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Analog Devices Inc./Maxim Integrated MAX6037BAUK33+
- Part No.:
- MAX6037BAUK33+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- -
- Datasheet:
-
MAX6037BAUK33+.pdf
- Description:
- IC VREF SERIES 3.3V SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,966
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Product details
Overview
MAX6037BAUK33+ from Maxim Integrated is a low-dropout, micropower voltage reference with fixed 3.3V output, ±0.3% initial accuracy, 50ppm/°C max temperature coefficient, 100mV max dropout at 1mA, and active-low shutdown consuming ≤500nA. It operates from 3.5V to 5.5V supply and delivers ±5mA load current-ideal for precision ADC/DAC biasing in portable medical monitors and battery-powered wireless LAN modules.
For engineers reviewing the MAX6037BAUK33+ datasheet, MAX6037BAUK33+ pinout, MAX6037BAUK33+ application, or MAX6037BAUK33+ equivalent, key selection criteria include its automotive-grade -40°C to +125°C operation, SOT23-5 package footprint, 0.02µF–1µF capacitive-load stability, and shutdown logic compatibility with 0.8V logic-low threshold at VIN ≥ 3.5V.
Technical Context
The MAX6037BAUK33+ is a series-mode bandgap reference with internal trimming for fixed 3.3V output. Its shutdown circuitry uses an active-low input (SHDN) that disables output and reduces quiescent current to ≤500nA while maintaining high output impedance (>330kΩ) when disabled.
It features a low-impedance buffered output capable of sourcing/sinking ±5mA, stable with capacitive loads from 0.02µF to 1µF, and exhibits line regulation of ≤0.0133%/V and load regulation of ≤0.212%/mA over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.3% at +25°C - ensures accurate bias for 3.3V-system ADCs and sensors |
| Tempco | ≤50ppm/°C - supports 12-bit precision over -40°C to +125°C without calibration |
| Dropout Voltage | ≤100mV at 1mA - enables operation with only 3.4V supply in 3.3V systems |
| Quiescent Current | ≤275µA - extends battery life in always-on portable instrumentation |
| Shutdown Current | ≤500nA - reduces standby power by >500× vs active mode |
| Load Drive | ±5mA sourcing/sinking - directly drives SAR ADC reference inputs and op-amp buffers |
| Capacitive Stability | 0.02µF to 1µF - compatible with standard ceramic decoupling and low-ESR polymer caps |
Pinout & Package
The MAX6037BAUK33+ is housed in a 5-pin SOT23-5 package (U5-2 code), with 1.3mm × 2.9mm footprint and 0.95mm height-compatible with automated pick-and-place and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Adjustment Input | No connection required - internally connected (fixed-output variant); leave unconnected |
| 2 (GND) | Ground Reference | Primary return path for reference output and supply current; requires low-inductance PCB tie to system ground plane |
| 3 (SHDN) | Active-Low Shutdown Control | Pull ≤0.8V to disable output; ≥2.0V to enable; draws ≤0.15nA leakage in either state |
| 4 (IN) | Supply Input | Accepts 3.5V–5.5V; bypass with 0.1µF ceramic capacitor to GND for PSRR optimization |
| 5 (OUT) | Reference Output | Stable 3.3V source; connect 0.02µF–1µF capacitor to GND for transient stability and noise filtering |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V Output | Eliminates external resistor network, reducing BOM count and layout area vs adjustable references |
| Automotive Temperature Range | Guaranteed operation from -40°C to +125°C - suitable for under-hood and industrial control applications |
| Low Dropout (100mV) | Enables use with Li-ion batteries down to 3.4V or LDO pre-regulators with minimal headroom |
| Shutdown Mode | Reduces supply current to ≤500nA - critical for energy harvesting and ultra-low-power wake-on-event designs |
| Capacitive-Load Tolerance | Stable with 0.02µF–1µF output capacitance - supports compact ceramic and high-capacitance polymer solutions |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
Use Scenario: Powering analog front-end of handheld ECG or pulse oximeter with battery supply. IC Role / Device Role / Timing Role: Precision 3.3V reference for 12-bit ADC and sensor signal conditioning. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco maintain diagnostic-grade measurement integrity across temperature swings. | Use Scenario: Biasing RF power amplifier and baseband ICs in IEEE 802.11n client modules. IC Role / Device Role / Timing Role: Stable 3.3V reference for DACs, PLLs, and analog comparators in WLAN PHY layer. Use Value: Low 100mV dropout allows direct connection to 3.6V Li-ion cell, minimizing power loss and thermal rise. |
| Precision Data Acquisition Systems | Automotive Body Control Modules |
Use Scenario: Reference for multi-channel 16-bit SAR ADC in industrial process monitoring. IC Role / Device Role / Timing Role: Low-noise 3.3V reference enabling <1 LSB INL error over full operating temperature. Use Value: 0.02µF–1µF capacitive stability simplifies layout and eliminates need for external compensation networks. | Use Scenario: Supplying reference voltage to window comparator circuits in door module ECUs. IC Role / Device Role / Timing Role: Automotive-qualified 3.3V reference for fault-detection comparators and microcontroller ADCs. Use Value: -40°C to +125°C guaranteed operation and ≤500nA shutdown current meet ISO 16750-4 cold-cranking and sleep-mode requirements. |
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 | ±0.1% initial accuracy, 30ppm/°C tempco, 3.3V fixed, 4.5µA quiescent current, no shutdown | Higher accuracy but no shutdown; unsuitable for ultra-low-power sleep modes | Select when highest initial accuracy is prioritized over shutdown capability and quiescent current |
| REF3333AIDBVR | ±0.2% initial accuracy, 50ppm/°C tempco, 3.3V fixed, 4.5µA quiescent current, no shutdown | Lacks shutdown function; higher quiescent current limits battery runtime in intermittent-sensing nodes | Choose for cost-sensitive designs where shutdown is not required and TI supply chain preference applies |
Compared with ADR3433ARJZ-R7 and REF3333AIDBVR, the MAX6037BAUK33+ uniquely combines automotive temperature range, sub-µA shutdown, and SOT23-5 footprint-making it optimal for space-constrained, battery-operated systems requiring deep-sleep capability.
Availability
MAX6037BAUK33+ is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, and precision data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037BAUK33+ 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 medical applications.
The MAX6037 family targets battery-powered and automotive systems requiring micropower, high-accuracy voltage references with shutdown-optimized for space-constrained PCBs and harsh thermal environments.
FAQ
What is the minimum input voltage required for stable operation of the MAX6037BAUK33+?
The MAX6037BAUK33+ requires a minimum input voltage of 3.5V to guarantee specified performance across temperature, per its electrical characteristics table. This is derived from the (VOUT + 0.2V) rule, ensuring adequate headroom for the 100mV max dropout. Operation below 3.5V may result in degraded line regulation or failure to regulate.
Does the MAX6037BAUK33+ require an external output capacitor, and what value range is supported?
Yes, the MAX6037BAUK33+ requires an external output capacitor for stability and noise reduction. It is fully stable with capacitive loads from 0.02µF to 1µF, including standard X7R/X5R ceramics and low-ESR polymer types. A 0.1µF ceramic capacitor is recommended for general-purpose decoupling and transient response.
What is the logic threshold for enabling the shutdown function on the MAX6037BAUK33+?
The MAX6037BAUK33+ SHDN pin is active-low. To enable normal operation, SHDN must be driven to ≥2.0V (logic-high). To enter shutdown, SHDN must be pulled to ≤0.8V (logic-low) when VIN ≥ 3.5V. Input leakage remains ≤0.15nA in both states, minimizing impact on driving circuitry.
Can the MAX6037BAUK33+ drive a 5mA load while maintaining output accuracy?
Yes, the MAX6037BAUK33+ is rated to source and sink up to ±5mA while maintaining output voltage within its specified load regulation of ≤0.212%/mA. At 5mA sourcing, dropout remains ≤100mV, and output deviation stays within ±0.3% initial accuracy plus tempco drift over temperature.
Is the MAX6037BAUK33+ qualified for automotive applications?
Yes, the MAX6037BAUK33+ is specified over the full automotive temperature range of -40°C to +125°C and packaged in a qualified SOT23-5 (U5-2) outline. It meets AEC-Q100 stress test requirements for reliability in automotive body electronics and infotainment subsystems.
MAX6037BAUK33+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- *
- Packaging:
- Product Status:
- Active
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX6037BAUK33+ FAQ
1.How can I place an order for MAX6037BAUK33+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK33+ 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 MAX6037BAUK33+ reliable?
The price and inventory of MAX6037BAUK33+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK33+ is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK33+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK33+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK33+?
MAX6037BAUK33+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK33+ 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 MAX6037BAUK33+?
For technical support, including MAX6037BAUK33+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK33+ requirements.
6.How does Aetrix verify that MAX6037BAUK33+ is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK33+ 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 MAX6037BAUK33+ meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK33+?
All MAX6037BAUK33+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK33+, 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 MAX6037BAUK33+ part is unused and in its original packaging.
Return procedure for MAX6037BAUK33+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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