AL88902

Description

The AL8890/AL88902 is a synchronous buck converter with internal compensation and switching frequency adjustable up to 2.5MHz. The device integrates a 120mΩ high-side power MOSFET and a 55mΩ low-side power MOSFET to provide high-efficiency DC-DC conversion.

The AL8890 enables a continuous load current of up to 3.5A (the AL88902 up to 2.5A) with efficiency as high as 95% in enhanced biased. The device features current-mode control operation, which enables easy loop stabilization supporting a wide range of output loading, suitable for both CV (constant voltage) and CC (constant current) applications.

The AL8890/AL88902 simplifies board layout and reduces space requirements with its high switching frequency and use of smaller size inductor and built-in MOSFET, making it ideal for power management.

The AL8890/AL88902 is available in wettable flank U-QFN4040- 16/SWP (Type UXB) and TSSOP-16EP packages.

Feature(s)

• V_IN8V to 60V
• Wide V_OUT Range: 0.8V to Near 100% of V_IN
• V_OUT 1% Accuracy
• V_FB Adjustable Through SS/TR Pin
• Synchronous Rectification > 95% Efficiency @12V
  • High-Side (120mΩ) Power MOSFET
  • Low-Side (55mΩ) Power MOSFET
• Low Quiescent Current 43μA
• Switching Frequency 300kHz to 2.5MHz
• Force PWM or PFM Mode Through MYSNC
• Synchronization to External Clock
• Programmable Startup Control
  • Startup with Pre-Biased Output
  • External Soft-Start with Tracking
  • High-Voltage Enable Pin with High Precision
• Protection and Diagnosis Functions
  • Power-Good (PG) Detection
  • Thermal Shutdown Protection
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
• An automotive-compliant part is available under separate datasheet (AL8890Q/AL88902Q)

Application(s)

• LED lighting systems
• Telecommunications
• White appliances
• Network systems