Diodes Incorporated AP7368D-10RS4-7

Overview

AP7368D-10RS4-7 from Diodes Incorporated is a 500mA/1A low-noise RF LDO regulator in X1-DFN1612-8 (Type B) package, delivering ±1% output voltage accuracy at 1.0V fixed output, 80dB PSRR at 1kHz, and 16µV_rms output noise (10Hz–100kHz). It supports dual current-limit selection (LCON pin), features enable control, thermal shutdown, and foldback short-circuit protection, and is optimized for RF supply rails in portable wireless devices.

For engineers reviewing the AP7368D-10RS4-7 datasheet, AP7368D-10RS4-7 pinout, AP7368D-10RS4-7 application, or AP7368D-10RS4-7 equivalent, key selection criteria include low-noise performance for sensitive RF stages, programmable current limit for power budgeting, tight output accuracy across temperature, and compact DFN packaging for space-constrained PCB layouts.

Technical Context

The AP7368D-10RS4-7 integrates a CMOS-based LDO architecture with a precision voltage reference, error amplifier, and current-limit circuitry. Its LCON pin selects between 500mA (logic low) and 1A (logic high) output current limits, while EN enables/disables regulation with defined logic thresholds (0–0.4V low, 1–5.5V high).

It delivers stable 1.0V output with dropout as low as 0.074V at 1.8V_OUT/500mA, achieves 80dB ripple rejection at 1kHz, and maintains ±1% V_OUT accuracy over −40°C to +85°C ambient. Thermal shutdown activates at +150°C with +20°C hysteresis, and internal foldback protection limits short-circuit current to 60mA when LCON = "L".

Key Specifications

Pinout & Package

X1-DFN1612-8 (Type B) package: 1.6mm × 1.2mm footprint, 0.4mm pitch, exposed thermal pad (EP) for enhanced heat dissipation. Recommended PCB layout uses large copper area connected to GND under EP.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with XC6210B102MR-G and RT9080AL-10GJ5, the AP7368D-10RS4-7 uniquely combines 16µV_rms noise, 80dB PSRR, dual-current-limit flexibility, and foldback protection in a 1.6mm × 1.2mm DFN-making it optimal for RF-sensitive, thermally constrained designs where both performance and configurability matter.

Availability

AP7368D-10RS4-7 is available at Aetrix Electronics and suitable for RF power amplifier bias, Wi-Fi transceiver core supply, and camera image sensor analog supply requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7368D-10RS4-7 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 analog ICs, specializing in high-performance power management, signal integrity, and timing solutions for consumer, industrial, and automotive markets.

The AP7368 series belongs to Diodes' RF-optimized LDO product line, designed specifically to meet stringent noise, PSRR, and transient response requirements of modern wireless communication systems.

FAQ

What is the function of the LCON pin on AP7368D-10RS4-7?

The LCON pin configures the device's output current limit: logic high (≥1V) sets 1A maximum, logic low (≤0.4V) sets 500mA maximum. This hardware-selectable feature eliminates software overhead and enables deterministic current limiting during startup or fault conditions without external components.

Can AP7368D-10RS4-7 be used with ceramic output capacitors smaller than 1µF?

Yes-the AP7368D-10RS4-7 is stable with 1µF ceramic output capacitors, but operation below this value is not characterized or guaranteed. Using <1µF may degrade transient response and stability margins, especially under large load steps; Diodes recommends ≥1µF X5R/X7R ceramics placed close to VOUT and GND pins.

Does AP7368D-10RS4-7 provide reverse current blocking?

No-the AP7368D-10RS4-7 does not integrate reverse current blocking. When disabled (EN = low), the internal pass FET remains off, preventing backfeed from VOUT to VDD, but no active reverse-blocking MOSFET is present. External diode or ideal diode IC is required if reverse current must be blocked during input loss.

What is the recommended PCB layout for thermal management of AP7368D-10RS4-7?

Maximize copper area under the exposed pad (EP) and connect it directly to a solid GND plane using ≥4 thermal vias (0.3mm diameter, spaced ≤1mm apart). Route wide traces (≥0.5mm) for VDD and VOUT, minimize loop area between CIN/COUT and GND, and avoid routing noisy signals beneath the IC or its decoupling caps.