MAXIM MAX1806 500mA, Low-Voltage Linear Regulator Data Sheet - µMAX User Manual
Summary
This low-dropout linear regulator provides stable, high-efficiency power management up to 500mA for portable electronics. Designed for battery-powered devices such as mobile phones, PDAs, and notebook computers, it maintains reliable voltage output across a wide operating range (+2.25V to +5.5V) while ensuring minimal quiescent current draw. The manual provides detailed technical specifications, including adjustable output settings (0.8V–4.5V), thermal protection data, and guidelines for integrating this precision regulator into miniature power systems.
Page 1 Text Content
19-2018; Rev 0; 4/01
500m A, Low-Voltage Linear Regulator in µMAX
General Description Features
The MAX1806 low-dropout linear regulator operates Guaranteed 500m A Output Current from a +2.25V to +5.5V supply and delivers a guaran-
Output Down to 0.8V
teed 500m A load current with low 175m V dropout. The high-accuracy (±1%) output voltage is preset at an
Low 175m V Dropout at 500m A
internally trimmed voltage (see Selector Guide) or can
±1% Output Voltage Accuracy
be adjusted from +0.8V to +4.5V with an external resis-
tive-divider. Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V An internal PMOS pass transistor allows low 210µA Adjustable from 0.8V to 4.5V
supply current, making this device ideal for portable
Power-OK Output
equipment such as personal digital assistants (PDAs),
Low 210µA Ground Current
cellular phones, cordless phones, and other equip- ment, including base stations and docking stations.
0.02µA Shutdown Current
Other features include an active-low, power-OK output
Thermal Overload Protection
that indicates when the output is out of regulation, a
0.02µA shutdown mode, short-circuit protection, and Output Current Limit
thermal shutdown protection. The MAX1806 comes in a
Tiny 1.3W, 8-Pin Power-µMAX Package
miniature 1.3W, 8-pin power-µMAX package with a metal pad on the underside of the package.
Ordering Information
PART T EM P. R A N G E PIN-PACKAGE
Applications
MAX1806EUA_ _ -40°C to +85°C 8 Power-µMAX
Notebook Computers Cellular and Cordless Telephones
Selector Guide
PART AND SUFFIX VOUT (V) TOP MARK
Palmtop Computers
MAX1806EUA33 3.3 AAAG
Base Stations
MAX1806EUA25 2.5 AAAH
USB Hubs
MAX1806EUA18 1.8 AAAI
Docking Stations MAX1806EUA15 1.5 AAAJ
MAX1806EUA08 0.8 AAAK
Typical Operating Circuit Pin Configuration
VIN VOUT
TOP VIEW
+2.25V TO +5.5V 0.8V TO 4.5V
IN OUT NC
CIN COUT 1µF 10µF
IN OUT
RPOK OUTIN
MAX1806
MAX1806
TO POK SET
SHDN POK
GNDSHDN
GNDSET
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Page Summary Contents For MAXIM MAX1806 500mA, Low-Voltage Linear Regulator Data Sheet - µMAX User Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 10 |
| File Size | 255.33 KB |
| Published | July 15, 2026 |
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Frequently Asked Questions
What is the minimum dropout voltage for the MAX1806 regulator?
The low-dropout regulator guarantees operation down to an output voltage of 0.8V at a 500mA load current.
Is this device suitable for battery-powered equipment?
Yes, it has a P-channel MOSFET pass transistor allowing a low dropout voltage and a low 210µA quiescent supply current, making it ideal for portable devices like PDAs and cellular phones.
What are the operating temperature ranges?
The device operates from -40°C to +85°C, though storage can handle -65°C to +150°C.
How is the output voltage accuracy rated?
It provides high-accuracy (±1%) and the output voltage can be adjusted from 0.8V to 4.5V using an external resistive-divider.