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Analog Devices Inc./Maxim Integrated MAX16035PLB46+
- Part No.:
- MAX16035PLB46+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16035PLB46+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,471
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Product details
Overview
The MAX16035PLB46+ from Maxim Integrated is a low-power, 10-pin μDFN supervisory IC designed for battery-backed SRAM retention and μP reset control in portable and industrial systems. It features a factory-set 4.63V reset threshold (L_46 variant), active-low open-drain RESET and PFO outputs, and a dedicated BATTON indicator output that asserts high during battery backup mode. It operates from 1.2V to 5.5V and draws only 13µA quiescent current at 2.8V.
For engineers reviewing the MAX16035PLB46+ datasheet, MAX16035PLB46+ pinout, MAX16035PLB46+ application, or MAX16035PLB46+ equivalent, key selection criteria include its 4.63V reset threshold accuracy, 140ms minimum reset timeout, battery-switchover hysteresis (40mV), BATTON push-pull drive capability (3.2mA sink), and operation down to 1.2V supply voltage - all critical for reliable brownout recovery and nonvolatile memory protection.
Technical Context
The MAX16035PLB46+ implements a precision reset generator with a fixed 4.63V ±0.13V threshold (VTH), independent power-fail comparator referenced to 1.235V (VPFI), and integrated battery switchover MOSFET with <4.6Ω VCC-to-OUT on-resistance at 2.5V. Its BATTON output is a dedicated push-pull driver activated exclusively when VCC falls below VTH and VBATT > VCC + 40mV.
This device belongs to the MAX16033–MAX16040 family where the "35" suffix denotes inclusion of BATTON functionality and exclusion of MR, WDI, and RESETIN inputs. Unlike variants with manual reset or watchdog, MAX16035PLB46+ focuses on autonomous power monitoring and battery status indication without external intervention logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-set L_46 variant); ensures reliable reset assertion before 5V system brownout. |
| Reset Timeout Period | 140ms (min); guarantees μP remains held in reset long enough for stable power recovery. |
| Supply Current | 13µA typical at 2.8V; enables multi-year battery backup life in always-on instrumentation. |
| BATTON Output Drive | 3.2mA sink at 0.4V VOL; directly drives LEDs or base of external pass transistors for higher-current backup switching. |
| Operating Voltage Range | 1.2V to 5.5V; supports reset assertion even during deep brownout down to single-cell LiFePO₄ or coin-cell levels. |
| Battery Switchover Hysteresis | 40mV; prevents oscillation during slow VCC decay by requiring VBATT > VCC + 40mV to engage backup. |
| Package | 10-pin µDFN (2mm × 2mm, 0.5mm pitch); enables ultra-compact placement near SRAM or μP power domains. |
Pinout & Package
MAX16035PLB46+ is housed in a 10-pin, 2mm × 2mm, 0.5mm-pitch µDFN package with wettable flanks, RoHS-compliant and lead(Pb)-free (+ suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output; requires external pullup; asserts when VCC < 4.63V or during battery backup. |
| 2 | CEIN | Not connected (NC) in MAX16035; unused pin - must be left floating or tied to GND per layout guidelines. |
| 3 | PFI | Power-fail input; monitors auxiliary rail via resistor divider; trips PFO when voltage falls below 1.235V. |
| 4 | GND | Analog/digital ground reference; must be low-impedance connection to system ground plane. |
| 5 | MR | No-connect (NC) in MAX16035; not internally bonded - leave unconnected per datasheet pin map. |
| 6 | PFO | Active-low open-drain power-fail output; signals early warning of supply collapse before reset triggers. |
| 7 | VCC | Main supply input (1.2V–5.5V); powers internal circuitry and sources OUT during normal operation. |
| 8 | OUT | Switched output; sourced from VCC normally, automatically switches to BATT during backup mode. |
| 9 | BATT | Backup battery input; engages when VCC < VTH and VBATT > VCC + 40mV; supports 2.1V–5.5V batteries. |
| 10 | CEOUT | No-connect (NC) in MAX16035; unused pin - must be left floating or tied to GND. |
Key Features
| Feature | Design Value |
|---|---|
| BATTON Indicator Output | Dedicated push-pull signal that goes high only during valid battery backup - eliminates need for external logic to detect switchover state. |
| Ultra-Low Quiescent Current | 13µA at 2.8V enables >10-year shelf life on CR2032 when backing SRAM in sleep mode. |
| Reset Valid Down to 1.2V | Ensures deterministic reset behavior even with severely sagged supplies - critical for Li-ion/LiFePO₄-powered devices. |
| Independent Power-Fail Comparator | 1.235V reference allows monitoring of secondary rails (e.g., 3.3V, 2.5V) without affecting primary reset threshold. |
| Small 2mm × 2mm μDFN | Minimizes PCB area in space-constrained portable equipment while supporting automated optical inspection (AOI). |
Applications
| Portable Medical Monitors | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Continuous ECG/SpO₂ logging with SRAM retention during battery swaps or AC loss. IC Role / Device Role / Timing Role: Supervisory IC providing automatic battery switchover, reset hold, and BATTON-driven LED alert. Use Value: Prevents data loss during 100ms–500ms power gaps; BATTON signal confirms backup engagement without firmware polling. |
Use Scenario: Maintaining configuration and real-time clock state in DIN-rail mounted controllers during mains interruption. IC Role / Device Role / Timing Role: System-level power supervisor ensuring SRAM integrity and safe I/O shutdown sequencing. Use Value: 140ms reset timeout aligns with PLC watchdog requirements; 40mV switchover hysteresis avoids chatter during noisy 24VDC line sags. |
| Retail POS Terminals | Smart Energy Meters |
Use Scenario: Preserving transaction buffers and cryptographic keys during brief battery depletion or power cycling. IC Role / Device Role / Timing Role: Battery-backup manager with precise 4.63V reset threshold for 5V rail monitoring. Use Value: Factory-trimmed VTH eliminates calibration overhead; open-drain RESET/PFO simplifies interface to ARM Cortex-M reset controllers. |
Use Scenario: Securing metering registers and time-of-use data during grid outages using supercapacitor backup. IC Role / Device Role / Timing Role: Low-quiescent supervisor enabling >5-year supercap lifetime with 13µA ICC. Use Value: VCC-to-OUT on-resistance <4.6Ω at 2.5V minimizes voltage drop across backup path - preserving ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16035PLB31+ | Factory-set 3.08V reset threshold (L_31); identical pinout, BATTON function, and μDFN-10 package. | Suitable for 3.3V systems where 4.63V threshold is too high; same timing, current, and switchover specs. | Select when main supply is 3.3V and precise brownout detection near VCC nominal is required. |
| TPS3808G33DBVR | 3.3V fixed reset threshold; SOT-23-6 package; no BATTON output; no battery switchover; 1.8µA IQ. | Lacks battery backup management and status indication; intended for simple reset-only applications. | Choose only if battery backup is handled externally and board space permits larger SOT-23 footprint. |
Compared with MAX16035PLB31+ and TPS3808G33DBVR, the MAX16035PLB46+ uniquely delivers 4.63V precision reset + integrated battery switchover + BATTON status in a 2mm² footprint - making it irreplaceable for compact 5V portable designs requiring autonomous backup confirmation.
Availability
MAX16035PLB46+ is available at Aetrix Electronics and suitable for portable medical monitors, industrial PLC I/O modules, retail POS terminals, and smart energy meters requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX16035PLB46+ 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, space-constrained battery-backed memory systems - delivering integrated reset, power-fail warning, and switchover control in sub-4mm² packages.
FAQ
What is the exact reset threshold voltage of the MAX16035PLB46+?
The MAX16035PLB46+ has a factory-trimmed reset threshold of 4.63V (minimum 4.50V, maximum 4.75V) per the L_46 designation in its part number. This value is specified over the full -40°C to +85°C operating temperature range and exhibits less than 0.3% drift across temperature, ensuring consistent brownout detection in 5V systems.
Does the MAX16035PLB46+ support battery switchover, and what is the switchover hysteresis?
Yes, the MAX16035PLB46+ fully supports automatic battery switchover: when VCC falls below 4.63V and VBATT exceeds VCC by at least 40mV, the internal MOSFET connects BATT to OUT. The 40mV hysteresis prevents oscillation during slow VCC decay - a design feature confirmed in the Absolute Maximum Ratings and Typical Operating Characteristics sections of the MAX16035PLB46+ datasheet.
What is the function of the BATTON pin on the MAX16035PLB46+, and how is it driven?
The BATTON pin on the MAX16035PLB46+ is a push-pull output that asserts high exclusively during valid battery backup mode (i.e., when VCC < 4.63V and VBATT > VCC + 40mV). It sinks 3.2mA at 0.4V saturation and can source ~10µA from OUT - enabling direct LED driving or base control of external PNP transistors without additional level-shifting circuitry.
Can the MAX16035PLB46+ operate with supply voltages below 2.0V, and what is its minimum functional voltage?
Yes, the MAX16035PLB46+ operates down to 1.2V supply voltage - explicitly guaranteed in the Electrical Characteristics table. Its RESET output remains valid and asserted down to 1.2V, and the internal reset generator functions correctly at this level. This capability is essential for compatibility with low-voltage coin cells and deeply discharged lithium chemistries in maintenance-free portable devices.
Is the MAX16035PLB46+ pin-compatible with other members of the MAX16033–MAX16040 family?
The MAX16035PLB46+ shares the same 10-pin µDFN package and pinout with MAX16033/MAX16034/MAX16036 variants, but CEIN (pin 2), MR (pin 5), and CEOUT (pin 10) are no-connects in MAX16035PLB46+. While mechanical footprint is identical, functional pin mapping differs - e.g., MR and CEIN pins are unused and must remain unconnected, unlike in MAX16033PLB46+.
MAX16035PLB46+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Power Supply Monitor
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- 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)
MAX16035PLB46+ FAQ
1.How can I place an order for MAX16035PLB46+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16035PLB46+ 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 MAX16035PLB46+ reliable?
The price and inventory of MAX16035PLB46+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16035PLB46+ is usually 5 days.
3.What payment methods are accepted for MAX16035PLB46+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16035PLB46+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16035PLB46+?
MAX16035PLB46+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16035PLB46+ 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 MAX16035PLB46+?
For technical support, including MAX16035PLB46+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16035PLB46+ requirements.
6.How does Aetrix verify that MAX16035PLB46+ is sourced from the original manufacturer or authorized distributors?
All MAX16035PLB46+ 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 MAX16035PLB46+ meets industry standards.
7.What is the process for return or replacement of MAX16035PLB46+?
All MAX16035PLB46+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16035PLB46+, 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 MAX16035PLB46+ part is unused and in its original packaging.
Return procedure for MAX16035PLB46+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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