MAX8581ETB+T
Active2.5MHZ/1.5MHZ STEP-DOWN CONVERTERS WITH 60MΩ BYPASS IN TDFN FOR CDMA PA POWER
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MAX8581ETB+T
Active2.5MHZ/1.5MHZ STEP-DOWN CONVERTERS WITH 60MΩ BYPASS IN TDFN FOR CDMA PA POWER
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Technical Specifications
Parameters and characteristics for this part
| Specification | MAX8581ETB+T |
|---|---|
| Frequency | 2.5 MHz, 1.5 MHz |
| Function | Downconverter |
| Mounting Type | Surface Mount |
| Package / Case | 10-WFDFN Exposed Pad |
| RF Type | Cellular, CDMA |
| Secondary Attributes | 60 MOhm |
| Supplier Device Package | 10-TDFN (3x3) |
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 | $ 6.86 | |
Description
General part information
MAX8581 Series
The MAX8581/MAX8582 high-frequency step-down converters are optimized for dynamically powering the power amplifier (PA) in CDMA handsets. They integrate a high-efficiency PWM step-down converter for medium- and low-power transmission and a 60mΩ (typ) bypass mode to power the PA directly from the battery during high-power transmission. They use an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The MAX8581/MAX8582 use an internal feedback network, and the switching frequency is internally set to 2.5MHz and 1.5MHz, respectively.Fast switching (up to 2.5MHz) and fast soft-start allowthe use of ceramic 2.2µF input and output capacitors while maintaining low voltage ripple. The small 1.5µH to 3.3µH inductor size can be optimized for efficiency.The MAX8581/MAX8582 are available in 10-pin, 3mm x3mm TDFN packages (0.8mm max height).ApplicationsWCDMA/NCDMA Cell PhonesWireless PDAs, Smartphones