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Linear Regulators (LDOs) 
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MAX1659
350mA, 16.5V Input, Low-Dropout Linear Regulators
Battery-Saving Linear Regulator Consumes Only 30µA and Delivers 350mA
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Key Features
Applications/Uses
Parametric specs for Linear Regulators
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 16.5 |
| Adj. VOUT (V) (min) | 1.25 |
| Adj. VOUT (V) (max) | 16 |
| Rated ILOAD (mA) | 350 |
| Preset VOUT (V) | 5 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.65 |
| ICC (µA) (max) | 60 |
| Output Voltage Noise (µV RMS) (typ) | 2500 |
| Ref. Bypass | No |
| Low Batt./ Pwr. Fail Out | No |
| Watchdog | No |
| Reverse Batt. Protect. | Yes |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.42 |
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Simplified Block Diagram
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Parameters
Parametric specs for Linear Regulators
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 16.5 |
| Adj. VOUT (V) (min) | 1.25 |
| Adj. VOUT (V) (max) | 16 |
| Rated ILOAD (mA) | 350 |
| Preset VOUT (V) | 5 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.65 |
| ICC (µA) (max) | 60 |
| Output Voltage Noise (µV RMS) (typ) | 2500 |
| Ref. Bypass | No |
| Low Batt./ Pwr. Fail Out | No |
| Watchdog | No |
| Reverse Batt. Protect. | Yes |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC (N)/8 |
| Budgetary Price (See Notes) | 2.42 |
Key Features
- Wide Input Voltage Range: 2.7V to 16.5V
- Low, 490mV Dropout at 350mA Output Current (MAX1659)
- 30µA Supply Current
- 1µA Max Shutdown Current
- High-Power (1.2W) 8-Pin SO Package
- Dual Mode Operation Output:
- Fixed 3.3V (MAX1658)
- Fixed 5.0V (MAX1659)
- or Adjustable (1.25V to 16V)
- Thermal Overload Protection
- Current-Limit Protection
- Reverse Battery Protection
Applications/Uses
- Cell Phones
- Digital Cordless Phones
- Electronic Planners
- Handheld Instruments (PDAs, Palmtops)
- Modems
- Palmtop Computers
- PCMCIA Cards
- PCS Phones
Description
The MAX1658/MAX1659 linear regulators maximize battery life by combining ultra-low supply currents and low dropout voltages. They feature Dual Mode operation, which presets the output to 3.3V (MAX1658) or 5V (MAX1659), or permits it to be adjusted between 1.25V and 16V. The regulator supplies up to 350mA, with a typical dropout of 650mV for the MAX1658 and 490mV for the MAX1659. With their p-channel MOSFET pass transistor, these devices maintain a low quiescent current from zero output current to the full 350mA, even in dropout. They support input voltages ranging from 2.7V to 16.5V.
The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.
The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.
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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