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Analog Devices Inc./Maxim Integrated MAX6037BAUK33+T
- Part No.:
- MAX6037BAUK33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6037BAUK33+T.pdf
- Description:
- IC VREF SERIES 0.3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
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Product details
Overview
MAX6037BAUK33+T from Maxim Integrated is a low-dropout, micropower voltage reference IC with fixed 3.3V output, ±0.3% initial accuracy, 50ppm/°C max temperature coefficient, and active-low shutdown (≤500nA). It operates from 3.5V to 5.5V input, delivers ±5mA load current, and is used in precision analog front-ends for portable medical sensors and battery-powered wireless LAN modules.
For engineers reviewing the MAX6037BAUK33+T datasheet, MAX6037BAUK33+T pinout, MAX6037BAUK33+T application, or MAX6037BAUK33+T equivalent, key selection criteria include its automotive-grade -40°C to +125°C operation, 100mV dropout at 1mA, 0.02µF–1µF capacitive-load stability, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX6037BAUK33+T is a series-mode bandgap voltage reference with internal trimming for fixed 3.3V output. Its shutdown circuitry uses an active-low logic input referenced to VIN, enabling ultra-low quiescent current (≤500nA) without external biasing. The device maintains regulation across supply variations (3.5V–5.5V) and load currents (±5mA) while exhibiting minimal line and load regulation (≤0.0133%/V and ≤0.212%/mA).
Thermal performance is specified over the full automotive range (-40°C to +125°C), with thermal hysteresis of 514ppm and long-term stability of 133ppm over 1000 hours. Output impedance when disabled exceeds 330kΩ, ensuring high isolation during shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.300V ±0.3% at +25°C - ensures stable reference for 12-bit ADCs and DACs requiring ≤10mV absolute error |
| Tempco | 50ppm/°C max - limits drift to ±6.6mV over -40°C to +125°C ambient, critical for automotive sensor calibration |
| Dropout Voltage | 100mV max at 1mA - enables operation with only 3.4V supply, supporting single-cell Li-ion or 3.3V rail margin |
| Quiescent Current | 275µA max - allows >1-year battery life in 10µA sleep-cycle systems using periodic wake-up sampling |
| Shutdown Current | 500nA max - reduces standby power to <1.7µW at 3.5V, essential for always-on IoT edge nodes |
| Capacitive Load Range | 0.02µF to 1µF - supports ceramic decoupling without oscillation, compatible with standard 0402/0603 MLCC footprints |
| Supply Range | 3.5V to 5.5V - matches regulated 3.3V or 5V system rails; minimum VIN = VOUT + 0.2V enforces safe headroom |
Pinout & Package
The MAX6037BAUK33+T is housed in a 5-pin SOT23-5 package (U5-2 code, top mark AEJH), with exposed pad not electrically connected. Pin 1 is ADJ (internally connected, no external connection), Pin 2 is GND, Pin 3 is SHDN (active-low), Pin 4 is IN, and Pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ) | Internal connection | No external connection required; reserved for adjustable variants only - floating on MAX6037BAUK33+T |
| 2 (GND) | Analog ground reference | Must be low-impedance path to system ground plane; separates reference return from digital switching noise |
| 3 (SHDN) | Active-low enable control | Pull low (<0.8V) to disable output; tie to IN for always-on operation; logic thresholds defined per VIN range |
| 4 (IN) | Unregulated input supply | Requires 0.1µF–1µF bypass capacitor to GND; minimum 3.5V input ensures regulation at 3.3V output |
| 5 (OUT) | Precision reference output | Delivers 3.3V ±0.3% with ±5mA sourcing/sinking; connect 0.02µF–1µF capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3V output | Eliminates external resistor network, reducing BOM count and layout area versus adjustable references |
| Automotive temperature range | Guaranteed operation from -40°C to +125°C enables use in under-hood or industrial control environments |
| Low dropout (100mV @ 1mA) | Permits direct regulation from 3.4V sources, avoiding inefficient pre-regulation stages in low-voltage systems |
| Ultra-low shutdown current | 500nA max shutdown draw extends battery life in intermittent-sampling applications like wearable ECG monitors |
| Capacitive-load stability | Stable with 0.02µF–1µF output capacitance, allowing use of small, low-ESR ceramic capacitors without compensation |
Applications
| Portable Medical Sensors | Wireless LAN Transceivers |
|---|---|
|
Use Scenario: Battery-powered pulse oximeter with 12-bit ADC digitizing photodiode signals. IC Role / Device Role / Timing Role: Provides stable 3.3V reference for ADC conversion, rejecting supply ripple from switching regulators. Use Value: ±0.3% initial accuracy and 50ppm/°C tempco ensure <±1 LSB error over temperature, meeting IEC 60601 clinical accuracy requirements. |
Use Scenario: 2.4GHz Wi-Fi module requiring precise 3.3V bias for RF front-end LNA and mixer stages. IC Role / Device Role / Timing Role: Supplies clean, low-noise 3.3V reference to analog bias circuits, minimizing phase noise degradation. Use Value: 45µVRMS noise (10Hz–1kHz) and 19µVP-P (0.1Hz–10Hz) prevent SNR reduction in sensitive RF receive paths. |
| Precision Industrial Regulators | Automotive Body Control Modules |
|
Use Scenario: Programmable logic controller (PLC) analog input card measuring 4–20mA loop current via shunt resistor. IC Role / Device Role / Timing Role: References 24-bit ΣΔ ADC converting shunt voltage, rejecting common-mode noise from field wiring. Use Value: 0.02µF–1µF capacitive-load tolerance allows integration with compact 0402 ceramic caps, reducing board area by 30% vs. larger tantalum alternatives. |
Use Scenario: Door module monitoring window position with Hall-effect sensor and microcontroller ADC. IC Role / Device Role / Timing Role: Supplies 3.3V reference to MCU's internal ADC and analog comparators for fault detection. Use Value: -40°C to +125°C guaranteed operation ensures reliable sensing during engine-off hot soak and cold cranking conditions. |
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, 180µA quiescent current, no shutdown | Lacks shutdown function; better accuracy but higher supply current; requires external enable circuitry for low-power modes | Select when highest initial accuracy is prioritized over shutdown capability and ultra-low standby current |
| REF3333AIDBVR | ±0.2% initial accuracy, 50ppm/°C tempco, 4.5µA quiescent current, shutdown current 1µA | Lower quiescent current than MAX6037BAUK33+T but higher shutdown current (1µA vs. 500nA); same SOT23-5 footprint | Choose when extended battery life in active mode is critical, accepting slightly higher shutdown leakage |
Compared with ADR3433ARJZ-R7 and REF3333AIDBVR, the MAX6037BAUK33+T uniquely balances automotive temperature range, integrated shutdown with sub-µA leakage, and 3.3V fixed output in SOT23-5-making it optimal for space- and power-constrained automotive and portable designs where both precision and ultra-low standby power are mandatory.
Availability
MAX6037BAUK33+T is available at Aetrix Electronics and suitable for portable medical sensors, wireless LAN transceivers, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6037BAUK33+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 demanding industrial, automotive, and medical applications, emphasizing low power, high accuracy, and robust reliability.
The MAX6037 family was engineered specifically for battery-powered and automotive systems needing micropower, low-dropout voltage references with shutdown-delivering precision without compromising energy efficiency or thermal resilience.
FAQ
What is the maximum input voltage for MAX6037BAUK33+T?
The MAX6037BAUK33+T supports a maximum input voltage of 5.5V, as specified in its absolute maximum ratings and confirmed across all electrical characteristics tables. Operation above this voltage risks permanent damage. The device is designed for 3.5V to 5.5V supply range, with 5.5V representing the upper functional and safe limit for continuous operation.
Does MAX6037BAUK33+T require an external capacitor on the output pin?
Yes, the MAX6037BAUK33+T requires an output capacitor between OUT and GND for stability, with a validated range of 0.02µF to 1µF. This capacitor suppresses high-frequency noise and prevents oscillation. Ceramic capacitors within this range are recommended due to their low ESR and compatibility with the device's internal compensation.
Can MAX6037BAUK33+T be used in automotive applications?
Yes, the MAX6037BAUK33+T is explicitly specified for the automotive temperature range of -40°C to +125°C and qualified per AEC-Q100 stress test requirements. Its 50ppm/°C tempco, 133ppm long-term stability, and thermal hysteresis of 514ppm meet stringent automotive sensor and control module accuracy needs.
What is the typical turn-on settling time for MAX6037BAUK33+T?
The typical turn-on settling time for MAX6037BAUK33+T is 2.4ms to within 0.1% of final 3.3V output, measured with COUT = 0.02µF and VIN = 5V, as documented in the MAX6037_33 electrical characteristics table. This value reflects full stabilization after SHDN transitions from low to high.
Is the ADJ pin on MAX6037BAUK33+T functional or unused?
The ADJ pin on MAX6037BAUK33+T is internally connected and non-functional - it is reserved for the adjustable MAX6037_ADJ variant. The datasheet Pin Description states "I.C. (Internally connected. All fixed output voltage options.) Do not connect anything to this pin." No external circuitry should be attached to Pin 1.
MAX6037BAUK33+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:
- ±0.3%
- 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
MAX6037BAUK33+T FAQ
1.How can I place an order for MAX6037BAUK33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6037BAUK33+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 MAX6037BAUK33+T reliable?
The price and inventory of MAX6037BAUK33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6037BAUK33+T is usually 5 days.
3.What payment methods are accepted for MAX6037BAUK33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6037BAUK33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6037BAUK33+T?
MAX6037BAUK33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6037BAUK33+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 MAX6037BAUK33+T?
For technical support, including MAX6037BAUK33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6037BAUK33+T requirements.
6.How does Aetrix verify that MAX6037BAUK33+T is sourced from the original manufacturer or authorized distributors?
All MAX6037BAUK33+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 MAX6037BAUK33+T meets industry standards.
7.What is the process for return or replacement of MAX6037BAUK33+T?
All MAX6037BAUK33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6037BAUK33+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 MAX6037BAUK33+T part is unused and in its original packaging.
Return procedure for MAX6037BAUK33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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