Datasheet

APPLICATION INFORMATION
TYPICAL CONFIGURATION FOR THE TITAN 2 PROCESSOR
VDDIO
VDCDC3
L3
VDD _ MEM
VDCDC2
L2
core
VINDCDC3
VINDCDC1
DEFDCDC1
DEFDCDC3
LDO2
EN_DCDC3
EN_DCDC2
VIO
LDO1
DCDC3
DCDC2
1600mA
VINLDO1/2
1
mF
LDO2
200mA
Titan
VDCDC1
3.3 Hm
L1
DCDC1
800mA
10 Fm
VINDCDC2
EN_DCDC1
+
-
PWRFAIL_SNS
POWERFAIL
RTCcore
(1.2V)
RTCI /O
TPS650244
DEFDCDC2
VIN
VIN
VIN
VDCDC2
VIN
(setto1.8V)
EN_LDO1/2
EN_VDDalive
VIN
Vdd_alive 1.2V
Vcc
1 Fm
VIN
InputVoltage
TBD
VIN
FB_LDO2
FB_LDO1
300kW
130kW
100kW
510kW
220kW
62kW
LPS3015
LPS3015
VLCF4020
open
(notused)
220kW
800mA
1MW
(3.3V)
(1.2V)
(1.8V)
(3.3V)
2.2 Hm
2.2 Hm
22 Fm
22 Fm
2.2 Fm
2.2 Fm
200mA
LDO1
10 Fm
10 Fm
10 Fm
TPS650240 , , TPS650241
TPS650242 , TPS650243
TPS650244 , TPS650245
SLVS774B – JUNE 2007 – REVISED JULY 2009 .............................................................................................................................................................. www.ti.com
The core voltage is generated using DCDC2 with the output voltage set to 1.2V using a resistor divider at
DEFDCDC2 as only DCDC2 can support an output current of up to 1.6A. DCDC3 is used for the memory voltage
of 1.8V. As DCDC3 does not support an external resistor divider, the output voltage is programmed to 1.6V by
setting DEFDCDC3 = HIGH. In addition, there is a resistor at the input of the internal voltage divider at pin
VDCDC3 which adds another 200mV. The internal resistance at VDCDC3 when programmed to 1.6V is 480k Ω ,
so the external resistance needed to increase the output voltage from 1.6V to 1.8V is 60k Ω (62k Ω ). The typical
configuration for the Titan 2 processor is shown in Figure 18 .
Figure 18. Titan Processor Configuration
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