Diodes Incorporated ZXCL5213V28H5TA

Overview

ZXCL5213V28H5TA from Diodes Incorporated is a micropower low-dropout linear regulator delivering a fixed 2.8 V output in an SC70-5/SOT353 package. It features 85 mV dropout at 50 mA load, 50 µA ground current at 150 mA, and active-high enable control with <10 nA shutdown current-designed for space-constrained, battery-powered systems requiring stable low-voltage rail generation.

For engineers reviewing the ZXCL5213V28H5TA datasheet, ZXCL5213V28H5TA pinout, ZXCL5213V28H5TA application, or ZXCL5213V28H5TA equivalent, key selection criteria include ultra-low quiescent current, no-load stability, SC70-5 footprint compatibility, and thermal/overcurrent protection in portable instrumentation and handheld devices.

Technical Context

The ZXCL5213V28H5TA uses a PMOS pass transistor architecture enabling low dropout and minimal ground current across load conditions-including dropout, startup, and full 150 mA operation. Its bandgap reference and error amplifier deliver ±3% output voltage accuracy over temperature and line/load variations.

It integrates TTL/CMOS-compatible active-high enable logic, thermal shutdown (125 °C trip), and current limiting (160–800 mA range). The device operates stably with 1 µF ceramic output capacitors and exhibits 50 µV_RMS output noise (10 Hz–100 kHz) without bypass capacitor.

Key Specifications

Pinout & Package

Package: SC70-5 / SOT353 (H5), 2.1 mm × 1.3 mm × 0.95 mm, 5-pin surface-mount, lead-free and RoHS compliant.

Key Features

Applications

Availability

ZXCL5213V28H5TA is available at Aetrix Electronics and suitable for portable medical sensors, wireless earbud audio bias, industrial handheld scanners, and smart wearable display backlight applications requiring stable component supply with long-term lifecycle assurance.

Supply support for ZXCL5213V28H5TA 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 targets ultra-low-power, space-constrained portable electronics-designed specifically for battery-operated devices where micropower consumption, SC70 packaging, and no-load stability are non-negotiable.

FAQ

What is the minimum input voltage required for regulation at 2.8 V output?

The datasheet specifies VIN(min) > VOUT(nom) + 0.5 V for normal operation, so minimum input is 3.3 V. However, regulation begins when VIN exceeds ~1.3 V, and the device delivers 2.8 V output down to VIN = 2.885 V (2.8 V + 85 mV dropout) at 50 mA load-enabling use with partially discharged single-cell batteries.

Can ZXCL5213V28H5TA drive a 150 mA load continuously without thermal shutdown?

Yes, under typical PCB conditions: with a 2-inch² board, SC70-5 θ_JA ≈ 450 °C/W, and assuming T_AMB = 25 °C, maximum dissipation is ~222 mW. At VIN = 4.2 V and VOUT = 2.8 V, power dissipation is (4.2 − 2.8) V × 0.15 A = 210 mW - below thermal limit. Derating is required above 60 °C ambient.

Is an external capacitor required on the EN pin for reliable startup?

No external capacitor is required, but an RC network (e.g., 100 kΩ + 100 nF) can be added to introduce a controlled startup delay. The EN pin has built-in 150 mV hysteresis to prevent oscillation during slow-rising control signals; rise time should remain under 5 ms for consistent turn-on behavior per datasheet guidance.

Does ZXCL5213V28H5TA require a specific capacitor dielectric for stability?

Yes - X7R ceramic dielectric is recommended for both input and output capacitors. X7R retains ≥80% capacitance across −40 °C to +85 °C, whereas Y5V loses up to 80%, risking instability and degraded transient response. Minimum 1 µF output capacitance is required; larger values reduce noise and improve load step recovery.