOP-8 开关控制器开关式稳压器开关式控制器光电二极管电源电路开关式稳压器或控制器
文件：	总13页 (文件大小：208K)
中文：	中文翻译
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AP150933SG-13 [DIODES]

相关型号：

AP150933SG-U

AP150933SL-13

AP150933SL-U

AP150950SG-13

AP150950SG-U

AP150950SL-13

AP150950SL-U

AP1509S

AP1509S

AP1509SA

AP1509SA

AP1509SG-13