TPS65058_1 Datasheet, PDF (1/26 Pages) Texas Instruments – 2.25 MHz Dual STEP DOWN CONVERTER WITH 3 LOW-INPUT VOLTAGE LDOs

TPS65058
www.ti.com................................................................................................................................................... SLVS851A – MAY 2008 – REVISED SEPTEMBER 2008
2.25 MHz Dual STEP DOWN CONVERTER
WITH 3 LOW-INPUT VOLTAGE LDOs
FEATURES
1
•2 Up To 95% Efficiency
• Output Current for DC/DC Converters:
– DCDC1 = 0.6A; DCDC2 = 1A
• V_IN Range for DC/DC Converters From
2.5V to 6V
• Dynamic Voltage Switching for Processor
Core Supply Supported
• 2.25MHz Fixed Frequency Operation
• Power Save Mode at Light Load Current
• 180° Out-of-Phase Operation
• Output Voltage Accuracy in PWM mode ±1%
• Total Typical 32µA Quiescent Current for Both
DC/DC Converters
• 100% Duty Cycle for Lowest Dropout
• One General-Purpose 400mA LDO
• Two General-Purpose 200mA LDOs
• V_IN Range for LDOs from 1.5V to 6.5V
• Reset Generator and Power Monitor
• Available in a 4 mm x 4 mm 24-Pin QFN
Package
APPLICATIONS
• Satellite Radio Modules
10 W
VIN
1 mF
ENABLE
VCC
EN_DCDC1
MODE
ENABLE
Voltage
Switching (1/0)
EN_DCDC2
DEF_DCDC2
VIN
2.2 mF
ENABLE
Voltage
Switching (1/0)
VIN
2.2 mF
ENABLE
VIN_LDO1
EN_LDO1
DEF_LDO
VIN_LDO2/
EN_LDO2
TPS 65058
DCDC1(I/O)
STEP-DOWN
CONVERTER
PGOOD1
DCDC2(core)
STEP-DOWN
CONVERTER
PGOOD2
VLDO1
400 mA LDO
VLDO2
200 mA LDO
ENABLE
EN_LDO3
VLDO3
200 mA LDO
RESET
AGND
VINDCDC1/2
2.2 mH
L1
FB_DCDC
PGND1
VIN
22 mF
3.3 V
10uF
2.2 mH
L2
FB_DCDC2
PGND2
1.8 V / 1.2 V
10 mF
VLDO1
3.3 V / 3.3 V
4.7 mF
VLDO2
1.8 V / 1.2 V
2.2 mF
VLDO3
RESET
1.8 V / 1.3 V
2.2 mF
I/O Voltage
R19
NOTE: Other voltage options available upon
request. Contact your Texas
Instruments representative.
DESCRIPTION
The TPS65058 is an integrated Power Management IC for applications powered by one Li-Ion or Li-Polymer cell,
which require multiple power rails. The TPS65058 provides two highly efficient, 2.25MHz step down converters
targeted at providing the core voltage and I/O voltage in a processor based system. Both step-down converters
enter a low power mode at light load for maximum efficiency across the widest possible range of load currents.
For low noise applications, the devices can be forced into fixed frequency PWM mode by pulling the MODE pin
high. Both converters allow the use of small inductors and capacitors to achieve a small solution size. TPS65058
provides an output current of up to 0.6A on the DCDC1 converter, and up to 1A on the DCDC2 converter. The
TPS65058 also integrates one 400mA LDO and two 200mA LDO voltage regulators, which can be turned on/off
using separate enable pins on each LDO. Each LDO operates with an input voltage range between 1.5V and
6.5V allowing them to be supplied from one of the step down converters or directly from the main battery.
The TPS65058 comes in a small 24-pin leadless package (4mm × 4mm QFN) with a 0,5mm pitch.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated