AP3409_技术文档

A Product Line of

Diodes Incorporated

AP3409/A

3A, 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER

Description

Pin Assignments

(Top View)

The AP3409/A is a current mode, PWM synchronous buck DC/DC

converter, capable of driving a 3A load with high efficiency, excellent

line and load regulation. It operates in continuous PWM mode.

Pin 1 Mark

1

2

3

10

COMP

FB

SHDN/RT

The AP3409/A integrates synchronous P-channel and N-channel

power MOSFET switches with low on-resistance. It is ideal for

portable applications powered from a single Li-ion battery. 100% duty

cycle and low on-resistance P-channel internal power MOSFET can

maximize the battery life.

9

8

GND

SW

Exposed Pad

Connected to

PGND

VDD

7

6

4

5

SW

PVDD

PGND

The switching frequency of AP3409/A can be programmable from

300kHz to 4MHz, which allows small-sized components, such as

capacitors and inductors. A standard series of inductors from several

different manufacturers are available. This feature greatly simplifies

the design of switch-mode power supplies.

U-DFN3030-10 (DN Package)

For AP3409

The AP3409/A is available in U-DFN3030-10 package.

(Top View)

Pin 1 Mark

Features

SHDN/RT

1

2

3

10

COMP

FB



Input Voltage Range: 2.6V to 5.5V

Adjustable Output from 0.8V to 5V

0.8V Reference Voltage with ± 2% Precision

Output Current: 3A

GND

SW

9

8

Exposed Pad

Connected to

PGND

PGOOD

VDD

SW

7

6

4

5

High Efficiency up to 95%

Low R_DSONInternal Switches

Programmable Frequency: 300kHz to 4MHz

Current Mode Control

Forced Continuous-mode Operation

100% Duty Cycle

Built-in Soft-start

Built-in Short Circuit Protection

Built-in Thermal Shutdown Protection

Built-in Current Limit Function

PGOOD Output Voltage Monitoring (For AP3409A)

U-DFN3030-10 package

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

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

PGND

PVDD

U-DFN3030-10 (DN Package)

For AP3409A

Applications



Portable Media Player

Digital Still and Video Cameras

Notebook

Notes:

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

2. See http://www.diodes.com/quality/lead_free.html 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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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Typical Applications Circuit (Note 4)

V_IN

5V

C_COMP1000pF

R_COMP30k

R_OSC330k

SHDN/RT COMP

R2 240k

GND

SW

FB

VDD

PGND

PVDD

C1

22pF

R1

510k

C_IN

22mF

L1 2.0mH

V_OUT

2.5V/3A

C_OUT

22mF ×2

Typical Application of AP3409

V_IN

5V

C_COMP1000pF

R2 240k

R_COMP30k

R_OSC330k

SHDN/RT COMP

FB

GND

PGOOD

SW

R4

100k

VDD

(PVDD)

PGND

C1

22pF

R1

510k

C_IN

22mF

L1 2.0mH

V_OUT

2.5V/3A

C_OUT

22mF ×2

Typical Application of AP3409A

V_FB(R1 R2)

R2

V_OUT



Notes 4:

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Pin Descriptions

Pin Number

Pin Name

SHDN/RT

GND

Function

AP3409

AP3409A

Oscillator resistor input. Connect a resistor to GND from this pin to set the

switching frequency. Forcing this pin to V_DDto shutdown the device

Signal ground. All small-signal ground, such as the compensation

components and exposed pad should be connected to this, which in turn

connects to PGND at one point

1

2

Internal power switch output. Connect this pin with one terminal of the

inductor

SW

3, 4

PGND

PVDD

Power ground. Connect this pin as close as possible to C_INand C_OUT

Power Input Supply. Decouple this pin to PGND with a capacitor

5

6

6, 7

Signal input supply. Decouple this pin to GND with a capacitor. Normally

V_DDis equal to V_PVDD

VDD

8

7

8

Power good indicator. This pin is open-drain logic output that is pulled to

ground when the output voltage is not within ±12.5% of regulation point

Feedback voltage. This pin is the inverting input of internal error amplifier.

It senses the converter output voltage through an external resistor

divider. The internal reference voltage is 0.8V, which determines the

output voltage through the resistor divider

PGOOD

–

FB

9

Compensation input. This pin is the output of internal error amplifier.

Connect external compensation elements to this pin to stabilize the

control loop

COMP

10

Functional Block Diagram

SHDN/RT

1

6, 7

PVDD

CS

SD

SUM

Oscillator

10

9

COMP

FB

0.8V

EA

Clamp

SS

3, 4

PWM

OCP

SW

Control

Logic

5

2

0.4V

PGND

GND

DC

8

V_REF

VDD

UVLO

OTP

Functional Block Diagram of AP3409

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Functional Block Diagram (Cont.)

SHDN/RT

1

6

PVDD

CS

SD

SUM

Oscillator

10

9

COMP

FB

0.8V

EA

Clamp

SS

3, 4

PWM

OCP

SW

0.4V

Control

Logic

0.725V

0.9V

5

PGND

DC

8

PGOOD

V_REF

2

GND

UVLO OTP

7

VDD

Functional Block Diagram of AP3409A

Absolute Maximum Ratings (Note 5)

Symbol

Parameter

Unit

V

Rating

VDD Pin Voltage

-0.3 to 6

V_DD

V_PVDD

V_FB

V_COMP

V_SW

V_RT

θ_JA

PVDD Pin Voltage

-0.3 to 6

-0.3 to V_IN+0.3

-0.3 to 6

110

V

FB Pin Voltage

V

COMP Pin Voltage

V

SW Pin Voltage

V

SHDN/RT Pin Voltage

V

Thermal Resistance (Junction to Ambient)

Thermal Resistance (Junction to Case)

Operating Junction Temperature

Storage Temperature

ºC/W

ºC

V

3

θ_JC

+150

T_J

-65 to +150

+260

T_STG

T_LEAD

–

Lead Temperature (Soldering, 10 sec)

ESD (Machine Model)

200

–

ESD (Human Body Model)

2000

V

Note 5: 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.

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

Input Voltage

2.6

5.5

–

V

V_IN

I_{OUT (MAX)}

T_J

Maximum Output Current

3

A

Operating Junction Temperature

-40

+125

ºC

Electrical Characteristics (V_IN=V_DD=V_PVDD=3.3V, T_A=+25^oC, unless otherwise specified.)

Symbol

INPUT SECTION

V_DD

Parameter

Conditions

Min

Typ

Max

Unit

Input Voltage Range

Supply Current

2.6

–

5.5

V

V_FB=0.75V,

No Switching

–

460

–

µA

I_Q

Shutdown Supply Current

–

1

–

µA

V

I_SHDN

V_UVLO

V_HUVLO

Shutdown, V_IN=5.5V

Under Voltage Threshold Lockout

Under Voltage Hysteresis Lockout

2.2

300

V_DDRising

–

mV

FEEDBACK SECTION

Feedback Voltage

–

0.784

0.8

0.1

0.2

–

0.816

V

V_FB

I_FB

R_T

–

FB Pin Bias Current

–

0.4

–

µA

Current Sense Trans-resistance

Switching Leakage Current

Error Gain Amplifier Voltage

Error Amplifier Trans-conductance

–

1

µA

–

V_SHDN/RT=V_IN=5.5V

–

800

–

G_V

G_S

–

µA/V

OSCILLATOR SECTION

RT Pin Voltage

–

0.76

0.8

1

0.84

1.2

4

V

V_RT

MHz

%

R_OSC

Switching Frequency

Maximum Duty Cycle

f_OSC

ADJ Frequency

V_FB=0.75V

0.3

–

100

–

D_MAX

POWER SWITCH SECTION

AP3409

3.2

3.5

–

4.2

–

A

Ω

Switch Current Limit

I_LIMIT

V_FB=0.75V

AP3409A

–

Internal P-FET On Resistance

Internal N-FET On Resistance

0.11

0.16

0.17

R_PDSON

R_NDSON

I_SW=500mA

I_SW=-500mA

–

SHDN/RT SECTION

–

Shutdown Threshold

–

V

V_DD-0.7

V_DD-0.4

PGOOD SECTION (Only for AP3409A)

–

PGOOD Voltage Range

–

±12.5

±15

120

%

PGOOD Pull Down Resistance

–

Ω

TOTAL DEVICE

V_DD=2.6V to 5.5V,

V_OUT=2.5V

Output Current

3

–

A

I_OUT

V_DD=2.7V to 5.5V,

I_OUT=100mA

LNR

Output Voltage Line Regulation

–

0.4

%/V

LOD

t_SS

Output Voltage Load Regulation

Soft-start Time

–

±0.2

1.5

–

%

ms

ºC

I_OUT=0.01A to 3A

I

_OUT＝10mA

Thermal Shutdown Temperature

–

+160

T_OTSD

Thermal Shutdown Temperature

Hysteresis

–

+20

–

ºC

T_HYS

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Performance Characteristics (V_IN=V_DD=V_PVDD=3.3V, T_A=+25^oC, unless otherwise specified.)

Supply Current vs. Input Voltage

Supply Current vs. Ambient Temperature

700

600

500

400

300

200

100

600

500

400

300

200

100

V_IN=3.3V

V_FB=0.75V

-60

-30

0

30

60

90

120

150

Ambient Temperature (^oC)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Input Voltage (V)

Efficiency vs. Output Current

PMOS ON Resistance vs. Ambient Temperature

100

140

120

100

90

80

70

60

50

40

30

80

V_OUT=2.5V

V_IN=5.0V

V_IN=3.3V

V_FB=0.75V

60

V_IN=3.3V

-60

-30

0

30

60

90

120

150

Ambient Temperature (^OC)

0

500

1000

1500

2000

2500

3000

3500

Output Current (mA)

NMOS ON Resistance vs. Ambient Temperature

Frequency vs. Ambient Temperature

1.2

1.1

1.0

0.9

0.8

0.7

140

120

100

80

V_IN=3.3V

60

V_FB=0.85V

V_OUT=2.5V

-60

-30

0

30

60

90

120

150

-60

-30

0

30

60

90

120

150

Ambient Temperature (^OC)

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Performance Characteristics (Cont. V_IN=V_DD=V_PVDD=3.3V, T_A=+25^oC, unless otherwise specified.)

V_FBvs. Ambient Temperature

Current Limit vs. Ambient Temperature

0.9

0.8

0.7

0.6

0.5

5

4

3

2

V_IN=3.3V

V_OUT=2.5V

V_FB=0.75V

-60

-30

0

30

60

90

120

150

-60

-30

0

30

60

90

120

150

Ambient Temperature (^OC)

Start-up from VIN (V_IN=3.3V, V_OUT=2.5V, I_OUT=3A)

Load Transient Response

(V_IN=3.3V, V_OUT=2.5V, I_OUT=0.5A to 3A)

V_SW

2V/div

V_OUT(AC)

50mV/div

V_OUT

2V/div

I_OUT

1A/div

I_L

2A/div

Time 1ms/div

Time 200ms/div

Short Circuit Protection (V_IN=3.3V, V_OUT=2.5V)

Short Circuit Recovery (V_IN=3.3V, V_OUT=2.5V)

V_OUT

1V/div

V_OUT

1V/div

I_OUT

1A/div

I_OUT

1A/div

Time 4ms/div

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Ordering Information

AP3409X XX XX - XX

Version

Package

Packing

RoHS/Green

G1 : Green

Product Name

TR : Tape & Reel

DN: U-DFN3030-10

A: AP3409A

Blank: AP3409

Diodes IC’s Pb-free products with "G1" suffix in the part number, are RoHS compliant and green.

Package

Temperature Range

Part Number

AP3409DNTR-G1

AP3409ADNTR-G1

Marking ID

Packing

BDA

BCA

5000/Tape & Reel

U-DFN3030-10

-40 to +125C

Marking Information

AP3409 (Top View)

First Line: Logo and Marking ID

Second and Third Lines: Date Code

Y: Year

WW: Work Week of Molding

A: Assembly House Code

XX: 7^thand 8^thDigits of Batch No.

AP3409A (Top View)

First Line: Logo and Marking ID

Second and Third Lines: Date Code

Y: Year

WW: Work Week of Molding

A: Assembly House Code

XX: 7^thand 8^thDigits of Batch No.

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Package Outline Dimensions (All dimensions in mm(inch).)

(1) Package Type: U-DFN3030-10

0.250(0.010)

0.550(0.022)

1.500(0.059)

1.800(0.071)

0.500(0.020)

2.900(0.114)

3.100(0.122)

TYP

N6

N10

2.300(0.090)

2.500(0.098)

2.900(0.114)

3.100(0.122)

PIN#1 IDENTIFICATION

See DETAIL A

Pin 1 Mark

N5

N1

0.200(0.008)

0.300(0.012)

0.000(0.000)

0.050(0.002)

DETAIL A

A3

A

2

1

2

1

2

1

Pin 1 options

A

A3

Symbol

min(mm) max(mm) min(inch) max(inch) min(mm) max(mm) min(inch) max(inch)

0.800 0.028 0.031

0.253 0.006 0.010

0.153

0.150 (Typ) 0.006 (Typ)

Option1 0.700

0.570 0.630 0.022 0.025

Option2

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

Suggested Pad Layout

(1) Package Type: U-DFN3030-10

X1

Y1

X2

Y

Y2

E

Y

X1

Y1

X2

Y2

E

Dimensions

(mm)/(inch)

Value

3.300/0.130

0.300/0.012

0.600/0.024

2.600/0.102

1.800/0.071

0.500/0.020

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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2

A Product Line of

Diodes Incorporated

AP3409/A

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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January 2014

AP3409/A

Document number: DS36789 Rev. 2 - 2


型号：	AP3409
厂家：	DIODES INCORPORATED
描述：	HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER 功效
文件：	总11页 (文件大小：486K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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