AP1621BWA [ICT]

Dual Switching Controller, 0.1A, 360kHz Switching Freq-Max, PDSO5, SOT-23, 5 LEAD;


型号：	AP1621BWA
厂家：	InnoChips Technology
描述：	Dual Switching Controller, 0.1A, 360kHz Switching Freq-Max, PDSO5, SOT-23, 5 LEAD 光电二极管
文件：	总5页 (文件大小：180K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

AP1621

PWM/PFM Dual Mode Step-down DC/DC Controller

Features

General Descriptions

The AP1621 series are multi-functional step-down

DC/DC converters with built-in speed, low ON

resistance drivers. A more than 1A output current is

possible using an externally connected transistor,

coil, diode and capacitor.

- Input voltage range:2.2V~7V（V_OUTtype）

- Adjustable version（±2.5%）

- Oscillator frequency: 300KHz（±20%）

- High Efficiency: 92%（typ .）

- Stand-by capability: I_STB＝2µA.（Max .）

- Output voltage type possible（FB）

- Package: SOT23-5

Output voltage is set-up by external resistor（. ±2.5%

accuracy）.

With a 300KHz switching frequency, the size of the

external components can be reduced.

Control switches from PWM to PFM during light

loads with the AP1621（PWM/PFM switchable）and

the series is highly efficient from light loads to large

output currents.

Applications

● Electronic Information Organizers

● Palmtops

● Cellular and portable phones

● Portable Audio Systems

● Various Multi-function Power Supplies

During stand-by time （CE pin “LOW”）,current

consumption is reduced to less than 2µA.

With U.V.L.O internal, the external MOSFET. Will

be forcibly switched off if used below the stipulated

voltage.

Pin Assignment

Pin Descriptions

Pin No.

Function

Name

(Top View)

V _OUTExternal PMOSFET Connection

V_DD

V_OUT

GND Ground

V _DDPower Supply

Chip Enable:

AP1621A

AP1621B

H: Enable

L: Disable

Feedback pin

V_OUT

GND

GND FB

V_DD

SOT23-5

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.1.2 Dec. 23, 2004

1/5

AP1621

PWM/PFM Dual Mode Step-down DC/DC Controller

Ordering Information

AP1621X X X X X

Version

A : A version Blank: Adjustable

B : B version -33: 3.3V

Vout

Package

Packing

A : Taping

Lead Free

Blank : Normal

W : SOT23-5

L : Lead Free Package

Block Diagrams

V_DD

Phase

Compensation

Buffer,

V_out

Driver

PWM

Comparator

Ramp Wave

Vref with

PWM/PFM

Controller

Generator,

OSC

GND

Absolute Maximum Ratings

Ta=25°C

Parameter

Symbol

Rating

Unit

V_INPin Voltage

V_DD

V_OUT

V_FB

-0.3 ~ 8

V_OUTPin Voltage

FB Pin Voltage

-0.3

V_IN+0.3

-0.3

CE Pin Voltage

V_OUTPin Current

Continuous Total

Power Dissipation

Operating Ambient

Temperature

V_CE

±100

V_OUT

250

Topr

Tstg

-30 ~ +80

°C

Storage Temperature

-40 ~ +125

Anachip Corp.

www.anachip.com.tw

Rev. 1.2 Dec 23, 2004

2/5

AP1621

PWM/PFM Dual Mode Step-down DC/DC Controller

Electrical Characteristics

AP1621

（V_OUT＝3.3V, F_OSC＝300kHz）

Ta=25°C

Conditions

Parameter

Symbol

Min.

Typ.

Max. Unit

FB Voltage

V_FB

V_OUT

V_IN

1.1625

3.2

1.2

3.3

1.2375

Output Voltage

AP1621-33 only

3.4

Maximum Input Voltage

UVLO Voltage（Min.

Operating Voltage）

Same as I_DD, voltage required to

maintain H at V_OUT

V_UVLO

2.2

No external components,

Supply Current

I_DD

102

µA

CE=V_IN, V_OUT=0V

No external components,

CE=V_IN, V_OUT=0V

Stand-by Current

I_STB

Measuring of EXT/waveform,

V_IN=output voltage+0.3V

Oscillator Frequency

Fosc

240

300

360

KHz

Maximum Duty Ratio

PFM Duty Ratio

MAXDTY

100

PFMDTY No load (AP1621 only)

No external components, V_FB=0V,

CE ”High” Voltage

V_CEH

apply 0.65V (min.) to CE, determine 0.65

*Vcc

_OUT”Low”

Same as V_CEH, determine

EXT/”High”

CE ”Low” Voltage

Efficiency

V_CEL

0.20

*Vcc

EFFI

Measuring conditions: Unless otherwise specified, connect external components. V_IN=5.0V,L_OUT=220mA

Series Amendment:

AP1621

External Components: C_CE＝0.1µF, R_CE＝100kΩ

Anachip Corp.

www.anachip.com.tw

Rev. 1.2 Dec 23, 2004

3/5

AP1621

PWM/PFM Dual Mode Step-down DC/DC Controller

Typical Application Circuit

(1) AP1621-Adj

PMOS

OUT

C _FB

R_A

VCC

V_OUT

R_B

=~200K

VCC

AP1621

R_CE

100K

V_SS

C_CE

0.1uF

Vo = Vref × (1+

)

(2) AP1621-33 Only

PMOS

V_OUT

OUT

VCC

AP1621

R_CE

100K

V_SS

C_CE

0.1uF

Marking Information

XX : Identification code

(See Appendix)

Y : Year: 0-9

Appendix

Output

Part Number

XX Y M X

version

AP1621A

AP1621B

M : Month: A~L

ADJ

3.3V

X : Blank: normal

L: Lead Free Package

SOT23-5L

Anachip Corp.

www.anachip.com.tw

Rev. 1.2 Dec 23, 2004

4/5

AP1621

PWM/PFM Dual Mode Step-down DC/DC Controller

Package Information

Package Type: SOT23-5L

1(4x)

0.10

Seating Plane

2(4x)

With

Plating

Gauge Plane

0.25 mm

Base

Metal

Dimensions In Millimeters

Dimensions In Inches

Symbol

Min.

1.05

0.05

1.00

0.25

0.08

2.70

2.60

1.50

0.35

Nom.

1.20

0.10

1.10

Max.

1.35

0.15

1.20

0.55

0.45

0.20

0.15

3.00

1.70

0.55

Min.

Nom.

0.047

0.004

0.043

Max.

0.041

0.002

0.039

0.010

0.003

0.106

0.102

0.059

0.014

0.053

0.006

0.047

0.022

0.018

0.008

0.006

0.118

0.067

0.022

0.40

0.016

0.11

2.85

2.80

1.60

0.45

0.60 Ref.

0.95 Bsc.

1.90 Bsc.

5^o

0.004

0.112

0.110

0.063

0.018

0.024 Ref.

0.037 Bsc.

0.075 Bsc.

5^o

0^o

3^o

6^o

10^o

7^o

0^o

3^o

6^o

10^o

7^o

θ1

θ2

5^o

8^o

10^o

8^o

10^o

Anachip Corp.

www.anachip.com.tw

Rev. 1.2 Dec 23, 2004

5/5

AP1621BWA [ICT]

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