Texas Instruments HPA070 manual TPS40055EVM−001 HP A070 List of Materials

SLUU186 − March 2004

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. TPS40055EVM−001 (HP A070) List of Materials

REFERENCE	QTY	DESCRIPTION						SIZE	MFR	PART NUMBER
DESIGNATOR
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,	5	Capacitor, ceramic, 0.1 µF, 25 V, X7R, 10%						805	Vishay	VJ0805Y104KXXAT
C11, C18
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	6 mΩ, I	D	30 A	LFPAK	Hitachi	HAT2168H
				DS
Q2(1)	1	MOSFET, N−channel, V	DS	30 V, R	4.2 mΩ, I 40 A			LFPAK	Hitachi	HAT2167H
				DS		D
R1	1	Resistor, chip, 1 kΩ, 1/10−W, 1%						805	Std	Std
R10	1	Resistor, chip, 0 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,	5	JACK, test point, red							Farnell	240−345
TP5, TP7, TP9
TP2, TP3,	4	JACK, test point, black							Farnell	240−333
TP6, TP10
TP8	1	Adaptor, 3.5 mm probe clip						0.2	Tektronix	131−4244−00 or
										131−5031−00
U1	1	Wide input synchronous buck controller						PWP16	TI	TPS40055PWP
−−	1	PCB, 2.85” x 2” x .062 In							Std	HPA070

TPS40055-Based Design Converts 12-V Bus to 1.8 V at 15 A (HPA070) 15