ap1551 ETC-unknow, ap1551 Datasheet

ap1551

Manufacturer Part Number

ap1551

Description

150khz, Dual Channel 2a Pwm Buck Dc/dc Converter

Manufacturer

ETC-unknow

Datasheet

1.AP1551.pdf (8 pages)

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

- Dual adjustable output channel

- Adjustable

- 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

- Simple High-efficiency step-down regulator

- On-card switching regulators

- Positive to negative converter

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.

18V+4%

Pin Assignments

Features

Applications

GND2

GND1

SD1

SD2

IN1

IN2

output

( Top View )

SOP-16L

voltage

range,

GND2

FB2

GND1

FB1

OUT1

OUT2

1.23V

1/8

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

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

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.

GND1/2

Name

SD1/2

FB1/2

General Description

Pin Descriptions

OUT1/2

IN1/2

into

is down to 0.5V below, the switching

Operating voltage input

Switching output

Ground

Output voltage feedback control

ON/OFF Shutdown

standby

Description

mode.

Rev. 1.0 Nov 17, 2004

AP1551

The

internal

Related parts for ap1551

ap1551 Summary of contents

Page 1

... 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. General Description The AP1551 is monolithic IC designed for dual range, 1.23V ...

Page 2

... Source Reference bias + Amp _ FB1 Anachip Corp. www.anachip.com.tw AP 1551 X X Package Packing S: SOP-16L Blank : Tube A : Taping SD1 200mV 2.5V Start Regulator up + Comp _ _ Comp + Frequecy compen- sation _ Comp Pre-driver + 150kHz Thermal OSC. Shutdown 2/8 AP1551 V IN1 220mV 2A Switch V OUT1 GND Rev. 1.0 Nov 17, 2004 ...

Page 3

... IN1/2 V =12V force driver off FB1/2 ON/OFF pin=5V V =22V IN1/2 Low (regulator ON) High (regulator OFF) V =2.5V (OFF) LOGIC =0.5V (ON) LOGIC Junction to SOP-16L case Junction to SOP-16L ambient 3/8 AP1551 Unit Min. Typ. Max. Unit -50 - -10 nA -100 127 150 173 ...

Page 4

... Dual Channel 2A PWM Buck DC/DC Converter Electrical Characteristics (Continued) Symbol V FB1 AP1551-channel 1 η V FB2 AP1551-channel 2 η Specifications with boldface type are for full operating temperature range, the other type are for T Typical Application Circuit OFF ON 12V DC input OFF ON Cin 820uF Anachip Corp. ...

Page 5

... Temperature (TA) (°C) Anachip Corp. www.anachip.com.tw AP1551 Efficiency v.s. Temperature (Vin=12V,Vout=3.3V,Io=2A 110 130 150 -50 -30 -10 10 AP1551 Switch Current Limit v.s. Temperature 5.5 5 4.5 4 3.5 3 -50 -30 75 100 125 110 130 150 -50 -30 -10 10 ...

Page 6

... AP1551 Output Voltage v.s. Temperature (Vin=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 - 100 120 140 160 Temperature (TA) (°C) Anachip Corp. www.anachip.com.tw AP1551 ON/OFF Current v.s. ON/OFF Voltage 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 110 130 150 AP1551 Feedback Current v.s. Temperature (Vcc=12V , Vout=5V,Vfb=1.3V -10 -20 -30 -40 ...

Page 7

... The data for these curves was taken with the AP1551 (SOP-16 package) operating as a buck-switching regulator in an ambient temperature of 25 temperature rise numbers are all approximate and there are many factors that can affect these temperatures ...

Page 8

... AP1551 ID code: internal Xth week: 01~52 Year: "01" = 2001 "02" = 2002 θ L VIEW "A" 0.015x45 (4X) VIEW "A" Nom. Max. 0.063 0.069 - 0.010 0.057 0.059 0.016 0.020 0.008 0.0098 ...

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