AP1507D5L [ANACHIP]

Switching Regulator/Controller, Voltage-mode, 3A, 173kHz Switching Freq-Max, BIPolar;


型号：	AP1507D5L
厂家：	ANACHIP CORP
描述：	Switching Regulator/Controller, Voltage-mode, 3A, 173kHz Switching Freq-Max, BIPolar
文件：	总9页 (文件大小：148K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀ Features

ꢀ General Description

- Output voltage: 3.3V, 5V, 12V and adjustable

output version

The AP1507 series are monolithic IC designed for a

step-down DC/DC converter, and own the ability of

driving a 3A load without external transistor. Due to

reducing the number of external component, the

board space can be saved easily. The external

shutdown function can be controlled by logic level

and then come into standby mode. The internal

compensation makes feedback control have 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 occurred

and V_FBis down to 0.5V below, the switching

frequency will be reduced. The AP1507 series

operates at a switching frequency of 150KHz thus

allowing 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 package is available in a 5-lead TO-252.

- 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: 3A

- TO252-5L packages

- Low power standby mode

- Built-in switching transistor on chip

ꢀ Applications

- Simple High-efficiency step-down regulator

- On-card switching regulators

- Positive to negative converter

ꢀPin Assignments

ꢀ Pin Descriptions

Name

Description

( Top View )

V_IN

Output

GND

Operating voltage input

Switching output

Ground

5 SD

4 FB

3 Gnd

2 Output

1 VIN

Output voltage feedback control

Metal Tab GND

ON/OFF Shutdown

TO252-5L

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev. 0.2 Jan 16, 2004

1/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀ Ordering Information

AP1507 XX X X X

Output version

Package

Lead Free

Packing

D5: TO252-5L Blank : Normal

Blank : Adjustable

-33 : 3.3V

Blank : Tube

L : Lead Free Package

: Taping

-50 : 5.0V

-12 : 12V

ꢀ Block Diagram

V_IN

200mV

220mV

Current

Source

bias

1.235V

2.5V

Start

Reference

Regulator

Comp

Frequecy

compen-

sation

Amp

Comp

Pre-driver

Switch

Output

Gnd

150kHz

OSC.

Thermal

Limit

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

2/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀ Absolute Maximum Ratings

Symbol

Parameter

Supply Voltage

Rating

Unit

V_CC

V_SD

V_FB

V_OUT

P_D

T_ST

T_OP

V_OP

+24

-0.3 to +18

-1

ON/OFF Pin input voltage

Feedback Pin voltage

Output voltage to Ground

Power dissipation

Storage temperature

Operating temperature

Operating voltage

Internally limited

-65 to +150

-40 to +125

+4.5 to +22

^oC

ꢀ Electrical Characteristics (All Output Voltage Versions)

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

Symbol

Parameter

Conditions

V_FB=1.3V

(Adjustable version only)

Min.

Typ.

Max.

Unit

-50

-100

173

I_B

Feedback bias current

-10

127

150

F_OSC

F_SCP

Oscillator frequency

KHz

110

Oscillator frequency of When current limit occurred

1.6

1.7

short circuit protect

and V_FB< 0.5V, Ta=25 ^oC

_OUT=3A

V_SAT

I_CL

Saturation voltage

1.4

No outside circuit

V_FB=0V force driver on

V_FB=12V force driver off

Peak current

Max. Duty Cycle (ON)

Min. Duty Cycle (OFF)

100

5.5

6.5

Current limit

No outside circuit

3.6

4.5

V_FB=0V force driver on

Output No outside circuit

Output = 0V

-200

I_LEAK

leakage V_FB=12V force driver off

current

Quiescent Current

Output = -1V

V_IN=22V

-5

I_Q

V_FB=12V force driver off

150

Standby Quiescent

ON/OFF pin=5V

V_IN=22V

I_STBY

Current

200

0.6

V_IL

V_IH

Low (regulator ON)

ON/OFF pin logic input

threshold voltage

1.3

High (regulator OFF)

2.0

ON/OFF pin logic input

current

ON/OFF pin input current

Thermal Resistance

I_H

I_L

V_LOGIC=2.5V (OFF)

-0.01

-1

_LOGIC=0.5V (ON)

-0.1

Junction to

TO252-5L

^oC/W

case

Thermal Resistance

With copper area of

Junction to

ambient

TO252-5L

approximately 2cm ×2cm

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

Anachip Corp.

www.anachip.com.tw

3/9

Rev. 0.2 Jan 16, 2004

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀ Electrical Characteristics (Continued)

Symbol

V_FB

Parameter

Conditions

Typ.

Limit

Unit

5V < V_IN< 22V

0.2A < I_LOAD< 3A

V_OUTprogrammed for

Output

1.23

1.193/

V_MIN

V_MAX

1.18

Feedback

AP1507-ADJ

1.267/1.28

Efficiency

Output voltage

Efficiency

_IN= 12V, I_LOAD=3A

3.3

5.5V < V_IN< 22V

0.2A < I_LOAD< 3A

3.168/3.135

V_OUT

V_MIN

V_MAX

3.432/

3.465

AP1507-3.3V

AP1507-5V

AP1507-12V

V_IN= 12V, I_LOAD=3A

8V < V_IN< 22V

4.8/4.75

5.2/5.25

V_OUT

Output voltage

Efficiency

V_MIN

V_MAX

0.2A < I_LOAD< 3A

V_IN= 12V, I_LOAD=3A

15V < V_IN< 22V

11.52/

11.4

V_OUT

Output voltage

Efficiency

V_MIN

V_MAX

0.2A < I_LOAD< 3A

12.48/12.6

V_IN= 16V, I_LOAD= 3A

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

Anachip Corp.

www.anachip.com.tw

4/9

Rev. 0.2 Jan 16, 2004

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀTypical Performance Characteristics

AP1507 Efficiency v.s. Temperature

(Vin=12V,Vout=5V,Io=3A)

AP1507 Efficiency v.s. Temperature

(Vin=12V,Vout=3.3V,Io=3A)

-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)

AP1507 Saturation Voltage v.s. Temperature

(Vcc=12V,Vfb=0V,VSD=0)

AP1507 Switch Current Limit v.s. Temperature

(Vcc=12V,Vfb=0V)

1.6

1.5

1.4

5.5

1.3

1.2

1.1

4.5

0.5A

0.9

0.8

0.7

3.5

-50

-30

-10

-50

-25

100

125

Temperature (TA)ꢀ(°C)

Temperature (TA) (°C)

AP1507 Supply Current v.s. Temperature

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

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)

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

5/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀTypical Performance Characteristics (Continued)

AP1507 Threshold Voltage v.s. Temperature

AP1507 ON/OFF Current v.s. ON/OFF Voltage

(Vcc=12V , Io=100mA)

(Vin=12V)

1.7

1.6

1.5

1.4

1.3

1.2

1.1

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

0.9

0.8

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

Temperature (TA) (°C)

ON/OFF Voltage (V)

AP1507 Frequency v.s. Temperature

(Vcc=12V , Io=500mA ,Vout=5V)

AP1507 Feedback Current v.s. Temperature

(Vcc=12V , Vout=5V,Vfb=1.3V)

170

165

160

155

150

145

140

-10

-20

-30

-40

-50

-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)

AP1507 Output Voltage v.s. Temperature

(Vin=12V ,Io=3A)

3.5

3.45

3.4

3.35

3.3

3.25

3.2

3.15

3.1

3.05

2.95

2.9

-40 -20

20 40 60 80 100 120 140 160

Temperature (TA) (°C)

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

6/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀTypical Application Circuit

12V

3.3V/3A

DC Input

Output

Output Load

AP1507

-33

Vin

Inductor

Gnd

Capacitor

Schottky Diode

ꢀFunction Description

Pin Functions

+V_IN

Thermal Considerations

The TO-252 surface mount package tab is

designed to be soldering to the copper on a printed

circuit board. The copper and the board are the

heat sink for this package and the other heat

producing components, such as the catch diode

and inductor. The PC board copper area that the

package is soldered to should be at least 0.8 in²,

and ideally should have 2 or more square inches of

2 oz. Additional copper area improves the thermal

characteristics, but with copper areas greater than

approximately 6 in², only small improvements in

heat dissipation are realized. If further thermal

improvements are needed, double sided,

multi-layer PC board with large copper areas and/or

airflow will be recommended.

This is the positive input supply for the IC switching

regulator. A suitable input bypass capacitor must be

present 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

kept a minimum.

Feedback (FB)

Senses the regulated output voltage to complete

the feedback loop.

ON/OFF (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 ON /OFF pin can be

wired to the ground pin or it can be left open, in

either case the regulator will be in the ON condition.

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

7/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀFunction Description (Continued)

The

AP1507

(TO-252

package)

junction

air, and moving air lowers the thermal resistance

even further.

temperature rises above ambient temperature with

a 3A load for various input and output voltages.

This data was taken with the circuit operating as a

buck-switching regulator with all components

mounted on a PC board to simulate the junction

temperature under actual operating conditions.

This curve can be used for a quick check for the

approximate junction temperature for various

conditions, but be aware that there are many

factors that can affect the junction temperature.

When load currents higher than 3A are used,

double sided or multi-layer PC boards with large

copper areas and/or airflow might be needed,

especially for high ambient temperatures and high

output voltages.

Package

thermal

resistance

and

junction

temperature rise numbers are all approximate, and

there are many factors that will affect these

numbers. 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.

For the best thermal performance, wide copper

traces and generous amounts of printed circuit

board copper should be used in the board layout.

(Once exception to this 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

ꢀMarking Information

TO252-5L

(Top view)

Part Number

Output Type:

Blank: Adjustable

33: 3.3V

Logo

Blank: normal

1507 - XX

L: Lead Free Package

X X X X X X

ID Code

50: 5.0V

Xth Week: 01~52

Year: "01" = 2001

"02" = 2002

12: 12V

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

8/9

AP1507

150KHz, 3A PWM Buck DC/DC Converter

ꢀ Package Information

Package Type: TO252-5L

P(TYP.)

Dimensions In Millimeters

Symbol

Dimensions In Inches

Min.

6.35

5.20

6.80

2.20

Nom.

6.60

Max.

6.85

5.50

7.20

2.80

Min.

Nom.

Max.

0.250

0.205

0.268

0.087

0.260

0.211

0.270

0.217

0.283

0.110

5.35

7.00

2.50

0.276

0.098

0.050 REF.

0.026

1.27 REF.

0.65

0.50

0.40

2.20

0.46

0.00

0.90

5.40

0.80

0.60

2.40

0.58

0.15

1.50

5.59

0.020

0.031

0.50

2.30

0.52

0.08

0.016

0.087

0.018

0.000

0.035

0.213

0.020

0.091

0.020

0.003

0.047

0.216

0.024

0.094

0.023

0.006

0.059

0.220

1.20

5.50

Anachip Corp.

www.anachip.com.tw

Rev. 0.2 Jan 16, 2004

9/9

AP1507D5L [ANACHIP]

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