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Analog Devices Inc./Maxim Integrated MAX16037PLA29+
- Part No.:
- MAX16037PLA29+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16037PLA29+.pdf
- Description:
- MAX16037 LOW-POWER BATTERY-BACKU
- Quantity:
- Payment:
- Shipping:
Inventory:239
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Product details
Overview
The MAX16037PLA29+ from Maxim Integrated is an 8-pin µDFN low-power microprocessor supervisory circuit with manual-reset input, precision 2.93V reset threshold, active-low push-pull reset output, and battery switchover control for SRAM backup. It operates from 1.2V to 5.5V, draws only 13µA quiescent current, and asserts reset for ≥140ms after VCC rise-enabling reliable power-up/brownout protection in portable POS terminals and industrial controllers.
For engineers reviewing the MAX16037PLA29+ datasheet, MAX16037PLA29+ pinout, MAX16037PLA29+ application, or MAX16037PLA29+ equivalent, key selection criteria include its factory-set 2.93V reset threshold, 8-pin µDFN-8 package, manual-reset debounce capability, battery-on switchover behavior, and compatibility with 3.0V/3.3V µP systems requiring stable low-voltage supervision.
Technical Context
The MAX16037PLA29+ integrates a precision voltage monitor, debounced manual-reset input (MR), power-fail comparator (PFI/PFO), and bidirectional VCC/BATT switchover switch driving OUT. Its internal 2.93V reset threshold is factory-trimmed with ±15mV accuracy over –40°C to +85°C, and reset remains valid down to 1.2V supply.
It implements a dedicated MR path with 20kΩ internal pullup, 120ns MR-to-reset propagation delay, and glitch immunity of 100ns at 3.3V. The device lacks watchdog, BATTON, RESETIN, or chip-enable gating-features reserved for other members of the MAX16033–MAX16040 family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93V ±15mV - precisely monitors 3.0V rails with minimal margin loss during brownout |
| Reset Timeout Period | 140ms min - ensures µP completes full initialization before release from reset |
| Supply Current | 13µA typ at 5.5V - enables multi-year battery life in always-on backup applications |
| Operating Voltage | 1.2V to 5.5V - supports direct interface with 1.2V I/O domains and legacy 5V systems |
| Reset Output Type | Active-low push-pull - drives µP reset pin directly without external pullup resistor |
| Package | 8-pin µDFN (2mm × 2mm) - fits space-constrained portable designs with thermal pad for reliability |
| Temperature Range | –40°C to +85°C - qualified for industrial and extended-temperature embedded deployments |
Pinout & Package
MAX16037PLA29+ uses an 8-pin µDFN-8 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. Pin 1 is marked by dot; pin numbering follows standard counter-clockwise layout from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output - asserts low when VCC < 2.93V or MR is pulled low; holds for ≥140ms after recovery |
| 2 | PFI | Power-fail input - monitors external voltage divider; triggers PFO when voltage falls below 1.235V |
| 3 | GND | Ground reference - connects to system ground plane; thermal pad must be soldered for thermal performance |
| 4 | MR | Manual-reset input - logic-low assertion forces reset; internally pulled up to VCC via 20kΩ resistor |
| 5 | PFO | Active-low power-fail output - open-drain (per suffix 'P') - signals µP NMI or interrupt on detected power drop |
| 6 | VCC | Main supply input - powers internal circuitry; range 1.2V–5.5V; supplies OUT when above reset threshold |
| 7 | OUT | Output rail - sourced from VCC normally, switches to BATT during backup mode (VCC < VTH and VCC < VBATT) |
| 8 | BATT | Battery input - accepts 2.1V–5.5V backup source; enables SRAM retention when main supply fails |
Key Features
| Feature | Design Value |
|---|---|
| Factory-Trimmed Reset Threshold | 2.93V ±15mV - eliminates external resistor network and calibration effort for 3.0V systems |
| Debounced Manual-Reset Input | Internal 20kΩ pullup + 100ns glitch immunity - supports direct switch connection without RC filter |
| Low-Voltage Reset Validity | Reset asserted down to 1.2V VCC - guarantees supervision even during deep brownout conditions |
| Battery Switchover Hysteresis | 40mV VCC–VBATT threshold gap - prevents oscillation during slow VCC decay near switchover point |
| Ultra-Low Quiescent Current | 13µA typical - extends coin-cell or supercap lifetime in always-on backup applications |
Applications
| Portable POS Terminals | Industrial PLC Controllers |
|---|---|
Use Scenario: Battery-backed SRAM retains transaction logs and configuration during AC power loss or hot-swap battery replacement. IC Role / Device Role / Timing Role: Supervisory IC provides VCC monitoring, manual reset via keypad, and seamless BATT→OUT switchover within 1µs. Use Value: Prevents data corruption during brownout; 2.93V threshold matches 3.0V LDO output tolerance; 140ms reset timeout satisfies ARM Cortex-M boot requirements. | Use Scenario: Embedded controller maintains real-time clock and I/O state during brief mains interruption in factory automation. IC Role / Device Role / Timing Role: Acts as primary power supervisor-asserting reset on undervoltage, signaling PFO to upstream MCU, and enabling backup power to RTC/SRAM. Use Value: 1.2V minimum operating voltage ensures supervision during 3.3V rail collapse; 8-pin µDFN fits dense PCB layouts; -40°C to +85°C rating meets industrial environmental specs. |
| Set-Top Box Firmware Recovery | Medical Infusion Pump Memory Protection |
Use Scenario: Ensures safe firmware reload after unexpected power cycle by holding µP in reset until stable 3.3V rail is confirmed. IC Role / Device Role / Timing Role: Precision 2.93V reset generator with 140ms timeout - synchronizes with bootloader readiness window. Use Value: Factory-trimmed threshold avoids design-in variance; push-pull RESET eliminates need for external pullup, reducing BOM count. | Use Scenario: Preserves critical dosage history and calibration data in volatile memory during battery swap or power interruption. IC Role / Device Role / Timing Role: Dual-role supervisor: monitors main 3.3V rail and enables BATT-powered SRAM retention via OUT switching. Use Value: 13µA supply current extends primary battery life; 40mV switchover hysteresis prevents chatter during gradual voltage sag; medical-grade temp range compliance verified. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16037PLA31+ | Factory-set 3.08V reset threshold (±15mV); identical pinout, timing, and features | Suitable for systems using 3.3V LDOs with tighter output tolerance (±2%) | Select when 3.08V threshold better aligns with actual 3.3V rail variation under load |
| TPS3808G33DBVR | 3.3V fixed threshold, 350ms reset timeout, SOT-23-6 package, no MR or battery switchover | Limited to basic reset generation-no backup power control or manual reset support | Choose only if battery backup and MR are unnecessary and longer reset timeout is acceptable |
Compared with MAX16037PLA31+, the MAX16037PLA29+ offers tighter alignment with nominal 3.0V rails; compared with TPS3808G33DBVR, it delivers integrated battery switchover and MR functionality absent in the TI part-making it irreplaceable in SRAM-retention-critical designs.
Availability
MAX16037PLA29+ is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLC controllers, set-top box firmware recovery systems, and medical infusion pump memory protection requiring stable component supply across long production lifecycles.
Supply support for MAX16037PLA29+ 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 computing applications.
The MAX16033–MAX16040 family was engineered specifically for low-power µP supervision with integrated battery switchover-targeting space-constrained, battery-backed systems where reliability, voltage accuracy, and minimal quiescent current are critical.
FAQ
What is the exact reset threshold voltage of the MAX16037PLA29+?
The MAX16037PLA29+ has a factory-trimmed reset threshold of 2.93V, with guaranteed limits of 2.85V (min) and 3.00V (max) over –40°C to +85°C. This value is laser-trimmed during production and does not require external resistor networks. The '29' in the part number explicitly denotes this 2.93V variant, and the threshold remains stable with <0.3% drift over temperature per the normalized threshold graph in the datasheet.
Does the MAX16037PLA29+ support battery backup functionality?
Yes, the MAX16037PLA29+ fully supports battery backup. When VCC falls below 2.93V and also drops below VBATT, the internal MOSFET automatically switches OUT from VCC to BATT within 1µs. The device maintains this state until VCC rises above both the reset threshold and VBATT. BATT accepts 2.1V–5.5V sources, and the 40mV switchover hysteresis prevents oscillation during slow voltage decay-ensuring clean SRAM retention in the MAX16037PLA29+.
What is the function of the MR pin on the MAX16037PLA29+?
The MR (Manual Reset) pin on the MAX16037PLA29+ is an active-low input that forces RESET assertion when pulled low. It features an internal 20kΩ pullup to VCC, requires no external components, and provides 100ns glitch immunity at 3.3V. RESET remains asserted for ≥140ms after MR returns high, satisfying µP boot timing requirements. This allows direct connection to a momentary switch to GND-making the MAX16037PLA29+ ideal for field-serviceable or user-initiated reset scenarios.
Is the RESET output of the MAX16037PLA29+ push-pull or open-drain?
Per the 'L' in the suffix 'PLA29+', the MAX16037PLA29+ features an active-low push-pull RESET output. This means it actively drives LOW during reset and HIGH (to VCC) when deasserted-eliminating the need for an external pullup resistor. The output can sink 20mA and source sufficient current to directly drive most µP reset inputs, simplifying layout and improving noise immunity compared to open-drain alternatives like the 'P' variants.
Can the MAX16037PLA29+ monitor a secondary power rail using RESETIN?
No, the MAX16037PLA29+ does not include RESETIN functionality. That feature is exclusive to the MAX16036/MAX16040 variants (denoted by '36' or '40' in the base part number). The MAX16037PLA29+ belongs to the MR-enabled subgroup (33/37) and contains only MR, PFI, PFO, RESET, OUT, VCC, GND, and BATT pins-no auxiliary reset comparator input. For secondary rail monitoring, engineers must select MAX16036PLA29+ or MAX16040PLA29+ instead.
MAX16037PLA29+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µDFN (2x2)
MAX16037PLA29+ FAQ
1.How can I place an order for MAX16037PLA29+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16037PLA29+ 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 MAX16037PLA29+ reliable?
The price and inventory of MAX16037PLA29+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16037PLA29+ is usually 5 days.
3.What payment methods are accepted for MAX16037PLA29+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16037PLA29+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16037PLA29+?
MAX16037PLA29+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16037PLA29+ 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 MAX16037PLA29+?
For technical support, including MAX16037PLA29+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16037PLA29+ requirements.
6.How does Aetrix verify that MAX16037PLA29+ is sourced from the original manufacturer or authorized distributors?
All MAX16037PLA29+ 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 MAX16037PLA29+ meets industry standards.
7.What is the process for return or replacement of MAX16037PLA29+?
All MAX16037PLA29+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16037PLA29+, 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 MAX16037PLA29+ part is unused and in its original packaging.
Return procedure for MAX16037PLA29+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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MIC826SYMT-TR
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