Diodes Incorporated

AP61406Q Synchronous Buck Converter

The Diodes Incorporated AP61406Q synchronous buck converter provides increased robustness in automotive POL applications

Image of Diodes AP61406Q Synchronous Buck ConverterThe Diodes Incorporated AP61406Q 5.5 V, 4 A, automotive-compliant synchronous buck converter provides a versatile high power density automotive POL solution. Its I2C interface allows for low quiescent current (IQ) and the programming of various parameters, enabling the device to meet the growing demands for compact designs and high efficiency in automotive point-of-load (POL) applications. The device features an I2C-compatible, two-wire serial interface consisting of a bidirectional serial-data line (SDA) and a serial-clock line (SCL) with supported rates up to 3.4 MHz.

The AP61406Q operates with an input voltage range of 2.3 V to 5.5 V. It integrates a 75 mΩ high-side and a 33 mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion. Its adoption of constant on-time (COT) control minimizes external component count, facilitates loop stabilization, and results in a low output voltage ripple. For high power density, the AP61406Q is available in the tiny W-QFN1520-8/SWP (Type UX) package. A standard-compliance version, AP61406, is available and suitable for industrial and commercial applications.

Features
  • I2C interface with up to 3.4 MHz SCL clock rates to program PFM/PWM, fSW (1 MHz, 1.5 MHz, 2 MHz, 2.5 MHz), IOUT (1 A/2 A/3 A/4 A), VOUT (20 mV steps), and fault status reporting
    • Provides increased versatility and ease of design
  • Operates at 4 A maximum output current in the tiny W-QFN1520-8/SWP (Type UX)
    • Provides high power density for high ambient temperature operation in automotive POL applications
  • Accurate PG with ±5% window comparator and internal 5 MΩ pull-up
    • Accurate fault detection while reducing BOM costs
  • Multi-function EN controls PFM/PWM modes of operation
    • Provides flexibility for low IQ high-light-load efficiency or equal ripple across load conditions in fixed PWM
  • High-side and low-side current sense protection during output short
    • Increases robustness in automotive POL applications
Applications
  • Infotainment
  • Instrument clusters
  • Telematics
  • Advanced driver assistance systems (ADAS)

AP61406Q Synchronous Buck Converter

ObrázekObjednací číslo výrobcePopisAvailable QuantityCenaZobrazit podrobnosti
DCDC CONV LV BUCK W-QFN1520-8/SWAP61406QFCBW8-7DCDC CONV LV BUCK W-QFN1520-8/SW2990 - Immediate
12000 - Factory Stock		$7.16Zobrazit podrobnosti
Published: 2025-12-09