SLUU195 − June 2004
5
TPS40090 Multi-Phase Buck Converter and TPS2834 Drivers Steps-Down from 12-V to 1.5-V at 100 A
2 Features
Table 1. TPS40090EVM−002 Performance Summary
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
Input voltage range 10.5 12.0 14.0
Output voltage set point 1.477 1.508 1.540
V
Output current range V
IN
= 12 V 0 100 120 A
Line regulation
(1)
I
OUT
rising from 10 A to 100 A,
10.5 V ≤ V
IN
≤ 14 V
±0.1%
Load regulation I
OUT
rising from 10 A to 100 A ±0.3%
Load transient response voltage
I
OUT
rising from 10 A to 100 A −160
Load transient response voltage
change
I
OUT
falling from 100 A to 10 A 200
mV
PK
Load transient response recovery
I
OUT
rising from 10 A to 100 A < 10
Load transient response recovery
time
I
OUT
falling from 100 A to 10 A < 15
µs
Loop bandwidth I
OUT
= 100 A, I
OUT
= 10 A 89 kHz
Phase margin I
OUT
= 100 A 40 °
Input ripple voltage 80 200
Output ripple voltage 15 25
mV
PK
Output rise time ms
Operating frequency 370 418 454 kHz
Full load efficiency
V
IN
= 12 V, V
OUT
= 1.5 V,
I
OUT
= 100 A
84.3%
Current sharing tolerance
V
IN
= 12 V, V
OUT
= 1.5 V,
I
OUT
= 100 A
±5% ±10%
3 Schematic
+
12V
+
Phase Programming
R65 R66
4−phase open open
3−phase open 1k
2−phase 1k 1k
Figure 1. TPS40090EVM−002 Schematic Part 1 − TPS40090 Controller and Pre-Bias Circuit
