Diodes Incorporated AP2114S-1.2G1

Overview

AP2114S-1.2G1 from BCD Semiconductor Manufacturing Limited is a fixed-output 1.2 V, 1 A CMOS low-dropout linear regulator with enable control, thermal shutdown, and foldback current limiting. It delivers ±1.5% output accuracy, 450 mV typical dropout at 1 A (for 3.3 V version; 1.2 V version specified at 1.3 V max dropout), 30 μV_RMS output noise, and operates from −40°C to +85°C ambient. It powers core logic rails in LCD monitors and STB power domains.

For engineers reviewing the AP2114S-1.2G1 datasheet, AP2114S-1.2G1 pinout, AP2114S-1.2G1 application, or AP2114S-1.2G1 equivalent, key selection criteria include guaranteed 1 A load capability with low quiescent current (60 μA), stable operation with 4.7 μF ceramic output capacitors, and TO-263-3 package thermal performance (θ_JA = 73°C/W, θ_JC = 22°C/W).

Technical Context

The AP2114S-1.2G1 implements a CMOS-based LDO architecture with internal voltage reference (0.8 V for adjustable variants), precision error amplifier, and PMOS pass transistor. Its enable input controls a high-side switch that disconnects the pass element, reducing standby current to ≤1.0 μA.

Protection features include foldback short-circuit current limiting (50 mA), thermal shutdown at 160°C with 25°C hysteresis, and ESD robustness (400 V MM, 4000 V HBM). It achieves 68 dB PSRR at 1 kHz and maintains ±1.5% output accuracy across line, load, and temperature.

Key Specifications

Pinout & Package

AP2114S-1.2G1 uses the TO-263-3 (D²PAK) surface-mount package with exposed thermal pad (pin 2 = VIN, pin 3 = VOUT, pin 1 = GND). This 3-pin configuration eliminates enable and ADJ pins, confirming it is a fixed-output variant with integrated feedback network.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-1202E/MB and XC6209F122MR-G, AP2114S-1.2G1 uniquely combines 1 A output, ±1.5% accuracy, thermal shutdown, and TO-263-3 thermal efficiency-making it the sole fit for high-current, thermally demanding consumer display applications.

Availability

AP2114S-1.2G1 is available at Aetrix Electronics and suitable for LCD monitor power rails, set-top box core logic, and industrial display controllers requiring stable component supply, RoHS-compliant green packaging, and long-term lifecycle support.

Supply support for AP2114S-1.2G1 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 and industrial markets.

The AP2114 series targets cost-sensitive, high-volume consumer electronics requiring high-current, low-noise LDOs with robust protection-specifically optimized for LCD/LED display and digital TV power architectures.

FAQ

What is the minimum input voltage required for AP2114S-1.2G1 to regulate 1.2 V at 1 A?

The maximum dropout voltage is 1300 mV at 1 A load, so VIN must be ≥2.5 V to maintain regulation. At lighter loads, dropout decreases-for example, 1200 mV typical at 1 A per datasheet Table 8-allowing operation down to 2.4 V with margin. Input must also stay within absolute max rating (6.5 V) and recommended range (2.5–6.0 V).

Can AP2114S-1.2G1 use a 2.2 μF ceramic output capacitor instead of 4.7 μF?

No. The datasheet explicitly specifies stability with ≥4.7 μF ceramic, tantalum, or aluminum electrolytic capacitors. Using 2.2 μF risks oscillation or poor transient response due to insufficient phase margin, especially under dynamic load steps. Minimum capacitance is a design requirement-not a recommendation.

Does AP2114S-1.2G1 have an enable pin, and how is it controlled?

No. AP2114S-1.2G1 is a fixed-output variant in TO-263-3 package and does not include an enable (EN) pin. Enable functionality is only present in SOIC-8 and PSOP-8 packages (e.g., AP2114M-1.2G1), which feature pin 4 as EN. The "S" prefix denotes TO-263-3, and its pinout is strictly VIN–VOUT–GND.

How does thermal performance differ between AP2114S-1.2G1 (TO-263-3) and AP2114D-1.2G1 (TO-252-2)?

AP2114S-1.2G1 has θ_JA = 73°C/W and θ_JC = 22°C/W, while AP2114D-1.2G1 (TO-252-2) has θ_JA = 90°C/W and θ_JC = 35°C/W. The TO-263-3's lower thermal resistance enables higher continuous current in thermally constrained layouts-e.g., 1 A at 50°C ambient with minimal copper area versus needing >4 cm² for TO-252-2 at same conditions.