DIODES INC. AP64501 Synchronous Buck Converter, 5A, HSOIC-8
High-efficiency synchronous buck regulator, 3.8-40V in, adjustable out, 5A, EMI-reducing FSS, HSOIC-8.
The AP64501SP-13 is a synchronous step-down (buck) regulator from Diodes Incorporated, engineered for high-efficiency DC-DC conversion. It fully integrates a 45mΩ high-side power MOSFET and a 20mΩ low-side power MOSFET to minimise power losses and achieve excellent efficiency, including up to 85% at light loads (5mA). The device employs peak current mode control to simplify the external component count, making it easy to design into a wide range of applications.
A proprietary gate driver scheme effectively reduces switching node ringing without compromising MOSFET turn-on and turn-off times, thereby lowering high-frequency radiated EMI. Additionally, the device features frequency spread spectrum (FSS) with a ±6% switching frequency jitter, further reducing EMI by spreading emitted energy across a frequency range. This makes the AP64501 an ideal choice for noise-sensitive designs.
The converter accepts a wide input voltage supply from 3.8V to 40V and provides an adjustable output voltage from 0.8V up to 40V (maximum 39V at +25°C). It includes robust protection features such as undervoltage lockout (UVLO), output overvoltage protection (OVP), cycle-by-cycle peak current limit, and thermal shutdown. The device also supports low-dropout (LDO) mode with a precision enable threshold to adjust the UVLO, enhancing design flexibility.
With a typical switching frequency of 570kHz, the AP64501 operates over an ambient temperature range of -40°C to +85°C and comes in an SO-8EP (HSOIC-8) surface-mount package. This regulator is suitable for a variety of applications, including 5V, 12V, and 24V distributed power buses, power tools, laser printers, white goods, home appliances, home audio, network systems, consumer electronics, and general point-of-load designs.
Specifications
- Topology: Synchronous Buck (Step-Down)
- Output Type: Adjustable
- 5V, 12V, and 24V distributed power bus supplies
- Power tools and laser printers
- White goods and small home appliances
- Home audio systems
- Topology: Synchronous Buck (Step Down)
- Output Type: Adjustable
- Number of Outputs: 1
- Input Voltage Min: 3.8V
- Input Voltage Max: 40V
- Output Current: 5A
- Max Output Current: 5A
- IC Case / Package: HSOIC (SO-8EP)
- Number of Pins: 8
- IC Mounting: Surface Mount
- Output Voltage Min: 800mV
- Output Voltage Max: 40V
- Switching Frequency: 570kHz
- Efficiency: Up to 85% at 5mA light load
- Operating Temperature Min: -40°C
- Operating Temperature Max: 85°C
- Special Feature: Proprietary gate driver for EMI reduction
- Special Feature: Frequency spread spectrum (FSS) ±6% jitter
- Protection: Undervoltage lockout (UVLO)
- Protection: Output overvoltage protection (OVP)
- Protection: Cycle-by-cycle peak current limit
- Protection: Thermal shutdown
- Special Feature: Low-dropout (LDO) mode
- Shutdown Supply Current: 1μA typ (VEN=0V, TJ=+25°C, VIN=12V)
- Weight: 0.02 grams
- Dimensions: 43mm x 33mm x 15mm
- of Pins: 8Pins
- Switching Frequency Typ: 570kHz
- SVHC: No SVHC (25-Jun-2025)
- DC / DC Converter IC Case: SOIC-EP
Documents
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