Diodes Incorporated AP7167-FNG-7

Overview

AP7167-FNG-7 from Diodes Incorporated is a 1.2A adjustable-output ultra-low dropout linear regulator with Power-OK (POK) monitoring, EN control, and thermal/current protection. It delivers 0.8V–5.0V output from 2.2V–5.5V input, achieves 230mV dropout at 500mA, consumes 125µA typical quiescent current, and operates across –40°C to +85°C ambient. It serves as a core power supply for FPGA I/O rails, smartphone baseband cores, and portable audio subsystems.

For engineers reviewing the AP7167-FNG-7 datasheet, AP7167-FNG-7 pinout, AP7167-FNG-7 application, or AP7167-FNG-7 equivalent, key selection criteria include dropout voltage at full load, POK threshold accuracy (±5% of VREF), FB reference stability (0.8V ±1.5%), thermal shutdown hysteresis (25°C), and compatibility with ≥4.7µF ceramic output capacitors without external compensation.

Technical Context

The AP7167 integrates a PMOS pass transistor, precision 0.8V bandgap reference, error amplifier, and open-drain POK comparator with 4% hysteresis. Its EN pin enables direct logic-level control (VIH = 1.4V min), while POK asserts high when output reaches 92% of target voltage and remains valid until falling below 87% - enabling reliable power sequencing in multi-rail systems.

Internal current limiting (1.2A min / 1.6A typ) and thermal shutdown (155°C trip, 130°C recovery) operate independently of external components. Stability is guaranteed with any ≥4.7µF output capacitor - including low-ESR ceramics - eliminating need for series resistance or specialized capacitor types.

Key Specifications

Pinout & Package

AP7167-FNG-7 uses the DFN3030-10 package (3.0mm × 3.0mm × 0.75mm, exposed thermal pad). Pin 1 is marked by top-side laser etch; pins are numbered counterclockwise from top-left corner. The exposed pad must be soldered to PCB ground plane for thermal performance (θJA = 40°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable LDO applications.

Compared with MCP1826T-ADJE/DC and TLS850F2BTV50, AP7167-FNG-7 uniquely combines adjustable output, POK signaling, and ultra-low dropout in a consumer-grade DFN package - making it optimal for space-constrained, battery-sensitive designs requiring precise power sequencing.

Availability

AP7167-FNG-7 is available at Aetrix Electronics and suitable for smartphone baseband power, FPGA I/O regulation, Bluetooth audio subsystems, and USB-C PD auxiliary rails requiring stable component supply across production volumes.

Supply support for AP7167-FNG-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 power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The AP7167 belongs to Diodes' high-performance LDO family targeting portable and battery-powered applications where ultra-low dropout, low quiescent current, and integrated power-good signaling are essential.

FAQ

What is the minimum output capacitance required for stability?

The AP7167-FNG-7 is stable with any output capacitor ≥4.7µF, regardless of type (ceramic, tantalum, or aluminum electrolytic) or ESR value. No external compensation or series resistance is needed. For best transient response, place the capacitor within 2mm of the OUT and GND pins using short, wide traces.

Can the POK pin drive a microcontroller interrupt directly?

Yes - the POK pin is an open-drain output rated for ≤4mA sink current and ≤5.5V voltage. Connect a pull-up resistor (e.g., 10kΩ to 3.3V) and route the signal to a GPIO with interrupt capability. POK asserts high when output reaches 92% of target voltage and deasserts at 87%, providing noise-immune sequencing feedback.

How does thermal shutdown behave under sustained overload?

When junction temperature reaches ~155°C, the AP7167-FNG-7 disables the pass element and holds output off until temperature falls to ~130°C. This hysteresis prevents rapid cycling. In a typical DFN3030-10 layout with 1-in² 2oz copper, shutdown occurs at ~1.0A load with 5.5V input - verify with actual board thermal simulation.

Is the FB pin compatible with standard resistor-divider networks?

Yes - the FB pin has 0.01µA max leakage and references an internal 0.8V bandgap. Use R2 ≤250kΩ to maintain reference stability; typical values are R1 = 100kΩ and R2 = 40kΩ for 2.8V output. Avoid placing FB traces near noisy signals, and keep the divider close to the IC to minimize parasitic pickup.