TPS75003
SBVS052I –OCTOBER 2004–REVISED AUGUST 2010
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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 3A for both CORE and I/O rails. A low dropout linear regulator powers auxiliary rails up to 300mA.
All channels have independent enable and soft-start, allowing control of inrush current and output voltage ramp
time as required by the application.
Figure 1 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 up to 3A load currents. Inductors in Table 1 are
tested up to the respective saturation 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 10mH ±20% 53mΩ ±20% 1.4A
SLF6025−150MR88 TDK 15mH ±20% 85mΩ ±20% 0.88A
CDRH6D28−5R0 Sumida 5mH 23mΩ 2.4A
CDRH6D38-5R0 Sumida 5mH 18mΩ 2.9A
CDRH103R−100 Sumida 10mH 45mΩ 2.4A
CDRH4D28−100 Sumida 10mH 96mΩ 1.0A
CDRH8D43-150 Sumida 15mH 42mΩ 2.9A
CDRH5D18−6R2 Sumida 6.2mH 71mΩ 1.4A
DO3316P−472 Coilcraft 4.7mH 18mΩ 5.4A
DT3316P−153 Coilcraft 15mH 60mΩ 1.8A
DT3316P−223 Coilcraft 22mH 84mΩ 1.5A
744052006 Wurth 6.2mH 80mΩ 1.45A
74451115 Wurth 15mH 90mΩ 0.8A
Table 2. PMOS Transistors Tested with the TPS75003
PART NUMBER MANUFACTURER R
DS,ON
(TYP) V
DS
I
D
PACKAGE
Si5447DC Vishay Siliconix 0.11Ω at VGS = –2.5V –20V –3.5A at +25°C 1206
Si5475DC Vishay Siliconix 0.041Ω at VGS = –2.5V –12V –6.6A at +25°C 1206
Si2323DS Vishay Siliconix 0.052Ω at VGS = –2.5V –20V –4.1A at +25°C SOT23
Si2301ADS Vishay Siliconix 0.19Ω at VGS = –2.5V –20V –1.4A at +25°C SOT23
Si2323DS Vishay Siliconix 0.41Ω at VGS = –2.5V –20V –4.1A at +25°C SOT23
FDG326P Fairchild 0.17Ω at VGS = –2.5V –20V –1.5A SC70
Table 3. Diodes Tested with the TPS75003
PART NUMBER MANUFACTURER V
R
I
F
PACKAGE
MBRM120LT3 ON Semiconductor 20V 1.0A DO216AA
MBR0530T1 ON Semiconductor 30V 1.5A SOD123
ZHCS2000TA Zetex 40V 2.0A SOT23−6
B320 Diodes Inc. 20V 3.0A SMA
SS32 Fairchild 20V 3.0A DO214AB
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