ap1534 Diodes, Inc., ap1534 Datasheet

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ap1534

Manufacturer Part Number
ap1534
Description
Pwm Control 2a Step-down Converter
Manufacturer
Diodes, Inc.
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
AP1534
Manufacturer:
DIODES/美台
Quantity:
20 000
Part Number:
ap1534SG-13
Manufacturer:
DIODES
Quantity:
57 500
Part Number:
ap1534SG-13
Manufacturer:
DIODES
Quantity:
20 000
Part Number:
ap1534SG-13
Manufacturer:
DIODES
Quantity:
150
Part Number:
ap1534SG-13
Manufacturer:
DIODES/美台
Quantity:
20 000
Company:
Part Number:
ap1534SG-13
Quantity:
17 500
Features
Applications
Ordering Information
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Note:
AP1534 Rev. 2
AP1534S
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
Device
http://www.diodes.com/datasheets/ap02001.pdf.
Input voltage: 4.4V to 18V
Output voltage: 0.8V to V
Duty ratio: 0% to 99% PWM control
Oscillation frequency: 300KHz typ.
Current limit, Enable function
Thermal Shutdown function
Built-in internal SW P-channel MOS
SOP-8L: Available in “Green” Molding Compound
Lead Free Finish/RoHS Compliant (Note 1)
PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
Microprocessor Core Supply
(no Br, Sb)
Package
Code
S
S : SOP-8L
Package
CC
Packaging
.
(Note 2)
SOP-8L
A P 1 5 3 4 X X X
www.diodes.com
Quantity
100
Lead Free
PWM CONTROL 2A STEP-DOWN CONVERTER
G : Green
1 of 8
Tube
General Description
AP1534 consists of step-down switching regulator with PWM
control. These devices include a reference voltage source,
oscillation circuit, error amplifier, internal PMOS.
AP1534 provides low-ripple power, high efficiency, and excellent
transient characteristics. The PWM control circuit is able to vary
the duty ratio linearly from 0 up to 99%. This converter also
contains an error amplifier circuit as well as a soft-start circuit that
prevents overshoot at startup. An enable function, an over
current protect function and a short circuit protect function are built
inside, and when OCP or SCP happens, the operation frequency
will be reduced from 300KHz to 50KHz. Also, an internal
compensation block is built in to minimize external component
count.
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally, these ICs can
function as step-down switching regulators. They serve as ideal
power supply units for portable devices when coupled with the
SOP-8L mini-packages, providing such outstanding features as
low current consumption. Since this converter can accommodate
an input voltage up to 18V, it is also suitable for the operation via
an AC adapter.
Part Number
Suffix
-U
-13 : Tape & Reel
-U : Tube
Packing
2500/Tape & Reel
Quantity
13” Tape and Reel
DECEMBER 2007
©
AP1534
Diodes Incorporated
Part Number
Suffix
-13

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ap1534 Summary of contents

Page 1

... AP1534 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS. AP1534 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 99%. This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup ...

Page 2

... Add an external resistor to set max output current power supply pin CC Switch Pin. Connect external inductor/diode here. Minimize Output 5, 6 trace area at this pin to reduce EMI GND Pin SS AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER Vss Vss AP1534 3 6 Output ...

Page 3

... Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Recommended Operating Conditions Symbol V Input Voltage IN I Output Current OUT T Operating Ambient Temperature A AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER Output Oscillation Reference Voltage Circuit PWM-Switched Control Circuit 100uA V EN OCSET EN ...

Page 4

... Typical Application Circuit OCSET OCSET 5.6K Option C IN 470uF R EN CVcc 100K 0.1uF C EN 0.1uF Note: 4. Suggested DIODES Power Schottky P/N: B240/B340 series. AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER ( V = 12V 25°C, unless otherwise specified ) IN A Conditions I = 0.1A OUT I = 0.1A OUT -- 5V~18V ...

Page 5

... I =0.2A) OUT OUT 3.0% 2.0% 1.0% 0.0% -1.0% -2.0% -3. (V) IN Efficiency 100 0.0 0.5 1.0 I (A) OUT AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER 0.820 0.815 0.810 0.805 0.800 0.795 0.790 0.785 0.780 1.0% 0.8% 0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1. 0.0 VOUT=3.3V VOUT=5V 1.5 2 www.diodes.com AP1534 ...

Page 6

... Vout=3.3V, Iout=0.1A) Test Circuit open OUTPUT V CC OCSET Enable function test OUTPUT V CC OCSET + Operation function test AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER (Continued) (Vin=5V, Vout=3.3V, Iout=2A) open www.diodes.com AP1534 Vout Ripple OUTPUT OCSET ...

Page 7

... Under Voltage Lockout The under voltage lockout circuit of the AP1534 assures that the high-side MOSFET driver remains in the off state whenever the supply voltage drops below 3.3V. Normal operation resumes once V rises above 3 ...

Page 8

... 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. AP1534 Rev. 2 PWM CONTROL 2A STEP-DOWN CONVERTER (All Dimensions in mm) Detail " ...

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