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Analog Devices Inc./Maxim Integrated MAX8515AEZK-T
- Part No.:
- MAX8515AEZK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MAX8515AEZK-T.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,230
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Product details
Overview
MAX8515AEZK-T from Maxim Integrated is a precision 0.6V adjustable shunt regulator designed for feedback control in isolated DC-to-DC converters, featuring ±0.5% initial accuracy at +25°C, 0.2Ω dynamic output impedance, and 20mA sink capability down to 0.2V output voltage - enabling high-bandwidth regulation in telecom base station power supplies.
For engineers reviewing the MAX8515AEZK-T datasheet, MAX8515AEZK-T pinout, MAX8515AEZK-T application, or MAX8515AEZK-T equivalent, this device serves as a low-voltage, high-accuracy shunt reference with optocoupler-compatible drive strength, wide 1.7V–28V input range, and -40°C to +85°C operation - critical for evaluating feedback stability, OVP threshold setting, and isolated converter loop compensation.
Technical Context
The MAX8515AEZK-T implements a precision 600mV bandgap reference with comparator-based shunt control logic, separating supply (IN/PGND) and feedback (FB) paths to support galvanic isolation. Its open-loop bandwidth supports high-frequency compensation in flyback and forward converters.
It operates in two bias modes: directly from the converter output (1.8V–18V) or from an independent 1.7V–28V supply, while maintaining regulation down to 0.2V at the OUT terminal - enabling use in ultra-low-voltage secondary-side sensing and overvoltage protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 0.6V ±0.5% at +25°C - sets precise feedback threshold for isolated output regulation |
| Temperature Accuracy | ±1% over -40°C to +85°C - ensures stable regulation across industrial temperature range |
| Output Sink Current | 20mA minimum at VOUT = 0.2V - drives standard optocoupler LEDs without external amplification |
| Dynamic Output Impedance | 0.2Ω - minimizes output voltage perturbation under fast load transients |
| Input Voltage Range | 1.7V to 28V - supports biasing from auxiliary rails or direct converter output |
| FB Input Bias Current | ±0.1µA max - enables high-resistance feedback dividers without accuracy degradation |
| Supply Current | 2.5mA to 4mA - low quiescent draw preserves efficiency in standby and light-load conditions |
Pinout & Package
MAX8515AEZK-T is housed in a 5-pin Thin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), optimized for space-constrained secondary-side PCB layouts in isolated power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Low-impedance return path for OUT current; must be tied to GND to ensure proper thermal and noise performance |
| 2 - GND | Analog Ground | Reference node for internal bandgap and comparator; shares connection with PGND but requires clean local decoupling |
| 3 - OUT | Shunt Output | Sinks up to 20mA to regulate voltage; connects to cathode of optocoupler LED or external pass transistor base |
| 4 - IN | Supply Input | Accepts 1.7V–28V bias rail; powers internal circuitry independently of FB/OUT nodes |
| 5 - FB | Feedback Input | Compares external divider voltage to 0.6V reference; regulates OUT to maintain 0.6V at this pin |
Key Features
| Feature | Design Value |
|---|---|
| 0.6V Precision Reference | Enables accurate output regulation down to sub-1V levels in isolated converters without trimming |
| Direct Optocoupler Drive | 20mA sink capability eliminates need for external transistor buffer in typical feedback loops |
| Wide Input Supply Range | 1.7V–28V operation allows flexible biasing from auxiliary windings or primary-side rails |
| Low Dynamic Output Impedance | 0.2Ω ensures minimal output voltage deviation during fast transient events in closed-loop systems |
| Thin SOT23-5 Packaging | Reduces footprint by >30% vs. standard SOT23, critical for dense secondary-side power board layouts |
Applications
| Isolated Telecom DC-DC Converter | Base Station Power Module |
|---|---|
Use Scenario: Secondary-side voltage feedback in 48V-input, 3.3V/12V-output flyback converters for LTE remote radio units. IC Role / Device Role / Timing Role: Shunt regulator providing isolated feedback signal to primary-side PWM controller via optocoupler. Use Value: ±0.5% initial accuracy maintains tight output tolerance across temperature, reducing need for post-production calibration. |
Use Scenario: Output voltage monitoring and overvoltage protection in distributed power architecture (DPA) modules. IC Role / Device Role / Timing Role: Dual-function device acting as both regulation reference and OVP trigger using same FB/OUT interface. Use Value: 20mA sink at 0.2V enables reliable OVP activation even during brownout conditions on the secondary rail. |
| Low-Dropout Linear Regulator | Adjustable Voltage Reference |
Use Scenario: Low-noise 1.0V linear regulator for FPGA core supplies, built with external NPN pass transistor. IC Role / Device Role / Timing Role: Precision 0.6V reference and error amplifier driving base of external pass transistor. Use Value: 0.2Ω dynamic impedance improves load transient response versus discrete Zener-based references. |
Use Scenario: Programmable 0.6V–18V reference source for ADC biasing and sensor excitation in industrial I/O modules. IC Role / Device Role / Timing Role: Adjustable shunt reference with high-impedance FB input enabling resistor-divider programming. Use Value: ±0.1µA FB bias current allows use of >1MΩ divider resistors, minimizing power loss and self-heating errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431ACDBVR | 2.5V fixed reference; ±0.5% initial accuracy; 100mA sink; no 0.6V option | Requires level-shifting for sub-1V regulation; higher VREF limits low-voltage converter use | Select when 2.5V reference suffices and higher sink current is needed for long-coupler strings |
| LM4040CIM3-ADJ | Adjustable 1.24V–10V reference; ±0.5% accuracy; 15mA sink; no integrated shunt driver | Lacks dedicated OUT stage - needs external transistor for optocoupler drive; higher minimum VREF | Choose for non-isolated, higher-voltage reference needs where external buffering is acceptable |
Compared with TLV431ACDBVR and LM4040CIM3-ADJ, the MAX8515AEZK-T uniquely delivers 0.6V regulation with integrated 20mA sink and dual-supply biasing - making it the only option among the three capable of direct secondary-side implementation in <1V isolated converters without level translation or external drive stages.
Availability
MAX8515AEZK-T is available at Aetrix Electronics and suitable for isolated DC-to-DC converters, telecom power modules, and low-dropout linear regulators requiring stable component supply, consistent parametric performance, and long-term industrial temperature support.
Supply support for MAX8515AEZK-T 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and computing applications.
The MAX8515A/MAX8515 product line targets isolated power supply feedback systems, delivering low-voltage shunt regulation with high accuracy and optocoupler drive capability - specifically engineered for next-generation telecom and base station power architectures.
FAQ
What is the reference voltage accuracy of the MAX8515AEZK-T over temperature?
The MAX8515AEZK-T provides ±0.5% initial accuracy at +25°C and maintains ±1% accuracy across the full -40°C to +85°C operating range. This is confirmed in the Electrical Characteristics table under "FB Threshold Accuracy" for the MAX8515AE_K variant, which corresponds to the MAX8515AEZK-T's marking code ADRK and SC70/SOT23 packaging.
Can the MAX8515AEZK-T operate with output voltages below 1V?
Yes - the MAX8515AEZK-T regulates precisely at 0.6V and can sink 20mA even when VOUT is as low as 0.2V. Its architecture allows direct use in sub-1V isolated converter outputs, unlike most shunt regulators limited to ≥1.2V references. This capability is explicitly verified in the "OUT Voltage Range" and "Maximum Output Current" specifications.
What is the purpose of separate PGND and GND pins on the MAX8515AEZK-T?
The MAX8515AEZK-T separates PGND (Pin 1) and GND (Pin 2) to isolate high-current shunt return paths from sensitive analog reference circuitry. PGND carries the full 20mA OUT current, while GND serves as the quiet reference for the internal 0.6V bandgap and FB comparator. Both pins must be connected together externally, but routing them separately on PCB reduces noise coupling into the feedback path.
Does the MAX8515AEZK-T support overvoltage protection (OVP) functionality?
Yes - while the MAX8515AEZK-T is primarily a precision shunt regulator, its architecture supports OVP when configured with external resistors (R3/R4) on the FB pin. The datasheet provides a dedicated OVP circuit (Figure 4) where the device triggers at a user-defined threshold above nominal output, leveraging the same 0.6V reference and high-accuracy FB input.
What package type does the MAX8515AEZK-T use, and how does it differ from MAX8515AEXK-T?
The MAX8515AEZK-T uses a 5-pin Thin SOT23-5 package (2.9mm × 1.6mm), whereas the MAX8515AEXK-T uses the 5-pin SC70-5 package (2.0mm × 2.1mm). Both share identical electrical specs and pinout, but the Thin SOT23 offers greater thermal dissipation (727mW at +70°C vs. 246.9mW for SC70), making it preferred for higher-power shunt applications.
MAX8515AEZK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Adjustable
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18 V
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 4 mA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MAX8515AEZK-T FAQ
1.How can I place an order for MAX8515AEZK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8515AEZK-T 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 MAX8515AEZK-T reliable?
The price and inventory of MAX8515AEZK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8515AEZK-T is usually 5 days.
3.What payment methods are accepted for MAX8515AEZK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8515AEZK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8515AEZK-T?
MAX8515AEZK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8515AEZK-T 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 MAX8515AEZK-T?
For technical support, including MAX8515AEZK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8515AEZK-T requirements.
6.How does Aetrix verify that MAX8515AEZK-T is sourced from the original manufacturer or authorized distributors?
All MAX8515AEZK-T 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 MAX8515AEZK-T meets industry standards.
7.What is the process for return or replacement of MAX8515AEZK-T?
All MAX8515AEZK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8515AEZK-T, 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 MAX8515AEZK-T part is unused and in its original packaging.
Return procedure for MAX8515AEZK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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