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低功耗产品的电源管理芯片的选项

Other Parts Discussed in Thread: CC2541, TPS62742, LMR62014, TPS63060, TPS63061

4节1.5v电池串联满电7.2v@3000mA作为设备电源,4节1.5v电池串联在4.8v时定义为缺电;

LMR62014DCDC 输出5v驱动步进电机;

步进电机的工作电源范围是3.6v-24v;

TPS62742DCDC输出3.0v为stm32l073r、cc2541、spi_flash和NXP_NFC供电;

设备工作模式有:睡眠、唤醒、工作这3种模式

请问:

作为低功耗产品,选用这2个LMR62014、TPS62742是否合适?

是否有更优秀的芯片组合?

感谢!