1.5MHz SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
The AP3417C is a high efficiency step-down DC-DC voltage
converter. The chip operation is optimized by peak-current mode
architecture with built-in synchronous power MOSFET switchers. The
oscillator and timing capacitors are all built-in providing an internal
switching frequency of 1.5MHz that allows the use of small surface
mount inductors and capacitors for portable product implementations.
Integrated Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal
Shutdown Detection (TSD) and Short Circuit Protection are designed
to provide reliable product applications.
The device is available in adjustable output voltage version ranging
from 0.6V to 0.9×VIN when input voltage range is from 2.5V to 5.5V,
and is able to deliver up to 1A.
The AP3417C is available in SOT-23-5 and W-DFN2020-6 (Type US)
Pin 1 Mark
W-DFN2020-6 (Type US)
Post DC-DC Voltage Regulation
PDA and Notebook Computer
High Efficiency Buck Power Converter
Wide Input Voltage Range: 2.5V to 5.5V
Adjustable Output Voltage: 0.6V to 0.9×VIN
Low RDS(ON) Internal Switches: 200m (VIN = 5V)
Built-in Power Switches for Synchronous Rectification with High
Output Current: 1.0A
Feedback Voltage: 600mV
1.5MHz Constant Frequency Operation
Thermal Shutdown Protection
Low Dropout Operation at 100% Duty Cycle
No Schottky Diode Required
Input Over Voltage Protection
Output Over Voltage Protection
Over Current Protection
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Document number: DS36516 Rev. 2 - 2
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