MAX8640YEXT25+T
ActiveTINY 500MA, 4MHZ/2MHZ SYNCHRONOUS STEP-DOWN DC-DC CONVERTERS
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MAX8640YEXT25+T
ActiveTINY 500MA, 4MHZ/2MHZ SYNCHRONOUS STEP-DOWN DC-DC CONVERTERS
Technical Specifications
Parameters and characteristics for this part
| Specification | MAX8640YEXT25+T |
|---|---|
| Current - Output | 500 mA |
| Frequency - Switching | 1.7 MHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 C |
| Operating Temperature [Min] | -40 ¯C |
| Output Configuration | Positive |
| Package / Case | SOT-363, SC-88, 6-TSSOP |
| Supplier Device Package | SC-70-6 |
| Synchronous Rectifier | True |
| Topology | Buck |
| Voltage - Input (Max) [Max] | 5.5 V |
| Voltage - Input (Min) [Min] | 2.7 V |
| Voltage - Output (Min/Fixed) | 2.5 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 | $ 3.53 | |
Description
General part information
MAX8640Y Series
The MAX8640Y/MAX8640Z step-down converters are optimized for applications where small size, high efficiency, and low output ripple are priorities. They utilize a proprietary PWM control scheme that optimizes the switching frequency for high efficiency with small external components and maintains low output ripple voltage at all loads. The MAX8640Z switches at up to 4MHz to allow a tiny 1µH inductor and 2.2µF output capacitor. The MAX8640Y switches at up to 2MHz for higher efficiency while still allowing small 2.2µH and 4.7µF components. Output current is guaranteed up to 500mA, while typical quiescent current is 28µA. Factory-preset output voltages from 0.8V to 2.5V eliminate external feedback components.Internal synchronous rectification greatly improves efficiency and replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduce input capacitor requirements.The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.ApplicationsCell Phones, PDAs, DSCs, MP3sI/O PowerMicroprocessor/DSP Core PowerOther Handhelds Where Space Is Limited