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Analog Devices Inc./Maxim Integrated MAX6037AAUK33+T
- Part No.:
- MAX6037AAUK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037AAUK33+T.pdf
- Description:
- IC VREF SERIES 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
MAX6037AAUK33+T from Maxim Integrated is a low-dropout, micropower, fixed-output voltage reference delivering 3.300V with ±0.2% initial accuracy and 25ppm/°C max temperature coefficient. It operates from 3.5V to 5.5V supply, consumes ≤275µA quiescent current, supports ±5mA load current, and features active-low shutdown (≤500nA). It serves precision analog signal chains in battery-powered wireless LAN modules and portable medical sensors.
For engineers reviewing the MAX6037AAUK33+T datasheet, MAX6037AAUK33+T pinout, MAX6037AAUK33+T application, or MAX6037AAUK33+T equivalent, key selection criteria include output stability under capacitive loads (0.02–1µF), dropout voltage ≤100mV at 1mA, automotive-grade operation (−40°C to +125°C), and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6037AAUK33+T is a series-mode bandgap voltage reference with internal trimming for high initial accuracy and low thermal drift. Its shutdown circuitry uses an active-low logic input (VENL ≤0.8V) to disable the output and reduce supply current to sub-500nA, enabling ultra-low-power sleep modes in portable systems.
It maintains regulation across input voltages from 3.5V to 5.5V and delivers stable 3.300V output into capacitive loads up to 1µF without oscillation-critical for ADC reference rails and precision regulator feedback paths where noise and settling time directly impact measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.2% (±6.6mV) at +25°C - ensures direct compatibility with 3.3V logic and ADC reference inputs requiring tight absolute accuracy. |
| Tempco | 25ppm/°C max - limits output drift to ≤±990µV over −40°C to +125°C, meeting 16-bit ADC full-scale error budgets. |
| Quiescent Current | 275µA max - enables multi-year battery life in always-on sensor nodes powered by coin cells or Li-SOCl₂ batteries. |
| Dropout Voltage | 100mV max at 1mA load - allows operation from 3.4V input, supporting brownout resilience in 3.3V system rails. |
| Load Drive | ±5mA sourcing/sinking - drives ADC reference inputs, op-amp bias networks, and DAC feedback resistors without external buffers. |
| Capacitive Load Range | 0.02µF to 1µF - accommodates standard ceramic decoupling and low-ESR polymer caps without stability compensation. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive, industrial motor control, and outdoor IoT deployments. |
Pinout & Package
The MAX6037AAUK33+T is housed in a 5-pin SOT23-5 package (U5-2 code), with 1.3mm × 2.9mm footprint and 1.45mm height, optimized for high-density PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I.C.) | Internally connected | No external connection required; unused pin internally tied off for fixed-output variants like MAX6037AAUK33+T. |
| 2 (GND) | Ground reference | Primary return path for reference output and supply current; must be low-impedance to minimize noise coupling. |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.8V to disable output and reduce supply current to ≤500nA; tie to IN for always-on operation. |
| 4 (IN) | Supply voltage input | Accepts 3.5V–5.5V; requires 0.1µF ceramic bypass capacitor to GND close to pin for PSRR and transient immunity. |
| 5 (OUT) | Reference voltage output | Delivers regulated 3.300V; connect 0.02–1µF capacitor to GND for stability and low-noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V Output | Eliminates external resistor network, reducing BOM count and layout area versus adjustable references. |
| 25ppm/°C Tempco (A Grade) | Ensures <±1000µV total drift over full automotive temperature range-critical for factory-calibrated instruments. |
| Sub-500nA Shutdown Current | Extends battery life in wake-on-event architectures by >1000× versus active mode current. |
| Stable with 0.02µF Ceramic Cap | Enables use of small, low-cost X7R/X5R MLCCs without series resistance or ferrite beads. |
| SOT23-5 Automotive Qualification | Meets AEC-Q100 stress testing for reliability in harsh environments including thermal cycling and humidity exposure. |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC sampling at 1kSPS. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC conversion and op-amp signal conditioning. Use Value: ±0.2% initial accuracy and 25ppm/°C tempco ensure <±1 LSB error over temperature, preserving diagnostic resolution. | Use Scenario: 2.4GHz Wi-Fi module with integrated RF transceiver and baseband processor. IC Role / Device Role / Timing Role: Supplies precise 3.3V reference to RF power amplifier biasing and analog front-end calibration circuits. Use Value: Low 275µA quiescent current extends runtime during deep-sleep states; 0.02–1µF capacitive load tolerance simplifies PCB decoupling. |
| Precision Industrial Regulators | Automotive Cabin Control Units |
Use Scenario: Programmable 3.3V LDO controller in PLC I/O module with isolated analog inputs. IC Role / Device Role / Timing Role: Reference for DAC-based setpoint generation and current-loop transmitter feedback. Use Value: ±5mA drive capability eliminates need for external buffer; 100mV dropout enables operation from marginally regulated 3.4V rails. | Use Scenario: HVAC control panel with touch interface and ambient temperature/humidity sensing. IC Role / Device Role / Timing Role: Supplies reference voltage to microcontroller ADC and sensor signal conditioners operating across −40°C to +125°C. Use Value: AEC-Q100 qualified SOT23-5 package and automotive temp range ensure long-term reliability in dashboard electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3333AIDBVR | 3.3V output, ±0.2% accuracy, 30ppm/°C tempco, 250µA IQ, SOT23-5 package | Higher tempco (30ppm/°C vs. 25ppm/°C); no shutdown function | Select when shutdown is unnecessary and slightly relaxed drift budget is acceptable. |
| ADR3433ARJZ-R7 | 3.3V output, ±0.1% accuracy, 10ppm/°C tempco, 120µA IQ, SOT23-5 package | Lower tempco and higher accuracy but no shutdown; higher cost and longer lead time | Select for metrology-grade accuracy where ultra-low drift outweighs shutdown requirement. |
Compared with REF3333AIDBVR and ADR3433ARJZ-R7, the MAX6037AAUK33+T uniquely combines automotive-grade temperature range, integrated shutdown, and 25ppm/°C tempco in a cost-effective SOT23-5 package-making it optimal for battery-aware, thermally demanding embedded systems.
Availability
MAX6037AAUK33+T is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, and precision industrial regulators requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037AAUK33+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, automotive, and communications applications.
The MAX6037 family targets ultra-low-power, high-accuracy voltage references for battery-operated and automotive systems where stability, small size, and shutdown capability are essential.
FAQ
What is the output voltage tolerance of the MAX6037AAUK33+T at +25°C?
The MAX6037AAUK33+T has a fixed output voltage of 3.300V with ±0.2% initial accuracy at +25°C, corresponding to a tolerance band of 3.2934V to 3.3066V. This specification is guaranteed for the 'A' grade variant and verified per Maxim's production test flow. The MAX6037AAUK33+T maintains this accuracy across its full operating temperature range when combined with its 25ppm/°C tempco rating.
Does the MAX6037AAUK33+T require an external capacitor on the output pin?
Yes, the MAX6037AAUK33+T requires an output capacitor between OUT and GND for stability, with a recommended range of 0.02µF to 1µF. Ceramic capacitors (X7R/X5R) are preferred due to low ESR. The device remains stable across this entire range without additional compensation components-enabling flexible, low-cost decoupling in compact layouts. The MAX6037AAUK33+T datasheet confirms stability down to 0.02µF, critical for space-constrained applications.
What is the minimum input voltage required for the MAX6037AAUK33+T to regulate at 3.3V?
The MAX6037AAUK33+T requires a minimum input voltage of 3.5V to maintain regulation at its nominal 3.300V output. This is derived from the specified input voltage range of 3.5V to 5.5V for the 3.3V variant, ensuring sufficient headroom for the 100mV maximum dropout voltage at 1mA load. Operating below 3.5V risks loss of regulation and increased output error, particularly at elevated temperatures or higher load currents.
How does the shutdown feature of the MAX6037AAUK33+T function electrically?
The MAX6037AAUK33+T features an active-low shutdown input (SHDN, Pin 3) that disables the output and reduces supply current to ≤500nA when pulled to ≤0.8V. Logic-high (≥2.0V) enables normal operation. Input leakage is ≤±1000nA across temperature, allowing direct interfacing with GPIOs or open-drain controllers without external pull-ups. During shutdown, the output is high-impedance, and the MAX6037AAUK33+T draws negligible current-ideal for energy harvesting and duty-cycled sensor nodes.
Is the MAX6037AAUK33+T qualified for automotive applications?
Yes, the MAX6037AAUK33+T is specified for operation across the full automotive temperature range of −40°C to +125°C and is packaged in an AEC-Q100 qualified SOT23-5 (U5-2) package. Its electrical parameters-including output accuracy, tempco, dropout voltage, and shutdown current-are guaranteed over this range. The MAX6037AAUK33+T is commonly deployed in cabin control units, body electronics, and ADAS sensor interfaces where reliability under thermal stress is mandatory.
MAX6037AAUK33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 19µVp-p
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- 3.5V ~ 5.5V
- Current - Supply:
- 275µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6037AAUK33+T FAQ
1.How can I place an order for MAX6037AAUK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037AAUK33+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 MAX6037AAUK33+T reliable?
The price and inventory of MAX6037AAUK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037AAUK33+T is usually 5 days.
3.What payment methods are accepted for MAX6037AAUK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037AAUK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037AAUK33+T?
MAX6037AAUK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037AAUK33+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 MAX6037AAUK33+T?
For technical support, including MAX6037AAUK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037AAUK33+T requirements.
6.How does Aetrix verify that MAX6037AAUK33+T is sourced from the original manufacturer or authorized distributors?
All MAX6037AAUK33+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 MAX6037AAUK33+T meets industry standards.
7.What is the process for return or replacement of MAX6037AAUK33+T?
All MAX6037AAUK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037AAUK33+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 MAX6037AAUK33+T part is unused and in its original packaging.
Return procedure for MAX6037AAUK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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