Diodes Incorporated AP7176BMP-13

Overview

AP7176BMP-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 precise sequencing, features 0.30V dropout at 1.2V/3A, and operates from -40°C to +125°C junction temperature in MSOP-8EP package.

For engineers reviewing the AP7176BMP-13 datasheet, AP7176BMP-13 pinout, AP7176BMP-13 application, or AP7176BMP-13 equivalent, key selection criteria include VIN/VCNTL separation for thermal optimization, PG delay timing (1–4 ms), soft-start interval (0.3–1.2 ms), and compatibility with low-ESR MLCC output capacitors (8–1100 µF).

Technical Context

The AP7176B employs a dual-rail architecture: VIN supplies power path current while VCNTL (3.0–5.5V) powers control circuitry, enabling sub-300mV dropout and reduced thermal dissipation. Its error amplifier compares FB voltage against a 0.8V precision reference to regulate VOUT via an external resistor divider.

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; PG output uses open-drain nMOS with 90–95% VREF threshold and 10µs debounce.

Key Specifications

Pinout & Package

The AP7176BMP-13 is housed in a thermally enhanced MSOP-8EP package with exposed pad (EP) connected to GND, offering θJA = 80°C/W and θJC = 30°C/W on standard 2"×2" FR-4 PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6216D122MR-G and ADM7172ACPZ-R7, the AP7176BMP-13 uniquely satisfies 3A output with dual-supply architecture and PG signaling-enabling robust power sequencing in FPGA, DDR, and notebook core applications where thermal margin and startup coordination are critical.

Availability

AP7176BMP-13 is available at Aetrix Electronics and suitable for notebook core power, FPGA I/O banks, and DDR VTT termination requiring stable component supply, long-term lifecycle assurance, and consistent thermal performance across industrial temperature ranges.

Supply support for AP7176BMP-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 ICs, with design centers in Asia, Europe, and the U.S., and manufacturing facilities certified to IATF 16949.

The AP7176B belongs to Diodes' high-current LDO portfolio targeting power management in computing, communications, and industrial systems where low dropout, sequencing capability, and thermal resilience are essential.

FAQ

What is the minimum required output capacitance for stable operation at 3A load?

The AP7176BMP-13 requires a minimum 8µF output capacitor with ESR ≤200mΩ for stability at full 3A load. Ceramic MLCCs are preferred; bulk capacitors (e.g., POSCap) may be added in parallel for improved transient response. Layout must place COUT within 5mm of VOUT and GND pins to minimize loop inductance.

Can the AP7176BMP-13 operate with VIN and VCNTL powered in any sequence?

Yes-the AP7176BMP-13 has independent POR circuits for VIN and VCNTL, allowing either rail to power up first. However, prolonged VOUT forcing without VIN risks reverse conduction through the internal parasitic diode and potential damage; ensure VIN is present before enabling VOUT under load.

How does the PG output behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low via its internal nMOS transistor, signaling loss of regulation regardless of FB voltage. PG remains low until junction temperature drops by ~50°C, at which point soft-start reinitiates and PG asserts high after the 1–4ms delay once VFB stabilizes above 90% VREF.

Is an external pull-up resistor required for the EN pin?

No-an internal 5µA current source pulls EN high when left floating, enabling the device without external components. An external pull-up is optional for noise immunity in high-EMI environments, but not required for basic functionality or default enable behavior.