See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

YZR | 16

Temp:

S (-30 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

LM3212TL/NOPB


Step-Down DC-DC Converter with Analog Bypass Mode for RF Power Amplifiers

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Texas Instruments LM3212TL/NOPB

The LM3212 is a DC-DC converter optimized for powering GSM RF power amplifiers (PAs) from a single Lithium-Ion cell; however, it may also be used in other applications. The LM3212 steps down an input voltage from 2.7V to 5.5V to a dynamically adjustable output voltage of 0.5V to 3.4V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA.

The LM3212 has a unique Active Current Bypass (ACB) feature that speeds up output voltage transition times, provides extra drive and a low-resistance analog bypass. The LM3212 has an AUTO_BY pin to force the LM3212 into bypass mode during low input-voltage operation thus overriding the automatic analog bypass feature. Forced bypass can also be achieved by setting VCON > VIN/2.5.

In addition the LM3212 offers a fixed-frequency PWM mode to minimize RF interference and a shutdown mode to turn the device off and reduce battery consumption to 0.02 µA (typ.)

The LM3212 is available in a 16-bump lead-free DSBGA package. A 1.6 MHz switching frequency allows use of tiny surface-mount components for the required inductor and two ceramic capacitors.

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