MAX5091 28V, 100mA, Low-Quiescent-Current LDO with Reset and Power-Fail Input/Output

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The MAX5091 high-voltage linear regulator is designed to operate from a +5V to +28V input voltage, and withstands up to 40V transients. The device consumes only 45µA of quiescent current at 100µA output current. The MAX5091 delivers up to 100mA of output current with low 50mV maximum dropout voltage. The MAX5091 provides an active-low open-drain microprocessor RESET output. The reset timeout period is programmable and can be set with an external capacitor. The MAX5091 includes an uncommitted comparator for input voltage monitoring/power-fail indication. The device is available with a fixed +5V (MAX5091A) or +3.3V (MAX5091B) output. The MAX5091 is short-circuit protected and includes thermal shutdown.

The MAX5091 operates over the -40°C to +125°C automotive temperature range and is available in 8-pin, thermally enhanced TDFN and SO-EP packages.

Key Features

Applications/Uses

+5V to +28V Wide Operating Input Voltage Range
Withstands 40V Input Voltage Transients
Guaranteed 100mA Output Current
45µA Typical Quiescent Current at 100µA Output Current
Preset +5V (MAX5091A) or +3.3V (MAX5091B) Output Voltage
Stable with Only 10µF Output Capacitance
RESET Output with Adjustable Timeout Period
Uncommitted Comparator for Voltage Monitoring/Power-Fail Indication
Output Overload and Short-Circuit Protection
Thermal Shutdown
Available in 8-Pin TDFN (1.95W at T_A = +70°C) and 8-Pin SO (1.5W at T_A = +70°C)
Operates Over -40°C to +125°C Automotive Temperature Range

	Automotive
	Home Security/Safety
	Industrial
	Telecom/Networking

Key Specifications: Linear Regulators

Part Number

Regulators per Pkg.

Min. V_IN (V)

Max. V_IN (V)

Preset V_OUT (V)

Typ. V_DROPOUT@ Rated I_LOAD (V)

Rated I_LOAD (mA)

Max. I_CC (µA)

Low Battery/ Power Fail Output

POK/ Reset Output

POK/ Reset Output Type

Nominal POK/Reset Threshold (V)

Min. Reset Pulse Width (ms)

Watchdog

Reverse Battery Protection

Industry Qualified

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX5091

3.3
5.0

0.3

100

Yes

Reset

Open Drain Active Low

Vout-10%

Automotive - General

SOIC/8
THIN QFN (Dual)/8

-40 to +125

$0.58 @ 1k

See All Linear Regulators (137)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.