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6 tps62065/67evm test data, 1 efficiency, 2 start-up: tps62065 – Texas Instruments TPS62065 User Manual

Page 8

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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

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