Diodes Incorporated ZXCL5213V40H5TA

Overview

ZXCL5213V40H5TA from Diodes Incorporated is a micropower low-dropout linear regulator delivering fixed 4.0 V output 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 with <10 nA shutdown current. It supports battery-powered portable electronics requiring stable, ultra-low-quiescent-power voltage regulation.

For engineers reviewing the ZXCL5213V40H5TA datasheet, ZXCL5213V40H5TA pinout, ZXCL5213V40H5TA application, or ZXCL5213V40H5TA equivalent, key selection criteria include dropout performance at light-to-moderate loads, no-load stability without external bypass, thermal shutdown behavior, and compatibility with ceramic output capacitors ≥1 µF.

Technical Context

The ZXCL5213V40H5TA employs a PMOS pass transistor architecture enabling low ground current across operating conditions-including dropout, startup, and full 150 mA load-and eliminates need for external bypass capacitor to achieve low noise. Its bandgap reference and error amplifier drive a buffer stage controlling the pass device with internal current limiting and thermal shutdown.

Enable logic is TTL/CMOS compatible (VENH ≥2.2 V, VENL ≤0.8 V), with 150 mV hysteresis ensuring clean turn-on; the N/C pin (Pin 4) must be left open or tied to GND (Pin 2), not VIN. Dropout is defined as VIN–VO when VO drops 100 mV below nominal-verified at 85 mV @ 50 mA and 140–280 mV @ 100 mA depending on variant.

Key Specifications

Pinout & Package

SC70-5/SOT353 (H5) package: 1.30 mm × 2.10 mm × 0.95 mm body, 0.65 mm pitch, 5-terminal surface-mount outline with exposed pad not present; optimized for space-constrained PCBs where SOT23 footprint is prohibitive.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Compared with AP7115-40SEG-7 and AP2125KS-4.0TRG1, ZXCL5213V40H5TA delivers superior dropout (85 mV vs. ≥250 mV), lower ground current (50 µA vs. ≥60 µA), and enable control in half the footprint-making it uniquely suited for space- and energy-constrained portable designs despite NRND status.

Availability

ZXCL5213V40H5TA is available at Aetrix Electronics and suitable for portable medical sensors, wireless IoT end nodes, industrial handheld scanners, and smart camera modules requiring stable component supply under long-lifecycle, low-volume production constraints.

Supply support for ZXCL5213V40H5TA 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design centers across Asia, Europe, and the US, serving industrial, computing, consumer, and communications markets.

The ZXCL series was developed specifically for space- and power-constrained portable electronics, emphasizing ultra-small packaging (SC70-5), micropower operation, and no-load stability-targeting battery-powered instrumentation and handheld devices.

FAQ

What is the maximum input voltage for ZXCL5213V40H5TA?

The absolute maximum input voltage is 7.0 V referenced to GND. For reliable operation, VIN must stay within 2.0 V to 5.5 V per recommended conditions; exceeding 5.5 V risks permanent damage even briefly. The device begins regulating when VIN exceeds ~1.3 V, but normal operation requires VIN > VOUT + 0.5 V (i.e., >4.5 V).

Can ZXCL5213V40H5TA operate without an output capacitor?

No-it requires a minimum 1 µF ceramic output capacitor (X7R dielectric recommended) for stability across all loads, including no-load. Omitting the capacitor causes oscillation and output voltage collapse. Larger values (e.g., 2.2 µF) improve transient response and reduce noise but do not harm stability.

Is Pin 4 (N/C) truly unused, or does it serve a function?

Pin 4 is explicitly designated "No Connection" and must be left floating or tied to GND (Pin 2). Connecting it to VIN violates the datasheet and may cause unpredictable behavior or reduced reliability. This pin has no internal connection and serves only as a mechanical placeholder in the SC70-5 leadframe.

Why is ZXCL5213V40H5TA marked "Not Recommended for New Design"?

Diodes Incorporated classifies this part as NRND due to strategic portfolio rationalization-not obsolescence or reliability issues. It remains fully functional, supported by existing stock and datasheet DS33439. Customers designing new products should evaluate AP7115-40SEG-7 or AP2125KS-4.0TRG1 only if SC70-5 footprint and 85 mV dropout are not required.