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Analog Devices Inc./Maxim Integrated MAX8515EXK-T
- Part No.:
- MAX8515EXK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX8515EXK-T.pdf
- Description:
- IC VREF SHUNT ADJ 1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
MAX8515EXK-T from Maxim Integrated is a precision 0.6V adjustable shunt regulator designed for feedback control in isolated DC-to-DC converters, featuring ±1% initial accuracy at +25°C, 20mA output sink capability down to 0.2V output voltage, and operation across 1.7V–28V input supply range. It enables high-bandwidth regulation in telecom base station power supplies and low-dropout linear regulators using external NPN transistors.
For engineers reviewing the MAX8515EXK-T datasheet, MAX8515EXK-T pinout, MAX8515EXK-T application, or MAX8515EXK-T equivalent, this device serves as a compact, temperature-stable voltage reference with optocoupler-compatible drive strength and dynamic output impedance of 0.2Ω - critical for stable closed-loop isolation feedback design.
Technical Context
The MAX8515EXK-T implements a precision 600mV bandgap reference comparator driving a shunt output stage, with FB input referenced to GND and OUT capable of sinking up to 20mA while maintaining regulation from 0.2V to 18V. Its separated supply (IN) and feedback (FB) paths enable direct connection to secondary-side outputs or independent biasing from primary-side rails.
With 0.2Ω dynamic output impedance and open-loop bandwidth supporting high-frequency compensation, the device delivers tight load regulation (<0.6% change over 20mA) and line regulation (<1.5mV over 1.7V–28V), making it suitable for fast transient response in isolated flyback and forward converter topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 0.6V ±1% at +25°C - sets precise feedback threshold for output voltage programming via resistor divider. |
| Output Sink Current | 20mA minimum at VOUT = 0.2V - supports robust optocoupler LED drive and stable loop gain in isolation circuits. |
| Input Supply Range | 1.7V to 28V - allows flexible biasing from either primary-side unregulated rail or secondary-side regulated output. |
| Dynamic Output Impedance | 0.2Ω typical below 1kHz - minimizes output voltage perturbation under fast load transients in feedback path. |
| Temperature Range | -40°C to +85°C - qualified for industrial and telecom power supply environments without derating. |
| FB Input Bias Current | ±0.1µA max - ensures negligible current error in high-impedance feedback dividers, preserving accuracy. |
| Supply Current | 2.5mA to 4mA - enables low-quiescent-power operation in energy-sensitive isolated bias networks. |
Pinout & Package
MAX8515EXK-T is housed in a 5-pin SC70-5 package (2.0mm × 2.1mm), optimized for space-constrained secondary-side PCB layouts in isolated DC-DC modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - PGND | Power Ground | Low-impedance return path for output current; must be tied directly to GND to minimize ground bounce in shunt path. |
| 2 - GND | Analog Ground | Reference node for internal bandgap and comparator; co-located with PGND to avoid offset errors. |
| 3 - OUT | Shunt Output | Sinks up to 20mA to regulate FB voltage; requires 1µF ceramic capacitor to GND for stability at 0.6V output. |
| 4 - IN | Supply Input | Bias source for internal circuitry; accepts 1.7V–28V; decoupled with 0.1µF capacitor to GND. |
| 5 - FB | Feedback Input | High-impedance input referenced to GND; regulates when voltage exceeds 600mV; drives optocoupler LED anode. |
Key Features
| Feature | Design Value |
|---|---|
| 0.6V ±1% Initial Accuracy | Enables <1% output voltage tolerance in isolated converters without trimming, reducing BOM count and calibration cost. |
| 20mA Sink at 0.2V | Guarantees reliable optocoupler turn-on even during low-output-voltage startup or fault conditions in flyback designs. |
| 0.2Ω Dynamic Output Impedance | Provides >30dB rejection of high-frequency noise on the feedback path, improving PSRR and loop stability. |
| Direct Optocoupler Drive | Eliminates need for external transistor buffer in most isolated feedback circuits, simplifying layout and reducing component count. |
| Wide 1.7V–28V Input Range | Supports single-part design across multiple input rails (e.g., 3.3V, 12V, 24V primary bias) without redesign. |
Applications
| Isolated Telecom Power Supply | Optically Isolated Flyback Converter |
|---|---|
Use Scenario: Secondary-side voltage sensing in 48V-input telecom rectifiers delivering 3.3V/5V/12V outputs with strict ±1% regulation. IC Role / Device Role / Timing Role: Shunt regulator providing precision 0.6V reference to optocoupler LED, closing feedback loop across transformer barrier. Use Value: Enables stable regulation under wide line/load transients while maintaining compliance with GR-1089 immunity requirements. |
Use Scenario: Feedback control in cost-sensitive AC-DC adapters for consumer electronics with 5W–25W output. IC Role / Device Role / Timing Role: Adjustable voltage reference setting output via R1/R2 divider; drives PC817-type optocoupler directly. Use Value: Reduces component count by eliminating external bias transistor and improves transient response via low-Z output stage. |
| Industrial DC-DC Module | Programmable Low-Dropout Linear Regulator |
Use Scenario: Output voltage monitoring in DIN-rail mounted 24V-to-5V isolated modules used in PLC I/O systems. IC Role / Device Role / Timing Role: Precision shunt element in secondary-side regulation loop, interfacing with TL431-replacement architecture. Use Value: Delivers ±1.8% accuracy over -40°C to +85°C, meeting EN 61000-6-2 conducted immunity and thermal drift specs. |
Use Scenario: Building a 1A, 1.0V LDO using FZT1049A NPN pass transistor and MAX8515EXK-T as error amplifier/reference. IC Role / Device Role / Timing Role: Reference and error comparator driving external pass device; sets VOUT = 0.6V × (1 + R3/R4). Use Value: Achieves <50mV load regulation at 1A with no overcurrent/thermal protection - ideal for non-safety-critical embedded rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | 2.495V fixed reference; ±0.5% initial accuracy; requires external resistor divider to scale down to 0.6V. | Lacks native 0.6V reference; introduces additional divider error and sensitivity to resistor tolerance/temperature drift. | Choose when existing designs use TL431 footprint and higher reference voltage is acceptable with scaling. |
| MAX8515AEXK-T | 0.6V ±0.5% initial accuracy at +25°C; tighter tempco (±1% over -40°C to +85°C vs. ±1.8% for MAX8515EXK-T). | Higher accuracy enables tighter output regulation in premium telecom or test equipment where <1% total error budget is required. | Choose when system-level accuracy demands exceed ±1% or when operating near temperature extremes. |
Compared with TL431ACDBVR, MAX8515EXK-T eliminates external scaling resistors and delivers lower output impedance at 0.6V; compared with MAX8515AEXK-T, it trades 0.5% initial accuracy for cost-sensitive applications where ±1% meets spec.
Availability
MAX8515EXK-T is available at Aetrix Electronics and suitable for isolated DC-to-DC converters, telecom power supplies, and programmable linear regulators requiring stable component supply, consistent parametric performance, and long-term industrial temperature support.
Supply support for MAX8515EXK-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 and mixed-signal ICs for power management, sensing, and interface applications in industrial, telecom, and computing systems.
The MAX8515 family targets isolated power conversion feedback loops, delivering ultra-low-voltage shunt regulation with minimal external components and high noise immunity for next-generation DC-DC modules.
FAQ
What is the reference voltage accuracy of MAX8515EXK-T over temperature?
The MAX8515EXK-T provides 0.6V ±1% initial accuracy at +25°C and ±1.8% accuracy across the full -40°C to +85°C operating range. This specification is guaranteed by design and verified through production testing at +25°C, with temperature limits confirmed by characterization data in the official datasheet.
Can MAX8515EXK-T directly drive common optocouplers like PC817 or SFH615A?
Yes, MAX8515EXK-T is explicitly designed to directly drive standard optocoupler LEDs without external buffering. Its 20mA sink capability at low voltages (down to 0.2V) ensures reliable turn-on of PC817, SFH615A, and similar devices, as confirmed in the Typical Operating Circuit (Figure 1) and Applications Information section of the datasheet.
What is the recommended output capacitor for MAX8515EXK-T when configured for 0.6V output?
When configured as a 0.6V shunt regulator (FB tied to OUT), the MAX8515EXK-T requires a 1.0µF ceramic capacitor from OUT to GND for stability, as specified in the Applications Information section and shown in Figure 1 of the datasheet. Smaller values may compromise phase margin in feedback loops.
How does the dynamic output impedance of MAX8515EXK-T affect loop stability in isolated converters?
The MAX8515EXK-T's 0.2Ω dynamic output impedance (measured below 1kHz) significantly reduces sensitivity to high-frequency noise on the feedback path, improving PSRR and enabling tighter compensation in opto-isolated loops. This value is measured and documented in the Electrical Characteristics table and supports >30dB noise rejection in typical telecom power supply designs.
What is the maximum continuous output current supported by MAX8515EXK-T?
The MAX8515EXK-T is rated to sink up to 20mA continuously when VOUT is as low as 0.2V, as specified in the Electrical Characteristics table under "Maximum Output Current". This rating holds across the full -40°C to +85°C temperature range and is validated with VIN = 2V and VFB = 0.63V.
MAX8515EXK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- ±1%
- 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:
- SC-70-5
MAX8515EXK-T FAQ
1.How can I place an order for MAX8515EXK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8515EXK-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 MAX8515EXK-T reliable?
The price and inventory of MAX8515EXK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8515EXK-T is usually 5 days.
3.What payment methods are accepted for MAX8515EXK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8515EXK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8515EXK-T?
MAX8515EXK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8515EXK-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 MAX8515EXK-T?
For technical support, including MAX8515EXK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8515EXK-T requirements.
6.How does Aetrix verify that MAX8515EXK-T is sourced from the original manufacturer or authorized distributors?
All MAX8515EXK-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 MAX8515EXK-T meets industry standards.
7.What is the process for return or replacement of MAX8515EXK-T?
All MAX8515EXK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8515EXK-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 MAX8515EXK-T part is unused and in its original packaging.
Return procedure for MAX8515EXK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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