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AP64303Q

3.8V to 40V Input Automotive Grade, 3A Low IQ Synchronous Buck Converter

Evaluation Board User Guides

DDB103R3-User-Guide.pdf (512 KB)

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Description

The AP64303Q is an adjustable switching frequency internal compensated synchronous DC-DC buck converter with a default internal frequency of 500kHz. The device fully integrates a 120mΩ high-side power MOSFET and a 55mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP64303Q enables a continuous load current of up to 3A with efficiency as high as 95% in enhanced biased.

The AP64303Q features current mode control operation, which enables easy loop stabilization supporting a wide range of output capacitive loads.

The AP64303Q simplifies board layout and reduces space requirements with its high level of integration and minimal need for external components, making it ideal for distributed power architectures.

The AP64303Q is available in a standard Green U-QFN4040-16/SWP (Type UXB) package.

Feature(s)

Qualified for Automotive Applications
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
V_IN8V to 40V
3A Continuous Output Current
V_OUT Adjustable from 0.8V to 36V
Enhanced Efficiency Mode with Bias
Adjustable Switching Frequency; 500kHz Default Frequency
Startup with Pre-Biased Output
External Soft-Start with Tracking – Sequential, Ratiometric, or Absolute; Default Internal Soft-Start of 1.7ms
Enable Pin with 5% Tolerance
Soft Discharge
±5% Power Good Detection with Internal Pullup Resistor
Overcurrent Protection (OCP) with Hiccup
Thermal Protection
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
The AP64303Q 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)

General-purpose point-of-load DC-DC power conversion
Automotive infotainment
Telecommunication systems
Distributed power systems
Home audio devices
Consumer electronics
Network systems
FPGA, DSP and ASIC supplies
Green electronics

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP)	Automotive
Type	Buck
Minimum Input Voltage (V)	3.8
Maximum Input Voltage (V)	40
Output Current (A)	3
Minimum Output Voltage (V)	0.8
Maximum Output Voltage (V)	36
Quiescent Current Typ (µA)	43
Shutdown Current Typ (µA)	2.2
Frequency Typ (kHz)	300/500/2500
HS RDS(ON) (mΩ)	120
LS RDS(ON) (mΩ)	55
Features	Enhanced Efficiency Mode with Bias Adjustable Switching Frequency. 500kHz Default Frequency Start-up with Pre-biased Output External Soft-Start with Tracking – Sequential, Ratiometric, or Absolute. Default Internal Soft-Start of 1.7ms Enable Pin with 5% to