Diodes Incorporated AP7176BSP-13

Overview

AP7176BSP-13 from Diodes Incorporated is a 3.0A ultra-low-dropout linear regulator with dual supply inputs (VIN and VCNTL), enable input, power-good output, and ±1.5% output voltage accuracy over load/line/temperature. It delivers 1.2V at 3A for FPGAs and DSPs with sequencing-critical power rails, featuring 0.30V dropout at 1.2V output and internal soft-start.

For engineers reviewing the AP7176BSP-13 datasheet, AP7176BSP-13 pinout, AP7176BSP-13 application, or AP7176BSP-13 equivalent, this page provides verified pin functions, thermal resistance values (θJA = 70°C/W), PG delay timing (1–4 ms), current-limit thresholds (4.5–6.7A), and SO-8EP package layout guidance for stable high-current LDO implementation.

Technical Context

The AP7176B employs a precision 0.8V reference and error amplifier to regulate output via external resistor divider on FB, supporting adjustable VOUT from 0.8V to VIN – VDROP. Its dual-supply architecture isolates control logic (VCNTL) from power path (VIN), enabling sub-0.35V dropout while minimizing junction temperature rise.

Power-on reset monitors both VCNTL (2.5–2.95V threshold) and VIN (0.8–1.0V threshold) independently; thermal shutdown activates at +170°C with +50°C hysteresis. The open-drain PG output asserts low during undervoltage, thermal fault, or startup delay - debounced with 10µs filtering and 1–4 ms delay after VFB reaches 90% of target.

Key Specifications

Pinout & Package

AP7176BSP-13 uses the SO-8EP package (4.9mm × 3.9mm × 1.45mm) with exposed thermal pad connected to GND, delivering θJA = 70°C/W and θJC = 30°C/W on standard 2"×2" FR-4 PCB with thermal vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-dropout linear regulator applications.

Compared with TPS7A8300RGRT and MCP1826T-1202E/DC, the AP7176BSP-13 uniquely combines 3A current, dual-supply operation, ±1.5% accuracy, and programmable PG delay - making it irreplaceable in high-reliability, multi-rail embedded systems requiring precise power sequencing.

Availability

AP7176BSP-13 is available at Aetrix Electronics and suitable for notebook power delivery, FPGA core regulation, and industrial PLC I/O modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for AP7176BSP-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 analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for computing, industrial, and automotive markets.

The AP7176B belongs to Diodes' high-current LDO product line, engineered specifically for FPGA, DSP, and memory VTT applications demanding ultra-low dropout, tight accuracy, and robust sequencing capability in thermally constrained environments.

FAQ

What is the minimum recommended output capacitance for AP7176BSP-13 at 3A load?

The datasheet specifies 8µF minimum COUT for 3A load at 25% nominal VOUT, but recommends ≥10µF ceramic with ESR ≤200mΩ for stability and transient response. For heavy load steps, pairing 10µF MLCC with 220µF low-ESR tantalum improves hold-up time without compromising phase margin.

Can AP7176BSP-13 operate with VIN = VCNTL?

Yes - VIN and VCNTL may share the same rail if it falls within both ranges (≥3.0V for VCNTL, ≤3.65V for VIN). However, separating them is preferred: VCNTL at 5V improves noise immunity and dropout performance, while VIN can be minimized to extend battery life in portable systems.

How does the PG pin behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low within 10µs of junction temperature reaching +170°C. It remains low until the die cools by +50°C hysteresis and a new soft-start cycle completes - ensuring downstream logic sees a clean, debounced fault indication.

Is the NC pin on AP7176BSP-13 electrically isolated or internally tied?

Pin 5 (NC) is unconnected at the die level - no bond wire, no internal circuitry. It must remain floating with no PCB trace or solder mask opening; connecting it risks mechanical stress on the package or unintended coupling into sensitive analog nodes like FB or PG.