Diodes Incorporated ZXCL5213V33H5TA

Overview

ZXCL5213V33H5TA from Diodes Incorporated is a micropower 3.3 V fixed-output low-dropout (LDO) linear regulator in SC70-5/SOT353 package, featuring 85 mV dropout at 50 mA load, 50 µA ground current at 150 mA, and active-high enable control. It delivers stable regulation for battery-powered portable electronics requiring ultra-low quiescent current and no-load stability.

For engineers reviewing the ZXCL5213V33H5TA datasheet, ZXCL5213V33H5TA pinout, ZXCL5213V33H5TA application, or ZXCL5213V33H5TA equivalent, key selection criteria include dropout voltage under light-to-moderate load, shutdown current (<1 µA), thermal overload protection, and compatibility with 1 µF ceramic output capacitors without external compensation.

Technical Context

This LDO employs a PMOS pass transistor architecture enabling low dropout and near-constant ground current across load (25–50 µA from no load to 150 mA). Its bandgap reference and error amplifier deliver ±2% output voltage accuracy over temperature and line/load variations.

The device integrates TTL/CMOS-compatible active-high EN pin with 150 mV hysteresis, thermal shutdown activation at 125 °C, and current limiting (typ. 230 mA). It operates with input voltages from 2.0 V to 5.5 V and maintains regulation down to 0 mA load without oscillation.

Key Specifications

Pinout & Package

SC70-5/SOT353 (H5) package: 1.3 mm × 2.1 mm footprint, 0.65 mm pitch, 0.95 mm height - optimized for space-constrained portable PCBs.

Key Features

Applications

Availability

ZXCL5213V33H5TA is available at Aetrix Electronics and suitable for cellular handsets, portable medical sensors, digital camera modules, and industrial handheld scanners requiring stable component supply with long-term lifecycle visibility.

Supply support for ZXCL5213V33H5TA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The ZXCL series was designed specifically for space- and power-constrained portable electronics, delivering micropower LDO performance in ultra-small SC70-5 and SOT25 packages with no external compensation requirements.

FAQ

What is the minimum input voltage required for regulation at 3.3 V output?

The ZXCL5213V33H5TA begins regulating when VIN exceeds ~1.3 V, but for stable operation with margin, VIN must be ≥ VOUT + 0.5 V = 3.8 V. At 3.385 V (3.3 V + 85 mV dropout), it sustains 50 mA load; below that, output drops linearly with input.

Can this regulator operate without an output capacitor?

No - although the device is no-load stable, a minimum 1 µF ceramic output capacitor is required for full-load stability, transient response, and noise reduction. Omitting it risks oscillation under load steps or elevated temperatures, per design validation in DS33439.

Is the N/C pin electrically isolated or internally connected?

Pin 4 (N/C) is not bonded to any internal circuitry and must be left open or connected to GND (pin 2). The datasheet explicitly warns against connecting it to VIN or EN, as it has no functional role and may introduce parasitic coupling if misused.

Does the EN pin have internal pull-up or pull-down resistors?

No - the EN pin has no internal biasing. It requires an external logic signal or direct tie to VIN for normal operation. Leaving it floating is undefined and may cause erratic enable/disable behavior due to noise susceptibility.