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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Diodes Incorporated AZ34063AMTR-E1

Name: AZ34063AMTR-E1
Brand: Diodes Incorporated
SKU: AZ34063AMTR-E1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AZ34063AMTR-E1

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AZ34063AMTR-E1.pdf

Description:: IC REG BUCK BOOST ADJ 1.5A 8SOIC

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Product details

Overview

AZ34063AMTR-E1 from Diodes Incorporated is a monolithic DC-DC converter controller IC supporting step-down, step-up, and inverting topologies with 3.0–36 V input range, 1.5 A internal switch current capability, and adjustable output voltage via external resistor divider. It integrates temperature-compensated 1.25 V reference (±2%), current-limit sensing, oscillator with timing capacitor control, and Darlington/forced-beta output driver-used in battery chargers, ADSL modems, and negative voltage supplies.

For engineers reviewing the AZ34063AMTR-E1 datasheet, AZ34063AMTR-E1 pinout, AZ34063AMTR-E1 application, or AZ34063AMTR-E1 equivalent, key selection criteria include peak switch current rating (1.5 A), reference accuracy (±2%), oscillator frequency range (up to 180 kHz), thermal limits for SOIC-8 package (RθJA = 160 °C/W), and compatibility with standard 1N5819 diode and 100–150 µH inductors in typical configurations.

Technical Context

The AZ34063AMTR-E1 implements a fixed-frequency current-mode control architecture using an internal oscillator whose frequency is set by an external timing capacitor (CT) and discharge-to-charge current ratio (5.2–7.5×). Its comparator compares feedback voltage at Pin 5 against a precision 1.25 V reference to regulate output voltage across all three topologies.

Current limiting operates via peak-sense voltage detection at Pin 7 (VIPK = 250–350 mV), triggering shutdown when external sense resistor voltage exceeds threshold. The internal switch uses a Darlington-connected NPN transistor (Pin 1 collector, Pin 2 emitter, Pin 8 driver collector) with saturation voltage of 1.0–1.3 V at 1.0 A (Darlington mode) or 0.45–0.7 V under forced β = 20.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	3.0 V to 36 V - supports wide-input industrial and automotive battery systems without pre-regulation
Output Switch Current	1.5 A - enables up to ~500 mA output in step-down or ~175 mA in step-up with standard external components
Reference Voltage	1.25 V ±2% - sets output regulation accuracy; used with R1/R2 divider to determine VOUT = 1.25 × (R1+R2)/R2
Oscillator Frequency	Up to 180 kHz - determined by CT value; 470 pF yields ~38 kHz, enabling compact magnetics and low EMI
Current Limit Threshold	300 mV typical at Pin 7 - defines maximum switch current via R_SC = 0.3 V / I_PK, e.g., 0.22 Ω for 1.36 A limit
Supply Current	4 mA max - low quiescent draw supports battery-powered standby operation
Operating Temperature	−40 °C to +85 °C - qualified for industrial ambient conditions

Pinout & Package

AZ34063AMTR-E1 is supplied in SOIC-8 package (RoHS-compliant, green, tape-and-reel), with 1.27 mm pitch, 4.9 mm × 3.9 mm body, and thermal resistance RθJA = 160 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (SWC)	Switch Collector	High-side collector of internal Darlington NPN; connects to inductor/diode node in all topologies
2 (SWE)	Switch Emitter	Emitting terminal of internal switch; tied to ground in step-down, to input in step-up/inverting
3 (CT)	Timing Capacitor	Connects external capacitor to set oscillator frequency; discharge/charge currents define f_OSC
4 (GND)	Ground Reference	Common return for internal bias, comparator, and oscillator circuits
5 (COMP)	Comparator Inverting Input	Feedback node for output regulation; compares against 1.25 V reference
6 (VCC)	Power Supply Input	Primary supply pin; powers internal circuitry; must be bypassed with ≥100 µF capacitor
7 (IPK)	Peak Current Sense	Monitors voltage drop across external R_SC to terminate switch conduction on overcurrent
8 (DRV)	Driver Collector	Collector of driver transistor; used in non-Darlington mode with external base resistor for forced β

Key Features

Feature	Design Value
Adjustable Output Topology	Supports step-down, step-up, and inverting configurations using same IC and shared external component types (inductor, diode, capacitors)
Integrated Current Limiting	Hardware-based peak-current protection via Pin 7 sensing eliminates need for external current-sense amplifier or controller logic
Precision Internal Reference	1.25 V ±2% bandgap reference enables stable output regulation across temperature and line variations without trimming
Low Standby Current	≤4 mA supply current allows use in always-on systems where power budget is constrained
Dual Output Drive Options	Darlington mode (Pins 1/2/8 connected) for high-current switching or common-emitter mode (Pin 8 driven externally) for faster turn-off at lower currents

Applications

Battery Chargers

ADSL Modems

Use Scenario: Charging single-cell Li-ion or multi-cell NiMH batteries from variable wall adapters or USB sources.

IC Role / Device Role / Timing Role: Step-down controller regulating constant-current/constant-voltage charge profile with external MOSFET or diode-based rectification.

Use Value: Enables compact, low-BOM-count charger design with 1.5 A switch current supporting up to 500 mA charge current at 4.2 V.

Use Scenario: Generating isolated ±12 V rails for line-driver ICs and analog front-end circuitry in DSL transceivers.

IC Role / Device Role / Timing Role: Inverting converter producing negative supply from +5 V or +12 V main rail using standard 1N5819 Schottky diode and 88 µH inductor.

Use Value: Delivers −12 V/100 mA with <1.5% reference drift over temperature, eliminating need for separate negative regulator IC.

Hubs

Negative Voltage Power Supplies

Use Scenario: Providing regulated 3.3 V or 5 V auxiliary power to USB hub controllers and port-power switches from 12 V input.

IC Role / Device Role / Timing Role: Step-down controller operating at 38 kHz (CT = 470 pF) to minimize EMI near high-speed USB data lines.

Use Value: Achieves >85% efficiency at 500 mA load with SOIC-8 thermal performance suitable for enclosed plastic housings.

Use Scenario: Generating −5 V or −15 V for op-amp biasing, sensor excitation, or RS-232 level-shifting in instrumentation systems.

IC Role / Device Role / Timing Role: Inverting topology with resistor-divider feedback referenced to output ground, enabling precise negative rail regulation.

Use Value: Uses same layout footprint and BOM as positive regulators-reducing design time and PCB layer count for dual-rail systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar DC-DC controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC34063AP1G	Same functional architecture but rated for −40°C to +105°C; higher max V_CC (40 V); identical pinout and reference (1.25 V)	Qualified for extended-temperature industrial and automotive under-hood use; requires revalidation of timing capacitor value for f_OSC	Select when operating above +85°C ambient or requiring PPAP-capable sourcing
LM2574N-5.0	Fixed 5.0 V output; no external feedback; integrated 52 kHz oscillator; 0.5 A switch current; different pinout and topology support (step-down only)	Limited to fixed-output step-down; eliminates R1/R2 divider but lacks inverting/step-up capability	Select only for simple 5 V step-down where topology flexibility and adjustable output are unnecessary

Compared with MC34063AP1G and LM2574N-5.0, AZ34063AMTR-E1 provides full topology flexibility and 1.5 A switch current in SOIC-8, while MC34063AP1G extends temperature range and LM2574N-5.0 trades adjustability for integration and lower cost in fixed-output applications.

Availability

AZ34063AMTR-E1 is available at Aetrix Electronics and suitable for battery chargers, ADSL modems, and USB hubs requiring stable component supply despite its obsolete status-stock is verified and fully traceable with remaining factory inventory.

Supply support for AZ34063AMTR-E1 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

AZ34063AMTR-E1 belongs to Diodes' legacy DC-DC controller product line, designed for cost-sensitive, topology-flexible power conversion in space-constrained applications where external component count and board area are critical.

FAQ

What is the maximum achievable output current using AZ34063AMTR-E1 in step-down configuration?

The internal switch supports 1.5 A peak current, but practical continuous output depends on thermal limits and external components. In SOIC-8 package at +85°C ambient, typical step-down designs deliver 400–500 mA at 5 V output using 220 µH inductor, 1N5819 diode, and proper PCB copper area. Higher current requires heatsinking or forced-air cooling.

Can AZ34063AMTR-E1 be used in synchronous rectification designs?

No-AZ34063AMTR-E1 drives only a single NPN switch and lacks gate-drive outputs or timing control for external MOSFETs. It is designed for diode-based rectification (e.g., 1N5819) in all topologies. Synchronous operation requires dedicated controllers like the AP34063A or modern current-mode ICs with dual gate drivers.

Why does the datasheet list AZ34063A as obsolete, and is it still reliable for new designs?

Diodes discontinued AZ34063A due to migration toward enhanced versions (e.g., AP34063A) with improved ESD rating and tighter reference tolerance. However, AZ34063AMTR-E1 remains fully functional, with documented performance across −40°C to +85°C and long-term reliability validated in fielded equipment since 2000s.

How do I calculate the timing capacitor value for a target switching frequency?

Use the empirical formula f_OSC ≈ 1 / (2.3 × R_CT × C_CT), where R_CT = 1.8 kΩ (internal) and C_CT is the external capacitor. For 50 kHz, C_CT ≈ 430 pF; for 100 kHz, ≈ 220 pF. Confirm with oscilloscope measurement at Pin 3, as actual frequency varies ±20% with temperature and supply voltage.

AZ34063AMTR-E1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Up, Step-Down

Output Configuration:: Positive or Negative

Topology:: Buck, Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 3V

Voltage - Input (Max):: 36V

Voltage - Output (Min/Fixed):: 1.25V

Voltage - Output (Max):: 36V

Current - Output:: 1.5A (Switch)

Frequency - Switching:: Up to 180kHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AZ34063AMTR-E1 FAQ

1.How can I place an order for AZ34063AMTR-E1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AZ34063AMTR-E1 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 AZ34063AMTR-E1 reliable?

The price and inventory of AZ34063AMTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ34063AMTR-E1 is usually 5 days.

3.What payment methods are accepted for AZ34063AMTR-E1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ34063AMTR-E1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AZ34063AMTR-E1?

AZ34063AMTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AZ34063AMTR-E1 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 AZ34063AMTR-E1?

For technical support, including AZ34063AMTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ34063AMTR-E1 requirements.

6.How does Aetrix verify that AZ34063AMTR-E1 is sourced from the original manufacturer or authorized distributors?

All AZ34063AMTR-E1 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 AZ34063AMTR-E1 meets industry standards.

7.What is the process for return or replacement of AZ34063AMTR-E1?

All AZ34063AMTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ34063AMTR-E1, 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 AZ34063AMTR-E1 part is unused and in its original packaging.

Return procedure for AZ34063AMTR-E1:

1.Submit a request within 90 days.

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

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