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Diodes Semiconductor Electronic Components Datasheet

AP3417C Datasheet

1.5MHZ SYNCHRONOUS STEP-DOWN DC-DC CONVERTER

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AP3417C pdf
AP3417C
1.5MHz SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Description
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)
packages.
Pin Assignments
(Top View)
EN 1
GND 2
LX 3
5 FB
4 VIN
(Top View)
Pin 1 Mark
NC 1
6 FB
EN 2
EP
5 GND
VIN 3
4 LX
SOT-23-5
W-DFN2020-6 (Type US)
Applications
Post DC-DC Voltage Regulation
PDA and Notebook Computer
Features
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
Efficiency
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)
Notes:
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"
and Lead-free.
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.
AP3417C
Document number: DS36516 Rev. 2 - 2
1 of 12
www.diodes.com
May 2016
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP3417C Datasheet

1.5MHZ SYNCHRONOUS STEP-DOWN DC-DC CONVERTER

No Preview Available !

AP3417C pdf
Typical Applications Circuit
VIN=2.5V to 5.5V
CIN
4.7mF
AP3417C
VIN
GND
EN
L 2.2mH
LX
R1
FB
IR2 R2
COUT
10mF
VOUT
VOUT (V)
3.3
2.5
1.8
1.2
1.0
Component Guide
R1 (kΩ)
450
320
200
100
66
R2 (kΩ)
100
100
100
100
100
L (µH)
2.2
2.2
2.2
2.2
2.2
Pin Descriptions
Pin Number
SOT-23-5
W-DFN2020-6
(Type US)
12
25
34
43
56
1
Pin Name
EN
GND
LX
VIN
FB
NC
Chip enable pin. Active high
Ground pin
Switch output pin
Power supply
Feedback voltage of output
No internal connection
Function
AP3417C
Document number: DS36516 Rev. 2 - 2
2 of 12
www.diodes.com
May 2016
© Diodes Incorporated


Part Number AP3417C
Description 1.5MHZ SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
Maker Diodes
Total Page 12 Pages
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