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Technical Specifications
Parameters and characteristics for this part
| Specification | LM3248EVM |
|---|---|
| Contents | Board(s) |
| Current - Output | 2.5 A |
| Frequency - Switching | 2.7 MHz |
| Main Purpose | DC/DC, Step Up or Down |
| Outputs and Type | 1 Non-Isolated Output |
| Regulator Topology | Buck, Boost |
| Utilized IC / Part | LM3248 |
| Voltage - Input [Max] | 5.5 V |
| Voltage - Input [Min] | 2.7 V |
| Voltage - Output [Max] | 4 V |
| Voltage - Output [Min] | 0.4 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
Description
General part information
LM3248 Series
The LM3248 is a PWM/PFM Boost-Buck DC/DC converter that provides efficient utilization of battery power over a wide voltage range. The device architecture is suitable for advanced RF front-end systems that demand dynamic voltage and current to support converged power amplifier architectures operating in 2G/3G/4G and 3GPP/LTE modes. For example, the LM3248 is designed to produce higher output voltages while maintaining PFM mode as required by some new reduced-power CMOS PAs. The extremely fast Boost-Buck function reduces RF PA overhead power dissipation, extending battery talk time. The device will operate at input voltage VIN range of 2.7V to 5.5V and an adjustable output voltage VOUT range of 0.4V to 4.0V at a maximum current load of 2.5A.
The LM3248 is available in a 30-bump, lead-free thin DSBGA package.
The LM3248 utilizes step-up (Boost) and variable output step-down (Buck) DC/DC converters. Combining a cascaded Boost and Buck converter in a single package is ideal for powering the latest multimode/multi-standard RF power amplifiers. The Boost converter provides the RF power subsystem the capability to operate at lower battery voltages as well as to maintain increased PA linearity and transmit power margins over a wider battery voltage supply range.
Documents
Technical documentation and resources
