MAX639ESA+
Active5V/3.3V/3V ADJUSTABLE, HIGH-EFFICIENCY, LOW-IQ, STEP-DOWN DC-DC CONVERTERS
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MAX639ESA+
Active5V/3.3V/3V ADJUSTABLE, HIGH-EFFICIENCY, LOW-IQ, STEP-DOWN DC-DC CONVERTERS
Technical Specifications
Parameters and characteristics for this part
| Specification | MAX639ESA+ |
|---|---|
| Current - Output | 225 mA |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 C |
| Operating Temperature [Min] | -40 ¯C |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Package / Case | 0.154 in |
| Package / Case | 8-SOIC |
| Package / Case | 3.9 mm |
| Supplier Device Package | 8-SOIC |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 11.5 V |
| Voltage - Input (Min) [Min] | 4 V |
| Voltage - Output (Max) [Max] | 11.5 V |
| Voltage - Output (Min/Fixed) | 5 V |
| Voltage - Output (Min/Fixed) [Min] | 1.3 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | N/A | 0 | $ 12.26 | |
| Tube | 1 | $ 11.01 | ||
| 10 | $ 9.95 | |||
| 25 | $ 9.48 | |||
| 100 | $ 8.23 | |||
| 300 | $ 7.86 | |||
| 500 | $ 7.17 | |||
| 1000 | $ 6.24 | |||
Description
General part information
MAX639 Series
The MAX639/MAX640/MAX653 step-down switching regulators provide high efficiency over a wide range of load currents, delivering up to 225mA. A current-limiting pulse-frequency-modulated (PFM) control scheme gives the devices the benefits of pulse-width-modulated (PWM) converters (high efficiency at heavy loads), while using only 10µA of supply current (vs. 2mA to 10mA for PWM converters). The result is high efficiency over a wide range of loads.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.Applications5V to 3.3V Conversion9V Battery to 5V, 3.3V, or 3V ConversionHigh-Efficiency Linear Regulator ReplacementPortable Instruments and Handy-Terminals
Documents
Technical documentation and resources
