Texas Instruments TPS40090EVM-002 - Manual (Page 5)

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
V
Output voltage set point 1.477 1.508 1.540
V
Output current range VIN = 12 V 0 100 120 A
Line regulation(1)
IOUT rising from 10 A to 100 A,
10.5 V ≤ VIN ≤ 14 V
± 0.1%
Load regulation IOUT rising from 10 A to 100 A ± 0.3%
Load transient response voltage IOUT rising from 10 A to 100 A −160
mVPK
Load transient response voltage
change
IOUT falling from 100 A to 10 A 200
mVPK
Load transient response recovery IOUT rising from 10 A to 100 A < 10
s
Load transient response recovery
time
IOUT falling from 100 A to 10 A < 15
µ s
Loop bandwidth IOUT = 100 A, IOUT = 10 A 89 kHz
Phase margin IOUT = 100 A 40 °
Input ripple voltage 80 200
mVPK
Output ripple voltage 15 25
mVPK
Output rise time ms
Operating frequency 370 418 454 kHz
Full load efficiency
VIN = 12 V, VOUT = 1.5 V,
IOUT = 100 A
84.3%
Current sharing tolerance
VIN = 12 V, VOUT = 1.5 V,
IOUT = 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