TPS62660_15 Datasheet, PDF (7/29 Pages) Texas Instruments – 1000-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

TPS62660, TPS62665
www.ti.com
SLVS871C – FEBRUARY 2010 – REVISED JULY 2011
TYPICAL CHARACTERISTICS (continued)
EFFICIENCY
vs
LOAD CURRENT
EFFICIENCY
vs
LOAD CURRENT
100
V_O = 1.2 V
90
80
V_I = 2.7 V
PFM/PWM Operation
91
90 ^{VI = 3.6 V}
L = Aircoil (0.5 mH, DCR = 20 mW)
89
V_O = 1.8 V (TPS62660)
PFM/PWM Operation
88
70
V_I = 3.6 V
PFM/PWM Operation
60
V_I = 4.2 V
50
PFM/PWM Operation
40
87
86
85
L = muRata LQM21PN1R0
84
83
82
L = muRata LQM21PN0R54
81
30
80
20
79
78
10
77
0
76
0.1
1
10
100
1000
1
I_O - Load Current - mA
10
100
I_O - Load Current - mA
1000
Figure 5.
Figure 6.
EFFICIENCY
vs
INPUT VOLTAGE
100
98 ^VO ^{= 1.8 V (TPS62660)}
96 ^{PFM/PWM Operation}
94
92
90
I_O = 300 mA
88
86
84
82
I_O = 100 mA
80
78
I_O = 1 mA
76
74
72
70
2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
V_I - Input Voltage - V
Figure 7.
PEAK-TO-PEAK OUTPUT RIPPLE VOLTAGE
vs
LOAD CURRENT
30
28 ^VO ^{= 1.8 V (TPS62660)}
26
24
V_I = 4.8 V
22
20
18
V_I = 3.6 V
16
14
12
V_I = 2.5 V
10
8
6
4
2
0
0 50 100 150 200 250 300 350 400 450 500 550 600
I_O - Load Current - mA
Figure 8.
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