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TPS62661

更新时间： 2024-11-15 07:04:51
品牌 Logo 应用领域
德州仪器 - TI 转换器功效
页数 文件大小 规格书
27页 642K
描述
1000-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

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TPS62661 数据手册

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CSP-6  
TPS6266x  
www.ti.com  
SLVS871A –FEBRUARY 2010–REVISED MARCH 2010  
1000-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER  
IN CHIP SCALE PACKAGING  
Check for Samples: TPS6266x  
1
FEATURES  
DESCRIPTION  
2
•
•
•
•
•
•
•
•
•
•
91% Efficiency at 6MHz Operation  
The TPS6266x device is  
a
high-frequency  
31mA Quiescent Current  
synchronous step-down dc-dc converter optimized for  
battery-powered portable applications. Intended for  
low-power applications, the TPS6266x supports up to  
1000mA peak load current, and allows the use of low  
cost chip inductor and capacitors.  
Wide VIN Range From 2.3V to 5.5V  
6MHz Regulated Frequency Operation  
Best in Class Load and Line Transient  
±2% Total DC Voltage Accuracy  
Automatic PFM/PWM Mode Switching  
Low Ripple Light-Load PFM Mode  
Fast Turn-On Time, <60-ms Start-Up Time  
With a wide input voltage range of 2.3V to 5.5V, the  
device supports applications powered by Li-Ion  
batteries with extended voltage range. Different fixed  
voltage output versions are available from 1.2V to  
2.3V.  
Integrated Active Power-Down Sequencing  
(Optional)  
The TPS6266x operates at a regulated 6-MHz  
switching frequency and enters the power-save mode  
operation at light load currents to maintain high  
efficiency over the entire load current range.  
•
•
Current Overload and Thermal Shutdown  
Protection  
Three Surface-Mount External Components  
Required (One MLCC Inductor, Two Ceramic  
Capacitors)  
The PFM mode extends the battery life by reducing  
the quiescent current to 31mA (typ) during light load  
and  
standby  
operation.  
For  
noise-sensitive  
•
Complete Sub 1-mm Component Profile  
Solution  
Total Solution Size <12 mm2  
applications, the device can be forced into fixed  
frequency PWM mode by pulling the MODE pin high.  
In the shutdown mode, the current consumption is  
reduced to less than 1mA.  
•
•
Available in a 6-Pin NanoFree™ (CSP)  
The TPS6266x is available in an 6-pin chip-scale  
package (CSP).  
APPLICATIONS  
•
•
•
•
Cell Phones, Smart-Phones  
PDAs, Pocket PCs  
Portable Hard Disk Drives  
DC/DC Micro Modules  
100  
90  
80  
70  
60  
50  
40  
30  
500  
450  
V = 3.6 V,  
I
V
= 1.8 V  
O
400  
350  
300  
250  
200  
150  
100  
Efficiency  
PFM/PWM Operation  
V
V
OUT  
TPS62661  
VIN  
BAT  
L
3.0 V .. 5.5 V  
1.8 V @ 1000mA  
SW  
0.47 mH  
C
I
FB  
Power Loss  
PFM/PWM Operation  
EN  
C
O
4.7 mF  
4.7 mF  
20  
10  
0
MODE  
GND  
50  
0
0.1  
1
10 100  
- Load Current - mA  
1000  
I
Figure 1. Smallest Solution Size Application  
O
Figure 2. Efficiency vs Load 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.  
2
NanoFree is a trademark 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 © 2010, Texas Instruments Incorporated  
 
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