Analog Devices Inc./Maxim Integrated MAX16024PTBS18+

Overview

MAX16024PTBS18+ from Maxim Integrated is a low-power battery-backup circuit with integrated 1.8V LDO regulator, microprocessor reset supervisor, and battery switchover control. It delivers up to 100mA output current, features push-pull RESET, 2.93V reset threshold, and operates from 1.53V to 5.5V input. It is designed for SRAM/RTC backup in industrial GPS and point-of-sale equipment.

For engineers reviewing the MAX16024PTBS18+ datasheet, MAX16024PTBS18+ pinout, MAX16024PTBS18+ application, or MAX16024PTBS18+ equivalent, key selection considerations include its 10-pin TDFN package, battery-on indicator (BATT ON), CE signal gating with 1.5ns propagation delay, and adjustable-output capability via SET pin - critical for flexible voltage rail design in memory-retention systems.

Technical Context

The MAX16024PTBS18+ integrates a low-dropout linear regulator, precision reset supervisor with 145ms timeout, and battery switchover logic that activates when VCC falls below 2.93V, VCC < VBATT, and the LDO enters dropout. Its internal CE gating path disables CEIN-to-CEOUT conduction during reset assertion to prevent memory corruption.

It includes a dedicated SET pin for external resistive feedback (1.8V–5.25V output range), BATT ON active-high indicator signaling battery-backup mode, and factory-trimmed 1.8V output accuracy of ±2.5% (1.704V to 1.900V). All functions operate across –40°C to +85°C with UL® certification per IEC 60950-1.

Key Specifications

Pinout & Package

MAX16024PTBS18+ is housed in a 10-pin 3mm × 3mm TDFN-EP package with exposed pad (internally connected to GND) for thermal management. Pin 1 is VCC; pin 10 is CEOUT. The exposed pad must be soldered to a large ground plane but cannot serve as the sole GND connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery-backup supervisor applications.

Compared with MAX16024LTBS18+T, the open-drain RESET of MAX16024PTBS18+ allows wired-OR configurations and avoids contention on shared reset buses; versus TPS3808G33DBVR, MAX16024PTBS18+ integrates full backup power management - reducing BOM count by ≥4 components.

Availability

MAX16024PTBS18+ is available at Aetrix Electronics and suitable for industrial GPS systems, point-of-sale terminals, and portable medical monitors requiring stable component supply with long-term lifecycle assurance.

Supply support for MAX16024PTBS18+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.

The MAX16023/MAX16024 product line was engineered to consolidate SRAM/RTC backup power, reset supervision, and battery switchover into a single 10-pin package - targeting space-constrained, battery-dependent embedded systems.

FAQ

What is the function of the SET pin on MAX16024PTBS18+?

The SET pin on MAX16024PTBS18+ is used to configure the output voltage when operating in adjustable mode (1.8V–5.25V). For the MAX16024PTBS18+, however, it is configured for fixed 1.8V output - so SET must be connected to GND. Leaving SET floating may cause regulation instability or undefined output behavior. The internal 1.2V reference at SET enables precise external feedback scaling.

Does MAX16024PTBS18+ support battery switchover without external MOSFETs?

Yes, MAX16024PTBS18+ integrates fully autonomous battery switchover logic. When VCC drops below 2.93V, VCC falls below VBATT, and the LDO enters dropout, the device automatically transitions OUT supply from VCC to BATT - no external switches or control logic required. The battery freshness seal ensures BATT remains disconnected until first VCC power-up.

How does the CE gating feature of MAX16024PTBS18+ prevent memory corruption?

The CE gating in MAX16024PTBS18+ disconnects CEIN from CEOUT during reset assertion. If CEIN is low when reset triggers, CEOUT stays low for 12µs to complete the current memory cycle; then it goes high and remains latched. This prevents partial writes or reads during brownout - a critical safeguard for SRAM in industrial controllers where data integrity is non-negotiable.

What is the maximum continuous output current of MAX16024PTBS18+?

MAX16024PTBS18+ delivers up to 100mA continuous output current from its 1.8V LDO. This is sufficient for powering typical low-power SRAM (e.g., 256K×8) and RTC ICs (e.g., DS3231). Short-circuit protection limits fault duration to 10s; sustained overload beyond this risks permanent damage. Always use a 10µF low-ESR capacitor on OUT for stability.

Can MAX16024PTBS18+ be used without a backup battery?

Yes, MAX16024PTBS18+ functions as a standalone 1.8V supervisor/LDO even without a backup battery. In that case, connect the BATT pin to GND. The device will regulate OUT from VCC, assert RESET on brownout, and provide CE gating - all core supervision features remain fully operational. Battery-related pins (BATT ON, freshness seal) are simply inactive.