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TPS62350_07

更新时间： 2024-11-18 04:48:47
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德州仪器 - TI 转换器
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46页 1401K
描述
800-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER WITH I2C⑩ COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING

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TPS62350_07 数据手册

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CSP-12  
QFN-10  
TPS62350, TPS62351  
TPS62352, TPS62353, TPS62354  
www.ti.com  
SLVS540B–MAY 2006–REVISED DECEMBER 2006  
800-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER  
WITH I2C™ COMPATIBLE INTERFACE IN CHIP SCALE PACKAGING  
FEATURES  
DESCRIPTION  
•
•
•
•
•
•
•
•
88% Efficiency at 3-MHz Operation  
800-mA Output Current at VI = 2.7 V  
3-MHz Fixed Frequency Operation  
Best in Class Load and Line Transient  
Complete 1-mm Component Profile Solution  
±2% PWM DC Voltage Accuracy  
35-ns Minimum On-Time  
The TPS6235x device is  
a
high-frequency  
synchronous step-down dc-dc converter optimized  
for battery-powered portable applications. Intended  
for low-power applications, the TPS6235x supports  
up to 800-mA load current and allows the use of  
small, low cost inductors and capacitors.  
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 0.6 V, the device supports  
low-voltage DSPs and processors core power  
supplies in smart-phones, PDAs, and handheld  
computers.  
Efficiency Optimized Power-Save Mode  
(Light PFM)  
•
Transient Optimized Power-Save Mode  
(Fast PFM)  
•
•
•
•
28-µA Typical Quiescent Current  
I2C Compatible Interface up to 3.4 Mbps  
Pin-Selectable Output Voltage  
The TPS6235x operates at 3-MHz fixed 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 2 µA.  
Synchronizable On the Fly to External  
Clock Signal  
•
Available in a 10-Pin QFN (3 x 3 mm) and  
12-Pin NanoFree™ (CSP) Packaging  
The serial interface is compatible with Fast/Standard  
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 12.5 mV, for reprogramming  
the mode of operation (Light PFM, Fast PFM or  
Forced PWM) or disable/enabling the output voltage.  
APPLICATIONS  
•
•
SmartReflex™ Compliant Power Supply  
Split Supply DSPs and µP Solutions  
OMAP™, XSCALE™  
•
•
•
•
Cell Phones, Smart-Phones  
PDAs, Pocket PCs  
Digital Cameras  
Micro DC-DC Converter Modules  
EFFICIENCY vs LOAD CURRENT  
TYPICAL APPLICATION  
100  
90  
TPS62350YZG  
PVIN  
AVIN  
V
FB  
I
80  
V
O
C1  
SW  
70  
60  
50  
40  
30  
20  
10  
0
L1  
1 mH  
PGND  
PGND  
C2  
10 mF  
2.7 V .. 5.5 V  
A
AGND  
A
EN  
V
= Roof  
O
V
V
= 3.6 V  
VSEL  
I
V
= Floor  
2
O
= 1.35 V  
O
SDA  
SCL  
I C Bus  
LPFM/PWM Mode  
up to 3.4 Mbips  
0.1  
1
10  
100 1000  
SYNC  
I
− Output Current − mA  
O
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.  
NanoFree, SmartReflex, OMAP, PowerPAD are trademarks of Texas Instruments.  
XSCALE is a trademark of Intel Corporation.  
I2C is a trademark of Philips Corporation.  
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 © 2006, Texas Instruments Incorporated  
1234567...46

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