Datasheet

TPS75003-EP
SGLS311A –DECEMBER 2006– REVISED MARCH 2011 www.ti.com
APPLICATION INFORMATION
The TPS75003 is an integrated power management IC designed specifically to power DSPs and FPGAs such as
the Xilinx Spartan-3, Spartan-3E and Spartan-3L. Two non-synchronous buck controllers can be configured to
supply up to 3 A for both CORE and I/O rails. A low dropout linear regulator powers auxiliary rails up to 300 mA.
All channels have independent enable and soft-start, allowing control of inrush current and output voltage ramp
time as required by the application.
Figure 2 shows a typical application circuit for powering the Xilinx Spartan-3 FPGA. Table 1 through Table 4
show component values that have been tested for use with 2-A and 3-A load currents. Other similar external
components can be substituted as desired; however, in all cases the circuits that are used should be tested for
compliance to application requirements.
Table 1. Inductors Tested with the TPS75003
PART NUMBER MANUFACTURER INDUCTANCE DC RESISTANCE SATURATION CURRENT
SLF7032T−100M1R4 TDK 10 μH ±20% 53 mΩ ±20% 1.4 A
SLF6025−150MR88 TDK 15 μH ±20% 85 mΩ ±20% 0.88 A
CDRH6D28−5R0 Sumida 5 μH 23 mΩ 2.4 A
CDRH6D38-5R0 Sumida 5 μH 18 mΩ 2.9 A
CDRH103R−100 Sumida 10 μH 45 mΩ 2.4 A
CDRH4D28−100 Sumida 10 μH 96 mΩ 1 A
CDRH8D43-150 Sumida 15 μH 42 mΩ 2.9 A
CDRH5D18−6R2 Sumida 6.2 μH 71 mΩ 1.4 A
DO3316P−472 Coilcraft 4.7 μH 18 mΩ 5.4 A
DT3316P−153 Coilcraft 15 μH 60 mΩ 1.8 A
DT3316P−223 Coilcraft 22 μH 84 mΩ 1.5 A
744052006 Wurth 6.2 μH 80 mΩ 1.45 A
74451115 Wurth 15 μH 90 mΩ 0.8 A
Table 2. PMOS Transistors Tested with the TPS75003
PART NUMBER MANUFACTURER R
DS,ON
(TYP) V
DS
I
D
PACKAGE
Si5447DC Vishay Siliconix 0.11 Ω at VGS = −2.5 V −20 V −3.5 A at +25°C 1206
Si5475DC Vishay Siliconix 0.041 Ω at VGS = −2.5 V −12 V −6.6 A at +25°C 1206
Si2323DS Vishay Siliconix 0.052 Ω at VGS = −2.5 V −20 V −4.1 A at +25°C SOT23
Si2301ADS Vishay Siliconix 0.19 Ω at VGS = −2.5 V −20 V −1.4 A at +25°C SOT23
Si2323DS Vishay Siliconix 0.41 Ω at VGS = −2.5 V −20 V −4.1 A at +25°C SOT23
FDG326P Fairchild 0.17 Ω at VGS = −2.5 V −20 V −1.5 A SC70
Table 3. Diodes Tested with the TPS75003
PART NUMBER MANUFACTURER V
R
I
F
PACKAGE
MBRM120LT3 ON Semiconductor 20 V 1 A DO216AA
MBR0530T1 ON Semiconductor 30 V 1.5 A SOD123
ZHCS2000TA Zetex 40 V 2 A SOT23−6
B320 Diodes Inc. 20 V 3 A SMA
SS32 Fairchild 20 V 3 A DO214AB
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