AP3429
Synchronous Buck ConverterThe AP3429 is a synchronous buck converter from Diodes Incorporated. View the full AP3429 datasheet below including key specifications, absolute maximum ratings.
AP3429 shares its datasheet with AP3429AKTR-G1, whose page lists every part number it covers.
Official AP3429 datasheet (PDF) — the source this page was extracted from.
AP3429 Key Specifications
| Parameter | Value |
|---|---|
| UVLO Threshold | 2.4V typ (2.7V max) |
| Soft-Start Time | 1.8ms |
| Low-Side RDS(ON) | 80mΩ |
| Shutdown Current | <1μA (1μA max) |
| High-Side RDS(ON) | 110mΩ |
| Quiescent Current | 90μA (typical) |
| Maximum Duty Cycle | 100% |
| Input OVP Threshold | 6.25V |
| Input Voltage Range | 2.7V to 5.5V |
| Switching Frequency | 1MHz |
| Output Voltage Range | 0.6V to VIN |
| Maximum Output Current | 2A |
| Feedback Reference Voltage | 0.6V (0.588V to 0.612V) |
| Junction Temperature Range | -40°C to +125°C |
| Overtemperature Protection | +160°C |
| Peak Inductor Current Limit | 3A (min) |
| Operating Ambient Temperature | -40°C to +85°C |
AP3429 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
AP3429 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.
- 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.
- 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 Applications
- 5V or 3.3V points of load conversions
- Telecoms/networking equipment
- Set-top boxes
- Storage equipment
- Video cards
- DDR power supplies
AP3429/A
AP3429 Pin Configuration
AP3429 Absolute Maximum Ratings
| Symbol | Parameter | Rating | Unit |
|---|---|---|---|
| V IN | Input Voltage | -0.3 to 6 | V |
| V EN | EN Pin Voltage | -0.3 to V IN +0.3 | V |
| V LX | LX Pin Voltage | -0.3 to V IN +0.3 | V |
| V FB | Feedback Pin Voltage | -0.3 to V IN +0.3 | V |
| P D | Power Dissipation (on PCB, T A = +25° C) | 0.4 | W |
| θ JA | Thermal Resistance (Junction to Ambient) | 220 | ° C/W |
| θ JC | Thermal Resistance (Junction to Case, Simulation) | 130 | º C/W |
| T J | Operating Junction Temperature | +150 | ° C |
| T STG | Storage Temperature | -55 to +150 | ° C |
| V MM | ESD (Machine Model) | 200 | V |
| V HBM | ESD (Human Body Model) | 2000 | V |
AP3429 Recommended Operating Conditions
| Symbol | Parameter | Min | Max | Unit |
|---|---|---|---|---|
| V IN | Input Voltage Range | 2.7 | 5.5 | V |
| T A | Operating Ambient Temperature | -40 | 85 | ° C |
| T J | Junction Temperature Range | -40 | 125 | ° 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.)
| Symbol | Parameters | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| V IN | Input Voltage Range | - | 2.7 | - | 5.5 | V |
| V FB | Regulated Feedback Voltage | - | 0.588 | 0.6 | 0.612 | V |
| I FB | FB Leakage Current | V FB = 1V | - | - | 0.2 | μA |
| I Q | Quiescent Current | V FB = 0.65V | - | 90 | - | μA |
| I SD | Shutdown Current | V EN = 0V | - | 0.1 | 1 | μA |
| I LIM | Peak Inductor Current | - | 3 | - | - | A |
| V SCP | Short-Circuit Protection Latch Off Threshold | - | - | 0.3 | - | V |
| f OSC | Oscillator Frequency | - | - | 1 | - | MHz |
| R DS(ON) | Drain to Source On-state Resistance | I LX = 100mA, high side | - | 110 | - | mΩ |
| R DS(ON) | Drain to Source On-state Resistance | I LX = 100mA, low side | - | 80 | - | mΩ |
| V ENH | EN High Threshold | - | 1.5 | - | - | V |
| V ENL | EN Low Threshold | - | - | - | 0.4 | V |
| I EN | EN Leakage Current | V IN = V EN = 5V | -1.0 | - | 1.0 | μA |
| V UVLO | Input UVLO Threshold | - | - | 2.4 | 2.7 | V |
| V HYS | UVLO Hysteresis | - | - | 0.2 | - | V |
| - | Maximum Duty Cycle | - | 100 | - | - | % |
| R DSCH | Output Discharge Switch On- Resistance | - | - | 50 | - | Ω |
| T OTP | Overtemperature Protection | - | - | +160 | - | ° C |
| T OTH | OTP Hysteresis | - | - | +30 | - | ° C |
| V IOVP | V IN Overvoltage Protection | - | - | 6.25 | - | V |
| V IHSY | IOVP Hysteresis | - | - | 0.25 | - | V |
| t SS | Soft-Start Time | - | - | 1.8 | - | ms |
AP3429 Typical Application
AP3429 Package Information
Please see http://www.diodes.com/package-outlines.html for the latest version.
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| AP3429/A | Diodes Incorporated | TSOT25 |
| AP3429A | Diodes Incorporated | TSOT25 |
| AP3429AKTR-G1 | Diodes Incorporated | TSOT25 |
| AP3429AKTTR-G1 | Diodes Incorporated | TSOT25 |
| AP3429KTTR-G1 | Diodes Incorporated | TSOT25 |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- LM2596 – onsemi, Step-Down Voltage Regulator
- TPS562200 – Texas Instruments, Synchronous Buck Converter
- MP1584EN – Monolithic Power Systems, Buck Converter
- MP2344GJ-Z – Monolithic Power Systems, Synchronous Step-Down Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Diodes datasheets (216)
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