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PDF AP3418 Data sheet ( Hoja de datos )
| Número de pieza | AP3418 | |
| Descripción | 1.4MHZ HIGH EFFICIENCY SYNCHRONOUS DC-DC BUCK CONVERTER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
AP3418
1.5A, 1.4MHZ HIGH EFFICIENCY SYNCHRONOUS DC-DC BUCK CONVERTER
Description
Pin Assignments
The AP3418 is a 1.4MHz fixed frequency, current mode, PWM
synchronous buck (step-down) DC-DC converter, capable of driving a
1.5A load with high efficiency, excellent line and load regulation. The
device integrates synchronous P-channel and N-channel power
MOSFET switches with low on-resistance. It is ideal for powering
portable equipment that runs from a single Li-ion battery.
A standard series of inductors are available from several different
manufacturers optimized for use with the AP3418. This feature greatly
simplifies the design of switch-mode power supplies.
The AP3418 is available in SOT25 package.
(Top View)
EN 1
GND 2
SW 3
5 FB
4 VIN
Features
SOT25
Input Voltage Range: 2.5V to 5.5V
Output Voltage: 0.6V to VIN
ADJ Output
Fixed 1.4MHz Frequency
High Efficiency up to 95%
Output Current: 1.5A
Current Mode Control
100% Duty Cycle in Dropout
Built-in Over Current Protection
Built-in Short Circuit Protection
Built-in Thermal Shutdown Protection
Built-in UVLO Function
Built-in Soft-start
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
LCD TV
Set-top Box
Datacom
Portable Device
Smart Phone
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.
Typical Applications Circuit
R2 R1
15
VIN EN FB
43
VIN SW
AP3418-ADJ
CIN
4.7F
GND
2
L
2.2H
COUT
22F
VOUT
AP3418
Document number: DS37233 Rev. 3 - 2
1 of 11
www.diodes.com
November 2014
© Diodes Incorporated
1 page  
A Product Line of
Diodes Incorporated
Performance Characteristics (VIN = 5V, TA = +25ºC, unless otherwise specified.)
AP3418
Efficiency vs. Output Current
Efficiency vs. Input Voltage
100
95
V = 5.0V
IN
V =1.8V
OUT
90
85
80
75
70
65
60
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Output Current (A)
100
95
90
85
80
75
70
65
60
55
V = 1.8V
50 OUT
I = 1.5A
OUT
45
40
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
Reference Voltage vs. Temperature
0.64
0.63
0.62
V = 5.0V
IN
0.61
0.60
0.59
0.58
0.57
0.56
-40
-20
0
20 40 60 80 100 120 140
Temperature (oC)
Frequency vs. Input Voltage
Switch Current Limit vs. Temperature
2.8
V = 5.0V
IN
2.6
2.4
2.2
2.0
1.8
-40 -20 0 20 40 60 80 100 120 140
Temperature (oC)
Frequency vs. Temperature
1.70
1.65
1.60
1.55
1.50
1.45
1.40
1.35
1.30
1.25
1.20
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
1.7
1.6 V = V = 5.0V
IN EN
1.5
1.4
1.3
1.2
1.1
1.0
-40
-20
0
20 40 60 80 100 120 140
Temperature (oC)
AP3418
Document number: DS37233 Rev. 3 - 2
5 of 11
www.diodes.com
November 2014
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
AP3418
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein 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 Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2014, Diodes Incorporated
www.diodes.com
AP3418
Document number: DS37233 Rev. 3 - 2
11 of 11
www.diodes.com
November 2014
© Diodes Incorporated
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AP3418.PDF ] | |
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