Diodes Incorporated AP7165-FNG-7

Overview

AP7165-FNG-7 from Diodes Incorporated is a 600mA adjustable-output ultra-low dropout linear regulator with Power-OK (POK) monitoring, EN control, ±2.5% total output accuracy over line/load/temperature, 300mV dropout at 500mA, and 125µA typical quiescent current. It operates from 2.2V–5.5V input and supports 0.8V–5.0V output via external resistor divider, targeting power sequencing in portable electronics and FPGA/DSP core supplies.

For engineers reviewing the AP7165-FNG-7 datasheet, AP7165-FNG-7 pinout, AP7165-FNG-7 application, or AP7165-FNG-7 equivalent, key selection criteria include dropout voltage at full load, POK threshold hysteresis (4% V_REF), thermal shutdown behavior (150°C trip, 125°C recovery), and stability with ≥4.7µF ceramic output capacitance without minimum load requirement.

Technical Context

The AP7165 integrates a PMOS pass element, band-gap reference (0.8V), error amplifier, and open-drain POK comparator with 87–97% V_REF rising threshold and 4% hysteresis. Its EN pin enables active-high logic control with 1.4V VIH and 0.4V VIL thresholds, while internal current limiting (600mA min) and thermal shutdown (150°C) operate independently of external components.

Designed for low-noise, fast-transient applications, it delivers 60dB PSRR at 1kHz and exhibits <170µs start-up time from EN high to POK assertion at 100mA load. The regulator remains stable across -40°C to +85°C ambient with no minimum load, supporting both U-DFN3030-10 and SO-8EP packages featuring exposed thermal pads.

Key Specifications

Pinout & Package

AP7165-FNG-7 is packaged in U-DFN3030-10 (3.0mm × 3.0mm, 0.6mm height) with exposed thermal pad. Pin assignments are validated per Diodes DS31270 Rev. 7-2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1826T-ADJE/DC and TLS850F2BTV50, AP7165-FNG-7 uniquely combines 600mA capability, 300mV dropout, POK signaling, and 125µA IQ in a green RoHS-compliant DFN package-making it optimal for space-constrained, battery-sensitive consumer electronics requiring precise power sequencing.

Availability

AP7165-FNG-7 is available at Aetrix Electronics and suitable for mobile device power management, FPGA core supply, Bluetooth audio systems, and DSP-based audio codec applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for AP7165-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 high-reliability power management, signal integrity, and protection solutions for consumer, industrial, and computing markets.

The AP7165 belongs to Diodes' precision LDO regulator product line, engineered specifically for portable electronics requiring ultra-low IQ, tight output accuracy, and integrated power-good signaling in miniature packages.

FAQ

What is the minimum output capacitor required for stability?

The AP7165-FNG-7 is stable with any output capacitor ≥4.7µF, regardless of type (ceramic, tantalum, or electrolytic). Unlike many LDOs, it does not require a minimum ESR or specific capacitor chemistry. Ceramic capacitors are preferred for low-profile designs and fast transient response, and multiple parallel capacitors are supported without instability risk.

How does the POK pin behave during startup and fault conditions?

The POK pin asserts high (open-drain pulled up externally) when output voltage reaches 92% of the target (e.g., 1.104V for 1.2V output) and remains high until voltage drops below 88% (4% hysteresis). During startup, POK rises within 170µs of EN going high at 100mA load. Under overcurrent or thermal shutdown, POK deasserts immediately, providing real-time fault indication to the host controller.

Can the AP7165-FNG-7 be used without an external feedback resistor divider?

No - the AP7165-FNG-7 is exclusively adjustable; it has no internal feedback network. A resistor divider connecting OUT→R1→FB→R2→GND is mandatory to set output voltage using V_OUT = 0.8V × (1 + R1/R2). R2 must be ≤250kΩ to maintain reference stability, and no fixed-output variant exists for this part number.

What thermal design considerations apply to the U-DFN3030-10 package?

The U-DFN3030-10 package uses an exposed thermal pad as the primary heat path. For reliable operation at 600mA, Diodes specifies θ_JA = 40°C/W on a 2-layer FR-4 board with 6 vias to a 1.0"×1.5" ground plane. To avoid thermal shutdown, the copper area under the pad must match Diodes' AP02001 layout (2.6mm × 2.6mm), and ambient temperature must stay ≤85°C under worst-case power dissipation: P_D = (V_IN − V_OUT) × I_OUT.