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SLUU161 – April, 2003
15
TPS40051-Based Design Converts 12-V Bus to 1.8 V at 15 A (SLUP195)
8 List of Materials
Table 1 lists the parts values of the evaluation board. These values can be modified to meet the application
requirements.
Table 1. TPS40051EVM–001 (SLUP195) List of Materials
REFERENCE
DESIGNATOR
QTY DESCRIPTION SIZE MFR PART NUMBER
C1, C4 2 Capacitor, ceramic, 470 pF, 50 V, X7R, 10% 805 Vishay VJ0805Y471KXAAT
C12, C14 2 Capacitor, ceramic, 22 µF, 16 V, X5R, 20% 1812 TDK C4532X5R1C226MT
C15 1 Capacitor, ceramic, 47 µF, 6.3 V, X5R, 20% 1812 TDK C4532X5R0J476MT
C16, C17
(1)
2 Capacitor, POSCAP, 470 µF, 4 V, 10 mΩ, 20% 7343 (D) Sanyo 4TPD470M
C2, C8, C10,
C11, C18
5 Capacitor, ceramic, 0.1 µF, 25 V, X7R, 10% 805 Vishay VJ0805Y104KXXAT
C3 1 Capacitor, ceramic, 2.2 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y222KXAAT
C5 1 Capacitor, ceramic, 5.6 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y562KXAAT
C6,C13 2 Capacitor, ceramic, 4.7 nF, 50 V, X7R, 10% 805 Vishay VJ0805Y472KXAAT
C7 1 Capacitor, ceramic, 100 pF, 50 V, NPO, 10% 805 Vishay VJ0805A101KXAAT
C9 1 Capacitor, ceramic, 1 µF, 16–V, X5R, 10% 805 TDK C2012X5R1C105KT
D1 1 Diode, switching, 10 mA, 85 V, 350 mW SOT23 Vishay–Liteon BAS16
D2 1 Diode, schottky, 3 A, 40 V SMC IR 30BQ040
J1, J2 2 Terminal block, 4-pin, 15 A, 5.1 mm 0.80 x 0.35 OST ED2227
L1
(1)
1 Inductor, SMT, 1.7–µH, 22.3 A, 1.8 mΩ 0.512 x 0.512 Coiltronics HC1–1R7
Q1
(1)
1 MOSFET, N–channel, V
DS
30 V, R
DS
6 mΩ, I
D
30 A LFPAK Hitachi HAT2168H
Q2
(1)
1 MOSFET, N–channel, V
DS
30 V, R
DS
4.2 mΩ, I
D
40 A LFPAK Hitachi HAT2167H
R1 1 Resistor, chip, 1 kΩ, 1/10–W, 1% 805 Std Std
R10 1 Resistor, chip, 3.3 Ω, 1/10–W, 5% 805 Std Std
R11 1 Resistor, chip, 0 Ω, 1/10–W, yy% 805 Std Std
R12 1 Resistor, chip, 20 Ω, 1/10–W, 5% 805 Std Std
R2 1 Resistor, chip, 165 kΩ, 1/10–W, 1% 805 Std Std
R3 1 Resistor, chip, 5.49 kΩ, 1/10–W, 1% 805 Std Std
R4 1 Resistor, chip, 243 kΩ, 1/10–W, 1% 805 Std Std
R5 1 Resistor, chip, 10 kΩ, 1/10–W, 1% 805 Std Std
R6 1 Resistor, chip, 71.5 kΩ, 1/10–W, 1% 805 Std Std
R7 1 Resistor, chip, 8.66 kΩ, 1/10–W, 1% 805 Std Std
R8 1 Resistor, chip, 226 Ω, 1/10–W, 1% 805 Std Std
R9 1 Resistor, chip, 16.2 kΩ, 1/10–W, 1% 805 Std Std
TP1, TP4,
TP5, TP7, TP9
5 JACK, test point, red Farnell 240–345
TP2, TP3,
TP6, TP10
4 JACK, test point, black Farnell 240–333
TP8 1 Adaptor, 3.5 mm probe clip 0.2 Tektronix
131–4244–00 or
131–5031–00
U1
(1)
1 Wide input synchronous buck controller PWP16 TI TPS40051PWP
–– 1 PCB, 2.85” x 2” x .062 In Std SLUP195
(1) Should not be substituted.