Design Strategy
1-3
Introduction
1.2
Design Strategy
The TI SLVP152 EVM provides a convenient method for evaluating the
performance of TPS701xx dual-output linear regulators. The EVM provides
proven, demonstrated reference designs and test modes to aid in evaluation.
The board contains a power supply along with an onboard transient generator.
The transient slew rate can be modified by changing two resistors. Jumpers
allow settings of minimum/maximum load as well as device-enabling and
power sequencing. There is enough room on the EVM to evaluate different
types of output capacitors including ESR behaviors. Many test points allow the
measuring of input, output, and dropout voltage.
The EVM contains a TPS70151. Regulator 1 provides an output voltage of
3.3 V and a maximum output current of 500 mA. Regulator 2 provides an
output voltage of 1.8 V and a maximum output current of 250 mA.
Table 1–1 summarizes the TPS701xx family’s features. See the TPS701xx
datasheet, TI literature number SLVS222
, for a further explanation of features.
Table 1–1. Summary of the TPS701xx LDO Family Features
DESCRIPTION
TPS701xx FEATURE
Maximum input voltage [V]
6
Maximum output current [mA]
500/250
Typical quiescent current [
µ
A]
190
Typical dropout voltage [mV]
150/200
Typical output noise [
µ
Vrms]
(30 Hz
≤
f
≤
50 kHz, C
O
= 33
µ
F)
65
Accuracy over line, load, and
temperature
2%
PSRR (at 1 kHz, C
O
= 10
µ
F,
T
J
= 25
°
C)
80/60 dB
Package
PWP
Minimum output capacitor
> 10
µ
F (ceramic)
Available voltage option [V]
3.3/1.5, 3.3/1.2, 3.3/1.8, 3.3/2.5, and adj/adj
Performance advantage
Dual output LDO, power-up sequencing, DSP application,
PG and RESET
Summary of Contents for TPS70151 Series
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