Datasheet
VLDO1
LDO1
200mA
FB2
L2
DCDC2
400mA
TPS65708
Vout2=1.8V
Vout3=2.8V
FB1
1.5 Hm
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 Fm
10 Fm
5V
dimingsignal
fromuP
7.5mA
10 Fm
2.2 Fm
2.2 Fm
2.2 Fm
10 Fm
10 Fm
1.5 Hm
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 (1.5μH)
C(Vout1) = C(Vout2) = GRM188R60J106 (10μF / 6.3V)
C(LDO1) = C(LDO2) = GRM185R60J225 (2.2μF / 6.3V)
C(VIN1) = C(VIN2) = GRM188R60J106 (10μF / 6.3V)
C(VINLDO1) = C(VINLDO2) = GRM185R60J225 (2.2μF / 6.3V)
V
CC
= VIN1= VIN2 = VINLDO1 = VINLDO2 unless otherwise noted
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