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TPS650244

更新时间： 2024-10-14 07:04:51
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Power Management ICs for Li-Ion Powered Systems

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TPS650244 数据手册

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TPS650240, TPS650241  
TPS650242, TPS650243  
TPS650244, TPS650245  
www.ti.com  
SLVS774A–JUNE 2007–REVISED DECEMBER 2007  
Power Management ICs for Li-Ion Powered Systems  
1
FEATURES  
•
Thermal Shutdown Protection  
•
1.6A, 1.0A or 0.8A, 97% Efficient Step-Down  
Converter for System Voltage (VDCDC1)  
APPLICATIONS  
•
•
•
•
•
PDA  
–
3.3V or 2.80V or Adjustable  
Cellular/Smart Phone  
GPS  
Digital Still Camera  
Split Supply DSP and µP Solutions:, Samsung  
ARM-Based Processors, etc.  
•
1.6A, 1.0A or 0.8A, up to 95% Efficient  
Step-Down Converter for Memory Voltage  
(VDCDC2)  
–
1.8V or 2.5V or Adjustable  
•
•
0.8A, 90% Efficient Step-Down Converter for  
Processor Core (VDCDC3)  
DESCRIPTION  
Two Selectable Voltages for VDCDC3  
The TPS65024x are integrated Power Management  
ICs for applications powered by one Li-Ion or  
Li-Polymer cell, which require multiple power rails.  
The TPS65024x provide three highly efficient,  
step-down converters targeted at providing the core  
voltage, peripheral, I/O and memory rails in a  
processor based system. All three step-down  
converters enter a low power mode at light load for  
maximum efficiency across the widest possible range  
of load currents. The converters can be forced into  
fixed frequency PWM mode by pulling the MODE pin  
high. The TPS65024x also integrate two general  
purpose 200mA LDO voltage regulators, which are  
enabled with an external input pin. 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 battery.  
The output voltage of the LDOs can be set with an  
external resistor divider for maximum flexibility.  
Additionally there is a 30mA LDO typically used to  
provide power in a processor based system to a  
voltage rail that is always on. TPS65024x provide  
voltage scaling on DCDC3 using the DEFDCDC3 pin.  
This pin either needs to be connected to a logic HIGH  
or logic LOW level to set the output voltage of  
DCDC3. TPS65024x come in a small 5mm x 5mm 32  
pin QFN package (RHB).  
–
–
–
–
–
–
TPS650240:  
–
–
DEFDCDC3= LOW: VO = 1.0V  
DEFDCDC3= HIGH: VO = 1.3V  
TPS650241:  
–
–
DEFDCDC3= LOW: VO = 0.9V  
DEFDCDC3= HIGH: VO= 1.375V  
TPS650242:  
–
–
DEFDCDC3= LOW: VO = 1.0V  
DEFDCDC3= HIGH: VO = 1.5V  
TPS650243:  
–
–
DEFDCDC3= LOW: VO = 1.0V  
DEFDCDC3= HIGH: VO = 1.2V  
TPS650244:  
–
–
DEFDCDC3= LOW: VO = 1.55V  
DEFDCDC3= HIGH: VO = 1.6V  
TPS650245:  
–
–
DEFDCDC3= LOW: VO = 0.9V  
DEFDCDC3= HIGH: VO = 1.1V  
•
•
30mA LDO for Vdd_alive  
2 × 200mA General Purpose LDOs (LDO1 and  
LDO2)  
•
Dynamic Voltage Management for Processor  
Core  
•
•
•
•
LDO1 and LDO2 Voltage Externally Adjustable  
Separate Enable Pins for Inductive Converters  
2.25MHz Switching Frequency  
85µA Quiescent Current  
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.  
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 © 2007, Texas Instruments Incorporated  
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TPS650244 替代型号

型号 品牌 替代类型 描述 数据表
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