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Linear Regulators (LDOs) 
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MAX8840
Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN
Ultra-Low-Noise, Low-Dropout, 150mA Linear Regulator Requires Only 3.9mm2 Total Solution Size without Compromising Performance
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Key Features
Applications/Uses
Parametric specs for Linear Regulators
| VIN (V) (min) | 2 |
| VIN (V) (max) | 6 |
| Rated ILOAD (mA) | 150 |
| Preset VOUT (V) | 3 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.17 |
| ICC (µA) (max) | 90 |
| Output Voltage Noise (µV RMS) (typ) | 11 |
| Ref. Bypass | Yes |
| Low Batt./ Pwr. Fail Out | No |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | UDFN/6 |
| Budgetary Price (See Notes) | 0.6 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN | Feb 02, 2007 |
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Parameters
Parametric specs for Linear Regulators
| VIN (V) (min) | 2 |
| VIN (V) (max) | 6 |
| Rated ILOAD (mA) | 150 |
| Preset VOUT (V) | 3 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.17 |
| ICC (µA) (max) | 90 |
| Output Voltage Noise (µV RMS) (typ) | 11 |
| Ref. Bypass | Yes |
| Low Batt./ Pwr. Fail Out | No |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | UDFN/6 |
| Budgetary Price (See Notes) | 0.6 |
Key Features
- Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN
- 11µVRMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8840)
- 78dB PSRR at 1kHz (MAX8840)
- 120mV Dropout at 120mA Load
- Stable with 1µF Ceramic Capacitor for Any Load
- Guaranteed 150mA Output
- Only Need Input and Output Capacitors (MAX8841)
- Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and Adjustable (MAX8842)
- Low 40µA Ground Current
- Excellent Load/Line Transient
- Overcurrent and Thermal Protection
Applications/Uses
- Base Stations
- Bluetooth® Portable Radios and Accessories
- Cellular and Cordless Phones
- Digital Cameras
- PDA and Palmtop Computers
- Personal Stereos
- Portable and Battery-Powered Equipment
- Wireless LANs
Description
The MAX8840/MAX8841/MAX8842 ultra-low-noise, low-dropout (LDO) linear regulators are designed to deliver up to 150mA continuous output current. These regulators achieve a low 120mV dropout for 120mA load current. The MAX8840 uses an advanced architecture to achieve ultra-low output voltage noise of 11µVRMS and PSRR of 54dB at 100kHz.
The MAX8841 does not require a bypass capacitor, hence achieving the smallest PC board area. The MAX8842 output voltage can be adjusted with an external divider.
The MAX8840/MAX8841 are preset to a variety of voltages in the 1.5V to 4.5V range. Designed with a p-channel MOSFET series pass transistor, the MAX8840/MAX8841/MAX8842 maintain very low ground current (40µA).
The regulators are designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8840 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA.
The MAX8840/MAX8841/MAX8842 are available in a tiny 1mm x 1.5mm x 0.8mm µDFN.
The MAX8841 does not require a bypass capacitor, hence achieving the smallest PC board area. The MAX8842 output voltage can be adjusted with an external divider.
The MAX8840/MAX8841 are preset to a variety of voltages in the 1.5V to 4.5V range. Designed with a p-channel MOSFET series pass transistor, the MAX8840/MAX8841/MAX8842 maintain very low ground current (40µA).
The regulators are designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8840 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA.
The MAX8840/MAX8841/MAX8842 are available in a tiny 1mm x 1.5mm x 0.8mm µDFN.
Technical Docs
| Data Sheet | Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN | Feb 02, 2007 |
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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