2.2 2H

PVIN

PVIN

EN

SGND

PGND

SW1

SW2

LM3269

VOUT

FB

VCON

RF PA

4.7 2F

10 2F

GPO1

DAC

BB

RFIC

LM3269

www.ti.com

SNVS793D – NOVEMBER 2011 – REVISED MAY 2015

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

8.1.1 Setting The Output Voltage

The LM3269 features a pin-controlled variable output voltage which eliminates the need for external feedback

resistors. It can be programmed for an output voltage from 0.6 V to 4.2 V by setting the voltage on the VCON

pin, as in Equation 1.

(1)

When VCON is between 0.2 V and 1.4 V, the output voltage will follow the formula in Equation 1.

8.1.2 Output Current Capacity

The LM3269 load capability is as shown in Table 1.

Table 1. Output Voltage vs. Maximum Output Current Derating

> 3 V

650 mA

4.2 V

2.7 V to 3 V

500 mA

> 3 V

750 mA

3.8 V

2.7 V to 3 V

600 mA

< 1.5 V

2.7 V to 5.5 V

120 mA (in PFM mode)

8.2 Typical Application

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