Diodes Incorporated ZXTR2008P5-13

Overview

ZXTR2008P5-13 from Diodes Incorporated is a monolithic high-voltage linear regulator transistor integrating an NPN transistor, 8.2V zener diode, and 150kΩ current-limiting resistor in a single PowerDI5 package. It delivers a regulated 8.2V ±10% output at 15mA across 12–100V input, with 450mA continuous output current capability and 1.82W power dissipation (on 50mm×50mm copper). It serves as a startup supply regulator in PoE-powered DC-DC converters.

For engineers reviewing the ZXTR2008P5-13 datasheet, ZXTR2008P5-13 pinout, ZXTR2008P5-13 application, or ZXTR2008P5-13 equivalent, key selection criteria include input voltage range (12–100V), output regulation tolerance (±10%), thermal resistance (55°C/W junction-to-ambient), quiescent current (275–900µA), and PowerDI5 package compatibility with high-voltage PCB layout constraints.

Technical Context

The ZXTR2008P5-13 implements a series linear regulator using an emitter-follower topology, where the integrated zener sets the base reference and the 150kΩ resistor biases the transistor to maintain regulation without external components. Its internal structure eliminates discrete BOM count while preserving thermal path integrity through the exposed VIN pad.

It operates within -40°C to +125°C junction temperature range and supports safe operation up to 100V input with VOUT clamped to min(VIN+8.2V, 14.5V). Load regulation degrades from –180mV (0.1–30mA) to –500mV (0.1–100mA), and line regulation spans 10–300mV across 12–100V input variation at fixed 15mA load.

Key Specifications

Pinout & Package

Package: PowerDI5 surface-mount package with exposed VIN pad for thermal conduction and mechanical anchoring. Molded green compound, matte tin-plated leads, JEDEC-compliant footprint (D=3.966mm, E=6.504mm, L=0.85mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZXTR2005P5-13, the ZXTR2008P5-13 provides higher regulated voltage for 8V-tolerant circuits; compared with LT3080MPMS8E#PBF, it trades adjustability and current for simplicity, size, and cost in fixed-output HV startup roles.

Availability

ZXTR2008P5-13 is available at Aetrix Electronics and suitable for Power-over-Ethernet (PoE) startup supplies, telecom line card biasing, and industrial DC-DC converter auxiliary rails requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for ZXTR2008P5-13 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, specializing in high-reliability power management, signal integrity, and protection devices for industrial, automotive, and communications markets.

The ZXTR series targets high-voltage linear regulation needs in space-constrained applications, combining transistor, zener, and resistor into monolithic solutions that replace multi-component designs while meeting AEC-Q101 and Green standards.

FAQ

What is the minimum input voltage required for regulation?

The ZXTR2008P5-13 requires a minimum input voltage of 12V to maintain regulated 8.2V output. Below 12V, VOUT follows VIN minus ~1.5V (e.g., 10V input yields ~8.5V output, unregulated). This threshold is defined by the internal zener voltage and transistor VBE drop, and is verified across -40°C to +125°C junction temperature.

Can ZXTR2008P5-13 drive a 40mA load continuously?

No - the datasheet specifies 45mA continuous output current only at VIN = 48V and TA = +25°C with 50mm×50mm copper. At 100V input or elevated ambient temperature, derating applies: at 100V and 70°C ambient, continuous current drops to ~12mA. Always consult the Safe Operating Area curve (Figure 1) for specific VIN/TA combinations.

Is an output capacitor required for stability?

Yes - a minimum 10µF capacitor (tantalum or aluminum electrolytic recommended) must be placed between VOUT and GND. This stabilizes regulation under load transients and prevents oscillation. Ceramic capacitors alone are insufficient due to ESR requirements; a 10µF ceramic in parallel with a 1µF tantalum meets both capacitance and ESR targets per Figure 4 guidelines.

How does the 150kΩ internal resistor affect quiescent current?

The 150kΩ resistor sets base current for the internal NPN transistor, resulting in quiescent current (IQ) ranging from 275µA (VIN=48V) to 900µA (VIN=100V). This resistor enables self-biasing without external components but also defines the upper bound of no-load power loss - e.g., at 100V input, IQ contributes ~90mW static dissipation before any load is applied.