Datasheet

VLDO1
LDO1
200mA
FB2
L2
DCDC2
400mA
TPS65708
Vout2=1.8V
Vout3=2.8V
FB1
1.5 Hm
L1
DCDC1
400mA
Vout1=3.3V
VIN1
VIN2
PGND1
PGND2
VCC
MODE
VLDO2
LDO2
200mA
Vout4=1.2V
5Vor3.3V
dependingonLED
PWM
ISINK
VINLDO1
VINLDO2
2.2 Fm
10 Fm
5V
dimingsignal
fromuP
7.5mA
10 Fm
2.2 Fm
2.2 Fm
2.2 Fm
10 Fm
10 Fm
1.5 Hm
TPS65708
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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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