AP1604ASNL-7 - DIODES Incorporated

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 1 of 9 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

Lead-free

• Input voltage range: 2.2V~5.5V (VOUT type)

• Oscillator frequency: 600KHz (Typ.)

• Internal reference: 1.0V (Typ.)

• High efficiency: 93% (Typ.)

• Stand-by capability: ISTB=2µA. (Typ.)

• Soft-start time set-up externally type possible

• Current limit and thermal shutdown protection

• Packages: SOT25-5L, SON-6L (3×3×0.8mm)

• Lead Free Finish/RoHS Compliant for Lead Free and

“Green” products (Note 1)

• SOT25-5L: Available in “Green” Molding Compound

(No Br, Sb)

The AP1604 series are multi-functional step-down DC/DC

converters with built-in speed, low ON resistance drivers. It is

capable of delivering more than 800mA output current with

external coil, diode and capacitor.

Output voltage is set-up by the external resistors (±2.5%

accuracy). The 600KHz AP1604 that can work out with small

value external components comes out more compact board.

The device switches to and works under PFM mode with light

loads. It remains at high efficiency for both light loads and large

output current.

AP1604 can be soft-started with a proper capacitor connected

between CE/SS pin and ground. The stand-by current is less

than 2uA when CE/SS pin is at “LOW” status. The device is

forced to switch off as the voltage at that pin is lower than the

stipulated voltage.

Notes: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.

2. Green is for SOT25-5L.

7” Tape and Reel Device

(Note 3) Package Code Packaging Quantity Part Number Suffix

AP1604W W SOT25-5L 3000/Tape & Reel -7

AP1604SN SN SON-6L 2500/Tape & Reel -7

Note: 3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Features General Description

Ordering Information

AP1604

X

W: SOT25-5L

SN: SON-6L

(3*3*0.8mm)

Packing

- 7 : Taping

Package

A: AP

1604

Version Lead Free

L : Lead Free

G : Green (Note

2)

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 2 of 9 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

• Electronic Information Organizers

• Palmtops

• Cellular and portable phones

• Portable Audio Systems

• Various Multi-function Power Supplies

Pin Assignment

1 32

5 4

CE/SS

VOUT VCC

GND

SOT25-5L

FB

(Top View)

AP1604

SON-6L

1

2

34

5

6

GNDCE

FB

VCC

VOUT

SVCC

Pin Descriptions

Applications

Pin Name Function

VOUT Output Voltage

VCC Input Supply

GND Ground

CE/SS Chip Enable / Soft Start

FB Feedback pin

SVCC Signal Power for SON only

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 3 of 9 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

Block Diagram

Phase

Compensation

Vref with

CE

+

-

PWM/PFM

Controller

+

-

Ramp Wave

Generator,

OSC

V

OUT

CE/SS GND

VCC

PWM

Comparator

FB

Current Limit

Soft

Start

ERR

AMP

SVCC

Absolute Maximum Ratings Ta=25°C

Symbol Parameter Ratings Units

VCC/SVCC V

IN Pin Voltage -0.3 ~ 6.5 V

VOUT V

OUT Pin Voltage -0.3 ~ VIN+0.3 V

VFB FB Pin Voltage -0.3 ~ VIN+0.3 V

VCE/SS CE/SS Pin Voltage -0.3 ~ VIN+0.3 V

Pd Continuous Total

Power Dissipation Internal limited

Topr Operating Ambient

Temperature -25 ~ +80 °C

Tstg Storage Temperature -40 ~ +125 °C

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 4 of 9 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

Electrical Characteristics

VIN = 5V, VOUT＝2V, Load = 300mA, Ta = 25°C

Sym. Parameter Conditions Min. Typ. Max. Units

VFB FB 0.975 1.0 1.025 V

VIN Input Voltage 2.2 - 5.5 V

Line Regulation VIN = 2.2 ~ 5.5V, Load = 10mA - - 0.12 %

Load Regulation IOUT = 10 ~ 800mA - - 1.2 %

VUVLO UVLO Voltage（min.

operating voltage）

VCC, voltage required to maintain H at

VOUT - - 2 V

ICC Operating Current CE/SS = VIN, No Load - 100 150 µA

ICCQ Supply Current No external components,

CE/SS = VIN, VFB = 1.2V - 90 120 µA

ISTB Stand-by Current No external components,

CE/SS = 0V, VFB = 0V - 2 - µA

ICL Current Limit peak current

VIN = 5V, VOUT = 2V 800 1000 1200 mA

Fosc Oscillator Frequency Load = 300mA, VIN = 5V, VOUT = 2V 500 600 700 kHz

MAXDTY Maximum Duty Ratio 85 90 - %

PFMDTY PFM Duty Ratio No load 15 25 35 %

VCEH CE/SS ”High” Voltage Apply 1.4V (min.) to CE/SS, determine

VOUT ”High” 1.4 - - V

VCEL CE/SS ”Low” Voltage Same as VCEH, determine VOUT/”Low” - - 0.6 V

EFFI Efficiency VCC = 5V, VOUT = 3.3V, Load = 300mA - 93 - %

Rdson Rdson Condition IOUT = 300mA, VIN = 5V, VOUT = 2V - 350 450 mΩ

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 5 of 9 SEPTEMBER 2006

www.diodes.com © Diodes Incorporated

Typical Performance Characteristics

Vcc vs. Operating Current Vcc vs. Quiescent Curr ent

0

20

40

60

80

100

120

140

160

180

200

2.5 3 3.5 4 4.5 5 5.5

Vcc

(

V

)

Operating Current (uA)

0

20

40

60

80

100

120

140

160

180

200

2.5 3 3.5 4 4.5 5 5.5

Vcc (V)

Quiescent Current (uA)

Vcc vs. Stand-by Current Vcc vs. Frequency

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

2.5 3 3.5 4 4.5 5 5.5

Vcc (V)

Stand-by Current (uA)

500

520

540

560

580

600

620

640

660

680

700

2.5 3 3.5 4 4.5 5 5.5

Vcc (V)

Frequency (KHz)

Vcc vs. Current Limit Vcc vs. RDS(ON)

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

33.544.555.5

Vcc

(

V

)

Current Limit (A)

Current Limit

Vo u t= 2 V

0

100

200

300

400

500

600

2.5 3 3.5 4 4.5 5 5.5

RDS(ON) (mΩ)

Vcc (V)

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 6 of 9 SEPTEMBER 2006

Typical Performance Characteristics (Continued)

Line Regulation Load Regulation

-0.3

-0.2

-0.1

0.0

0.1

0.2

0.3

2.533.544.555.5

Vcc (V)

V / VOUT (%)

-3

-2

-1

0

1

2

3

0 100 200 300 400 500 600 700 800

Load (mA)

V / VOUT (%)

Typical Application Circuit

0.1uF

VIN

FB

VCC

GND

10uH

AP1604

VOUT

CE/SS

68uF

2.2V ~ 5.5V

B240A R2

R1 0.1uF 68uF

VOUT

10nF

100nF

~

1MΩ

Vout = 1

×

(1 + R1

R2 )

R1 = 100K ~ 200K

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 7 of 9 SEPTEMBER 2006

Marking Information

(1) SOT25-5L

XX : Identification code

Y : Year: 0-9

M : Month: A~L

X : Blank : Lead-Free

G : Green

XX Y M

7

123

45

X

Part Number Package Identification

Code

AP1604W SOT25-5L ER

(2) SON-6L (3*3*0.8mm)

Date Code

Year: 0~9

Month: A~L

Identification Code

XX

Part Number Package Identification

Code

AP1604SN SON-6L

(3*3*0.8mm) S4

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 8 of 9 SEPTEMBER 2006

Package Information

(1) Package Ty pe: SOT25-5L

0.08/0.20 Typ 0.15

0.013/0.10

Typ 0.05 0.35/0.55

Typ 0.40

Typ

0.95

1.50/1.70

Typ 1.60

2.60/3.00

Typ 2.80

2.70/3.10

Typ 3.00

1.00/1.30

Typ 1.10

Typ

0.55

TOP VIEW

(2) SON-6L (3×3×0.8mm)

AP1604

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604 Rev. 1 9 of 9 SEPTEMBER 2006

IMPORTANT NOTICE

LIFE SUPPORT

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further

notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither

does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages.

Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the

President of Diodes Incorporated.