Diodes Incorporated AP2114S-1.8TRG1

Overview

AP2114S-1.8TRG1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.8 V, 1 A CMOS low-dropout linear regulator with enable control, designed for stable power delivery in noise-sensitive analog and digital subsystems. It delivers ±1.5% output accuracy, 450 mV typical dropout at 1 A, 30 μV_RMS output noise, and operates across –40°C to +85°C ambient temperature - used in LCD TV mainboard power rails.

For engineers reviewing the AP2114S-1.8TRG1 datasheet, AP2114S-1.8TRG1 pinout, AP2114S-1.8TRG1 application, or AP2114S-1.8TRG1 equivalent, key selection criteria include dropout voltage at full load, PSRR at 1 kHz, thermal resistance (θ_JC = 22°C/W), EN logic thresholds, and compatibility with 4.7 μF ceramic output capacitors.

Technical Context

The AP2114S-1.8TRG1 implements a CMOS-based LDO architecture with internal bandgap reference, foldback current limiting, and thermal shutdown (160°C trip, 25°C hysteresis). Its enable input accepts TTL-compatible logic levels (VIH ≥ 1.5 V, VIL ≤ 0.4 V) and features a 3 MΩ internal pull-down resistor.

Stability is guaranteed with 4.7 μF ceramic, tantalum, or aluminum electrolytic output capacitors. The device maintains 0.02%/V typical line regulation and 0.2%/A typical load regulation over its full 1 mA–1 A output range, supporting dynamic load steps in embedded display systems.

Key Specifications

Pinout & Package

AP2114S-1.8TRG1 uses the TO-263-3 (D²PAK) thermally enhanced surface-mount package with exposed drain pad for improved heat transfer. Pin 1 = GND, Pin 2 = VIN, Pin 3 = VOUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Compared with MCP1826-1802E/DB and TLS850F1EJXUMA1, AP2114S-1.8TRG1 offers superior noise performance and PSRR while maintaining identical output voltage and current capability - making it optimal for noise-sensitive consumer electronics where thermal efficiency and simplicity are prioritized.

Availability

AP2114S-1.8TRG1 is available at Aetrix Electronics and suitable for LCD TV power rails, set-top box core logic supplies, and industrial display controllers requiring stable component supply, RoHS-compliant green packaging, and tape-and-reel delivery for SMT production.

Supply support for AP2114S-1.8TRG1 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

BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and computing markets.

The AP2114 product line targets high-current, low-noise LDO applications in display electronics and embedded systems, emphasizing thermal efficiency, capacitor flexibility, and robust protection features.

FAQ

What is the minimum input voltage required for AP2114S-1.8TRG1 to maintain regulation at 1 A load?

The minimum input voltage is calculated as V_OUT + V_DROP(MAX) = 1.8 V + 0.7 V = 2.5 V. However, per datasheet test conditions for 1.8 V version, VIN ≥ 2.8 V is specified to guarantee 1 A output with full accuracy and stability across temperature. Below 2.8 V, dropout margin shrinks and regulation may degrade under worst-case conditions.

Can AP2114S-1.8TRG1 operate with a 2.2 μF ceramic output capacitor?

No - the datasheet explicitly specifies stability with ≥4.7 μF ceramic, tantalum, or aluminum electrolytic capacitors. Using 2.2 μF violates the minimum capacitance requirement and risks oscillation or poor transient response. Designers must adhere to the 4.7 μF minimum for guaranteed stability across all operating conditions.

Does AP2114S-1.8TRG1 require an external pull-up resistor on the EN pin?

No - the EN pin has an internal 3 MΩ pull-down resistor. A logic-high signal (≥1.5 V) is sufficient to enable regulation; no external pull-up is needed unless system-level sequencing requires default-disabled behavior with open-drain control signals.

How does the VOUT discharge function work when EN is pulled low?

When EN is driven low, an internal 60 Ω resistor connects VOUT to GND, actively discharging the output capacitor. This ensures rapid rail collapse (<1 ms for 4.7 μF) to prevent floating voltages or unintended device wake-up during power-down sequences in multi-rail systems.