Product Details
Key Features
Applications/Uses
VIN (V) (min) | 4 |
VIN (V) (max) | 11.5 |
VOUT1 (V) (min) | 1.3 |
VOUT1 (V) (max) | 11.5 |
IOUT1 (A) (max) | 0.225 |
Switch Type | Internal |
Preset VOUT (V) | 3 5 |
Output Adjust. Method | Preset Resistor |
Power Good Signal | Yes |
# DC-DC Outputs | 1 |
Package/Pins | PDIP/8 SOIC (N)/8 |
Budgetary Price (See Notes) | 3.76 |
Simplified Block Diagram
Technical Docs
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Parameters
VIN (V) (min) | 4 |
VIN (V) (max) | 11.5 |
VOUT1 (V) (min) | 1.3 |
VOUT1 (V) (max) | 11.5 |
IOUT1 (A) (max) | 0.225 |
Switch Type | Internal |
Preset VOUT (V) | 3 5 |
Output Adjust. Method | Preset Resistor |
Power Good Signal | Yes |
# DC-DC Outputs | 1 |
Package/Pins | PDIP/8 SOIC (N)/8 |
Budgetary Price (See Notes) | 3.76 |
Key Features
- High Efficiency for a Wide Range of Load Currents
- 10µA Quiescent Current
- Output Currents Up to 225mA
- Preset or Adjustable Output Voltage:
- 5.0V (MAX639)
- 3.3V (MAX640)
- 3.0V (MAX653)
- Low-Battery Detection Comparator
- Current-Limiting PFM Control Scheme
Applications/Uses
- 5V to 3.3V Conversion
- 9V Battery to 5V, 3.3V, or 3V Conversion
- High-Efficiency Linear Regulator Replacement
- Portable Instruments and Handy-Terminals
Description
The MAX639/MAX640/MAX653 input range is 4V to 11.5V, and the devices provide lower preset output voltages of 5V, 3.3V, and 3V, respectively. Or, the output can be user-adjusted to any voltage from 1.3V to the input voltage.
The MAX639/MAX640/MAX653 have an internal 1A power MOSFET switch, making them ideal for minimum-component, low- and medium-power applications. For increased output drive capability, use the MAX649/MAX651/MAX652 step-down controllers, which drive an external P-channel FET to deliver up to 5W.
Technical Docs
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 .