Diodes Incorporated AP64200SP-13

Overview

AP64200SP-13 from Diodes Incorporated is a 2A synchronous buck DC-DC converter with 3.8V–40V input range, integrated 150mΩ high-side and 80mΩ low-side MOSFETs, adjustable 100kHz–2.2MHz switching frequency, 0.8V ±1% reference, and 25μA quiescent current in PFM mode. It delivers regulated 0.8V–VIN output for point-of-load conversion in industrial power tools and network systems.

For engineers reviewing the AP64200SP-13 datasheet, AP64200SP-13 pinout, AP64200SP-13 application, or AP64200SP-13 equivalent, key selection criteria include EMI-reduction features (ringing-free gate drive + ±6% FSS), precision enable threshold (1.18V), thermal shutdown at +160°C, and SO-8EP package compatibility with PCB thermal pad grounding.

Technical Context

The AP64200SP-13 uses fixed-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its proprietary multi-level gate driver suppresses SW node ringing without degrading rise/fall times, directly reducing high-frequency radiated EMI.

It supports dual frequency control: resistor-programmed (RT/CLK to GND) or external clock synchronization (100kHz–2.2MHz via PLL lock). The error amplifier compares FB voltage against a 0.8V reference, generating COMP voltage to regulate output by modulating high-side MOSFET on-time.

Key Specifications

Pinout & Package

AP64200SP-13 is housed in an SO-8EP (Standard) package with exposed thermal pad (Pin 9) requiring direct connection to PCB ground plane for thermal performance (θJA = 45°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP2451DT-LF-Z and TPS54202HDDCR, the AP64200SP-13 uniquely combines 40V tolerance, integrated EMI mitigation (ringing-free + FSS), and SO-8EP thermal performance-making it optimal for industrial 24V/36V systems requiring certified EMC and long-term reliability.

Availability

AP64200SP-13 is available at Aetrix Electronics and suitable for distributed power bus supplies, power tools and laser printers, and white goods and small home appliances requiring stable component supply, full traceability, and long-lifecycle support.

Supply support for AP64200SP-13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, computing, consumer, and communications markets.

The AP64200SP-13 belongs to Diodes' high-voltage synchronous buck converter product line, engineered for EMI-sensitive industrial and appliance applications demanding wide VIN range, low IQ, and robust protection.

FAQ

What is the minimum recommended input voltage for reliable startup?

The AP64200SP-13 has a rising VIN undervoltage lockout (UVLO) threshold of 3.5V typical (3.7V max). Reliable startup occurs when VIN exceeds 3.7V, and the device remains enabled until VIN falls below 3.1V (falling threshold). This 0.6V hysteresis prevents oscillation near the trip point.

Can the AP64200SP-13 operate with an external clock source?

Yes. The RT/CLK pin accepts an external square-wave clock from 100kHz to 2.2MHz. When an external signal is applied, the internal oscillator synchronizes via PLL; if the clock stops, the device automatically reverts to resistor-programmed frequency. No additional components are needed beyond AC-coupling if DC offset exists.

How is thermal performance affected if the exposed pad is not soldered to ground?

Leaving the exposed pad (Pin 9) unconnected or improperly soldered increases θJA from 45°C/W to >100°C/W, causing junction temperature to exceed +125°C at full 2A load. Diodes specifies mandatory electrical and thermal connection to the PCB ground plane using ≥4 thermal vias and full-pad solder coverage for rated performance.

Does the AP64200SP-13 support output voltages below 0.8V?

No. The internal reference is fixed at 0.8V ±1%, and the FB pin is designed for resistive divider feedback only. Output voltage is calculated as VOUT = 0.8V × (1 + R1/R2), so the minimum achievable VOUT is 0.8V (when R2 is open or R1 = 0). Lower outputs require external reference or different topology.