Specifications

2.2 PH
PVIN
PVIN
EN
SGND PGND
SW1 SW2
LM3269
VOUT
FB
VCON
RF PA
V
OUT
: 0.6V to 4.2V
4.7 PF
10 PF
-+
V
BATT
: 2.7V to 5.5V
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.
V
OUT
= 3 × VCON (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
V
OUT
V
BATT
MAXIMUM I
OUT
CAPABILITY
> 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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