Diodes Incorporated AP7387-30FDC-7

Overview

AP7387-30FDC-7 from Diodes Incorporated is a 3.0V fixed-output, wide-input (5–60V), ultra-low-dropout linear regulator delivering 150mA with 700mV dropout at 100mA and 2μA quiescent current. It integrates thermal shutdown, short-circuit protection, and current limiting, and is packaged in the U-DFN2020-6 (Type C) thermally enhanced leadless package for space-constrained battery-powered and automotive sensor systems.

For engineers reviewing the AP7387-30FDC-7 datasheet, AP7387-30FDC-7 pinout, AP7387-30FDC-7 application, or AP7387-30FDC-7 equivalent, key selection criteria include its 60V input capability, ±2% output accuracy, 70dB PSRR at 1kHz, fast load transient response, and thermal performance in the 2.0×2.0mm DFN package.

Technical Context

The AP7387-30FDC-7 employs a precision bandgap reference and high-gain error amplifier to maintain stable 3.0V output across 5–60V input and 0–150mA load. Its internal PMOS pass transistor enables low dropout and eliminates external compensation.

Protection circuitry includes foldback current limiting (250mA typ.), thermal shutdown at +150°C with +30°C hysteresis, and short-circuit detection that clamps output current without latch-up. The U-DFN2020-6 (Type C) package provides θ_JA = 48°C/W and θ_JC = 15.5°C/W for robust thermal management in high-ambient environments.

Key Specifications

Pinout & Package

AP7387-30FDC-7 is housed in a 2.0mm × 2.0mm, 0.65mm height U-DFN2020-6 (Type C) package with an exposed thermal pad (EP) internally connected to GND. The package supports reflow soldering per J-STD-020 Level 1 and features NiPdAu-plated terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-IQ, wide-input LDO applications.

Compared with TPS7B8733QKVURQ1 and MCP1703T-3002E/MB, AP7387-30FDC-7 uniquely balances 60V input, 2μA IQ, integrated thermal/current protection, and compact DFN packaging - making it optimal for space- and power-constrained industrial and HEV auxiliary power designs where automotive qualification is unnecessary.

Availability

AP7387-30FDC-7 is available at Aetrix Electronics and suitable for battery-powered equipment, smoke detectors and sensors, and EV/HEV battery management systems requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for AP7387-30FDC-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications.

The AP7387 belongs to Diodes' high-voltage LDO family, engineered specifically for industrial, automotive, and battery-powered systems demanding wide input range, ultra-low quiescent current, and robust protection in miniature packages.

FAQ

What is the minimum input voltage required for regulation at 3.0V output?

The AP7387-30FDC-7 maintains regulation when VIN ≥ VOUT + VDROP. With a typical dropout of 700mV at 100mA, the minimum input is 3.7V. At full 150mA load, dropout rises to 1100mV, requiring VIN ≥ 4.1V. Below these thresholds, output voltage drops linearly with input.

Can the NC pins (3 and 4) be left floating on the PCB?

No - pins 3 and 4 are internally unconnected but thermally coupled to the die. Diodes recommends tying them to GND on the PCB to maximize copper area for heat spreading and improve thermal resistance by up to 15%. Floating NC pins degrade thermal performance and may increase junction temperature under load.

Is an input capacitor mandatory, and what type is recommended?

Yes - a 1μF ceramic capacitor (X7R or X5R) is required between VIN and GND, placed within 2mm of the device. This decouples high-frequency noise and stabilizes the input during fast load transients. Larger values (e.g., 4.7–10μF) further improve immunity to supply ripple but are not required for basic functionality.

Does the AP7387-30FDC-7 require an external resistor divider for output voltage setting?

No - the AP7387-30FDC-7 is a fixed-output regulator with factory-trimmed 3.0V reference. It contains no feedback pins or external resistor connections. Output voltage cannot be adjusted; alternative part numbers (e.g., AP7387-33FDC-7) are required for 3.3V, 3.6V, or 5.0V outputs.