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TPS62650

更新时间： 2024-11-15 07:04:51
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德州仪器 - TI 转换器功效
页数 文件大小 规格书
37页 1032K
描述
800-mA 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER WITH I2CTM COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING

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TPS62650 数据手册

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TPS62650  
TPS62651  
CSP-9  
www.ti.com ................................................................................................................................................................................................. SLVS808–AUGUST 2009  
800-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER  
WITH I2CTM COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING  
1
FEATURES  
2
•
•
•
•
•
•
•
•
•
•
•
•
86% Efficiency at 6 MHz Operation  
DESCRIPTION  
38µA Quiescent Current  
The TPS6265x device is  
a
high-frequency  
Wide VIN Range From 2.3 V to 5.5 V  
6MHz Regulated Frequency Operation  
Best-In-Class Load and Line Transient  
±2% PWM DC Voltage Accuracy  
synchronous step-down dc-dc converter optimized for  
battery-powered portable applications. Intended for  
low-power applications, the TPS6265x supports up to  
800mA load current and allows the use of small, low  
cost inductors and capacitors.  
Automatic PFM/PWM Mode Switching  
Low Ripple Light-Load PFM  
I2C Compatible Interface up to 3.4 Mbps  
Pin-Selectable Output Voltage (VSEL)  
Internal Soft-Start, <150-µs Start-Up Time  
The device is ideal for mobile phones and similar  
portable applications powered by a single-cell Li-Ion  
battery. With an output voltage range adjustable via  
I2C interface down to 0.75V, the device supports  
low-voltage DSPs and processors core power  
supplies in smart-phones and handheld computers.  
Current Overload and Thermal Shutdown  
Protection  
The TPS6265x operates at  
a regulated 6MHz  
switching frequency and enters the efficiency  
optimized power-save mode operation at light load  
currents to maintain high efficiency over the entire  
load current range. In the shutdown mode, the  
current consumption is reduced to less than 3.5µA.  
•
•
Three Surface-Mount External Components  
Required (One MLCC Inductor, Two Ceramic  
Capacitors)  
Complete Sub 1-mm Component Profile  
Solution  
Total Solution Size <13mm2  
The serial interface is compatible with Standard,  
Fast/Fast Plus and High-Speed mode I2C  
specification allowing transfers at up to 3.4 Mbps.  
This communication interface is used for dynamic  
voltage scaling with voltage steps down to 12.5mV,  
for setting the output voltage or reprogramming the  
mode of operation (PFM/PWM or Forced PWM) for  
instance.  
•
•
Available in a 9-Pin NanoFree™ (CSP)  
Packaging  
APPLICATIONS  
•
•
•
•
SmartReflex™ Compliant Power Supply  
OMAP™ Application Processor Core Supply  
Cell Phones, Smart-Phones  
The TPS6265x is available in an 9-pin chip-scale  
package (CSP).  
Micro DC-DC Converter Modules  
100  
VI = 2.7V  
V
= 1.2V  
O
PFM/PWM Operation  
TPS62650  
90  
80  
70  
60  
50  
VIN  
V
FB  
I
V
O
C1  
SW  
L1  
0.47mH  
C2  
4.7mF  
2.3 V .. 5.5 V  
4.7mF  
VI = 3.6V  
PFM/PWM Operation  
GND  
40  
30  
20  
10  
0
EN  
VI = 3.6V  
VI = 4.2V  
V
= Roof  
O
Forced PWM Operation  
PFM/PWM Operation  
VSEL  
V
= Floor  
2
O
SDA  
SCL  
I C Bus  
0.1  
1
10  
100  
1000  
up to 3.4 Mbips  
I
− Load Current − mA  
O
Figure 1. Typical Application  
Figure 2. Efficiency vs Load Control  
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.  
2
NanoFree, SmartReflex, OMAP are trademarks of Texas Instruments.  
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 © 2009, Texas Instruments Incorporated  
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