Datasheet

SLUU182 − March 2004
5
High-Performance Dual Synchronous Buck Conversion Using the TPS5124
2 Features
This EVM is designed to operate from 12-V bus voltage. It generates two outputs, 3.3 V at 15 A
and 1.5 V at 10 A.
Table 1. TPS5124EVM−001 Performance Summary
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input voltage range 6.5 12.0 15.0 V
Operating frequency 300 kHz
Input ripple voltage (RMS) V
IN
= 12 V, I
OUT1
= 15 A, I
OUT2
= 10 A 92 mV
Channel 1
Output current range 6.5 V ≤ V
IN
≤ 15 V 0 15 16 A
Line regulation 6.5 V ≤ V
IN
≤ 15 V I
OUT
= 15 A ±0.1%
Load regulation 1 A ≤ I
OUT
≤ 15 A V
IN
= 12 V ±0.3%
Load transient response voltage
I
OUT
rising from 0 A to 8.5 A −160
mV
PK
Load transient response voltage
change
I
OUT
falling from 8.5 A to 0 A 200
mV
PK
Load transient response recovery
I
OUT
rising from 0 A to 8.5 A 80
s
Load transient response recovery
time
I
OUT
falling from 8.5 A to 0 A 120
µs
Loop bandwidth I
OUT
= 15 A 30 kHz
Phase margin I
OUT
= 15 A 55 °
Output ripple voltage I
OUT
= 15 A 33 66 mV
PP
Output rise time V
IN
= 12 V, V
OUT
= 3.3 V, I
OUT
= 15 A 2.85 ms
Full load efficiency V
IN
= 12 V, V
OUT
= 3.3 V, I
OUT
= 15 A 90.6%
Channel 2
Output current range 6.5 V ≤ V
IN
≤ 15 V 0 10 12 A
Line regulation 6.5 V ≤ V
IN
≤ 15 V ±0.1%
Load regulation 1 A ≤ I
OUT
≤ 10 A V
IN
= 12 V ±0.3%
Load transient response voltage
I
OUT
rising from 0 A to 7.5 A −120
mV
PK
Load transient response voltage
change
I
OUT
falling from 7.5 A to 0 A 220
mV
PK
Load transient response recovery
I
OUT
rising from 0 A to 7.5 A 40
s
Load transient response recovery
time
I
OUT
falling from 7.5 A to 0 A 80
µs
Loop bandwidth I
OUT
= 10 A 23 kHz
Phase margin I
OUT
= 10 A 55 °
Output ripple voltage I
OUT
= 10 A 15 30 mV
PP
Output rise time V
IN
= 12 V, V
OUT
= 1.5 V, I
OUT
= 10 A 2.12 ms
Full load efficiency V
IN
= 12 V, V
OUT
= 1.53 V, I
OUT
= 10 A 85.5%
3 Schematic
The schematic of TPS5124EVM is shown in Figure 1.