Datasheet
RECOMMENDED OPERATING CONDITIONS
TPS650250
www.ti.com
........................................................................................................................................................................................... SLVS843 – DECEMBER 2008
MIN NOM MAX UNIT
V
CC
Input voltage range step-down converters, VINDCDC1, VINDCDC2, VINDCDC3 2.5 6.0 V
Output voltage range for step-down converter, VDCDC1
(1)
0.6 VINDCDC1 V
V
O
Output voltage range for mem step-down converter, VDCDC2
(1)
0.6 VINDCDC2 V
Output voltage range for core step-down converter, VDCDC3 0.6 VINDCDC3 V
V
I
Input voltage range for LDOs, VINLDO1, VINLDO2 1.5 6.5 V
V
O
Output voltage range for LDOs 1 3.3 V
I
O
Output current at L, V1DCDC1 1600 mA
L1 Inductor at L1
(2)
1.5 2.2 µ H
C
I
Input capacitor at VINDCDC1
(2)
10 µ F
C
O
Output capacitor at VDCDC1
(2)
10 22 µ F
I
O
Output current at L2, VDCDC2 800 mA
L2 Inductor at L2
(2)
1.5 2.2 µ H
C
I
Input capacitor at VINDCDC2
(2)
10 µ F
C
O
Output capacitor at VDCDC2
(2)
10 22 µ F
I
O
Output current at L3, VDCDC3 800 mA
L3 Inductor at L3
(2)
1.5 2.2 µ H
C
I
Input capacitor at VINDCDC3
(2)
10 µ F
C
O
Output capacitor at VDCDC3
(2)
10 22 µ F
C
I
Input capacitor at VCC
(2)
1 µ F
C
I
Input capacitor at VINLDO
(2)
1 µ F
C
O
Output capacitor at VLDO1, VLDO2
(2)
2.2 µ F
I
O
Output current at VLDO1, VLDO2 200 mA
C
O
Output capacitor at Vdd_alive
(2)
2.2 µ F
I
O
Output current at Vdd_alive 30 mA
T
A
Operating ambient temperature – 40 85 ° C
T
J
Operating junction temperature – 40 125 ° C
R
CC
Resistor from VINDCDC3,VINDCDC2, VINDCDC1 to V
CC
used for filtering
(3)
1 10 Ω
(1) When using an external resistor divider at DEFDCDC2, DEFDCDC1.
(2) See applications section for more information, for V
O
> 2.85V choose 3.3 µ H inductor.
(3) Up to 2.5mA can flow into V
CC
when all 3 converters are running in PWM, this resistor will cause the UVLO threshold to be shifted
accordingly.
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