Diodes Incorporated — Analog and discrete power solutions
U QFN4040 16 SWP

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U-QFN4040-16-SWP.png
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AL8890

60V Synchronous Buck

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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) package.

Feature(s)

  • VIN 3.8V to 60V

  • Wide VOUT Range: 0.8V to near 100% of VIN
  • VOUT 1% Accuracy
  • VFB 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 system

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Topologies (Charge Pump) No
Minimum Input Voltage (V) 3.8
Maximum Input Voltage (V) 60
Maximum Output Voltage (V) 59
Maximum LED Current (A) 3.5
LED Current Accuracy (%) NA
Switching Frequency Maximum (kHz) 2500
Dimming (PWM) NA
Dimming (Analog) Yes
Efficiency (%) 95
Operating Temperature Range (°C) -40 to 105
Sense/Feedback Voltage (mV) 800
Quiescent Current Typ (mA) 0.043
AEC-Q100 Grade 1

Related Content

Packages

Technical Documents

Recommended Soldering Techniques

TN1.pdf