LM3263TMX/NOPB

LM3263高电流降压型DC - DC转换器， MIPI® RF前端控制接口的射频功率放大器 LM3263 High-Current Step-Down DC-DC Converter with MIPI® RF Front-End Control Interface for RF Power Amplifiers

The LM3263 is a DC-DC converter optimized for powering multi-mode multi-band RF power amplifiers PAs from a single lithium-ion cell. The LM3263 steps down an input voltage from 2.7 V to 5.5 V to a dynamically adjustable output voltage of 0.4 V to 3.6 V. The output voltage is externally programmed through the RFFE Digital Control Interface and is set to ensure efficient operation at all power levels of the RF PA.

When operating in pulse width modulated PWM mode, the LM3263 produces a small and predictable amount of output voltage ripple thus meeting the power and stringent spectral-compliance needs of RF PAs with minimal filtering and minimal excess headroom. When operating in PFM mode, the LM3263 enables the lowest current consumption across PA output power level settings and therefore maximizes system efficiency.

The LM3263 has a unique ctive urrent assist and analog ypass ACB feature to minimize inductor size without any loss of output regulation for the entire battery voltage and RF output power range, until dropout. ACB provides a parallel current path, when needed, to limit the maximum inductor current to 1.45 A typical while still driving a 2.5-A load. The ACB feature also enables operation with minimal dropout voltage.