Diodes Incorporated AP2114S-1.8G1

Overview

AP2114S-1.8G1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.8V, 1A CMOS low-dropout linear regulator with enable control, ±1.5% output accuracy, 500mV typical dropout at 1A, and 30μVRMS output noise. It delivers stable power to core logic rails in LCD monitors and STB mainboards where low-noise, high-accuracy regulation is critical.

For engineers reviewing the AP2114S-1.8G1 datasheet, AP2114S-1.8G1 pinout, AP2114S-1.8G1 application, or AP2114S-1.8G1 equivalent, key selection criteria include dropout voltage at full load, PSRR at 1kHz, thermal resistance (θJC = 22°C/W), EN logic thresholds, and compatibility with 4.7μF ceramic output capacitors.

Technical Context

The AP2114S-1.8G1 uses a CMOS pass transistor architecture with internal bandgap reference and foldback current limiting. Its enable input supports active-high logic control with 1.5V VIH and 0.4V VIL thresholds, enabling precise system-level power sequencing.

Thermal shutdown activates at 160°C with 25°C hysteresis, and the device maintains ±1.5% output accuracy across –40°C to +85°C ambient while delivering 1A continuous current with <0.2%/A load regulation and 0.02%/V line regulation.

Key Specifications

Pinout & Package

AP2114S-1.8G1 is packaged in TO-263-3 (D²PAK), a thermally enhanced surface-mount package with exposed thermal pad. 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 MCP1703T-1802E/MB and XC6210B182MR-G, AP2114S-1.8G1 uniquely combines 1A output, TO-263-3 thermal performance (θJC = 22°C/W), and enable functionality - making it optimal for high-current, thermally demanding consumer display applications.

Availability

AP2114S-1.8G1 is available at Aetrix Electronics and suitable for LCD monitor power rails, STB mainboard core supplies, and LCD TV backlight controllers requiring stable component supply, RoHS-compliant green packaging, and long-term industrial availability.

Supply support for AP2114S-1.8G1 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 series targets cost-sensitive, high-volume consumer electronics requiring robust, low-noise LDOs with flexible packaging and guaranteed 1A output - particularly in display and multimedia platforms.

FAQ

What is the minimum input voltage required for AP2114S-1.8G1 to regulate at full 1A load?

The minimum input voltage is 2.3V, calculated from the typical 500mV dropout voltage plus the 1.8V output. The datasheet specifies 2.5V as the recommended minimum to ensure margin across temperature and process variation, with absolute maximum input at 6.0V.

Can AP2114S-1.8G1 be used with a 2.2μF ceramic output capacitor?

No - the device requires ≥4.7μF output capacitance for stability, as validated across ceramic, tantalum, and aluminum electrolytic types. Using 2.2μF risks oscillation or poor transient response, per Section 3 of the datasheet's stability guidelines.

Does AP2114S-1.8G1 support reverse-voltage protection?

No - the device lacks integrated reverse-polarity protection. If input reversal is possible in the system, an external series Schottky diode or ideal diode controller must be added to prevent damage to the LDO and downstream circuitry.

How does the EN pin behave during power-up sequencing?

The EN pin has an internal 3.0MΩ pull-down resistor, ensuring the regulator remains off until a valid high logic level (≥1.5V) is applied. This prevents uncontrolled turn-on during brown-out or staggered supply ramp-up, supporting deterministic system boot behavior.