Texas Instruments TPS54810 warranty Performance Graphs from Application Circuit Shown in Figure

TPS54810 www.ti.com

SLVS420B − MARCH 2002 − R EVISED FEBRUARY 2005

PERFORMANCE GRAPHS (FROM APPLICATION CIRCUIT SHOWN IN FIGURE 9)

				EFFICIENCY
					vs
			OUTPUT CURRENT
	100					VI = 5 V			1.003
	95
						VO = 1.8 V
	90					fs = 700 kHz			1.002
	85							Load Regulation	1.001
Efficiency − %	80
	75								1
	70
	65								0.999
	60
	55								0.998
	50	0	2	4	6	8	10		0.997
			IO − Output Current − A

Figure 12

	LOAD REGULATION							LINE REGULATION
		vs								vs
	OUTPUT CURRENT							INPUT VOLTAGE
						1.001					VI = 5 V
				VI = 5 V		1.0008
				VO = 1.8 V				8 A			VO = 1.8 V
				T = 25°C		1.0006					TA = 25°C
				A							fs = 700 kHz
				fs = 700 kHz	Regulation	1.0004
						1.0002
						1
					Line	0.9998	4 A		0 A
						0.9996
						0.9994
						0.9992
0	2	4	6	8	10	0.999
						4.5	4.7	4.9	5.1	5.3	5.5	5.7	5.9
	IO − Output Current − A							VI − Input Voltage − V
		Figure 13						Figure 14

		AMBIENT TEMPERATURE
					vs
			OUTPUT CURRENT (1)
	125
	115					TJ = 25°C			10−VoltageRipplemV/div
C						fs = 700 kHz
TemperatureAmbient− °	105
	95						VI = 5 V
	85
	75
	65
	55								Output
T
−	45
A
	35
	25
	0	1	2	3	4	5	6	7	8
			IO − Output Current − A

Figure 15

OUTPUT RIPPLE VOLTAGE

VI = 5 V

VO = 1.8 V IO = 6 A

fs = 700 kHz

t − Time − 1 ∝s/div

Figure 16

VO− Output Voltage − 100 mV/div

TRANSIENT RESPONSE

VI = 5 V

2 A to 6.5 A

t − Time − 20 ∝s/div

Figure 17

IO − Output Current − 2 A/div

Input Voltage − 2 V/div

SLOW-START TIMING

VI = 5 V,

0.04∝F

Slow-start Cap

4.0 ms/div

Figure 18

Output Voltage − 2 V/div

(1)Safe operating area is applicable to the test board conditions in the Dissipation Ratings

12