MAX6791

PRODUCTION

High-Voltage, Micropower, Single/Dual Linear Regulators with Supervisory Functions

Automotive Linear Regulators with Supervisory Features

Data Sheet (Rev. 3) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.53

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Overview

Low 68µA Quiescent Current
Wide 5V to 72V Supply Voltage Range
Output Current
- Single Output Up to 300mA
- Dual Outputs Up to 150mA per Output
Low Dropout Voltage
- 420mV (typ) at 100mA (Single)
- 840mV (typ) at 100mA (Dual)
Fixed Output-Voltage Options: 5V, 3.3V, 2.5V, 1.8V, or Adjustable Output (from 1.8V to 11V)
ENABLE and HOLD Functionality
Active-Low RESET Output: Open Drain or Push-Pull
Internally Fixed (35µs, 3.125ms, 12.5ms, 50ms, or 200ms) or Capacitor-Adjustable Reset Timeout Periods
Internally Fixed or Capacitor-Adjustable Watchdog Timeout Periods
Windowed (Minimum/Maximum) Watchdog Timer Options (MAX6791/MAX6792)
Watchdog Disable Feature
Thermal, Short-Circuit, and Output Overvoltage Protection
Fully Specified from -40°C to +125°C
Small, Thermally Enhanced, 5mm x 5mm TQFN
AEC-Q100 Qualified MAX6795TPLD2/V+, MAX6795TPSD2/V+

The MAX6791–MAX6796 ultra-low-quiescent-current, single-/dual-output linear regulators are ideal for automotive applications. The devices offer a wide 5V to 72V operating input range, allowing them to withstand automotive load-dump conditions while consuming only 68µA. The MAX6791–MAX6794 are dual-output regulators capable of supplying up to 150mA per output. The MAX6795/MAX6796 offer a single output capable of delivering up to 300mA. These devices offer standard output-voltage options (5V, 3.3V, 2.5V, or 1.8V) and can be adjusted to any voltage from 1.8V to 11V. The MAX6791–MAX6794 also offer a fixed 5V output.

All devices feature a push-pull or open-drain, active-low RESET output with a fixed output reset threshold that is 92.5%/87.5% of the regulator output OUT/OUT1. The reset output asserts low when OUT/OUT1 drops below the reset threshold and remains low for the fixed or capacitor-adjustable reset timeout period after OUT/OUT1 exceeds the reset threshold.

The MAX6791–MAX6796 provide a watchdog input that monitors a pulse train from the microprocessor (µP) and generates reset pulses if the watchdog input remains high or low for a duration longer than the watchdog timeout period. All devices are available with either a fixed watchdog timeout period of 280ms (min) or a period adjustable with an external capacitor. The MAX6791/MAX6792 feature a windowed watchdog timeout period with selectable window ratio. The watchdog feature can be disabled.

The MAX6791–MAX6794 provide dual enable inputs (ENABLE1 and ENABLE2) that control each regulator independently. The single-output MAX6795/MAX6796 feature one enable input (ENABLE).

All devices include a hold input (active-low HOLD) that aids the implementation of a self-holding circuit without requiring external components. Once the regulator is enabled, setting active-low HOLD low forces the regulator to remain on even if ENABLE/ENABLE1 is subsequently set low. Releasing active-low HOLD shuts down the regulator.

The MAX6791–MAX6796 are available in a small, thermally enhanced TQFN package. The 5mm x 5mm package dissipates up to 2.7W, supporting continuous regulator operation during high ambient temperatures, high battery voltage, and high load-current conditions.

The MAX6791–MAX6796 are specified for a -40°C to +125°C operating temperature range.

Applications

Automotive

Part Models: 2
1ku List Price: Starting From $2.53

Documentation

Data Sheet 1

MAX6791-MAX6796: High-Voltage, Micropower, Single/Dual Linear Regulators with Supervisory Functions Data Sheet (Rev.3) 01/22/2018

Technical Articles 1

Automotive Linear Regulators Minimize Quiescent Current 02/09/2007

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX6791TPLD2+	20-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX6791TPLD2+T	20-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX6791TPLD2+	PRODUCTION	pcn_1612

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX6791

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Features and Benefits

Wide 5V to 72V Supply Voltage Range

100V Reverse-Battery Protection

Dual 5mA Regulator Outputs

Fixed or Adjustable Regulator Output

Windowed Watchdog Timer

ENABLE and HOLD Functions

Product Details

The MAX6791 evaluation kit (EV kit) provides a proven PC board layout that facilitates evaluation of the MAX6791 high-voltage, low-quiescent-current dual linear regulator. The EV kit can also evaluate the MAX6792–MAX6796. This EV kit is a fully assembled and tested surface-mount board.

This EV kit includes an on-board p-channel FET for reverse-battery protection, a button to allow testing of the regulator hold feature, and connections to both regulators, the windowed watchdog timer, and the µP reset line. Two LEDs indicate the status of both voltage regulators. Jumpers provide control over all major features of the MAX6791. The EV kit operates at temperatures ranging from -40°C to +105°C, although the MAX6791 itself can withstand temperatures up to +125°C.