Diodes Incorporated AP2114H-1.2TRG1

Overview

AP2114H-1.2TRG1 from BCD Semiconductor is a 1.2 V fixed-output, 1 A CMOS low-dropout linear regulator with enable control, ±1.5% output accuracy, 450 mV typical dropout at 1 A (for 3.3 V version; 1.2 V version specified at 1.2–1.3 V dropout), and 30 μV_RMS output noise. It operates from 2.5 V to 6.0 V input and supports LCD monitor/TV power rails requiring stable, low-noise 1.2 V bias.

For engineers reviewing the AP2114H-1.2TRG1 datasheet, AP2114H-1.2TRG1 pinout, AP2114H-1.2TRG1 application, or AP2114H-1.2TRG1 equivalent, key selection criteria include guaranteed 1 A load capability, thermal shutdown at 160 °C, EN logic compatibility (VIH = 1.5 V), SOT-223 package thermal resistance (θ_JA = 128 °C/W), and stability with 4.7 μF ceramic output capacitors.

Technical Context

The AP2114H-1.2TRG1 implements a CMOS-based LDO architecture with internal voltage reference (0.8 V for adjustable variants), fold-back short-circuit protection (50 mA limit), and thermal shutdown with 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.

It delivers regulated 1.2 V output with ±1.5% initial accuracy over load (1 mA–1 A), line (2.5–6.0 V), and temperature (−40 °C to +85 °C) conditions, supported by 0.02%/V typical line regulation and 0.2%/A typical load regulation - enabling use in noise-sensitive analog and digital core supplies where PSRR (68 dB @ 1 kHz) and low quiescent current (60 μA) are critical.

Key Specifications

Pinout & Package

SOT-223 (H) package: 3-pin thermally enhanced surface-mount outline with exposed pad (pin 2 = VIN, pin 3 = VOUT, pin 1 = GND). Thermal resistance θ_JA = 128 °C/W (no heatsink), θ_JC = 50.9 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70012DBVR and MCP1700T-1202E/TT, the AP2114H-1.2TRG1 uniquely balances 1 A output, enable functionality, thermal protection, and low noise - making it the sole option among the three qualified for high-current, safety-critical display and SoC power domains.

Availability

AP2114H-1.2TRG1 is available at Aetrix Electronics and suitable for LCD monitor power rails, embedded microcontroller core supplies, and digital TV SoC I/O banks requiring stable component supply with RoHS-compliant green packaging (G1 suffix).

Supply support for AP2114H-1.2TRG1 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 cost-sensitive, high-volume applications demanding reliable fixed- and adjustable-output LDOs with robust protection and low noise - particularly in display, STB, and embedded system power trees.

FAQ

What is the minimum input voltage required for AP2114H-1.2TRG1 to maintain regulation at full 1 A load?

The AP2114H-1.2TRG1 requires VIN ≥ VOUT + VDROP. For 1.2 V output, its dropout is specified as 1.2–1.3 V at 1 A, meaning minimum input is 2.4–2.5 V. The recommended operating range starts at 2.5 V per datasheet, aligning with this requirement and ensuring margin for line regulation and transient response.

Can AP2114H-1.2TRG1 be used with aluminum electrolytic output capacitors?

Yes - the datasheet explicitly states stability with 4.7 μF aluminum electrolytic, ceramic, and tantalum capacitors. ESR range compatibility is built into the internal compensation, eliminating need for external RC networks. Aluminum types are acceptable where cost or temperature range outweighs ESL/ESR trade-offs.

Does the EN pin require an external pull-up resistor to ensure proper startup?

No - the EN pin has an internal 3 MΩ pull-down resistor. When left unconnected, EN defaults to logic low (shutdown). To enable operation, a logic-high signal ≥1.5 V must be actively driven; no external pull-up is needed or recommended, as it would increase standby current unnecessarily.

How does the 60 Ω VOUT discharge resistor function during shutdown?

When EN is pulled low, the internal 60 Ω resistor connects VOUT to GND, discharging the output capacitor. With a 4.7 μF capacitor, time constant τ = R × C ≈ 282 μs - enabling VOUT to fall below 10% in under 1 ms. This meets fast-turnoff requirements in USB and display applications where residual voltage must clear before system reset.