AP1509-SGL-13_技术文档

AP1509

150kHz, 2A PWM BUCK DC-DC CONVERTER

Description

Pin Assignments

The AP1509 series are monolithic ICs designed for a step-down

DC-DC converter and have the ability of driving a 2A load without an

additional transistor, which saves board space.

(Top View)

The external shutdown function can be controlled by logic level and

then go into standby mode. The internal compensation makes

feedback control have good line and load regulation without external

design. Regarding protected function, thermal shutdown prevents

overtemperature operating from damage, and current limit works

against overcurrent operating of the output switch. If current limit

function occurs, and V_FBis below 0.5V, the switching frequency is

reduced. The AP1509 series operates at a switching frequency of

150kHz thus allowing smaller-sized filter components than what is

required with lower frequency switching regulators.

V_IN

GND

8

7

6

5

1

2

3

4

Output

FB

AP1509

SOP-8L

SD

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 SO-8 package.

Features

Applications

•

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

Adjustable Version Output Voltage Range of 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

•

Simple High-Efficiency Step-Down Regulator

On-Card Switching Regulators

Positive to Negative Converter

Operating Voltage up to 22V

Output Load Current: 2A

Low Power Standby Mode

Built-in Switching Transistor On Chip

Totally Lead-Free & Fully RoHS Compliant (Note 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free,

"Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)

and <1000ppm antimony compounds.

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

Typical Application Circuit

(1) Fixed Type Circuit

FB

12V

DC Input

3

3.3V/2A

Output Load

L1

47uH

Output

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

V_OUT= V_FB× (1 +

)

R2

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

2

Output Load

V_IN

1

4

AP1509

Inductor

C_DELAY

0.1uF

5

6

7

8

D1

Schottky

Diode

Co

Capacitor

SD

GND GND GND GND

R_DELAY

10K

C_IN

Capacitor

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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

°C

T_ST

Storage Temperature

T_J

Operating Junction Temperature

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

I_OUT

V_OP

T_A

Output Current

0

2

A

V

Operating Voltage

4.5

-20

22

85

Operating Ambient Temperature

°C

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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= 25°C.

Symbol

Parameter

Conditions

Min

Typ.

-10

Max

-50

-100

173

Unit

V_FB= 1.3V

Feedback Bias Current

—

nA

I_FB

(Adjustable Version Only)

127

110

150

Oscillator Frequency

—

kHz

F_OSC

F_SCP

When Current Limit Occurred and

V_FB< 0.5V, T_a= 25°C

Oscillator Frequency of Short Circuit

Protect

10

—

30

50

1.4

1.5

I

_OUT= 2A

Saturation Voltage

No Outside Circuit

V_FB= 0V Force Driver On

V_FB= 12V Force Driver Off

Peak Current

No Outside Circuit

1.25

V

V_SAT

DC

Max. Duty Cycle (ON)

Min. Duty Cycle (OFF)

—

100

0

—

%

A

Current Limit

3

—

I_CL

V_FB= 0V Force Driver On

No Outside Circuit

V_FB= 12V Force Driver Off

Output = 0

—

-200

µA

Output Leakage Current

I_L

Output = -1

Quiescent Current

—

-5

5

mA

V_IN= 22V

10

150

200

0.6

I_Q

I_STBY

V_IL

V_FB= 12V Force Driver Off

ON/OFF pin = 5V

V_IN= 22V

Standby Quiescent Current

—

70

µA

Low (Regulator ON)

ON/OFF Pin Logic Input Threshold

Voltage

1.3

V

High (Regulator OFF)

2.0

—

V_IH

ON/OFF Pin Logic Input Current

ON/OFF Pin Input Current

Thermal Resistance

with a Copper Area of Approximately

3in²

—

-0.1

15

-0.01

-1

—

I_H

I_L

ϴ_JA

V_LOGIC= 2.5V (OFF)

V_LOGIC= 0.5V (ON)

µA

SO-8

Junction to Case

°C/W

SO-8

Junction to Ambient

—

70

—

°C/W

V

ϴ_JC

4.5V < V_IN< 22V

Output

Feedback

1.193

1.18

1.267

1.28

0.2A < I^LOAD< 2A

V_FB

1.23

AP1509 - ADJ

V_OUTProgrammed for 3V

Ƞ

Efficiency

76

—

%

V

V_IN= 12V, I_LOAD=2A

4.75V < V_IN< 22V

0.2A < I_LOAD< 2A

3.168

3.135

3.432

3.465

V_OUT

Output Voltage

3.3

AP1509 - 3.3V

AP1509 - 5V

AP1509 - 12V

V

_IN= 12V,

Ƞ

Efficiency

78

5

—

%

V

I_LOAD= 2A

7V < V_IN< 22V

0.2A < I_LOAD< 2A

V_IN= 12V,

4.8

4.75

5.2

5.25

V_OUT

Ƞ

V_OUT

Ƞ

Output Voltage

Efficiency

83

12

90

—

%

V

I_LOAD= 2A

15V < V_IN< 22V

0.2A < I_LOAD< 2A

V_IN= 15V,

11.52

11.4

12.48

12.6

Output Voltage

Efficiency

90

—

%

I_LOAD= 2A

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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

73

85

84

83

82

81

80

79

78

77

76

75

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

Temperature (T_A) (°C)

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

Temperature (T ) (°C)

A

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

5.5

1.3

1.2

1.1

1

5

4.5

4

2A

1A

0.5A

0.9

0.8

0.7

3.5

3

-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

60

55

50

14

13

12

11

10

9

8

7

6

5

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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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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

-50

140

-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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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

Typical Performance Characteristics (continued)

Feedback Voltage vs. Temperature

(V_IN= 15V, V_OUT= 5V)

Header Frequency vs. Temperature

1.26

1.25

1.24

1.23

1.22

1000

900

800

700

600

500

400

300

200

100

0

-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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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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 required 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 PCB copper area connected to this pin should be minimized.

Feedback

This pin 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

150µA. 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 required, the SD pin can be wired to the ground pin.

Thermal Considerations

The SO-8 package requires 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 (SO-8 package) operating as a buck-switching

regulator in an ambient temperature of 25°C (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 PCB 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 PCB 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, add heat to the PCB,

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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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

Ordering Information

Part Number Suffix

Lead

Free/Green

Quantity

Voltage

(V)

Package Package

Status

(Note 4)

Alternative

Tube

13” Tape

and Reel

Device

Code

(Note 5)

AP1509-12SG-13

AP1509-33SG-13

AP1509-50SG-13

AP1509-SG-13

12

3.3

5.0

ADJ

12

S

SO-8

Green

2500

NA

-13

In production

End of life

AP1509-12SGL-13

AP1509-33SGL-13

AP1509-50SGL-13

AP1509-SGL-13

None

3.3

5.0

ADJ

End of life

Notes: 4. All Lead-free versions are End of Life (EOL) with no replacement.

5. For packaging details, go to our website at:

https://www.diodes.com/design/support/packaging/diodes-packaging/diodes-package-outlines-and-pad-layouts/

Marking Information

(1) SO-8

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

Package Outline Dimensions (All Dimensions in mm)

Please see http://www.diodes.com/package-outlines.html for the latest version.

SO-8

Dim Min

Max

1.50

0.20

0.50

0.25

4.95

6.10

3.90

3.95

--

Typ

1.45

0.15

0.40

0.20

4.90

6.00

3.85

3.90

1.27

0.35

0.72

0.65

E

A

A1

b

c

D

1.40

0.10

0.30

0.15

4.85

5.90

3.80

3.85

--

1

E

b

E1

E0

e

E1

h

)

s

de

i

Q

s

l

A

(

h

-

--

0.82

0.70

7°

9°

c

L

Q

0.62

0.60

4°±3°

A

All Dimensions in mm

Gauge Plane

Seating Plane

L

A1

e

E0

D

Suggested Pad Layout

Please see http://www.diodes.com/package-outlines.html for the latest version.

SO-8

X1

Dimensions Value (in mm)

C

X

X1

Y

1.27

0.802

4.612

1.505

6.50

Y1

Y

C

X

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2

AP1509

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.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is

the final and determinative format released by Diodes Incorporated.

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.

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October 2018

AP1509

Document number: DS31016 Rev. 5 - 2


型号：	AP1509-SGL-13
厂家：	DIODES INCORPORATED
描述：	2A PWM BUCK DC-DC CONVERTER DC-DC转换器开关
文件：	总12页 (文件大小：317K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AP1509-SGL-13 [DIODES]

相关型号：

AP1509-SL

AP1509-SL

AP1509-SL-13

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AP1509-SLA

AP1509-XXS

AP150912SG-13

AP150912SG-U

AP150912SL-13

AP150912SL-U

AP150933SG-13

AP150933SG-U