Texas Instruments LM3269 User Manual

1 Introduction
The LM3269 evaluation board is a working demonstration of a buck-boost DC-DC converter designed to
generate output voltages above or below a given input voltage. It is particularly suitable for cell-phone
applications powering 3G/4G Power Amplifiers.
For more details and electrical characteristics about the converter operation, please refer to the LM3269
data sheet. If you are considering using the LM3269 in a system design, please review the "PCB Layout
Considerations" section of the data sheet.
2 Operating Conditions
The device will operate under the following conditions:
• V : 2.7V ≤ V ≤ 5.5V
IN IN
• Adjustable V
OUT
• VCON: 0.2V to 1.4V
• V equation: V
OUT
• I range: 0mA to 750mA
OUT
3 Package
The LM3269 is available in a 12-bump (0.4 mm pitch) lead-free DSBGA (2.0mm X 2.5mm X 0.6mm)
package.
4 Typical Application Circuit
V
IN
10 PF
SNVU162 – FEBRUARY 2013
Submit Documentation Feedback
: 0.6V to 4.2V
= 3 x VCON
OUT
SW1
: 2.7V to 5.5V
PVIN
PVIN
LM3269
EN
SGND
GPO1
BB RFIC
DAC
Copyright © 2013, Texas Instruments Incorporated
LM3269 Evaluation Board
2.2 PH
SW2
V
OUT
VOUT
FB
4.7 PF
V
OUT
VCON
PGND
User's Guide
SNVU162 – FEBRUARY 2013
: 0.6V to 4.2V
RF
PA
= 3 x VCON
LM3269 Evaluation Board
1