AP1551S datasheet, PDF - EEWORLD Datasheet

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AP1551S: DescriptionDual Switching Controller, Voltage-mode, 3A, 173kHz Switching Freq-Max, BIPolar, PDSO16, LEAD FREE, SOP-16; CategoryPower/power management The power supply circuit; File Size172KB，8 Pages; ManufacturerDiodes Incorporated; Environmental Compliance

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AP1551S Overview

Dual Switching Controller, Voltage-mode, 3A, 173kHz Switching Freq-Max, BIPolar, PDSO16, LEAD FREE, SOP-16

AP1551S Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Diodes Incorporated
Parts packaging code	SOIC
package instruction	SOP, SOP16,.25
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	DUAL SWITCHING CONTROLLER
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	22 V
Minimum input voltage	4.5 V
Nominal input voltage	12 V
JESD-30 code	R-PDSO-G16
JESD-609 code	e3
length	9.9 mm
Number of functions	1
Number of terminals	16
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Maximum output current	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	173 kHz
technology	BIPOLAR
Temperature level	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	3.9 mm

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Not Recommended for New Design

AP1551

150KHz, Dual Channel 2A PWM Buck DC/DC Converter

Features

Dual adjustable output channel

Adjustable output voltage range, 1.23V

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-16L

Pb-Free

packages

Low power standby mode

Built-in switching transistor on chip

General Description

The AP1551 is monolithic IC designed for dual

channel step-down DC/DC converters, and own the

ability of driving a 2A load each channel without

additional transistor component. 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

is down to 0.5V below, the switching

frequency will be reduced. The AP1551 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 packages are available in a

standard 16-lead SOP-16 package.

Applications

Simple High-efficiency step-down regulator

On-card switching regulators

Positive to negative converter

Pin Assignments

( Top View )

GND2

SD2

IN2

SD1

IN1

GND1

GND2

Pin Descriptions

Name

IN1/2

OUT1/2

GND1/2

FB1/2

SD1/2

Description

Operating voltage input

Switching output

Ground

Output voltage feedback control

ON/OFF Shutdown

FB2

OUT2

FB1

OUT1

GND1

SOP-16L

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. 1.0 Nov 17, 2004

1/8

AP1551S Related Products

	AP1551S
Description	Dual Switching Controller, Voltage-mode, 3A, 173kHz Switching Freq-Max, BIPolar, PDSO16, LEAD FREE, SOP-16
Is it Rohs certified?	conform to
Maker	Diodes Incorporated
Parts packaging code	SOIC
package instruction	SOP, SOP16,.25
Contacts	16
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	DUAL SWITCHING CONTROLLER
control mode	VOLTAGE-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	22 V
Minimum input voltage	4.5 V
Nominal input voltage	12 V
JESD-30 code	R-PDSO-G16
JESD-609 code	e3
length	9.9 mm
Number of functions	1
Number of terminals	16
Maximum operating temperature	125 °C
Minimum operating temperature	-40 °C
Maximum output current	3 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	173 kHz
technology	BIPOLAR
Temperature level	AUTOMOTIVE
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	3.9 mm

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