Texas Instruments TPS780xxEVM-301, Руководство пользователя, Страница: 1 / 12

1 Introduction
User's Guide
SLVU235 – March 2008
TPS780xxEVM-301
This user’s guide describes the characteristics, operation, and use of the TPS780xxEVM-301 evaluation
module (EVM). This EVM demonstrates the Texas Instruments TPS780330220 ultra low-power, low
dropout (LDO) regulator with pin-selectable, dual-output voltage levels. The TPS780330220 supplies up to
150 mA of output current at a pin programmable output voltage of 3.3 V (V
SET
= low) or 2.2 V (V
SET
=high)
from a 2.2 V to 5.5 V input source. See the TPS780330220 data sheet ( SBVS083 ) for definitive device
specifications. This EVM user’s guide includes setup instructions, schematic diagram, bill of materials
(BOM), and PCB layout drawings.
Contents
1 Introduction
...................................................................................................................
1
2 Setup
..........................................................................................................................
2
3 Operation
.....................................................................................................................
2
4 Test Results
..................................................................................................................
3
5 Board Layout, Schematic, and Bill of Materials
..........................................................................
5
5.1 Board Layout
........................................................................................................
5
5.2 Schematic
............................................................................................................
8
5.3 Bill of Materials
......................................................................................................
9
List of Figures
1 Startup from Enable
.........................................................................................................
3
2 Load Transient, V
I
= 3.6 V, VOUT = 2.5 V, IOUT = 100 mA to 150 mA returning to 100 mA
.....................
3
3 Low to High Output Transient (VOUT = 2.2 V to 3.3 V, R
LOAD
= 22
Ω
)
...............................................
4
4 High to Low Output Transient (VOUT = 3.3 V to 2.2 V, R
LOAD
= 22
Ω
)
................................................
4
5 Top Assembly Layer
.........................................................................................................
5
6 Top Layer
.....................................................................................................................
6
7 Bottom Layer
.................................................................................................................
7
8 TPS780xxEVM-301 Schematic
............................................................................................
8
List of Tables
1 TPS780xxEVM-301 Jumpers and Connections
.........................................................................
2
2 TPS780xxEVM-301 Bill of Materials
......................................................................................
9
The TPS780xxEVM-301 evaluation module (EVM) assists designers in evaluating the operation and
performance of the TPS780330220 low dropout regulator (LDO). This LDO provides up to 150 mA of
output current at a pin-programmable output while maintaining ultra-low quiescent current (I
Q
=500 nA).
The board features the small 2 mm
×
2 mm six-lead SON package (DRV) and the TSOT23-5 (DDC)
package for small solution size.
Related Documentation from Texas Instruments
TPS780xx, Ultra Low-Power, 150mA Low Dropout Regulator, IQ 500nA with Pin-Selectable, Dual Output
Voltage Levels
, data sheet ( SBVS083 )
SLVU235 – March 2008 TPS780xxEVM-301 1
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