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SNVSA11A – AUGUST 2013 – REVISED JUNE 2014 LM3290 Product Brief
1 Features 2 Description The LM3290, with its companion IC LM3291, is an
RF envelope supply modulator (EM) with integrated
DC-DC boost converter optimized for Envelope
Tracking (ET) RF power amplifiers (PAs). The device
enables maximum transmit output power independent
of the input battery voltage (battery as low as 2.5 V)
and is controlled by the MIPIВ® RFFE 1.1. 1 VOUT_RANGE
– VOUT_ET = 0.6 V to 4.5 V
– VOUT_APT = 0.4 V to 3.81 V (or VIN – 200 mV)
DC Boost For ET Operation:
– Boost Input Voltage Range: 2.5 V to 5 V
– High-Efficiency (90% typical) with Internal
Synchronous Rectification
– Boost Bypass Function with Low Resistance
(150 mО© typ.)
– 2.7-MHz PWM Switching Frequency …
