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Analog Devices Inc./Maxim Integrated MAX16036LLB31+
- Part No.:
- MAX16036LLB31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16036LLB31+.pdf
- Description:
- MAX16036 LOW-POWER BATTERY-BACKU
- Quantity:
- Payment:
- Shipping:
Inventory:2,060
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Product details
Overview
MAX16036LLB31+ from Maxim Integrated is a low-power µP supervisory circuit with auxiliary user-adjustable RESETIN input, active-low push-pull reset output, and precision 3.08V factory-set reset threshold (±70mV). It provides battery switchover, power-fail warning, and chip-enable gating for SRAM backup in brownout conditions. Designed for portable microprocessor systems requiring reliable power monitoring down to 1.2V supply.
For engineers reviewing the MAX16036LLB31+ datasheet, MAX16036LLB31+ pinout, MAX16036LLB31+ application, or MAX16036LLB31+ equivalent, this device delivers verified 140ms minimum reset timeout, 13µA quiescent current at 5.5V, 1.235V RESETIN comparator threshold with <25nA input current, and µDFN-10 package compatibility with industrial temperature range (-40°C to +85°C).
Technical Context
The MAX16036LLB31+ integrates a precision 1.235V internal reference to set RESETIN threshold, enabling external resistor-divider configuration for secondary supply monitoring. Its reset generator asserts active-low push-pull RESET for ≥140ms after VCC rises above 3.08V or RESETIN recovers above 1.235V.
It features dedicated chip-enable gating (CEIN/CEOUT) with ≤9ns propagation delay (50Ω source, 50pF load), 100Ω on-resistance when enabled, and automatic disable during reset to prevent SRAM corruption. Battery switchover occurs when VCC falls below 3.08V and VBATT exceeds VCC by >40mV, with BATT-to-OUT MOSFET on-resistance as low as 4.6Ω at 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08V ±70mV - factory-trimmed voltage at which RESET asserts on VCC fall; ensures reliable brownout detection for 3.3V/3.0V systems. |
| RESET Timeout Period | 140ms (min) - guarantees µP initialization completes before release; immune to short transients per tRP specification. |
| Quiescent Supply Current | 13µA at VCC = 5.5V - enables multi-year battery life in always-on backup applications. |
| RESETIN Threshold | 1.235V ±50mV - fixed internal reference enabling accurate secondary supply monitoring via external resistor divider. |
| VCC Operating Range | 1.2V to 5.5V - supports operation during deep brownout and full rail conditions without reset assertion loss. |
| Package | 10-pin µDFN (2mm × 2mm, 0.5mm pitch) - compact footprint for space-constrained portable designs with exposed pad thermal performance. |
| Temperature Range | -40°C to +85°C - fully specified across industrial temperature range for embedded and POS equipment reliability. |
Pinout & Package
MAX16036LLB31+ uses a 10-pin µDFN package (L1022-1 code) with wettable flank leads and exposed thermal pad. Pin 1 is marked by dot; pin numbering follows standard counter-clockwise layout from top-left corner.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low push-pull reset output; sinks 20mA, valid down to 1.2V VCC; asserts during brownout, RESETIN low, or power-up. |
| 2 | CEIN | Chip-enable input; controls CEOUT pass gate; high-impedance when reset asserted; internal 20kΩ pullup to VCC if unused. |
| 3 | PFI | Power-fail input; referenced to 1.235V; triggers PFO low when voltage drops below threshold; supports external voltage monitoring. |
| 4 | GND | System ground reference; connects to exposed thermal pad for optimal thermal dissipation and noise immunity. |
| 5 | RESETIN | Auxiliary reset input; comparator input referenced to 1.235V; asserts RESET when voltage falls below threshold; <25nA input bias. |
| 6 | PFO | Active-low push-pull power-fail output; asserts when PFI < 1.235V or VCC < reset threshold; VOL ≤0.4V @ 1.6mA. |
| 7 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and sources OUT during normal operation. |
| 8 | OUT | Output rail; sourced from VCC when active, switches to BATT during backup; supports up to 200mA load. |
| 9 | BATT | Backup battery input; supplies OUT when VCC < 3.08V and VBATT > VCC + 40mV; reverse-current protected. |
| 10 | CEOUT | Chip-enable output; passes CEIN signal when reset deasserted; actively pulled to OUT when disconnected; <100Ω on-resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Auxiliary RESETIN Input | 1.235V precision comparator enables monitoring of secondary supplies (e.g., 2.5V, 1.8V rails) using two external resistors - no additional ICs required. |
| Chip-Enable Gating | Sub-10ns CEIN-to-CEOUT propagation delay with 100Ω on-resistance prevents SRAM write corruption during brownout - eliminates need for external logic. |
| Battery Switchover | Automatic VCC/BATT switching with 40mV hysteresis prevents oscillation during slow VCC decay - ensures seamless RAM retention without software intervention. |
| Low-Power Operation | 13µA typical ICC at 5.5V and 2µA battery standby current enable >10-year shelf life in coin-cell powered devices. |
| Power-Fail Warning | Dedicated PFI/PFO path with 1.235V threshold and 4µs response time provides early NMI interrupt before system reset - improves fault logging capability. |
Applications
| Portable Medical Sensors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Wearable ECG monitor with nonvolatile SRAM storing calibration data and last-measurement timestamp during battery replacement. IC Role / Device Role / Timing Role: MAX16036LLB31+ monitors main 3.3V rail and asserts RESET while switching OUT to backup coin cell; RESETIN monitors 1.8V sensor bias rail. Use Value: Ensures zero-data-loss SRAM retention during hot-swap battery events and prevents corrupted writes during 3.3V brownout. |
Use Scenario: DIN-rail mounted PLC module operating in factory environments with fluctuating 24VDC input causing 3.3V regulator brownouts. IC Role / Device Role / Timing Role: MAX16036LLB31+ provides 140ms guaranteed reset hold time and CEIN/CEOUT gating to freeze I/O register writes during undervoltage. Use Value: Eliminates spurious digital output toggling and analog DAC glitches caused by partial µP execution during power sag. |
| Retail POS Terminals | Smart Energy Meters |
Use Scenario: Battery-backed receipt printer with real-time clock and transaction log memory requiring integrity across AC power interruptions. IC Role / Device Role / Timing Role: MAX16036LLB31+ uses PFI to monitor unregulated 12V DC input and RESETIN to supervise 5V RTC supply; triggers PFO interrupt for graceful shutdown. Use Value: Enables deterministic firmware save sequence before power loss, preventing partial transaction records and EEPROM wear-out. |
Use Scenario: Electricity meter with supercapacitor backup maintaining metrology registers and tamper logs during grid outages. IC Role / Device Role / Timing Role: MAX16036LLB31+ switches OUT to supercap when 3.3V rail drops below 3.08V; RESETIN monitors 2.5V ADC reference stability. Use Value: Guarantees >10-second backup runtime with <2µA battery current, meeting IEC 62053-21 data retention requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar µP supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16036LLB29+ | Factory-set reset threshold 2.93V (±65mV) instead of 3.08V; identical pinout, timing, and feature set. | Suitable for 2.8V/3.0V systems where tighter margin below 3.08V is required; same industrial temp range and µDFN-10 package. | Select MAX16036LLB29+ when system VCC nominal is 2.8V and brownout must trigger before crossing 3.0V. |
| TPS3808G33DBVR | Single-channel supervisor with 3.3V reset threshold, no RESETIN or CE gating; 1.6µA IQ; SOT-23-6 package. | Lacks battery switchover, chip-enable control, and auxiliary reset input; suitable only for basic reset generation without backup management. | Choose TPS3808G33DBVR only for cost-sensitive applications needing only reset assertion - not a functional substitute for MAX16036LLB31+. |
Compared with MAX16036LLB29+, MAX16036LLB31+ offers higher reset threshold for improved noise margin in 3.3V systems; compared with TPS3808G33DBVR, it provides integrated battery management and dual-supply monitoring essential for SRAM backup integrity.
Availability
MAX16036LLB31+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, retail POS terminals, and smart energy meters requiring stable component supply with long-term lifecycle support.
Supply support for MAX16036LLB31+ 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 interface applications in industrial, automotive, and communications markets.
The MAX16033–MAX16040 family was engineered specifically for µP-based systems requiring integrated battery backup, power-fail warning, and chip-enable protection - targeting space-constrained portable and industrial equipment.
FAQ
What is the factory-set reset threshold voltage for MAX16036LLB31+?
The MAX16036LLB31+ has a factory-trimmed reset threshold of 3.08V with ±70mV tolerance over -40°C to +85°C. This value is laser-trimmed during production and applies to VCC falling edge detection. The threshold remains stable across temperature, with normalized variation <±0.3% from -40°C to +85°C per the typical operating characteristics graph (toc07).
How does the RESETIN input function in MAX16036LLB31+?
The RESETIN input in MAX16036LLB31+ connects to an internal 1.235V comparator. When voltage at RESETIN falls below 1.235V ±50mV, RESET asserts immediately. The input draws <25nA, allowing use of high-value resistor dividers (e.g., 1MΩ) for secondary supply monitoring without accuracy loss. Propagation delay from RESETIN recovery to RESET deassertion is 1.5µs min.
Can MAX16036LLB31+ operate with VCC as low as 1.2V?
Yes, MAX16036LLB31+ guarantees active-low RESET output functionality down to VCC = 1.2V, including valid VOL ≤0.4V at ISINK = 100µA. The device maintains all supervisory functions - including RESETIN comparison, PFI monitoring, and CEIN/CEOUT gating - across the full 1.2V to 5.5V supply range, enabling robust operation during deep brownout.
What is the maximum load current supported by the OUT pin of MAX16036LLB31+?
The OUT pin of MAX16036LLB31+ supports up to 200mA when sourced from VCC under normal operation. In battery-backup mode, the internal MOSFET delivers load current limited by BATT voltage and temperature-dependent on-resistance (e.g., 4.6Ω at 2.5V, 25°C). Short-circuit protection limits continuous current to safe levels without latch-up.
Does MAX16036LLB31+ include watchdog timer functionality?
No, MAX16036LLB31+ does not include watchdog timer functionality. Per the Selector Guide and Pin Description table, watchdog input (WDI) is only present on MAX16034/MAX16038 variants. MAX16036LLB31+ belongs to the RESETIN-equipped subgroup (MAX16036/MAX16040) and omits WDI, MR, and BATTON pins to optimize pin count for its specific supervisory role.
MAX16036LLB31+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-µDFN (2x2)
MAX16036LLB31+ FAQ
1.How can I place an order for MAX16036LLB31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16036LLB31+ 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 MAX16036LLB31+ reliable?
The price and inventory of MAX16036LLB31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16036LLB31+ is usually 5 days.
3.What payment methods are accepted for MAX16036LLB31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16036LLB31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16036LLB31+?
MAX16036LLB31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16036LLB31+ 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 MAX16036LLB31+?
For technical support, including MAX16036LLB31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16036LLB31+ requirements.
6.How does Aetrix verify that MAX16036LLB31+ is sourced from the original manufacturer or authorized distributors?
All MAX16036LLB31+ 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 MAX16036LLB31+ meets industry standards.
7.What is the process for return or replacement of MAX16036LLB31+?
All MAX16036LLB31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16036LLB31+, 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 MAX16036LLB31+ part is unused and in its original packaging.
Return procedure for MAX16036LLB31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16036LLB31+ Tags
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MIC826SYMT-TR
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