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PDF AP3429A Data sheet ( Hoja de datos )
| Número de pieza | AP3429A | |
| Descripción | 2A STEP-DOWN DC-DC BUCK CONVERTER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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AP3429/A
1.0MHZ, 2A STEP-DOWN DC-DC BUCK CONVERTER
Description
The AP3429/A is a 2A step-down DC-DC converter. At heavy load,
the constant frequency PWM control performs excellent stability and
transient response. No external compensation components are
required.
The AP3429/A supports a range of input voltages from 2.7V to 5.5V,
allowing the use of a single Li+/Li- polymer cell, multiple
Alkaline/NiMH cell, and other standard power sources. The output
voltage is adjustable from 0.6V to the input voltage. The AP3429/A
employs internal power switch and synchronous rectifier to minimize
external part count and realize high efficiency. During shutdown, the
input is disconnected from the output and the shutdown current is less
than 1μA. Other key features include over-temperature and short
circuit protection, and under-voltage lockout to prevent deep battery
discharge.
The AP3429/A delivers 2A maximum output current while consuming
only 90μA of no-load quiescent current. Ultra-low RDS(ON) integrated
MOSFETs and 100% duty cycle operation make the AP3429/A an
ideal choice for high output voltage, high current applications which
require a low dropout threshold.
The AP3429/A is available in TSOT25 package.
Applications
5V or 3.3V Point of Load Conversion
Telecom/Networking Equipment
Set Top Boxes
Storage Equipment
Video Cards
DDR Power Supply
Pin Assignments
(Top View)
EN 1
GND 2
LX 3
5 FB
4 VIN
TSOT25
Features
Output Current: Up to 2A
Output Voltage: 0.6V to VIN
Input Voltage: 2.7V to 5.5V
Shutdown Current: <1μA
100% Duty Cycle Operation
1MHz Switching Frequency
Internal Soft Start
No External Compensation Required
Short Circuit Protection
AP3429: Latch Off Protection
AP3429A: Hiccup Mode Protection
Over Voltage Protection
AP3429: Latch Off Protection
AP3429A: No Latch Off Protection
Thermal Shutdown
TSOT25 package
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.
AP3429/A
Document number: DS36561 Rev. 3 - 2
1 of 11
www.diodes.com
August 2015
© Diodes Incorporated
1 page  
AP3429/A
Electrical Characteristics (@VIN = 5V, VOUT = 1.8V, L = 2.2µH, CIN = 22µF, COUT = 22µF×2, TA = +25°C, unless otherwise
specified.)
Symbol
VIN
VFB
IFB
IQ
ISD
ILIM
VSCP
fOSC
RDS(ON)
VENH
VENL
IEN
VUVLO
VHYS
–
RDSCH
TOTP
TOTH
VIOVP
VIHSY
tSS
Parameters
Input Voltage Range
Regulated Feedback Voltage
FB Leakage Current
Quiescent Current
Shutdown Current
Peak Inductor Current
Short Circuit Protection Latch
Off Threshold
Oscillator Frequency
Drain to Source On-state
Resistance
EN High Threshold
EN Low Threshold
EN Leakage Current
Input UVLO Threshold
UVLO Hysteresis
Maximum Duty Cycle
Output Discharge Switch On
Resistance
Over Temperature Protection
OTP Hysteresis
VIN Over Voltage Protection
IOVP Hysteresis
Soft-start Time
Conditions
–
–
VFB = 1V
VFB = 0.65V
VEN = 0V
–
–
–
ILX = 100mA, high side
ILX = 100mA, low side
–
–
VIN = VEN = 5V
–
–
–
–
–
–
–
–
–
Min
2.7
0.588
–
–
–
3
–
–
–
–
1.5
–
-1.0
–
–
100
–
–
–
–
–
–
Typ
–
0.6
–
90
0.1
–
0.3
1
110
80
–
–
–
2.4
0.2
–
50
+160
+30
6.25
0.25
1.8
Max
5.5
0.612
0.2
–
1
–
–
–
–
–
–
0.4
1.0
2.7
–
–
–
–
–
–
–
–
Unit
V
V
μA
μA
μA
A
V
MHz
mΩ
V
V
μA
V
V
%
Ω
°C
°C
V
V
ms
AP3429/A
Document number: DS36561 Rev. 3 - 2
5 of 11
www.diodes.com
August 2015
© Diodes Incorporated
5 Page 
AP3429/A
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 © 2015, Diodes Incorporated
www.diodes.com
AP3429/A
Document number: DS36561 Rev. 3 - 2
11 of 11
www.diodes.com
August 2015
© Diodes Incorporated
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AP3429A.PDF ] | |
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