100
95
90
85
80
75
70
65
60
55
50
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
I
(A)
OUT
Efficiency(%)
V
= 3.0 V
IN
V
= 3.3 V
V
= 3.6 V
V
= 4.2 V
V
= 5.0V
IN
IN
IN
IN
L = 1.0 H (LQH441R0)
C
= 10 F (0603 size)
m
m
OUT
V
=1.8 V
Mode: Auto PFM/PWM
OUT
EFFICIENCY vs LOAD CURRENT
2 V/div
500 mA/div
2 A/div
1 V/div
500 mA/div
Time (100 s/div)
m
V
= 3.6 V
V
= 1.8 V
Load = R2R
IN
OUT
L = 1.2 H
C
= 10 F
m
m
OUT
TPS62065 Startup
TPS62065/67EVM Test Data
www.ti.com
6
TPS62065/67EVM Test Data
Figure 4
through
Figure 11
present typical performance curves for the TPS62065/67EVM. Actual
performance data can be affected by measurement techniques and environmental variables; therefore,
these curves are presented for reference and may differ from actual results obtained by some users.
6.1
Efficiency
Figure 4
shows the typical efficiency performance for the TPS62065 and TPS62067.
Figure 4. TPS62065, TPS62067 Efficiency vs Load Current
6.2
Start-up: TPS62065
Figure 5
shows the typical start-up performance for the TPS62065 using the TPS62065EVM.
Conditions: VIN = 3.6 V, V
OUT
= 1.8 V
Figure 5. TPS62065 Startup into 2.2-
Ω
Load
8
TPS62065/67EVM
SLVU364 – March 2010
Submit Documentation Feedback
Copyright © 2010, Texas Instruments Incorporated
