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Diodes Incorporated AZ34063UP-G1
- Part No.:
- AZ34063UP-G1
- Manufacturer:
- Diodes Incorporated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AZ34063UP-G1.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
AZ34063UP-G1 from Diodes Incorporated is a monolithic DC-DC converter controller IC supporting step-down, step-up, and inverting topologies with 3.0–36V input range, 1.5A internal switch current capability, 1.25V ±2% precision reference, up to 180kHz switching frequency, and SO-8/PDIP-8 packaging - deployed in battery chargers and negative voltage supplies.
For engineers reviewing the AZ34063UP-G1 datasheet, AZ34063UP-G1 pinout, AZ34063UP-G1 application, or AZ34063UP-G1 equivalent, key selection criteria include peak current limit threshold (300mV typ), oscillator timing capacitor dependency (e.g., 470pF for ~100kHz), Darlington vs. common-emitter output configuration trade-offs, and thermal derating in PDIP-8 (1.25W @ +25°C).
Technical Context
The AZ34063UP-G1 integrates a temperature-compensated 1.25V reference, comparator with inverting input at Pin 5, oscillator driven by external CT capacitor (Pin 3), and a high-current Darlington-connected switch (Pins 1/2/8) with active current limiting via IPK sense (Pin 7). It operates without external clock synchronization and requires no external driver circuitry.
Its control architecture uses fixed-frequency, current-mode operation: the oscillator sets switching period, while the comparator compares feedback voltage against the 1.25V reference to adjust duty cycle. Peak current limiting is implemented by comparing voltage across an external sense resistor (Rsc) to the 300mV threshold at Pin 7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 36V - supports wide-input industrial and automotive battery systems without pre-regulation. |
| Output Switch Current | 1.5A - enables direct drive of power inductors in ≤500mA step-down or ≤175mA step-up designs with margin. |
| Reference Voltage | 1.25V ±2% - sets output regulation accuracy; used with R1/R2 divider to program VOUT = 1.25×(1+R1/R2). |
| Oscillator Frequency | Up to 180kHz - determined by CT capacitor value; 470pF yields ~100kHz, balancing efficiency and EMI. |
| Current Limit Threshold | 300mV typ at Pin 7 - defines maximum switch peak current as IPK = 0.3V / Rsc, enabling precise overcurrent protection. |
| Supply Current | 4mA max - ensures low quiescent power in battery-powered standby modes. |
| Operating Temperature | -40°C to +85°C - qualified for industrial ambient environments without derating. |
Pinout & Package
Available in PDIP-8 (through-hole) and SO-8 (surface-mount) packages. The AZ34063UP-G1 variant is packaged in PDIP-8 per ordering information.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Switch Collector) | Internal switch transistor collector | High-side connection point for external inductor in step-down; low-side return in step-up/inverting. |
| 2 (Switch Emitter) | Internal switch transistor emitter | Emitter node tied to GND in standard configurations; forms Darlington pair with Pin 8 driver. |
| 3 (Timing Capacitor) | Oscillator timing node | Connects external capacitor (CT) to set switching frequency; discharge current ratio fixes fOSC ≈ 1/(CT × 1.1µs/V). |
| 4 (GND) | Ground reference | Common return for internal bias, comparator, and oscillator circuits; must be low-impedance. |
| 5 (Comparator Inverting Input) | Feedback voltage input | Compares resistor-divider output against 1.25V reference to regulate VOUT. |
| 6 (VCC) | Power supply input | Supplies internal circuitry; bypass with ≥100µF capacitor near pin to suppress ripple-induced instability. |
| 7 (IPK Sense) | Peak current limit monitor | Senses voltage drop across external Rsc; triggers shutdown when ≥300mV to protect switch and inductor. |
| 8 (Driver Collector) | Driver transistor collector | Connected to Pin 1 in Darlington mode; provides base drive to main switch for low saturation voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | Programmed via external R1/R2 divider referenced to 1.25V; supports fixed or variable outputs without trimming. |
| Integrated 1.5A switch | Eliminates need for external MOSFET or BJT in low-to-mid power converters (<5W), reducing BOM count and layout area. |
| Low standby current | ≤4mA supply current enables use in energy-sensitive applications like portable battery chargers. |
| Thermal protection ready | Junction temperature limit of +150°C allows safe operation under transient overload before shutdown. |
| RoHS/Green compliant | Fully lead-free, halogen- and antimony-free construction meets global environmental compliance requirements. |
Applications
| Battery Chargers | ADSL Modems |
|---|---|
|
Use Scenario: Charging Li-ion or NiMH batteries from unregulated wall adapters or USB ports. IC Role / Device Role / Timing Role: Step-down controller regulating constant-current/constant-voltage charge profile using feedback from current-sense and voltage-divider networks. Use Value: Enables compact, low-cost charger design with integrated switch and current limiting - no external FET or sense amplifier required. |
Use Scenario: Generating isolated -12V rail for line-driver ICs and analog front-end circuitry. IC Role / Device Role / Timing Role: Inverting converter topology producing negative output from positive input, regulated via Pin 5 feedback loop. Use Value: Delivers stable -12V/100mA with single IC and minimal passives - avoids need for dual-output transformer or charge-pump IC. |
| Hubs | Negative Voltage Power Supplies |
|
Use Scenario: Providing auxiliary 5V or 3.3V rails from 12V bus in USB or Ethernet hubs. IC Role / Device Role / Timing Role: Step-down regulator controlling duty cycle based on load-transient response and 1.25V reference accuracy. Use Value: Maintains tight output regulation (±2% ref tolerance) across input variations and load steps up to 500mA. |
Use Scenario: Generating clean -5V or -15V for op-amp biasing, sensor excitation, or RS-232 level-shifting. IC Role / Device Role / Timing Role: Voltage-inverting DC-DC controller using coupled inductor and synchronous rectification via external diode. Use Value: Achieves >75% efficiency at 100mA load with low EMI due to fixed-frequency operation and integrated current limiting. |
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 pinout and core architecture; 1.25V reference tolerance ±2.4%, higher typical supply current (5mA). | Compatible in legacy designs but less accurate reference affects output stability under line/load variation. | Select when second-source availability is critical and ±2.4% reference tolerance is acceptable. |
| LM2574N-5.0 | Fixed 5V output, no external feedback; 0.5A switch current; requires fewer external components. | Limited to fixed-output applications; cannot support adjustable or negative outputs without additional circuitry. | Choose only for simple 5V step-down where programmability and topology flexibility are unnecessary. |
Compared with MC34063AP1G and LM2574N-5.0, the AZ34063UP-G1 offers superior reference accuracy and full topology flexibility (buck/boost/invert), making it optimal for multi-rail or precision-adjustable designs despite its EOL status.
Availability
AZ34063UP-G1 is available at Aetrix Electronics and suitable for battery chargers, ADSL modems, and negative voltage power supplies requiring stable component supply during legacy system maintenance and repair cycles.
Supply support for AZ34063UP-G1 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 communications markets.
The AZ34063U product line delivers cost-optimized, topology-flexible DC-DC controller ICs targeting applications where integration, reliability, and RoHS compliance outweigh the need for synchronous rectification or ultra-low IQ.
FAQ
What is the recommended minimum timing capacitor value for stable operation?
The datasheet specifies CT values down to 100pF for frequencies up to 180kHz. For reliable startup and noise immunity, Diodes recommends ≥330pF (e.g., 470pF) to ensure sufficient oscillator charge/discharge margin across temperature and process variation. Lower values may cause jitter or failure to initiate oscillation at cold temperatures.
Can AZ34063UP-G1 drive a synchronous rectifier?
No - the AZ34063UP-G1 lacks complementary gate-drive outputs or dead-time control required for synchronous rectification. It is designed for use with external Schottky diodes (e.g., 1N5819) in step-up and inverting configurations. Attempting to replace the diode with an actively switched MOSFET risks shoot-through and instability.
How does the Darlington configuration affect saturation voltage?
In Darlington mode (Pins 1 and 8 connected), VCE(sat) is typically 1.0V at 1.0A, enabling robust conduction but increasing conduction loss. In forced-β common-emitter mode (Pin 8 driven separately), VCE(sat) drops to 0.45V, improving efficiency at lower currents - though requiring careful driver design to avoid saturation delay.
Is AZ34063UP-G1 qualified for automotive applications?
No - the AZ34063UP-G1 is rated for industrial temperature range (-40°C to +85°C) and is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AZ34063Q series) with PPAP support, IATF 16949 manufacturing, and extended qualification testing - these must be specified separately for automotive use.
AZ34063UP-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AZ34063UP-G1 FAQ
1.How can I place an order for AZ34063UP-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ34063UP-G1 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 AZ34063UP-G1 reliable?
The price and inventory of AZ34063UP-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ34063UP-G1 is usually 5 days.
3.What payment methods are accepted for AZ34063UP-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ34063UP-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ34063UP-G1?
AZ34063UP-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ34063UP-G1 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 AZ34063UP-G1?
For technical support, including AZ34063UP-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ34063UP-G1 requirements.
6.How does Aetrix verify that AZ34063UP-G1 is sourced from the original manufacturer or authorized distributors?
All AZ34063UP-G1 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 AZ34063UP-G1 meets industry standards.
7.What is the process for return or replacement of AZ34063UP-G1?
All AZ34063UP-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ34063UP-G1, 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 AZ34063UP-G1 part is unused and in its original packaging.
Return procedure for AZ34063UP-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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