Analog Devices Inc./Maxim Integrated MAX16016PTBV+

Overview

MAX16016PTBV+ from Maxim Integrated is a low-power microprocessor supervisory circuit with integrated battery-backup switchover, chip-enable (CE) gating, and power-fail monitoring. It provides active-low reset output, 145ms minimum timeout, 1.2µA supply current, and operates from 1.53V to 5.5V to protect SRAM/RTC in brownout conditions. Used in GPS modules and point-of-sale terminals for reliable memory write protection during main power loss.

For engineers reviewing the MAX16016PTBV+ datasheet, MAX16016PTBV+ pinout, MAX16016PTBV+ application, or MAX16016PTBV+ equivalent, key selection criteria include reset threshold tolerance (±1.5% over temperature), battery-freshness seal functionality, VCC-to-OUT on-resistance (2.6Ω typ at 1.91V), and UL® certification to IEC 60950-1 for safety-critical industrial designs.

Technical Context

The MAX16016PTBV+ integrates four core supervisory functions: µP reset generation during VCC power-up/down/brownout; automatic VCC-to-battery switchover when VCC falls below reset threshold and VBATT > VCC; internal CE gating to prevent memory corruption; and power-fail detection with 0.590V PFI threshold and 30mV hysteresis. Its architecture includes a precision bandgap reference, debounced manual reset input with 30kΩ internal pullup, and watchdog timer with 1.235s typical timeout.

It implements a dual-path power switch: OUT connects to VCC during normal operation and switches to BATT only when RESET is asserted and VBATT exceeds VCC by >0mV (falling) or >0.1×VCC (rising). The device uses a dedicated low-leakage MOSFET switch (BATT standby current < ±10nA) and supports battery-test signaling via BATTON high-state indication in backup mode.

Key Specifications

Pinout & Package

MAX16016PTBV+ is housed in a 10-pin TDFN-EP package (3mm × 3mm, 0.8mm height) with exposed pad connected to GND for thermal dissipation. Pin 1 is VCC; Pin 10 is OUT; EP is internally tied to GND and must be soldered to a large ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Compared with MAX16016PTBV+, MAX16020PTEZ+ adds critical CE control and diagnostic features but requires PCB redesign, while TPS3808G33DBVR reduces functionality to basic reset-making MAX16016PTBV+ the optimal balance of integration, footprint, and battery-aware supervision for compact industrial devices.

Availability

MAX16016PTBV+ is available at Aetrix Electronics and suitable for GPS receivers, point-of-sale terminals, and industrial PLC modules requiring stable component supply with guaranteed long-term availability and RoHS-compliant packaging.

Supply support for MAX16016PTBV+ 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 industrial, communications, and computing applications, with emphasis on power efficiency and reliability.

The MAX16016PTBV+ belongs to Maxim's µP supervisory product line, engineered specifically for memory-critical systems requiring coordinated reset, battery switchover, and power-fail warning in minimal footprint.

FAQ

What is the reset threshold voltage for MAX16016PTBV+ and how does it vary with temperature?

The MAX16016PTBV+ has a nominal reset threshold of 2.32V (typical), with ±1.5% variation across -40°C to +85°C per the datasheet's normalized threshold vs. temperature plot (toc10). This tight tolerance ensures consistent brownout detection in 2.5V systems without requiring external trimming. The MAX16016PTBV+ achieves this stability through an on-chip bandgap reference and curvature-compensated design, eliminating need for external resistor dividers.

Does MAX16016PTBV+ support battery-backed SRAM write protection during power failure?

Yes, MAX16016PTBV+ provides hardware-level write protection by asserting RESET and disconnecting CE paths during brownout. While MAX16016PTBV+ itself does not include CEIN/CEOUT pins (unlike MAX16020/MAX16021), its RESET output can drive external CE gating logic or directly disable memory write-enable lines. The 145ms reset timeout ensures sufficient hold time for SRAM data retention during switchover to battery power.

How does the battery-freshness seal feature work in MAX16016PTBV+?

The MAX16016PTBV+ incorporates a battery-freshness seal that limits leakage current to ≤20nA at VBATT = 5.5V, preserving backup cell capacity during long-term storage. This is implemented via a precision low-leakage MOSFET switch and internal charge-pump isolation. For MAX16016PTBV+, this enables >10-year shelf life for lithium coin cells used in RTC backup, verified under JEDEC J-STD-020 moisture sensitivity level 3 conditions.

Can MAX16016PTBV+ monitor power supplies below 1.8V?

No, MAX16016PTBV+ is specified for monitoring 1.8V, 2.5V, 3.0V, 3.3V, and 5V systems only - its reset threshold options (Table 1a) start at 1.514V (suffix V) and do not extend below that. The PFI comparator accepts inputs down to 0.6V, but that serves as a separate power-fail alert, not a primary reset source. For sub-1.5V rail monitoring, a discrete comparator or alternative supervisor like MAX6369 must be used alongside MAX16016PTBV+.

What is the maximum continuous current supported by the OUT pin of MAX16016PTBV+?

The MAX16016PTBV+ OUT pin supports up to 70mA continuous current from the battery path and 250mA from VCC, as specified in Absolute Maximum Ratings. In practice, the VCC-to-OUT on-resistance (2.6Ω typ) limits usable current to ~25mA at 1.91V to maintain <100mV dropout. For higher loads, external FET buffering is recommended - the MAX16016PTBV+ is optimized for low-power SRAM/RTC backup, not main system power delivery.