Diodes Incorporated ZXTR1135PD8-13

Overview

ZXTR1135PD8-13 from Diodes Incorporated is a high-voltage dual-output linear regulator in PowerDI5060-8 (Type B) package, delivering fixed 5V ±2% and 13V ±10% outputs with up to 50mA per channel. It operates from 18V to 100V input, uses emitter-follower topology, and targets PoE-powered network infrastructure where standard LDOs fail.

For engineers reviewing the ZXTR1135PD8-13 datasheet, ZXTR1135PD8-13 pinout, ZXTR1135PD8-13 application, or ZXTR1135PD8-13 equivalent, key selection criteria include input voltage range (18–100V), dual-rail output tolerance (±2% on 5V, ±10% on 13V), thermal resistance (RθJA = 54.1°C/W on 50mm² copper), and per-channel current capability (50mA continuous @ 48V input).

Technical Context

This device integrates two independent series linear regulators-5V and 13V outputs-within a single monolithic die using emitter-follower architecture, eliminating external pass transistors. Each output features dedicated internal reference and error amplification, with separate load regulation specs: ±50mV for 5VOUT (0.1–50mA), ±900mV for 13VOUT (0.1–100mA).

Thermal design is constrained by RθJC = 15°C/W and RθJL = 8°C/W, requiring direct thermal coupling of the exposed VIN pad to PCB copper. Quiescent current ranges from 300µA to 780µA depending on VIN (48V–100V) and load conditions, enabling low-power standby operation in always-on telecom systems.

Key Specifications

Pinout & Package

Package: PowerDI5060-8 (Type B), surface-mount, thermally enhanced with exposed VIN pad. Molded plastic case meets UL 94V-0; moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output high-voltage linear regulator applications.

Compared with LM2678SD-5.0/NOPB and LT3092IMS8E#PBF, ZXTR1135PD8-13 uniquely delivers integrated dual fixed-voltage regulation from 100V input in one package-enabling simpler, lower-noise, and smaller-footprint solutions for PoE and telecom infrastructure where rail count and input voltage headroom are critical.

Availability

ZXTR1135PD8-13 is available at Aetrix Electronics and suitable for Power over Ethernet (PoE) midspans, DSL line cards, industrial Ethernet switches, and remote radio units requiring stable component supply across extended temperature and high-input-voltage conditions.

Supply support for ZXTR1135PD8-13 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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.

The ZXTR series targets high-voltage analog power management for telecom and networking infrastructure, emphasizing integration, thermal performance, and regulatory compliance in space-constrained applications.

FAQ

What is the maximum safe input voltage for continuous operation?

The ZXTR1135PD8-13 supports continuous operation up to +100V on VIN, with absolute maximum rating confirmed at +100V. Operation beyond this risks permanent damage. At 100V input with 50mA on both outputs, junction temperature must be monitored against the -55°C to +125°C range using RθJA = 54.1°C/W and appropriate PCB copper area.

Can the 5V and 13V outputs be loaded simultaneously at full rated current?

No - total combined DC output current must not exceed 100mA (Note 1). Loading 5VOUT at 50mA and 13VOUT at 50mA simultaneously exceeds safe operating area limits. Recommended use is 50mA on 5VOUT plus ≤30mA on 13VOUT, or 100mA pulsed on 13VOUT with zero 5VOUT load, per Absolute Maximum Ratings table.

Is an input capacitor required, and what value is recommended?

Yes - a 1µF ceramic capacitor is recommended between VIN and GND, placed as close as possible to the device. This stabilizes the high-impedance input node, suppresses high-frequency noise from upstream converters, and prevents oscillation during fast input transients such as PoE hot-swap events.

How does the 13V output's ±10% tolerance impact system design?

The ±10% tolerance (11.7V–14.3V) reflects intentional design for analog bias applications where precise voltage is less critical than headroom and stability. It allows use in RF amplifier stages or op-amp supplies where 13V nominal provides margin above 12V rails, avoiding need for tighter-tolerance (and costlier) alternatives when exact regulation is unnecessary.