Diodes Incorporated AP2114H-3.3TRG1

Overview

AP2114H-3.3TRG1 from BCD Semiconductor is a fixed-output 3.3V, 1A CMOS low-dropout linear regulator with enable control, ±1.5% output accuracy, 450mV typical dropout at 1A, and 30μVRMS output noise. It delivers stable power for noise-sensitive analog circuitry in compact consumer displays and set-top boxes using SOT-223 packaging.

For engineers reviewing the AP2114H-3.3TRG1 datasheet, AP2114H-3.3TRG1 pinout, AP2114H-3.3TRG1 application, or AP2114H-3.3TRG1 equivalent, key selection criteria include guaranteed 1A load capability, low-noise regulation under varying line/load conditions, thermal shutdown behavior, and compatibility with 4.7μF ceramic output capacitors without external compensation.

Technical Context

The AP2114H-3.3TRG1 integrates a precision bandgap reference, error amplifier, and PMOS pass transistor in a CMOS process to achieve low quiescent current (65–90μA) and high PSRR (65dB @ 1kHz). Its foldback short-circuit protection limits fault current to 50mA while maintaining thermal shutdown at 160°C with 25°C hysteresis.

Designed for fixed-output operation, it requires no external feedback resistors and supports fast 20μs startup time. The EN pin enables logic-level control (VIH = 1.5V, VIL = 0.4V), and internal 3MΩ pull-down ensures default-off behavior when unconnected.

Key Specifications

Pinout & Package

SOT-223 package (H variant) with exposed thermal pad on bottom; footprint compatible with JEDEC MO-178AB standard; thermal resistance θ_JA = 128°C/W (no heatsink).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-3302E/MB and TLS850F3TAV50, the AP2114H-3.3TRG1 uniquely balances 1A output, low-noise performance, logic-enable control, and SOT-223 thermal efficiency-making it optimal for cost-sensitive, high-reliability consumer display power rails.

Availability

AP2114H-3.3TRG1 is available at Aetrix Electronics and suitable for LCD monitors, set-top boxes, and smart TV main boards requiring stable component supply, RoHS-compliant green packaging, and long-term production continuity.

Supply support for AP2114H-3.3TRG1 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 supplier specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and computing markets.

The AP2114 product line targets cost-effective, high-performance LDO regulation for display and multimedia applications-emphasizing low noise, wide input range, and robust protection features in standard surface-mount packages.

FAQ

What is the minimum input voltage required for AP2114H-3.3TRG1 to maintain regulation at full 1A load?

The minimum input voltage is 3.75V, calculated as VOUT + VDROP = 3.3V + 450mV (typical dropout). At 1A load and 25°C, regulation is maintained down to 3.75V; worst-case dropout is 750mV, so 4.05V ensures margin across temperature and process variation.

Can AP2114H-3.3TRG1 operate with a 2.2μF ceramic output capacitor?

No-datasheet specifies ≥4.7μF ceramic (or equivalent tantalum/aluminum) for stability. Using 2.2μF risks oscillation due to insufficient phase margin; the internal compensation is optimized for ≥4.7μF with ESR < 100mΩ.

Does the EN pin require an external pull-up resistor for reliable startup?

No-the device integrates a 3MΩ internal pull-down resistor on EN, ensuring default shutdown at power-on. A pull-up is only needed if active-high enable is required from a high-impedance source; direct GPIO connection suffices for most microcontroller interfaces.

Is thermal derating required when mounting AP2114H-3.3TRG1 on a 2-layer PCB without thermal vias?

Yes-θ_JA rises significantly without thermal vias or copper pour. With only 1 in² of 1oz copper on top layer and no thermal vias, θ_JA may exceed 200°C/W. Derate maximum continuous current to ≤600mA at 85°C ambient to limit junction temperature below 125°C.