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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated AZ39151D5-5.0TRE1

Name: AZ39151D5-5.0TRE1
Brand: Diodes Incorporated
SKU: AZ39151D5-5.0TRE1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ39151D5-5.0TRE1

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: TO-252-6, DPAK (5 Leads + Tab)

Datasheet:: AZ39151D5-5.0TRE1.pdf

Description:: IC REG LINEAR 5V 1.5A TO252-5

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Product details

Overview

AZ39151D5-5.0TRE1 from Diodes Incorporated is a fixed-output 5.0V, 1.5A ultra-low dropout linear regulator in TO-252-5 package, featuring 375mV dropout at full load, ±1% output accuracy, and TTL/CMOS-compatible enable control. It delivers stable regulation for PC add-in cards and high-efficiency linear power supplies where minimal voltage overhead and low ground current are critical.

For engineers reviewing the AZ39151D5-5.0TRE1 datasheet, AZ39151D5-5.0TRE1 pinout, AZ39151D5-5.0TRE1 application, or AZ39151D5-5.0TRE1 equivalent, key selection criteria include dropout performance at 1.5A, thermal resistance (θ_JA = 100°C/W), reverse-battery protection, fast transient response, and compatibility with 10µF input/output ceramic capacitors.

Technical Context

The AZ39151D5-5.0TRE1 employs a PMOS pass transistor architecture enabling ultra-low dropout and inherent reverse-voltage protection without external components. Its internal current and thermal limiting functions operate independently of external biasing, ensuring safe shutdown under overload or junction temperature exceeding +125°C.

It integrates a precision bandgap reference and error amplifier with guaranteed ±1% output accuracy over –40°C to +125°C, and achieves 65dB PSRR at 120Hz while maintaining sub-200µV_RMS output noise (10Hz–100kHz) at 100mA load - critical for noise-sensitive analog and digital subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±1% over –40°C to +125°C - ensures stable logic supply for 5V-tolerant microcontrollers and peripherals
Dropout Voltage	375mV at I_OUT = 1.5A - enables operation with only 5.375V input, ideal for post-regulation after 5.5V SMPS rails
Ground Current	17mA typical at 1.5A load - minimizes wasted power in battery-backed or thermally constrained systems
Enable Threshold	V_EN(HI) ≥ 2.25V, V_EN(LO) ≤ 0.8V - compatible with standard 3.3V/5V GPIO without level-shifting
Thermal Resistance	θ_JA = 100°C/W (TO-252-5) - supports 1.5A continuous output with ≤25°C ambient rise on 1-in² 2-oz copper pad
PSRR	65dB at 120Hz - suppresses ripple from upstream switching converters feeding sensitive analog circuitry
Output Noise	200µV_RMS (10Hz–100kHz) - meets low-noise requirements for ADC references and audio DAC supplies

Pinout & Package

Package: TO-252-5 (DPAK-5), surface-mount, exposed thermal pad (internally connected to GND). Dimensions: 6.65 × 9.90 × 1.78 mm (L × W × H); thermal pad area supports efficient PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1	EN	TTL/CMOS-compatible enable input: logic high ≥2.25V enables regulation; open or low ≤0.8V places device in <130µA standby
2	VIN	Unregulated input terminal - accepts up to 13.5V DC; requires ≥10µF input capacitance for stability
3	GND	Power ground reference - internally bonded to exposed thermal tab; must be connected to large copper pour for thermal management
4	VOUT	Regulated 5.0V output - delivers up to 1.5A with <50mV load regulation across full current range
5	NC	No connection - electrically isolated; no internal bond wire or circuit connection

Key Features

Feature	Design Value
Reversed-battery protection	Withstands –15V input without damage or reverse current flow - eliminates need for external series diode in automotive or hot-swap applications
Fast transient response	≤100µs recovery time for 1.5A load step (10%–90%) - maintains <±50mV output deviation with 10µF output capacitor
Internal thermal shutdown	Activates at T_J ≥ +150°C with hysteresis - prevents permanent damage during sustained overload or poor heatsinking
Low ground current in dropout	5mA typical when VIN ≤ V_OUT – 0.5V - extends usable input range and reduces quiescent loss during brown-out conditions
Short-circuit current limit	2.8A typical - provides robust fault containment without external current-sense resistors or foldback circuitry

Applications

PC Add-in Card Power

LCD TV Mainboard Supply

Use Scenario: Regulating 5V rail for PCIe-based expansion cards with tight board space and thermal constraints.

IC Role / Device Role / Timing Role: Primary LDO for FPGA I/O banks and SerDes termination, requiring low noise and fast load transient response.

Use Value: 375mV dropout allows use of 5.5V intermediate bus; ±1% accuracy ensures compliance with PCIe 5.0 I/O voltage tolerance (4.75–5.25V).

Use Scenario: Providing clean 5V supply to LCD panel timing controllers and interface ICs in flat-panel TVs.

IC Role / Device Role / Timing Role: Post-regulator after 12V-to-5V buck converter, suppressing switching noise before display timing circuits.

Use Value: 65dB PSRR at 120Hz and 200µV_RMS noise prevent visible flicker or color banding in high-resolution displays.

Hi-end DVD Recorder Logic Rail

Set-top Box USB Hub Supply

Use Scenario: Powering servo motor drivers and MPEG decoder SoCs in premium DVD recorders with variable line input.

IC Role / Device Role / Timing Role: Stable 5V source for real-time video processing cores and analog front-end biasing.

Use Value: Reversed-lead insertion protection prevents damage during field service; 100°C/W θ_JA enables convection-only cooling in sealed enclosures.

Use Scenario: Delivering regulated 5V to USB 2.0 hub ICs in cable/satellite set-top boxes with shared 12V input.

IC Role / Device Role / Timing Role: Local LDO for USB VBUS distribution, enabling independent enable/disable per port via EN pin.

Use Value: TTL/CMOS-compatible EN pin allows direct GPIO control from ARM-based SoC; 1.5A rating supports four downstream ports with 500mA each.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-output LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP2112K-5.0TRG1	0.8A max output, 400mV dropout at 0.8A, no reverse-battery protection, θ_JA = 120°C/W	Suitable for lower-current logic rails but lacks fault protection and thermal margin for 1.5A continuous loads	Select if cost sensitivity outweighs current capability and protection requirements
MCP1703T-5002E/MB	250mA max output, 600mV dropout at 250mA, ±2% accuracy, no EN pin, SOT-23-5 package	Targeted at ultra-low-power microcontroller I/O rails - insufficient for PC add-in card or display timing loads	Choose only for space-constrained, sub-300mA applications where enable control and high current are unnecessary

Compared with AP2112K-5.0TRG1 and MCP1703T-5002E/MB, the AZ39151D5-5.0TRE1 uniquely combines 1.5A output, 375mV dropout, reverse-battery protection, and enable functionality in TO-252-5 - making it the only option among the three qualified for thermally demanding, high-reliability 5V system rails.

Availability

AZ39151D5-5.0TRE1 is available at Aetrix Electronics and suitable for PC add-in card power, LCD TV mainboard supply, and set-top box USB hub applications requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for automated assembly.

Supply support for AZ39151D5-5.0TRE1 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 and manufacturing operations across Asia, the US, and Europe.

The AZ39151 belongs to Diodes' high-current LDO regulator product line, engineered specifically for low-voltage, high-current systems such as PC add-in cards and consumer display electronics where minimal dropout and robust protection are mandatory.

FAQ

What is the minimum input voltage required for stable 5.0V output at 1.5A?

The AZ39151D5-5.0TRE1 requires VIN ≥ 5.375V to maintain regulation at 1.5A load, based on its guaranteed 375mV dropout voltage. Operation below this threshold causes output collapse; the device remains functional down to VIN = VOUT(NOMINAL) – 0.5V but enters dropout with reduced ground current efficiency.

Can the NC pin (Pin 5) be connected to ground or left floating?

Pin 5 is electrically unconnected - no internal bond wire or circuit node exists. It may be left floating or tied to ground for mechanical stability or EMI reduction, but grounding provides no electrical benefit and does not affect thermal or electrical performance.

Does the AZ39151D5-5.0TRE1 require external capacitors, and what types are recommended?

Yes: ≥10µF input (CIN) and ≥10µF output (COUT) capacitors are mandatory for stability. Ceramic X5R/X7R types are recommended; aluminum polymer or tantalum may be used if ESR > 20mΩ is maintained. The device is not stable with <5µF total output capacitance.

How does the enable pin behave during power-up sequencing?

The EN pin has no internal pull-up or pull-down; it must be actively driven high (≥2.25V) to enable regulation. If left floating, leakage paths may cause unpredictable startup - Diodes recommends tying EN to VIN through a 100kΩ resistor or using a dedicated power-good signal for controlled sequencing.

AZ39151D5-5.0TRE1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-252-6, DPAK (5 Leads + Tab)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 13.5V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.7V @ 1.5A

Current - Output:: 1.5A

Current - Quiescent (Iq):: 10 mA

Current - Supply (Max):: 34 mA

PSRR:: 65dB (120Hz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Reverse Polarity

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252-5

AZ39151D5-5.0TRE1 FAQ

1.How can I place an order for AZ39151D5-5.0TRE1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ39151D5-5.0TRE1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AZ39151D5-5.0TRE1 reliable?

The price and inventory of AZ39151D5-5.0TRE1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ39151D5-5.0TRE1 is usually 5 days.

3.What payment methods are accepted for AZ39151D5-5.0TRE1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ39151D5-5.0TRE1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ39151D5-5.0TRE1?

AZ39151D5-5.0TRE1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ39151D5-5.0TRE1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AZ39151D5-5.0TRE1?

For technical support, including AZ39151D5-5.0TRE1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ39151D5-5.0TRE1 requirements.

6.How does Aetrix verify that AZ39151D5-5.0TRE1 is sourced from the original manufacturer or authorized distributors?

All AZ39151D5-5.0TRE1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AZ39151D5-5.0TRE1 meets industry standards.

7.What is the process for return or replacement of AZ39151D5-5.0TRE1?

All AZ39151D5-5.0TRE1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ39151D5-5.0TRE1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AZ39151D5-5.0TRE1 part is unused and in its original packaging.

Return procedure for AZ39151D5-5.0TRE1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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