AP61406Q

Description

The AP61406Q is a selectable up to 4A, synchronous buck converter with an input voltage range of 2.3V to 5.5V and fully integrates a 75mΩ high-side power MOSFET and a 33mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion.

The AP61406Q is easily used by minimizing the external component count due to its adoption of constant on-time (COT) control to achieve fast transient responses, ease loop stabilization, and low output voltage ripple.

The AP61406Q has optimized designs for small form factor. The series offers various fixed output voltage and an adjustable output voltage version. It also has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces high-frequency radiated EMI noise caused by MOSFET switching.

The AP61406Q features I2C compatible, 2-wires serial interface consisting of a bi-directional serial-data line, SDA, and a serial-clock line, SCL. It supports SCL clock rates up to 3.4MHz.

The device is available in a W-QFN1520-8/SWP (Type UX) package.

Feature(s)

• AEC-Q100 Qualified with the Following Results
  • Device Temperature Grade 1: -40°C to +125°C T_A
  • Device HBM ESD Classification Level H1C
  • Device CDM ESD Classification Level C3B
• Functional Safety-Capable – Documentation Available to Aid Functional Safety System Design
• Wettable Flange
• VIN 2.3V to 5.5V
• Wide Output Voltage Range: 0.300V to 3.600V
• 0.5V ± 2% Reference Voltage (Default Setting)
• 20µA Ultra-Low Quiescent Current (Pulse-Frequency Modulation)
• I2C Interface up to 3.4MHz SCL Clock Rates
  • Programmable Mode – PFM/PWM
  • Programmable Frequency – 1MHz, 1.5MHz, 2MHz, 2.5MHz
  • Programmable IOUT – 1A/2A/3A/4A
  • 20mV Increment VOUT Adjust
• Power-Good Indicator
  • Protection Circuitry
  • Undervoltage Lockout (UVLO)
  • VIN Overvoltage Protection (OVP)
  • Peak and Valley Current Limit
  • Thermal Shutdown
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• The AP61406Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Application(s)

• Automotive power systems
• Automotive infotainment
• Automotive instrument clusters
• Automotive telematics
• Advanced driver assistance systems