Diodes Incorporated AP7362-18SP-13

Overview

AP7362-18SP-13 from Diodes Incorporated is a 1.5A fixed-output (1.8V) ultra-low dropout linear regulator in SO-8EP package, featuring 190mV dropout at full load, ±3% output voltage accuracy over line/load/temperature, and integrated enable control. It delivers stable power to FPGA I/O rails and ASIC cores in routers and STBs with 0.5mA quiescent current and fast transient response.

For engineers reviewing the AP7362-18SP-13 datasheet, AP7362-18SP-13 pinout, AP7362-18SP-13 application, or AP7362-18SP-13 equivalent, key selection criteria include dropout voltage at 1.5A, thermal shutdown threshold (+170°C), EN logic thresholds (VIH ≥ 1.4V, VIL ≤ 0.65V), and stability with any 10µF capacitor type.

Technical Context

The AP7362-18SP-13 integrates a PMOS pass element, band-gap reference (0.605V nominal), error amplifier, and internal compensation enabling unconditional stability with ceramic, tantalum, or electrolytic output capacitors. Its feedback network is internally configured for 1.8V output, eliminating external resistors.

Enable functionality uses active-high logic with 25µs turn-on/off delay; ground pin current remains ≤1.3mA across 0–1.5A load and −40°C to +85°C ambient. Thermal shutdown activates at +170°C with +10°C hysteresis, and short-circuit protection limits peak output current to 3.7A.

Key Specifications

Pinout & Package

AP7362-18SP-13 is housed in an SO-8EP (exposed pad) thermally enhanced package. The exposed pad must be soldered to a PCB copper pour connected to GND for optimal thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO applications.

Compared with MCP1703T-1802E/MB and XC6210B182MR-G, AP7362-18SP-13 uniquely combines 1.5A capability, 190mV dropout, EN control, thermal shutdown, and SO-8EP thermal performance - making it the only viable option for high-current, safety-critical 1.8V point-of-load regulation.

Availability

AP7362-18SP-13 is available at Aetrix Electronics and suitable for FPGA I/O power supplies, ASIC core regulation in networking equipment, and HDMI PHY biasing requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP7362-18SP-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 power management, signal integrity, and connectivity applications.

The AP7362 belongs to Diodes' high-performance LDO family designed specifically for low-voltage, high-current point-of-load regulation in computing, networking, and consumer electronics where ultra-low dropout and fast transient response are essential.

FAQ

What is the minimum input voltage required for AP7362-18SP-13 to regulate 1.8V at 1.5A?

The minimum input voltage is determined by dropout: VIN(MIN) = VOUT + VDROPOUT = 1.8V + 0.19V = 1.99V. However, per Recommended Operating Conditions, VIN must be ≥2.2V to guarantee specification compliance across temperature and process variation. Below 2.2V, regulation may degrade or fail under worst-case conditions.

Can AP7362-18SP-13 operate without an output capacitor?

No. An output capacitor is mandatory for stability and transient response. The datasheet specifies stability with ≥10µF of any capacitor type (ceramic, tantalum, or electrolytic). Omitting COUT causes oscillation and potential device failure due to lack of phase margin compensation.

Is the exposed pad (EP) of the SO-8EP package electrically connected to GND?

Yes. The exposed pad is internally connected to the silicon die substrate and must be soldered to a PCB copper area tied to GND. It serves both thermal conduction (θJA = 52.8°C/W) and electrical grounding - but cannot be the sole GND connection; Pin 1 must also be routed to the same ground plane.

Does AP7362-18SP-13 require a minimum load current to maintain regulation?

No. The device remains stable and regulated down to zero load current. This is confirmed in the Application Information section: "No minimum load is required to keep the device stable. The device will remain stable and regulated in no load condition." This enables use in standby modes where downstream circuitry is powered off.