Diodes Incorporated AP64200QSP-13

Overview

AP64200QSP-13 from Diodes Incorporated is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering 2A continuous output with 3.8V–40V input range, 0.8V reference accuracy (±1%), adjustable 100kHz–2.2MHz switching frequency, and integrated 150mΩ/80mΩ MOSFETs. It enables compact, EMI-optimized power supplies in automotive instrument clusters and telematics systems.

For engineers reviewing the AP64200QSP-13 datasheet, AP64200QSP-13 pinout, AP64200QSP-13 application, or AP64200QSP-13 equivalent, key selection criteria include its spread-spectrum EMI reduction, precision enable threshold (1.18V), cycle-by-cycle OCP, thermal shutdown at +160°C, and SO-8EP package compatibility with automotive thermal requirements.

Technical Context

The AP64200QSP-13 uses peak current mode control with internal slope compensation to ensure stability at duty cycles >50%, and integrates a proprietary multi-level gate driver that suppresses SW node ringing without degrading rise/fall times. Its PLL-based RT/CLK pin supports both resistor-set timing (100kHz–2.2MHz) and external clock synchronization within the same frequency range.

It operates in forced PWM under heavy load and transitions to PFM at light load (≤5mA), achieving 88% efficiency and 25μA quiescent current. Protection includes undervoltage lockout (3.1V falling / 3.7V rising), output overvoltage protection at 0.88V FB threshold, and thermal shutdown with 25°C hysteresis.

Key Specifications

Pinout & Package

AP64200QSP-13 is housed in an SO-8EP (exposed pad) package with 9 terminals: 8 perimeter pins plus an exposed thermal pad electrically tied to GND for enhanced thermal dissipation (θJC = 5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4420AGL-AEC1-P and TPS54240QDGQRQ1, the AP64200QSP-13 uniquely combines full MOSFET integration, ±6% FSS, and a 1.18V precision enable threshold-enabling smaller footprint, lower EMI filter cost, and tighter power-rail sequencing in automotive ECUs.

Availability

AP64200QSP-13 is available at Aetrix Electronics and suitable for automotive instrument clusters, telematics gateways, and ADAS domain controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for AP64200QSP-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 manufacturer of discrete semiconductors and ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The AP64200QSP-13 belongs to Diodes' AEC-Q100-compliant automotive power portfolio, engineered specifically for demanding vehicle subsystems where EMI compliance, thermal resilience, and functional safety readiness are mandatory.

FAQ

What is the minimum input voltage required for AP64200QSP-13 to start switching?

The AP64200QSP-13 has a power-on reset (POR) threshold of 3.5V (typical) and an undervoltage lockout (UVLO) falling threshold of 3.1V. It begins switching once VIN rises above 3.5V and remains enabled until VIN drops below 3.1V. The EN pin can be used to raise this effective UVLO threshold via an external resistor divider.

Can AP64200QSP-13 operate in 100% duty cycle mode?

Yes - the AP64200QSP-13 supports 100% duty cycle operation in low-dropout (LDO) mode when the input voltage approaches the regulated output voltage. This is enabled automatically when the internal control loop commands maximum on-time, allowing uninterrupted power delivery during brown-out conditions.

How does the Frequency Spread Spectrum (FSS) function impact EMC testing?

FSS introduces ±6% jitter to the switching frequency, spreading radiated energy over a wider bandwidth and reducing peak emissions by up to 10dB. This directly improves pass margin in CISPR 25 radiated emissions tests, particularly in the 30–108MHz and 216–1000MHz bands common in automotive EMC validation.

Is the exposed thermal pad of AP64200QSP-13 required to be connected to GND?

Yes - the exposed pad is electrically connected to the internal GND and must be soldered to a PCB ground plane. Failure to do so increases junction-to-ambient thermal resistance (θJA) from 45°C/W to >80°C/W, risking thermal shutdown under 2A load at elevated ambient temperatures.