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AP3429X

Synchronous Buck Converter

The AP3429X is a synchronous buck converter from Diodes Incorporated. View the full AP3429X datasheet below including absolute maximum ratings.

Manufacturer

Diodes Incorporated

Category

Synchronous Buck Converter

Overview

Part: AP3429/A — Diodes Incorporated

Type: 1.0MHZ, 2A Step-Down DC-DC Buck Converter

Description: A 2.7V to 5.5V input, 2A step-down DC-DC converter with 1MHz switching frequency, internal power switch, synchronous rectifier, and no external compensation required.

Operating Conditions:

  • Supply voltage: 2.7–5.5 V
  • Operating ambient temperature: -40 to 85 °C
  • Output voltage: 0.6V to VIN
  • Switching frequency: 1 MHz

Absolute Maximum Ratings:

  • Max supply voltage: 6 V
  • Max junction temperature: +150 °C

Key Specs:

  • Regulated Feedback Voltage: 0.588 V (Min), 0.6 V (Typ), 0.612 V (Max)
  • Quiescent Current: 90 μA (Typ) at V FB = 0.65V
  • Shutdown Current: 0.1 μA (Typ), 1 μA (Max) at V EN = 0V
  • Peak Inductor Current: 3 A (Min)
  • Oscillator Frequency: 1 MHz (Typ)
  • High-side R DS(ON): 110 mΩ (Typ) at I LX = 100mA
  • Low-side R DS(ON): 80 mΩ (Typ) at I LX = 100mA
  • Input UVLO Threshold: 2.4 V (Typ), 2.7 V (Max)

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
  • Overvoltage Protection
  • Thermal Shutdown
  • TSOT25 package

Applications:

  • 5V or 3.3V points of load conversions
  • Telecoms/networking equipment
  • Set-top boxes
  • Storage equipment
  • Video cards
  • DDR power supplies

Package:

  • 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
  • Overvoltage 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)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative.
  • https://www.diodes.com/quality/product-definitions/
  • Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
  1. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated's definitions of Halogen- and Antimony-free, "Green" and Lead-free.
  2. Halogen- and Antimony-free "Green' products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

Applications

  • 5V or 3.3V points of load conversions
  • Telecoms/networking equipment
  • Set-top boxes
  • Storage equipment
  • Video cards
  • DDR power supplies

AP3429/A

Pin Configuration

Absolute Maximum Ratings

SymbolParameterRatingUnit
V INInput Voltage-0.3 to 6V
V ENEN Pin Voltage-0.3 to V IN +0.3V
V LXLX Pin Voltage-0.3 to V IN +0.3V
V FBFeedback Pin Voltage-0.3 to V IN +0.3V
P DPower Dissipation (on PCB, T A = +25° C)0.4W
θ JAThermal Resistance (Junction to Ambient)220° C/W
θ JCThermal Resistance (Junction to Case, Simulation)130º C/W
T JOperating Junction Temperature+150° C
T STGStorage Temperature-55 to +150° C
V MMESD (Machine Model)200V
V HBMESD (Human Body Model)2000V

Recommended Operating Conditions

SymbolParameterMinMaxUnit
V INInput Voltage Range2.75.5V
T AOperating Ambient Temperature-4085° C
T JJunction Temperature Range-40125° C

AP3429/A

AP3429/A

Electrical Characteristics (@VIN = 5V, VOUT = 1.8V, L = 2.2μ H, CIN = 22μF , COUT = 22μF×2, TA = +25° C, unless otherwise specified.)

SymbolParametersConditionsMinTypMaxUnit
V INInput Voltage Range-2.7-5.5V
V FBRegulated Feedback Voltage-0.5880.60.612V
I FBFB Leakage CurrentV FB = 1V--0.2μA
I QQuiescent CurrentV FB = 0.65V-90-μA
I SDShutdown CurrentV EN = 0V-0.11μA
I LIMPeak Inductor Current-3--A
V SCPShort-Circuit Protection Latch Off Threshold--0.3-V
f OSCOscillator Frequency--1-MHz
R DS(ON)Drain to Source On-state ResistanceI LX = 100mA, high side-110-mΩ
R DS(ON)Drain to Source On-state ResistanceI LX = 100mA, low side-80-mΩ
V ENHEN High Threshold-1.5--V
V ENLEN Low Threshold---0.4V
I ENEN Leakage CurrentV IN = V EN = 5V-1.0-1.0μA
V UVLOInput UVLO Threshold--2.42.7V
V HYSUVLO Hysteresis--0.2-V
-Maximum Duty Cycle-100--%
R DSCHOutput Discharge Switch On- Resistance--50-Ω
T OTPOvertemperature Protection--+160-° C
T OTHOTP Hysteresis--+30-° C
V IOVPV IN Overvoltage Protection--6.25-V
V IHSYIOVP Hysteresis--0.25-V
t SSSoft-Start Time--1.8-ms

Typical Application

Package Information

Please see http://www.diodes.com/package-outlines.html for the latest version.

Related Variants

The following components are covered by the same datasheet.

Part NumberManufacturerPackage
AP3429Diodes Incorporated—
AP3429/ADiodes Incorporated—
AP3429ADiodes Incorporated—
AP3429AKTR-G1Diodes IncorporatedTSOT25
AP3429AKTTR-G1Diodes IncorporatedTSOT25
AP3429KTTR-G1Diodes IncorporatedTSOT25
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