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Analog Devices Inc./Maxim Integrated MAX16036PLB31+
- Part No.:
- MAX16036PLB31+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16036PLB31+.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,330
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Product details
Overview
The MAX16036PLB31+ from Maxim Integrated is a low-power, 10-pin μDFN supervisory IC designed for battery-backed SRAM power management in microprocessor systems. It provides auxiliary adjustable-reset input (RESETIN), power-fail warning (PFI/PFO), active-low open-drain reset output, chip-enable gating, and backup-battery switchover - with factory-set 3.08V reset threshold, 140ms minimum reset timeout, and 13μA quiescent current. It is used in portable POS terminals and industrial controllers requiring reliable brownout protection and nonvolatile memory retention.
For engineers reviewing the MAX16036PLB31+ datasheet, MAX16036PLB31+ pinout, MAX16036PLB31+ application, or MAX16036PLB31+ equivalent, key selection criteria include its RESETIN comparator threshold (1.235V), open-drain reset structure, 10-pin μDFN-10 package compatibility, and support for dual-supply monitoring in battery-switchover mode.
Technical Context
The MAX16036PLB31+ integrates a precision 1.235V internal reference to compare external voltages at the RESETIN pin, asserting reset when input falls below threshold. Its chip-enable gating path (CEIN→CEOUT) remains functional during normal operation but disables on reset assertion to prevent erroneous writes to CMOS RAM during brownout.
It features an independent power-fail comparator monitoring PFI with 1.235V trip point and 1% hysteresis, driving PFO low upon failure. The device operates from 1.2V to 5.5V supply, supports battery backup with <2μA standby current, and guarantees reset validity down to 1.2V VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.00V (min), 3.08V (typ), 3.15V (max) - factory-trimmed voltage at which RESET asserts on VCC fall |
| RESETIN Threshold | 1.185V–1.285V - precise internal reference enables accurate secondary supply monitoring |
| Reset Timeout Period | 140ms (min), 280ms (max) - ensures μP completes power-up initialization before release |
| Quiescent Supply Current | 13μA (typ) at VCC = 2.8V - enables multi-year battery life in always-on backup mode |
| Output Type | Active-low open-drain RESET and PFO - allows wired-OR logic and level translation with external pull-ups |
| Operating Temperature | -40°C to +85°C - fully specified for industrial and embedded environments |
| Package | 10-pin μDFN (2mm × 2mm, 0.5mm pitch) - space-constrained PCBs in portable equipment |
Pinout & Package
MAX16036PLB31+ is housed in a 10-pin, 2mm × 2mm, 0.5mm-pitch μDFN package with exposed pad (EP). Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise convention starting from top-left corner when marking dot is oriented top-left.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RESET | Active-low open-drain reset output - asserted when VCC < VTH, RESETIN < 1.235V, or PFI < 1.235V; requires external pull-up |
| 2 | CEIN | Chip-enable input - controls CEOUT pass-gate; ignored during reset assertion |
| 3 | PFI | Power-fail input - referenced to 1.235V; falling edge triggers PFO low for early power-loss warning |
| 4 | GND | Ground reference - shared return for all analog and digital functions |
| 5 | MR | Manual-reset input - not used in MAX16036 (no internal pullup or debounce); leave unconnected or tie to VCC |
| 6 | PFO | Active-low open-drain power-fail output - mirrors PFI status; also asserts when VCC < VTH |
| 7 | VCC | Main supply input - powers internal circuitry; range 1.2V–5.5V; reset asserted if below 3.08V |
| 8 | OUT | Switched output - sourced from VCC normally, switches to BATT during backup mode (VCC < VTH and VCC < VBATT) |
| 9 | BATT | Backup battery input - supplies OUT when VCC fails; switchover hysteresis prevents chatter |
| 10 | CEOUT | Chip-enable output - low-impedance pass-through of CEIN when reset deasserted; pulled up to OUT when disconnected |
Key Features
| Feature | Design Value |
|---|---|
| Auxiliary RESETIN comparator | 1.235V internal reference enables user-configurable reset for secondary supplies via resistor divider |
| Open-drain RESET/PFO outputs | Supports flexible voltage-level interfacing and wired-OR bus architectures without contention |
| Chip-enable gating | Prevents spurious writes to SRAM during brownout by disabling CEIN→CEOUT path on reset assertion |
| Battery switchover control | Automatic MOSFET-based switching to BATT with <2μA standby current preserves battery life |
| Power-fail warning | Dedicated PFI/PFO path provides early interrupt before VCC drops below reset threshold |
Applications
| POS Terminal Power Management | Industrial Controller Brownout Protection |
|---|---|
|
Use Scenario: Battery-backed SRAM retains transaction logs during AC power loss in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC monitors main 3.3V rail and asserts RESET before voltage collapse; switches OUT to coin-cell battery to sustain SRAM. Use Value: Guarantees data integrity across >100,000 power cycles with no capacitor recharge delay or write corruption. |
Use Scenario: Programmable logic controller maintains real-time clock and configuration registers during factory line voltage sags. IC Role / Device Role / Timing Role: Uses RESETIN to monitor isolated 5V auxiliary supply; triggers reset if auxiliary fails while main 24V stays valid. Use Value: Enables fail-safe state preservation without requiring separate supervisor per supply domain. |
| Set-Top Box Memory Retention | Portable Medical Instrument Backup |
|
Use Scenario: Consumer set-top box retains channel lineup and parental lock settings after unplugging or grid outage. IC Role / Device Role / Timing Role: Provides 140ms minimum reset pulse and open-drain RESET to coordinate with SoC reset sequencing. Use Value: Eliminates need for external RC timing networks or discrete MOSFET switchover circuits. |
Use Scenario: Handheld ECG device uses supercapacitor backup to retain calibration data during battery replacement. IC Role / Device Role / Timing Role: Leverages low 13μA ICC and battery switchover to extend supercap runtime beyond 48 hours. Use Value: Reduces bill-of-materials by integrating switchover, reset, and power-fail detection in single 2mm×2mm package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16036LLB31+ | Push-pull RESET and PFO outputs instead of open-drain; same RESETIN, CEIN/CEOUT, and switchover functionality | Requires no external pull-up resistors; incompatible with wired-OR bus topologies | Select when driving CMOS inputs directly and board layout prohibits pull-up placement |
| TPS3808G33DBVR | Fixed 3.3V reset threshold; no RESETIN input or CE gating; only push-pull RESET; higher 20μA ICC | Lacks auxiliary supply monitoring and SRAM write-protection features; suitable for basic μP reset only | Choose for cost-sensitive designs where battery switchover and CE gating are unnecessary |
Compared with MAX16036LLB31+, the MAX16036PLB31+ offers greater interface flexibility via open-drain outputs, while TPS3808G33DBVR reduces feature set and increases supply current - making it a simpler but less capable alternative for non-backup applications.
Availability
MAX16036PLB31+ is available at Aetrix Electronics and suitable for portable POS terminals, industrial controllers, set-top boxes, and portable medical instruments requiring stable component supply and long-term lifecycle support.
Supply support for MAX16036PLB31+ 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 high-performance analog and mixed-signal ICs for power, sensing, and connectivity applications in industrial, automotive, and communications markets.
The MAX16033–MAX16040 family was engineered specifically for low-power, space-constrained battery-backed memory systems - delivering integrated reset, switchover, watchdog, and power-fail functions in sub-4mm² packages.
FAQ
What is the factory-set reset threshold voltage for MAX16036PLB31+?
The MAX16036PLB31+ has a factory-trimmed reset threshold of 3.00V (min), 3.08V (typ), and 3.15V (max), corresponding to the "31" suffix in the part number. This value is laser-trimmed during production and applies to the VCC supply monitoring function. The RESETIN input uses a separate 1.235V internal reference and is not affected by this threshold.
Does MAX16036PLB31+ support manual reset functionality?
No, the MAX16036PLB31+ does not include a manual-reset (MR) input. MR is only present on MAX16033/MAX16037 variants. Pin 5 of MAX16036PLB31+ is reserved and must be left unconnected or tied to VCC; it has no internal pullup or debounce circuitry.
How does the RESETIN input work on MAX16036PLB31+?
The RESETIN input on MAX16036PLB31+ compares an external voltage against a precision 1.185V–1.285V internal reference. When RESETIN falls below this threshold, RESET asserts for at least 140ms. It is intended for monitoring secondary supplies using a resistor divider - for example, setting VRTH = 5V via R1/R2 = 3.05 (with R2 = 100kΩ, R1 ≈ 305kΩ).
What is the maximum load current supported by the OUT pin of MAX16036PLB31+?
The OUT pin of MAX16036PLB31+ delivers up to 200mA from VCC under normal operation. In battery-backup mode (VCC < VTH), it sources current from BATT through an internal MOSFET with on-resistance ranging from 3.1Ω (at VCC = 4.75V) to 4.6Ω (at VCC = 2.5V), limiting practical continuous current to ~100mA depending on BATT voltage and thermal conditions.
Can MAX16036PLB31+ drive a standard CMOS microprocessor reset input directly?
Yes, but only with an external pull-up resistor. Because MAX16036PLB31+ features an open-drain RESET output, it requires a pull-up (typically 10kΩ to VCC) to generate a valid high-level signal for CMOS reset inputs. The output sinks up to 20mA when asserted, ensuring robust low-state drive into typical μP reset pins with 100pF–200pF capacitance.
MAX16036PLB31+ 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:
- 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)
MAX16036PLB31+ FAQ
1.How can I place an order for MAX16036PLB31+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16036PLB31+ 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 MAX16036PLB31+ reliable?
The price and inventory of MAX16036PLB31+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16036PLB31+ is usually 5 days.
3.What payment methods are accepted for MAX16036PLB31+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16036PLB31+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16036PLB31+?
MAX16036PLB31+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16036PLB31+ 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 MAX16036PLB31+?
For technical support, including MAX16036PLB31+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16036PLB31+ requirements.
6.How does Aetrix verify that MAX16036PLB31+ is sourced from the original manufacturer or authorized distributors?
All MAX16036PLB31+ 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 MAX16036PLB31+ meets industry standards.
7.What is the process for return or replacement of MAX16036PLB31+?
All MAX16036PLB31+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16036PLB31+, 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 MAX16036PLB31+ part is unused and in its original packaging.
Return procedure for MAX16036PLB31+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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