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Linear Regulators (LDOs) 
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MAX1806
500mA, Low-Voltage Linear Regulator in µMAX
Low Input and Output Voltage Linear Regulator Delivers Up to 500mA in a Tiny Power µMAX Package
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Linear Regulators
| VIN (V) (min) | 2.25 |
| VIN (V) (max) | 5.5 |
| Adj. VOUT (V) (min) | 0.8 |
| Adj. VOUT (V) (max) | 4.5 |
| Rated ILOAD (mA) | 500 |
| Preset VOUT (V) | 0.8 1.5 1.8 2.5 3.3 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.17 |
| ICC (µA) (max) | 400 |
| Output Voltage Noise (µV RMS) (typ) | 300 |
| Ref. Bypass | No |
| Low Batt./ Pwr. Fail Out | No |
| POK/Reset Thresh. (V) (nom) | Vout-7% |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | UMAX/8 |
| Budgetary Price (See Notes) | 1.68 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | 500mA, Low-Voltage Linear Regulator in µMAX | Sep 07, 2021 | |
| App Note | Choosing the Right DC-DC Converter for Automotive Applications | ||
| Tutorial | Regulator Topologies for Battery-Powered Systems |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Linear Regulators
| VIN (V) (min) | 2.25 |
| VIN (V) (max) | 5.5 |
| Adj. VOUT (V) (min) | 0.8 |
| Adj. VOUT (V) (max) | 4.5 |
| Rated ILOAD (mA) | 500 |
| Preset VOUT (V) | 0.8 1.5 1.8 2.5 3.3 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.17 |
| ICC (µA) (max) | 400 |
| Output Voltage Noise (µV RMS) (typ) | 300 |
| Ref. Bypass | No |
| Low Batt./ Pwr. Fail Out | No |
| POK/Reset Thresh. (V) (nom) | Vout-7% |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | UMAX/8 |
| Budgetary Price (See Notes) | 1.68 |
Key Features
- Guaranteed 500mA Output Current
- Output Down to 0.8V
- Low 175mV Dropout at 500mA
- ±1% Output Voltage Accuracy
- Preset at 0.8V, 1.5V, 1.8V, 2.5V, or 3.3V
- Adjustable from 0.8V to 4.5V
- Power-OK Output
- Low 210µA Ground Current
- 0.02µA Shutdown Current
- Thermal Overload Protection
- Output Current Limit
- Tiny 1.3W, 8-Pin Power-µMAX Package
- -40°C to +85°C Temperature Range
Applications/Uses
- Cell Phones/Cordless Phones
- Docking Stations
- Notebook Computers
- Palmtop Computers
- PDAs
- USB Hubs
- Wireless Base Stations
Description
The MAX1806 low-dropout linear regulator operates from a +2.25V to +5.5V supply and delivers a guaranteed 500mA load current with low 175mV dropout. The high-accuracy (±1%) output voltage is preset at an internally trimmed voltage (see Selector Guide) or can be adjusted from +0.8V to +4.5V with an external resistive-divider.
An internal PMOS pass transistor allows low 210µA supply current, making this device ideal for portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, and other equipment, including base stations and docking stations.
Other features include an active-low, power-OK output that indicates when the output is out of regulation, a 0.02µA shutdown mode, short-circuit protection, and thermal shutdown protection. The MAX1806 comes in a miniature 1.3W, 8-pin power-µMAX® package with a metal pad on the underside of the package.
An internal PMOS pass transistor allows low 210µA supply current, making this device ideal for portable equipment such as personal digital assistants (PDAs), cellular phones, cordless phones, and other equipment, including base stations and docking stations.
Other features include an active-low, power-OK output that indicates when the output is out of regulation, a 0.02µA shutdown mode, short-circuit protection, and thermal shutdown protection. The MAX1806 comes in a miniature 1.3W, 8-pin power-µMAX® package with a metal pad on the underside of the package.
Technical Docs
| Data Sheet | 500mA, Low-Voltage Linear Regulator in µMAX | Sep 07, 2021 | |
| App Note | Choosing the Right DC-DC Converter for Automotive Applications | ||
| Tutorial | Regulator Topologies for Battery-Powered Systems |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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