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Analog Devices Inc./Maxim Integrated MAX16037PLA29+T
- Part No.:
- MAX16037PLA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16037PLA29+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,357
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Product details
Overview
The MAX16037PLA29+T from Maxim Integrated is an 8-pin μDFN low-power supervisory circuit for microprocessor systems, featuring a factory-set 2.93V reset threshold, debounced manual-reset input (MR), active-low push-pull RESET output, and integrated battery switchover with <2µA backup current at +25°C. It operates from 1.2V to 5.5V and delivers reliable power-fail warning, reset timing, and SRAM backup control in portable POS terminals and industrial controllers.
For engineers reviewing the MAX16037PLA29+T datasheet, MAX16037PLA29+T pinout, MAX16037PLA29+T application, or MAX16037PLA29+T equivalent, key selection criteria include its 140ms minimum reset timeout, 13µA quiescent supply current at 2.8V, MR input with internal 20kΩ pullup, and guaranteed operation from –40°C to +85°C in the 2mm × 2mm µDFN-8 package.
Technical Context
The MAX16037PLA29+T implements a precision voltage-monitoring architecture with a 2.93V ±70mV reset threshold (VTH) referenced to an internal bandgap, enabling accurate brownout detection for 3.0V/3.3V systems. Its MR input includes hardware debounce and propagates reset assertion within 120ns, while the push-pull RESET output drives up to 20mA with VOL ≤ 0.3V at ISINK = 1.6mA.
It integrates a dedicated battery switchover path with VCC-to-OUT on-resistance of 3.7Ω (typ) at 3.15V/65mA and BATT-to-OUT on-resistance of 4.6Ω (typ) at 2.5V/5mA, ensuring low-loss backup power delivery to SRAM during VCC dropout. The device remains fully functional down to 1.2V VCC and asserts RESET valid across the entire operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93V (min 2.85V, max 3.00V) - precisely monitors 3.0V supply rails with ±2.4% tolerance over temperature. |
| Reset Timeout Period | 140ms (min), 280ms (max) - ensures sufficient processor initialization time after power recovery. |
| Supply Current (ICC) | 16µA (typ) at VCC = 3.6V - enables multi-year battery life in always-on backup applications. |
| Battery Backup Current | 1µA (typ) at VBATT = 2.8V, TA = +25°C - minimizes drain on coin-cell or supercap backup sources. |
| MR Input Pullup Resistance | 20kΩ (min) to VCC - eliminates need for external pullup and supports direct switch-to-GND interface. |
| RESET Output Type | Active-low push-pull - provides defined high-state voltage (≥0.8×VCC) without external pullup resistor. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded deployments. |
| Package | 2mm × 2mm, 8-pin µDFN - enables ultra-compact PCB layout in space-constrained portable equipment. |
Pinout & Package
MAX16037PLA29+T is housed in a thermally enhanced, RoHS-compliant 2mm × 2mm, 8-pin µDFN package with exposed pad (EP) for improved thermal dissipation and board-level reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low reset output | Push-pull driver asserts low during VCC dropout, MR activation, or brownout; holds low ≥140ms after recovery. |
| 2 - PFI | Power-fail comparator input | Monitors external voltage divider; triggers PFO when VPFI falls below 1.235V (±1.5%). |
| 3 - GND | Ground reference | Primary return path for all analog and digital functions; connects to EP for thermal conduction. |
| 4 - MR | Manual-reset input | Debounced logic input; low assertion forces RESET; internal 20kΩ pullup enables momentary switch interface. |
| 5 - PFO | Active-low power-fail output | Push-pull signal goes low when PFI < 1.235V or VCC < VTH - provides NMI-capable fault interrupt. |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation. |
| 7 - OUT | System power output | Switches between VCC and BATT based on voltage comparison; delivers up to 200mA from VCC. |
| 8 - BATT | Backup battery input | Connects to coin cell or supercap; automatically engages when VCC < VTH and VCC < VBATT − 40mV. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed reset threshold | 2.93V with ±2.4% accuracy over –40°C to +85°C - eliminates external resistor calibration for 3.0V systems. |
| Integrated battery switchover MOSFET | VCC-to-OUT RON = 3.7Ω (typ) at 3.15V - reduces voltage drop and heat generation during backup mode. |
| Ultra-low backup supply current | 1µA (typ) at +25°C - extends shelf life of CR2032 cells beyond 10 years in standby applications. |
| Dedicated MR input with hardware debounce | 120ns MR-to-RESET propagation delay and intrinsic noise immunity - removes need for RC filters or firmware debouncing. |
| Power-fail comparator with hysteresis | 1.235V trip point with 1% hysteresis - prevents chatter during slow-ramping or noisy supply lines. |
| Full 1.2V operation support | RESET remains valid and functional even when VCC drops to 1.2V - ensures fail-safe behavior in deep brownout conditions. |
Applications
| Portable POS Terminals | Industrial Programmable Logic Controllers |
|---|---|
Use Scenario: Battery-backed memory retention during AC power loss or hot-swap battery replacement in handheld payment devices. IC Role / Device Role / Timing Role: Supervisory IC providing MR-initiated reset, automatic BATT switchover to SRAM, and PFO-triggered firmware save before shutdown. Use Value: Prevents transaction data corruption by guaranteeing >140ms clean reset window and <2µA backup current to extend CR2032 life to >5 years. |
Use Scenario: Maintaining real-time clock and configuration registers during mains failure in DIN-rail mounted automation controllers. IC Role / Device Role / Timing Role: System supervisor asserting RESET on undervoltage, monitoring auxiliary 5V rail via PFI, and gating CE signals to prevent RAM write errors. Use Value: Eliminates need for discrete diode-OR + reset IC solution, reducing BOM count by 4 components and PCB area by 35%. |
| Set-Top Box Power Management | Medical Patient Monitor Data Logging |
Use Scenario: Preserving channel lineup and user preferences during brief grid sags or adapter disconnection in consumer STBs. IC Role / Device Role / Timing Role: Reset generator with 2.93V threshold tracking 3.3V LDO output, using MR for factory service mode entry and PFO for early power-fail warning. Use Value: Enables deterministic 140ms reset hold time synchronized to 3.3V rail collapse, avoiding boot-loop failures during marginal input conditions. |
Use Scenario: Securing ECG waveform buffers and calibration coefficients during unexpected AC outage in Class II medical devices. IC Role / Device Role / Timing Role: Low-power supervisor delivering <1µA backup current to supercap-backed SRAM, with RESET asserted before VCC drops below 2.85V. Use Value: Meets IEC 60601-1 requirement for >72-hour data retention on 0.47F supercap, validated across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16037PLA31+T | Factory-set 3.08V reset threshold (vs. 2.93V); identical pinout, package, and feature set. | Suitable for 3.3V systems requiring tighter margin above 3.0V rail; not interchangeable without recalculating PFI divider. | Select when system VCC nominal is 3.3V with tighter brownout guardband needed; same layout and firmware. |
| TPS3808G33DBVR | 3.3V fixed reset threshold, 350ms timeout, 2.5µA IQ, SOT-23-6 package - no MR, no battery switchover, no PFI/PFO. | Limited to basic reset-only applications; lacks backup control and power-fail warning required for SRAM retention. | Use only where battery backup and power-fail interrupt are unnecessary; requires PCB redesign due to 6-pin SOT-23 footprint. |
Compared with MAX16037PLA31+T, the MAX16037PLA29+T offers lower reset threshold for earlier brownout response in 3.0V systems; compared with TPS3808G33DBVR, it adds critical battery switchover and PFI monitoring but requires larger µDFN-8 layout and higher component cost.
Availability
MAX16037PLA29+T is available at Aetrix Electronics and suitable for portable POS terminals, industrial PLCs, set-top boxes, and medical data loggers requiring stable component supply with full industrial temperature support and long-term obsolescence management.
Supply support for MAX16037PLA29+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 power management, sensing, and connectivity in industrial, automotive, and computing applications.
The MAX16033–MAX16040 family was engineered specifically for ultra-low-power microprocessor supervision with integrated battery backup, targeting space- and energy-constrained embedded systems requiring guaranteed SRAM data retention during power disruption.
FAQ
What is the exact reset threshold voltage of the MAX16037PLA29+T?
MAX16037PLA29+T 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 applies specifically to the "29" suffix variant - other suffixes (e.g., "31", "46") denote different thresholds and are not interchangeable without circuit validation.
Does the MAX16037PLA29+T support battery backup with supercapacitors?
Yes, MAX16037PLA29+T supports supercapacitor backup via the BATT pin. Its automatic switchover logic engages when VCC falls below 2.93V and VBATT exceeds VCC by 40mV. The device draws only 1µA (typ) from the supercap in backup mode, enabling multi-hour retention with 0.47F units - confirmed in Figure 5a/b of the official datasheet.
Can the MAX16037PLA29+T be used without a backup battery?
Yes, MAX16037PLA29+T operates fully without a backup battery: connect BATT to GND and tie OUT directly to VCC. All supervisory functions - including RESET generation, MR input, PFI monitoring, and PFO output - remain active. The battery switchover path is disabled, but reset timing, voltage monitoring, and power-fail warning retain full functionality.
What is the function of the PFI and PFO pins on the MAX16037PLA29+T?
PFI is the power-fail input that monitors an external voltage divider; when VPFI falls below 1.235V, the MAX16037PLA29+T asserts PFO low as an active-low interrupt. PFO is a push-pull output that also goes low when VCC drops below the 2.93V reset threshold - enabling dual-trigger reset assertion for both primary supply failure and auxiliary rail faults.
Is the MAX16037PLA29+T pin-compatible with other devices in the MAX16033–MAX16040 family?
MAX16037PLA29+T shares identical 8-pin µDFN-8 pinout and footprint with MAX16037xx, MAX16038xx, MAX16039xx, and MAX16040xx variants. However, functional compatibility depends on enabled features: MAX16037 includes MR but no WDI, BATTON, or RESETIN. Swapping with MAX16038 (WDI) or MAX16039 (BATTON) requires schematic and firmware updates.
MAX16037PLA29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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+T FAQ
1.How can I place an order for MAX16037PLA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16037PLA29+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 MAX16037PLA29+T reliable?
The price and inventory of MAX16037PLA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16037PLA29+T is usually 5 days.
3.What payment methods are accepted for MAX16037PLA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16037PLA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16037PLA29+T?
MAX16037PLA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16037PLA29+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 MAX16037PLA29+T?
For technical support, including MAX16037PLA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16037PLA29+T requirements.
6.How does Aetrix verify that MAX16037PLA29+T is sourced from the original manufacturer or authorized distributors?
All MAX16037PLA29+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 MAX16037PLA29+T meets industry standards.
7.What is the process for return or replacement of MAX16037PLA29+T?
All MAX16037PLA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16037PLA29+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 MAX16037PLA29+T part is unused and in its original packaging.
Return procedure for MAX16037PLA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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