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
