Diodes Incorporated AP64102SP-13

Overview

AP64102SP-13 from Diodes Incorporated is a 1A synchronous buck DC-DC converter with 3.8V–40V input range, integrated 150mΩ high-side and 80mΩ low-side MOSFETs, 0.8V ±1% reference, 25μA quiescent current in PFM mode, and SO-8EP package. It delivers regulated output for industrial power tools, home audio systems, and network equipment where wide VIN and EMI robustness are critical.

For engineers reviewing the AP64102SP-13 datasheet, AP64102SP-13 pinout, AP64102SP-13 application, or AP64102SP-13 equivalent, key selection factors include adjustable 100kHz–2.2MHz switching frequency, Frequency Spread Spectrum (±6% jitter), proprietary ringing-free gate driver, precision enable threshold (1.18V), and integrated loop compensation eliminating external compensation components.

Technical Context

The AP64102 employs fixed-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its COMP node voltage is generated by comparing FB voltage against a 0.8V reference, directly regulating average inductor current to match load demand.

EMI mitigation combines two hardware-level techniques: a multi-level gate driver that suppresses SW node ringing without degrading edge rates, and Frequency Spread Spectrum (FSS) with ±6% switching frequency jitter to disperse spectral energy across a wider band-both confirmed in typical performance curves and functional block diagram.

Key Specifications

Pinout & Package

AP64102SP-13 is housed in an SO-8EP (exposed pad) thermally enhanced package with 9 terminals (8 pins + exposed thermal pad). The exposed pad must be soldered to PCB ground plane for thermal management and electrical stability.

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 TPS54202DRCT, the AP64102SP-13 uniquely combines 40V input capability, integrated compensation, FSS, and ringing-free switching-making it the only choice for compact, certified EMI designs in wide-input industrial applications.

Availability

AP64102SP-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 across extended temperature and voltage ranges.

Supply support for AP64102SP-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 devices, with design centers across Asia, Europe, and the US.

The AP64102 belongs to Diodes' high-voltage synchronous buck converter product line, engineered specifically for EMI-sensitive industrial and consumer applications demanding wide input range, low IQ, and minimal external components.

FAQ

What is the minimum input voltage required for AP64102SP-13 startup?

The AP64102SP-13 has a rising-edge power-on reset (POR) threshold of 3.5V to 3.7V. Startup occurs reliably once VIN exceeds 3.7V. Below 3.1V, undervoltage lockout (UVLO) disables the device. The EN pin can be used to raise this threshold via an external resistor divider, enabling customized brownout protection.

Can AP64102SP-13 synchronize to an external clock, and what is the valid frequency range?

Yes, AP64102SP-13 accepts external clock signals on the RT/CLK pin across 100kHz to 2.2MHz. The internal PLL locks to the incoming clock; if the external signal stops, the device automatically reverts to resistor-set frequency. Clock edges must meet TTL-compatible voltage thresholds and have ≤10ns jitter for stable synchronization.

How does the AP64102SP-13 achieve 88% efficiency at 5mA load?

At light loads, AP64102SP-13 enters Pulse Frequency Modulation (PFM) mode, reducing switching frequency and disabling unnecessary circuitry. Combined with 25μA quiescent current and zero-cross detection that turns off the low-side MOSFET when inductor current reaches 60mA, it minimizes switching and conduction losses-yielding 88% efficiency at 5mA per Figure 2.

Is the exposed thermal pad of AP64102SP-13 electrically connected to GND?

Yes, the exposed pad is internally tied to GND and must be soldered to the PCB ground plane. It serves both thermal dissipation (θJC = 5°C/W) and electrical grounding. Failure to connect it results in elevated junction temperature, potential thermal shutdown, and degraded EMI performance due to compromised return path integrity.