Texas Instruments TPS40090EVM-002 manual Load Transient Circuit

SLUU195 − June 2004

Reference	QTY		Description	Size	Manufacturer	Part Number
Designator
R27, R28, R29,	4	Resistor, chip, 2.2 Ω, 1/10−W, 1%		805	Std	Std
R30
R31, R32,R35,	4	Resistor, chip, 19.6 kΩ, 1/10−W, 1%		805	Std	Std
R36
R33, R34, R37,		Resistor, chip, 2.7 Ω, 1/16−W, 1%
R38, R41, R42,	8			603	Std	Std
R45, R46
R39, R40, R43,	4	Resistor, chip, 22.6 kΩ, 1/10−W, 1%		805	Std	Std
R44
R47, R49, R51,	4	Resistor, chip, 124 kΩ, 1/10−W, 1%		805	Std	Std
R52
R48, R50, R53,	4	NTC Resistor, chip, 100 kΩ, 1/10-W, 1%		805	Vishay	NTHS0603N01N1003
R54						J
R65, R66	2	Resistor, chip, 1.0 kΩ, 1/10-W, 1%		805	Std	Std
TP1	1	Test point, 0.062 Hole, Red		0.25	Keystone	5011
TP2	1	Test point, 0.062 Hole, Black		0.25	Keystone	5010
U1	1	IC, high-frequency, multiphase controller		108,800	TI	TPS40090PW
U2, U3, U4, U5	4	IC, MOSFET driver, fast synchronous buck with DTC		PWP14	TI	TPS2834PWP
U6	1	IC, Precision timer		TSSOP 8	TI	NE555PW
E1, E2	2	Test point, black, 1 mm		0.038	Farnell	240−333
LOAD TRANSIENT CIRCUIT
Q17	1	MOSFET, N-channel, 12 V, 29 A, 3.0 mΩ,		PWRPAK		Si7858DP
				S0−8
Q18	0	MOSFET, N-channel, 12 V, 29 A, 3.0 mΩ,		PWRPAK		Si7858DP
				S0−8
R18, R19, R21	3	Resistor,	chip, 0.050 Ω,, 1-W, 0.5%	2512	Vishay	WSL−2512−R050
						0.5% R86
R20, R22	0	Resistor,	chip, 0.050 Ω,, 1-W, 0.5%	2512	Vishay	WSL−2512−R050
						0.5% R86
R23, R24	2	Resistor, chip, 10 Ω, 1/16−W, 1%		603	Std	Std
R25	1	Resistor, chip, 143 kΩ, 1/10−W, 1%		805	Std	Std
R26	1	Resistor, chip, 1.43 kΩ, 1/10−W, 1%		805	Std	Std
C27, C28	2	Capacitor, ceramic, 0.1 ∝F, 25 V, X7R, ±10%		805	TDK	C2012X7R1E104K
C29	1	Capacitor, ceramic, 0.01 ∝F, 50 V, X7R, ±5%		805	muRata	GRM40UJ103J50
D5	1	Diode, dual ultra fast, series, 200 mA, 70 V		SOT23	Fairchild	BAV99
D6	1	Diode, dual schottky, 200 mA, 30 V		SOT23	Vishay−Liteon	BAT54C
J3	1	Header, 3-pin, 100 mil spacing, (36-pin strip)		0.100 x 3	Sullins	PTC36SAAN
PRE-BIAS CIRCUIT
U7	1	IC, Single GP comparator, low voltage		SOT23−5	National	LMV331M5
J11	1	Header,	2-pin, 100 mil spacing, (36-pin strip)	0.100 x 2	Sullins	PTC36SAAN
R13, R15, R17,	4	Resistor, chip, 10 kΩ, 1/16−W, 1%		603	Std	Std
R58
R57	1	Resistor, chip, 1 MΩ, 1/10−W, 1%		805	Std	Std
R14	1	Resistor, chip, 8.66 kΩ, 1/16−W, 1%		603	Std	Std

TPS40090 Multi-Phase Buck Converter and TPS2834 Drivers Steps-Down from 12-V to 1.5-V at 100 A 25