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AP64502

3.8V TO 40V INPUT, 5A LOW IQ SYNCHRONOUS BUCK WITH INTERNAL COMPENSATION

Datasheet

Evaluation Boards and User Guides

AP64502SP-EVM-User-Guide.pdf (674 KB)

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Description

The AP64502 is a 5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 45mΩ high-side power MOSFET and a 20mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP64502 device is easily used by minimizing the external component count due to its adoption of peak current mode control along with its integrated loop compensation network.

The AP64502 design is optimized for Electromagnetic Interference (EMI) reduction. The device 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 AP64502 also features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time.

The device is available in an SO-8EP package.

Feature(s)

VIN: 3.8V to 40V
Output Voltage (VOUT): 0.8V to VIN
5A Continuous Output Current
0.8V ± 1% Reference Voltage
25µA Low Quiescent Current (Pulse Frequency Modulation)
Adjustable Switching Frequency: 100kHz to 2.2MHz
External Clock Synchronization: 100kHz to 2.2MHz
Adjustable Soft-Start Time
Up to 85% Efficiency at 5mA Light Load
Proprietary Gate Driver Design for Best EMI Reduction
Frequency Spread Spectrum (FSS) to Reduce EMI
Low-Dropout (LDO) Mode
Precision Enable Threshold to Adjust UVLO
Protection Circuitry
- Undervoltage Lockout (UVLO)
- Output Overvoltage Protection (OVP)
- Cycle-by-Cycle Peak Current Limit
- Thermal Shutdown
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device
For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

Distributed Power Bus Supplies
Power Tools and Laser Printers
White Goods and Small Home Appliances
Home Audio
Network Systems
Consumer Electronics
General Purpose Point of Load

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP)	Standard
Type	Buck
Minimum Input Voltage (V)	3.8
Maximum Input Voltage (V)	40
Output Current (A)	5
Minimum Output Voltage (V)	0.8
Maximum Output Voltage (V)	VIN
Quiescent Current Typ (µA)	25
Shutdown Current Typ (µA)	1
Frequency Typ (kHz)	100 to 2200
HS RDS(ON) (mΩ)	45
LS RDS(ON) (mΩ)	20
Features	Enable, Light Load Efficiency, Soft-start Adjustable, Frequency Adjustable, External Clock Synchronization, Internal Loop Compensation, UVLO Adjustable, Frequency Spread Spectrum, OVP, Overcurrent Protection, Thermal Shutdown, Synchronous Rectification