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Analog Devices Inc./Maxim Integrated MAX16035PLB31+T
- Part No.:
- MAX16035PLB31+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16035PLB31+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,859
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Product details
Overview
The MAX16035PLB31+T from Maxim Integrated is a low-power microprocessor supervisory circuit with battery-switchover, active-low open-drain reset, 3.08V factory-set reset threshold, and battery-on (BATTON) indicator output. It operates from 1.2V to 5.5V, draws only 13µA quiescent current, and delivers reliable power monitoring for SRAM backup in portable and industrial μP systems.
For engineers reviewing the MAX16035PLB31+T datasheet, MAX16035PLB31+T pinout, MAX16035PLB31+T application, or MAX16035PLB31+T equivalent, key selection criteria include its 3.08V reset threshold accuracy, BATTON push-pull status indication, 140ms minimum reset timeout, and 10-pin µDFN package compatibility with space-constrained designs.
Technical Context
The MAX16035PLB31+T implements a precision voltage-monitoring architecture with independent power-fail comparator (1.235V PFI threshold), integrated battery switchover MOSFET (RON ≤ 4.6Ω at 2.5V), and dedicated BATTON output that asserts high during backup mode. Its reset generator guarantees valid reset assertion down to 1.2V VCC and includes transient immunity validated up to 10V/ms slew rate.
This variant belongs to the MAX16035 family - defined by MR input omission, inclusion of BATTON output, and 10-pin µDFN-10 packaging. It lacks manual-reset (MR), watchdog (WDI), and auxiliary RESETIN inputs, distinguishing it from MAX16033/MAX16034/MAX16036 variants while retaining full PFI/PFO, CEIN/CEOUT gating, and VCC-to-OUT switching functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V to 3.15V (factory-set at 3.08V); ensures precise brownout detection for 3.3V/3.0V supply rails |
| Reset Output Type | Active-low open-drain; enables wired-OR configuration and flexible pull-up voltage selection |
| Quiescent Current | 13µA typical at 2.8V; supports ultra-low-power battery-backed memory retention |
| Battery-On Output | BATTON pushes high during backup mode; provides unambiguous system-level battery-active status signal |
| Operating Voltage Range | 1.2V to 5.5V; allows direct interface with Li-ion, coin-cell, and supercapacitor backup sources |
| Reset Timeout Period | 140ms minimum; meets JEDEC JESD78 reliability requirements for μP initialization stability |
| Package | 10-pin µDFN (2mm × 2mm, 0.5mm pitch); enables high-density PCB layout in portable equipment |
Pinout & Package
MAX16035PLB31+T is housed in a 10-pin, 2mm × 2mm, 0.5mm-pitch µDFN package with wettable flanks, rated for -40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low open-drain reset output | Asserts low when VCC < 3.08V, holds for ≥140ms after recovery; requires external pull-up |
| 2 - CEIN | Chip-enable input | Controls CEOUT pass-gate; disabled during reset to prevent RAM corruption during brownout |
| 3 - PFI | Power-fail input | Monitors secondary supply via resistor divider; trips PFO at 1.235V falling threshold |
| 4 - GND | Ground reference | Common return for all analog and digital functions; must be low-impedance connection |
| 5 - PFO | Active-low power-fail output | Drives low when PFI < 1.235V or VCC < reset threshold; open-drain, requires pull-up |
| 6 - VCC | Main supply input | Primary power source (1.2–5.5V); powers internal circuitry and supplies OUT when above reset threshold |
| 7 - OUT | Output rail | Switches between VCC and BATT; delivers up to 200mA from VCC, >20mA from battery |
| 8 - BATT | Battery backup input | Accepts 2.1–5.5V backup source; connects to OUT when VCC falls below reset threshold + hysteresis |
| 9 - CEOUT | Chip-enable output | Passes CEIN signal during normal operation; held high during reset to freeze memory access |
| 10 - NC | No connect | Internally unused; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Battery-on (BATTON) indicator | Push-pull output asserting high during battery-backup mode; eliminates need for external status LED driver |
| Independent power-fail comparator | Dedicated 1.235V PFI threshold with 1% hysteresis; enables early warning of secondary supply failure without affecting main reset path |
| Low 13µA quiescent current | Minimizes battery drain in always-on backup applications; extends coin-cell life beyond 5 years at 3V |
| VCC-to-RESET propagation delay | ≤25µs at 10V/ms VCC fall rate; ensures fast, deterministic response to rapid supply collapse |
| Power-supply transient immunity | Validated against 100ns–10µs glitches up to 10V/ms; prevents spurious resets in noisy industrial environments |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Battery-powered ECG or glucose meter retains SRAM data during AC power loss or battery swap. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail and switches SRAM supply to coin-cell backup; BATTON signals active backup mode to MCU. Use Value: Guarantees zero-data-loss memory retention with 140ms reset hold time and <4.6Ω battery-switch resistance. | Use Scenario: Programmable logic controller maintains real-time clock and configuration registers during 24VDC supply interruption. IC Role / Device Role / Timing Role: Provides brownout detection on 5V logic rail and gates CE signal to prevent corrupted writes during voltage sag. Use Value: CEIN/CEOUT transmission gate blocks erroneous memory access with <2ns propagation delay and <1µA leakage. |
| Retail Point-of-Sale Terminals | Smart Energy Meters |
Use Scenario: POS terminal preserves transaction buffer and cryptographic keys during brief mains dropout or battery depletion. IC Role / Device Role / Timing Role: Resets μP on 3.3V rail collapse and asserts BATTON to trigger firmware-safe shutdown sequence. Use Value: Factory-trimmed 3.08V threshold ensures accurate trip point across temperature; open-drain RESET supports shared bus reset topology. | Use Scenario: Electricity meter retains time-of-use billing data and tamper logs during extended utility outage. IC Role / Device Role / Timing Role: Monitors both 3.3V logic rail and 12V backup capacitor bank via PFI divider; triggers PFO interrupt before VCC drops below reset threshold. Use Value: Dual-threshold monitoring (VCC reset + PFI warning) enables staged response: log flush → safe sleep → SRAM backup activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16035LLB31+T | Push-pull RESET output instead of open-drain; identical reset threshold, BATTON, and pinout | Requires no external pull-up; unsuitable for wired-OR reset buses | Select when single-point reset drive is preferred and board layout prohibits pull-up resistors |
| MAX16039PLB31+T | 8-pin µDFN package (vs. 10-pin); omits CEIN/CEOUT gating; retains BATTON and same reset threshold | Lacks chip-enable signal protection; used where RAM write-protection during brownout is not required | Select for cost- and area-sensitive designs where CE gating is unnecessary and smaller footprint is critical |
Compared with MAX16035LLB31+T, the MAX16035PLB31+T offers flexible reset bus interfacing but requires an external pull-up; versus MAX16039PLB31+T, it adds robust CE signal gating at the cost of two extra pins and larger package - essential for systems requiring guaranteed SRAM write integrity during power transitions.
Availability
MAX16035PLB31+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, retail point-of-sale terminals, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for MAX16035PLB31+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, sensing, and connectivity applications in industrial, automotive, and computing markets.
The MAX16033–MAX16040 product line delivers integrated battery-backup supervisory circuits optimized for SRAM retention in space-constrained, low-power μP systems - emphasizing accuracy, ultra-low quiescent current, and robust transient immunity.
FAQ
What is the factory-set reset threshold voltage for the MAX16035PLB31+T?
The MAX16035PLB31+T has a factory-set reset threshold of 3.08V, with guaranteed range 3.00V to 3.15V over -40°C to +85°C. This value is laser-trimmed during production and applies specifically to the "31" suffix variant, enabling precise brownout detection for 3.3V and 3.0V supply rails without external resistor networks.
Does the MAX16035PLB31+T support battery backup for SRAM, and how does the switchover work?
Yes, the MAX16035PLB31+T automatically switches OUT from VCC to BATT when VCC falls below the 3.08V reset threshold and VBATT exceeds VCC by ≥40mV. During switchover, BATTON asserts high to signal backup mode, and the internal MOSFET delivers up to 20mA from battery with ≤4.6Ω on-resistance at 2.5V - ensuring uninterrupted SRAM power with minimal voltage drop.
What is the function of the BATTON output on the MAX16035PLB31+T?
The BATTON output on the MAX16035PLB31+T is a push-pull indicator that drives high exclusively during battery-backup mode - i.e., when VCC is below the reset threshold and BATT is actively supplying OUT. It sinks 3.2mA at 0.4V saturation and can directly drive LEDs or base terminals of external pass transistors, providing unambiguous system-level status without polling or software overhead.
Can the MAX16035PLB31+T be used without a backup battery?
Yes, the MAX16035PLB31+T operates normally without a backup battery: connect BATT to GND and tie OUT to VCC. In this configuration, it retains full reset supervision, power-fail warning (PFI/PFO), and chip-enable gating functionality. The device will not enter backup mode, and BATTON remains low - making it suitable for cost-sensitive applications where battery retention is unnecessary.
What are the absolute maximum ratings for VCC and BATT on the MAX16035PLB31+T?
The MAX16035PLB31+T specifies absolute maximum ratings of -0.3V to +6V for VCC and BATT terminals relative to GND. Continuous VCC current is rated at 250mA, while BATT continuous current is limited to 40mA. Exceeding these limits risks permanent damage; design margins should maintain VCC/BATT ≤5.5V and respect thermal dissipation limits of 402.8mW at +70°C ambient.
MAX16035PLB31+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 3.08V
- 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:
- 10-µDFN (2x2)
MAX16035PLB31+T FAQ
1.How can I place an order for MAX16035PLB31+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16035PLB31+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 MAX16035PLB31+T reliable?
The price and inventory of MAX16035PLB31+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16035PLB31+T is usually 5 days.
3.What payment methods are accepted for MAX16035PLB31+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16035PLB31+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16035PLB31+T?
MAX16035PLB31+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16035PLB31+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 MAX16035PLB31+T?
For technical support, including MAX16035PLB31+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16035PLB31+T requirements.
6.How does Aetrix verify that MAX16035PLB31+T is sourced from the original manufacturer or authorized distributors?
All MAX16035PLB31+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 MAX16035PLB31+T meets industry standards.
7.What is the process for return or replacement of MAX16035PLB31+T?
All MAX16035PLB31+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16035PLB31+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 MAX16035PLB31+T part is unused and in its original packaging.
Return procedure for MAX16035PLB31+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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