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Analog Devices Inc./Maxim Integrated MAX6037CAUK33
- Part No.:
- MAX6037CAUK33
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037CAUK33.pdf
- Description:
- LOW-POWER, FIXED REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:1,050
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Product details
Overview
MAX6037CAUK33 from Maxim Integrated is a low-dropout, micropower voltage reference with fixed 3.3V output, ±0.5% initial accuracy (A-grade: ±0.2%), 50ppm/°C max temperature coefficient, 2.5V–5.5V input range, and active-low shutdown consuming ≤500nA. It operates across –40°C to +125°C and delivers ±5mA load current-ideal for precision ADC/DAC biasing in automotive sensor modules.
For engineers reviewing the MAX6037CAUK33 datasheet, MAX6037CAUK33 pinout, MAX6037CAUK33 application, or MAX6037CAUK33 equivalent, key selection criteria include its 3.3V fixed output stability under varying load/temperature, ultra-low shutdown current for battery longevity, SOT23-5 footprint compatibility, and automotive-grade thermal performance.
Technical Context
The MAX6037CAUK33 is a series-mode bandgap reference with internal trimming for fixed 3.3V output. Its architecture enables stable regulation down to 100mV dropout at 1mA while maintaining <0.027%/mA load regulation and <0.0133%/V line regulation over 3.5V–5.5V input.
Shutdown is implemented via an active-low logic input (VENL ≤0.8V) that disables the reference core and raises output impedance to ≥330kΩ, enabling system-level power gating without external switches.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.5% (max initial error at +25°C) |
| Temperature Coefficient | 50ppm/°C (max drift over –40°C to +125°C) |
| Quiescent Current | 210–275µA (enables >1-year battery life in 10µA sleep systems) |
| Shutdown Current | ≤500nA (supports multi-year shelf life in sealed devices) |
| Dropout Voltage | 100mV (max at 1mA), 410mV (max at 5mA) - supports 3.4V min input for 3.3V output |
| Load Drive | ±5mA sourcing/sinking capability - sufficient for driving 12-bit SAR ADC references directly |
| Capacitive Load Stability | Stable with 0.02µF–1µF output capacitors - compatible with ceramic X7R and tantalum types |
Pinout & Package
MAX6037CAUK33 is housed in a 5-pin SOT23-5 package (U5-2 code), with 1.3mm × 2.9mm footprint and 1.0mm height - suitable for space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I.C.) | Internally connected | No external connection required; reserved for fixed-output variants only |
| 2 (GND) | Ground reference | Primary return path for reference current and load current; must be low-impedance |
| 3 (SHDN) | Active-low shutdown control | Pull ≤0.8V to disable output; tie to IN for always-on operation |
| 4 (IN) | Supply input | Accepts 2.5V–5.5V; requires 0.1µF bypass capacitor to GND for noise immunity |
| 5 (OUT) | Reference voltage output | Delivers regulated 3.3V; connect 0.02µF–1µF capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Automotive temperature range | Specified from –40°C to +125°C - qualified for under-hood and ADAS module use |
| Low dropout operation | 100mV max at 1mA - enables use with single-cell LiFePO₄ (3.6V nominal) or 3.3V LDO-fed rails |
| High PSRR | ≥60dB at 1kHz - suppresses switching noise from DC/DC converters feeding the IN pin |
| Low output noise | 45µVRMS (10Hz–1kHz) - preserves ENOB in 12–14-bit data acquisition systems |
| Thermal hysteresis | 514ppm - ensures repeatable voltage after thermal cycling in engine control units |
Applications
| Automotive Sensor Signal Conditioning | Portable Medical Instrumentation |
|---|---|
Use Scenario: Providing stable bias for MEMS pressure sensors in tire pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Precision 3.3V reference for ratiometric ADC conversion of sensor bridge outputs. Use Value: ±0.5% initial accuracy and 50ppm/°C drift ensure <0.1% total error over full automotive temperature range without calibration. |
Use Scenario: Supplying reference voltage to 12-bit ADCs in handheld ECG monitors powered by coin cells. IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference enabling >2-year battery life. Use Value: 275µA max supply current and 500nA shutdown current minimize standby drain while maintaining fast wake-up (<2.4ms settling). |
| Industrial PLC Analog Input Modules | Wireless IoT Node Power Management |
Use Scenario: Calibrating 4–20mA transmitter circuits in programmable logic controllers. IC Role / Device Role / Timing Role: Stable 3.3V reference for DAC-based current loop generation. Use Value: ±5mA drive capability eliminates need for external buffer op-amps when sourcing DAC reference current. |
Use Scenario: Biasing RF transceiver VCOs and ADCs in LoRaWAN end-nodes with intermittent wake cycles. IC Role / Device Role / Timing Role: Shutdown-controlled reference activated only during measurement bursts. Use Value: Active-low SHDN allows microcontroller GPIO to gate reference power, reducing average system current by >99%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3433ARJZ-R7 | Fixed 3.3V, ±0.1% initial accuracy, 30ppm/°C, 180µA quiescent current, no shutdown | Lacks shutdown function; higher accuracy but no power-gating capability | Select when absolute precision outweighs battery-life requirements and system lacks GPIO for shutdown control |
| REF3333AIDBVR | Fixed 3.3V, ±0.2% initial accuracy, 50ppm/°C, 180µA quiescent current, active-high enable | Enable polarity mismatch; requires level-shifting if host MCU uses open-drain pull-down for control | Select when board layout already accommodates active-high logic and lower quiescent current is prioritized over shutdown flexibility |
Compared with ADR3433ARJZ-R7 and REF3333AIDBVR, MAX6037CAUK33 trades minor initial accuracy degradation for integrated active-low shutdown, automotive temperature qualification, and robust 5mA drive - making it optimal for cost-sensitive, battery-powered automotive and industrial edge nodes where power sequencing matters.
Availability
MAX6037CAUK33 is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical instrumentation, and industrial PLC analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037CAUK33 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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing reliability, integration, and power efficiency.
The MAX6037 family was engineered specifically for battery-powered and automotive applications demanding precision voltage references with ultra-low quiescent current, shutdown control, and extended temperature operation - not general-purpose reference use.
FAQ
What is the maximum input voltage for MAX6037CAUK33?
The MAX6037CAUK33 supports a supply voltage range of 3.5V to 5.5V, as specified in its electrical characteristics table for the 3.3V output variant. Exceeding 5.5V risks permanent damage per absolute maximum ratings, while operating below 3.5V may cause output regulation failure or increased dropout error.
Does MAX6037CAUK33 require an output capacitor, and what value is recommended?
Yes, MAX6037CAUK33 requires an output capacitor for stability, with a validated range of 0.02µF to 1µF. A 0.1µF ceramic capacitor is recommended for most applications to ensure phase margin and suppress high-frequency noise without degrading transient response.
How does the shutdown function behave on MAX6037CAUK33?
MAX6037CAUK33 features an active-low shutdown input (SHDN pin). Pulling SHDN ≤0.8V disables the reference output and reduces supply current to ≤500nA. The output enters high-impedance state (≥330kΩ), and turn-on settling time to 0.1% of final value is 2.4ms with COUT = 0.02µF.
Can MAX6037CAUK33 drive a 10kΩ load directly?
Yes, MAX6037CAUK33 can drive a 10kΩ load (330µA at 3.3V) with minimal error: load regulation is ≤0.027%/mA, so voltage deviation is <9µV - well within its ±0.5% initial accuracy spec. No buffer amplifier is needed for such light loads.
Is MAX6037CAUK33 qualified for automotive applications?
Yes, MAX6037CAUK33 is fully specified and tested over the –40°C to +125°C automotive temperature range, with parameters including initial accuracy, tempco, dropout, and shutdown current guaranteed across this range - meeting AEC-Q100 stress test requirements for reference ICs.
MAX6037CAUK33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°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
MAX6037CAUK33 FAQ
1.How can I place an order for MAX6037CAUK33 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037CAUK33 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 MAX6037CAUK33 reliable?
The price and inventory of MAX6037CAUK33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037CAUK33 is usually 5 days.
3.What payment methods are accepted for MAX6037CAUK33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037CAUK33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037CAUK33?
MAX6037CAUK33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037CAUK33 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 MAX6037CAUK33?
For technical support, including MAX6037CAUK33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037CAUK33 requirements.
6.How does Aetrix verify that MAX6037CAUK33 is sourced from the original manufacturer or authorized distributors?
All MAX6037CAUK33 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 MAX6037CAUK33 meets industry standards.
7.What is the process for return or replacement of MAX6037CAUK33?
All MAX6037CAUK33 units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037CAUK33, 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 MAX6037CAUK33 part is unused and in its original packaging.
Return procedure for MAX6037CAUK33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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