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AP3401

1.5MHZ, 1A STEP-DOWN DC-DC BUCK CONVERTER

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Description

The AP3401 is a 1A 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 AP3401 supports a range of input voltages from 2.5V 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 AP3401 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 AP3401 delivers 1A maximum output current while consuming only 40μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AP3401 an ideal choice for high output voltage, high current applications which require a low dropout threshold.

The AP3401 is available in TSOT26, U-DFN2020-6 packages.

Application(s)

  • Notebook PCs
  • TVs
  • Set-top-boxes
  • Networking Equipment

Feature(s)

  • Output Current: Up to 1A
  • Output Voltage: 0.6V to VIN
  • Input Voltage: 2.5V to 5.5V
  • 0.6V Reference Voltage With ±2% Precision
  • 40μA (Typ) No Load Quiescent Current
  • Shutdown Current: <1μA
  • 100% Duty Cycle Operation
  • 1.5MHz Switching Frequency
  • Internal Soft Start
  • No External Compensation Required
  • Current Limit Protection
  • Thermal Shutdown
  • TSOT26, U-DFN2020-6 Packages

Product Specifications

Product Parameters

Type Buck
Efficiency (%) 95 %
HS RDS(ON) (mΩ) 250 mΩ
LS RDS(ON) (mΩ) 170 mΩ
Frequency Typ (Hz) 1500 kHz
MinimumInput Voltage (V) 2.5 V
MaximumInput Voltage (V) 5.5 V
Output Current (mA) 1 A
Output Voltage (V) 0.6 to VIN V
Quiescent Current Typ (μA) 0.04 mA
Shutdown Current Typ (µA) 0.1 µA

Related Content

Packages

Technical Documents

Evaluation Board User Guides

Recommended Soldering Techniques

TN1.pdf

Orderable Part Number Buy from Distributor / Contact Sales Request Samples
AP3401DNTR-G1

AP3401DNTR-G1

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 603 10/25/2021 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample
AP3401KTTR-G1

AP3401KTTR-G1

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet EU 9000 10/25/2021 Germany Buy Now
Arrow Electronics Central EU 3000 10/25/2021 Europe Buy Now
Digi-Key Electronics 1000 10/25/2021 Europe, Asia, North America Buy Now
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PCNs

Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site
PCN-2480 2020-10-21 2021-01-21 Additional Qualified (AT) Assembly Test Site SIMAT