AP1580 Datasheet, PDF (1/9 Pages) Diodes Incorporated – PWM CONTROL 3A STEP-DOWN CONVERTER

AP1580
PWM CONTROL 3A STEP-DOWN CONVERTER
Features
• Input Voltage: 10V to 40V
• Adjustable Output Voltage from 0.8V to 0.9Vcc
• Duty Ratio: 0% to 90% PWM control
• Oscillation Frequency: 300KHz typical
• Short Circuit Protect Frequency: 30 KHz
• 2uA Maximum Standby Current
• Current Limit, Enable Function
• Thermal Shutdown Function
• Built-in Internal SW N-channel MOS
• Lead Free Finish/RoHS Compliant for Lead Free
products (Note 1)
• Lead-Free Package: SOP-8L
Applications
• Microprocessor Core Supply
• Networking Power Supply
• LCD MNT, TV Power Supply
• Telecom Power Supply
Ordering Information
General Description
AP1580 consists of step-down switching regulator with PWM control.
These devices include a reference voltage source, oscillation circuit,
error amplifier and internal NMOS.
AP1580 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 90%. 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 300 KHz to 30 KHz. Also, an internal
compensation block is built to minimize external component count.
With built-in power NMOS, a step-down switching regulator is easy
to be built by adding a coil, capacitors and a diode.
The high efficiency (>90%), low standby current, high input
voltage (40V) and output current (3A) combining with small
SOP-8L package give AP1580 unprecedented advantage in high
power system applications.
AP 1580 X X X
Package Lead - Free Packing
S: SOP- 8L L : Lead Free - U : Tube
-13 : Taping
Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
Package Packaging
Code
(Note 2)
Tube
Quantity
Part Number
Suffix
AP1580S
S
SOP-8L
100
-U
Lead-free
13” Tape and Reel
Quantity
Part Number
Suffix
2500/Tape & Reel
-13
Note: 2. 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.
AP1580 Rev. 1
1 of 9
www.diodes.com
JANUARY 2007
© Diodes Incorporated