VLDO1

LDO1

200mA

FB2

L2

DCDC2

400mA

TPS65708

Vout2=1.8V

Vout3=2.8V

FB1

1.5 H

m

L1

DCDC1

400mA

Vout1=3.3V

VIN1

VIN2

PGND1

PGND2

VCC

MODE

VLDO2

LDO2

200mA

Vout4=1.2V

5Vor3.3V

dependingonLED

PWM

ISINK

VINLDO1

VINLDO2

2.2 F

m

10 F

m

5V

dimingsignal

fromuP

7.5mA

10 F

m

2.2 F

m

2.2 F

m

2.2 F

m

10 F

m

10 F

m

1.5 H

m

TPS65708

www.ti.com

SLVSAE1A

– OCTOBER 2010 – REVISED FEBRUARY 2011

FUNCTIONAL BLOCK DIAGRAM

PARAMETER MEASUREMENT INFORMATION

SETUP

The graphs below were taken using the TPS65708EVM with the passive components as listed:

L(Vout1) = L(Vout2) = BRC1608T1R5M (1.5

μH)

C(Vout1) = C(Vout2) = GRM188R60J106 (10

μF / 6.3V)

C(LDO1) = C(LDO2) = GRM185R60J225 (2.2

μF / 6.3V)

C(VIN1) = C(VIN2) = GRM188R60J106 (10

μF / 6.3V)

C(VINLDO1) = C(VINLDO2) = GRM185R60J225 (2.2

μF / 6.3V)

© 2010–2011, Texas Instruments Incorporated

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