Datasheet
4.9 J3 – VINLDO2
4.10 J4 – VLDO2/GND
4.11 J5 – VINLDO1
4.12 J6 – VLDO1/GND
5 4 TPS65000/1 Typical Performance Data and Characteristic Curves
5.1 Efficiency
0.00001 0.0001 0.001 0.01 0.1 1
I
O
-OutputCurrent- A
0
50
90
100
Ef
ficiency-%
70
40
20
10
V
OUT
A
=1.2V
T =25 C
o
80
60
30
2.3V
2.8V
3.3V
3.6V
4.2V
4.5V
5.5V
5V
6V
4 TPS65000/1 Typical Performance Data and Characteristic Curves
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This header is the input supply for LDO2. Placing a shorting bar between VINLDO2 and VINDC/VODC
supplies LDO2 from VIN with R2. It can be also supplied from the output of the converter VODC with R1
(not assembled).
An external power supply can be connected between J3 pin2 (VINLDO2) and pin3 (GND). Note that the
resistors R1 and R2 should be removed when supplying the LDO from an external power supply.
This header is the output of LDO2. This output voltage is externally adjustable for the TPS65000. The
default setting on the EVM is 2.8-V. VLDO2 is capable of sourcing up to 300-mA. A load can be
connected between J4 pins 1 & 2 (positive connection) and J4 pins 3 & 4 (GND).
This header is the input supply for LDO1. Placing a shorting bar between VINLDO1 and VINDC/VODC
supplies LDO1 from VIN with R11. It can be also supplied from the output of the converter VODC with
R10 (not assembled). An external power supply can be connected between J5 pin2 (VINLDO1) and pin3
(GND). Please note that the resistors R10 and R11 should be removed when supplying the LDO from an
external power supply.
This header is the output of LDO1. This output voltage is externally adjustable for the TPS65000. The
default setting on the EVM is 1.8-V. VLDO2 is capable of sourcing up to 300-mA. A load can be
connected between J6 pins 1 and 2 (positive connection) and J6 pins 3 and 4 (GND).
Figure 2 through Figure 9 present typical performance curves for the TPS65000/1. Since actual
performance data can be affected by measurement techniques and environmental variables, these curves
are presented for reference and may differ from actual field measurements.
Figure 2. TPS65000/1 Efficiency vs Load Current
Using the TPS65000EVM 2.25 MHz Step-Down Converter with Dual LDO6 SLVU293 – August 2009
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