Analog Devices Inc./Maxim Integrated MAX6788TA+

Overview

MAX6788TA+ from Maxim Integrated is a dual-level, 1% accurate battery monitor IC for portable systems requiring precise low-battery detection with adjustable hysteresis. It features one push-pull and one open-drain output, operates from 1.2V to 5.5V supply, consumes only 5.7µA at 1.8V, and supports external threshold setting via LBL1/LBH1 and LBL2/LBH2 inputs. It is used in single-cell Li+ or multicell alkaline/NiMH devices to trigger graceful shutdown or power-mode transitions.

For engineers reviewing the MAX6788TA+ datasheet, MAX6788TA+ pinout, MAX6788TA+ application, or MAX6788TA+ equivalent, key selection criteria include dual independent trip thresholds with user-defined rising/falling levels, mixed-output topology enabling flexible system-level logic interfacing, guaranteed valid output down to VBATT = 1.05V, reverse-battery protection capability, and operation across –40°C to +85°C.

Technical Context

The MAX6788TA+ implements two independent comparator channels, each with separately configurable falling (LBLx) and rising (LBHx) input thresholds referenced to an internal 0.6085V bandgap reference. Hysteresis is fully external-set by resistive dividers on LBLx/LBHx-enabling precise control of voltage recovery margins without factory trimming.

Its dual-output architecture combines LBO1 (push-pull) and LBO2 (open-drain), allowing direct connection to microcontroller GPIOs (LBO1) and wired-OR fault buses or level-shifted logic (LBO2). The device guarantees propagation delay ≤30µs and maintains threshold accuracy over full temperature range with ±15ppm/°C reference tempco.

Key Specifications

Pinout & Package

MAX6788TA+ is housed in an 8-pin TDFN package (2mm × 2mm, 0.5mm pitch) with exposed pad (EP) connected to GND. Pin 1 is LBL1; pin 2 is LBH1; pin 3 is LBL2; pin 4 is LBH2; pin 5 is GND; pin 6 is LBO2 (open-drain); pin 7 is LBO1 (push-pull); pin 8 is BATT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-level battery monitor applications.

Compared with MAX6786TA+ and MAX6787TA+, the MAX6788TA+ uniquely delivers mixed-output capability in the same 8-pin TDFN footprint - enabling direct MCU interface and system-level fault aggregation without added discretes or layout changes.

Availability

MAX6788TA+ is available at Aetrix Electronics and suitable for portable medical monitors, wireless audio devices, smart toys, and handheld industrial tools requiring stable component supply with long-term lifecycle assurance.

Supply support for MAX6788TA+ 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 interface applications in portable, industrial, and automotive markets.

The MAX6782–MAX6790 family was developed specifically for ultra-low-power, high-accuracy battery monitoring in space-constrained portable electronics - emphasizing 1% threshold stability, sub-6µA quiescent current, and flexible hysteresis architectures.

FAQ

What is the supply voltage range for MAX6788TA+ and how does it affect low-battery detection?

The MAX6788TA+ operates from 1.2V to 5.5V and guarantees correct LBO logic states down to VBATT = 1.05V. This allows reliable detection even as the battery approaches end-of-life, ensuring controlled shutdown before system reset or data corruption occurs. Its internal reference and comparators remain functional and accurate across this full range, making MAX6788TA+ suitable for deep-discharge monitoring in Li+ and alkaline systems.

How do I configure independent hysteresis for each channel on MAX6788TA+?

Each channel uses separate LBLx (falling) and LBHx (rising) inputs - connect each to its own resistive divider from BATT to GND. The voltage difference between LBL1 and LBH1 sets hysteresis for LBO1; similarly for LBL2/LBH2 and LBO2. No shared components are needed. MAX6788TA+ does not require REF or HADJ pins, unlike earlier family members - simplifying layout and reducing parts count.

Can MAX6788TA+ be used with reverse battery connection?

Yes - MAX6788TA+ supports reverse-battery protection when configured per the datasheet (Figure 6a/b): all LBL/LBH inputs must connect to the center node of a resistive divider between BATT and GND, with Thevenin impedance ≥1kΩ. This limits reverse current and prevents latch-up or damage. MAX6788TA+ itself remains functional and protects only its own circuitry - external components require separate protection.

What is the maximum sink/source capability of the LBO outputs on MAX6788TA+?

LBO1 (push-pull) sources up to 500µA at VBATT ≥ 2.7V and sinks up to 1.2mA at VBATT ≥ 2.7V. LBO2 (open-drain) sinks up to 100µA at VBATT ≥ 1.2V and supports external pullup to voltages up to +6V - enabling level-shifting beyond the BATT rail. Both outputs maintain specified VOL/VOH across –40°C to +85°C.

Does MAX6788TA+ require an external reference or bypass capacitor?

No - MAX6788TA+ integrates a 0.6085V bandgap reference and requires no external reference. A 0.1µF ceramic capacitor from BATT to GND is recommended for noise immunity but is not mandatory for stability. The reference is stable with capacitive loads ≤50pF; adding larger caps may degrade transient response but improves noise rejection in high-EMI environments.