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TPS62304 PDF预览

TPS62304

更新时间: 2024-09-28 04:48:47
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德州仪器 - TI 转换器
页数 文件大小 规格书
37页 1393K
描述
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING

TPS62304 数据手册

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TPS62300, TPS62301, TPS62302  
TPS62303, TPS62304, TPS62305,  
CSP-8  
QFN-10  
TPS62311, TPS62313, TPS62315, TPS62320, TPS62321  
www.ti.com  
SLVS528EJULY 2004REVISED NOVEMBER 2007  
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER  
IN CHIP SCALE PACKAGING  
1
FEATURES  
234  
Up to 93% Efficiency at 3-MHz Operation  
DESCRIPTION  
Up to 500-mA Output Current at VI = 2.7 V  
3-MHz Fixed Frequency Operation  
The TPS623xx device is  
a
high-frequency  
synchronous step-down dc-dc converter optimized for  
battery-powered portable applications. Intended for  
low-power applications, the TPS623xx supports up to  
500-mA load current and allows the use of tiny, low  
cost chip inductor and capacitors.  
Best in Class Load and Line Transient  
Complete 1-mm Component Profile Solution  
-0.5% / +1.3% PWM DC Voltage Accuracy Over  
Temperature  
The device is ideal for mobile phones and similar  
portable applications powered by a single-cell Li-Ion  
battery or by 3-cell NiMH/NiCd batteries. With an  
output voltage range from 5.4 V down to 0.6 V, the  
device supports the low-voltage TMS320™ DSP  
family, processors in smart-phones, PDAs as well as  
notebooks, and handheld computers.  
35-ns Minimum On-Time  
Power-Save Mode Operation at Light Load  
Currents  
Fixed and Adjustable Output Voltage  
Only 86-µA Quiescent Current  
100% Duty Cycle for Lowest Dropout  
The TPS62300 operates at 3-MHz fixed switching  
frequency and enters the power-save mode operation  
at light load currents to maintain high efficiency over  
the entire load current range. For low noise  
applications, the device can be forced into fixed  
frequency PWM mode by pulling the MODE/SYNC  
pin high. The device can also be synchronized to an  
external clock signal in the range of 3 MHz. In the  
shutdown mode, the current consumption is reduced  
to less than 1 µA.  
Synchronizable On the Fly to External  
Clock Signal  
Integrated Active Power-Down Sequencing  
(TPS6232x only)  
Available in a 10-Pin QFN (3 x 3 mm), 8-Pin  
NanoFree™, and NanoStar™ (CSP) Packaging  
APPLICATIONS  
Cell Phones, Smart-Phones  
WLAN and Bluetooth™ Applications  
Micro DC-DC Converter Modules  
PDAs, Pocket PCs  
USB-Based DSL Modems  
Digital Cameras  
The TPS623xx is available in a 10-pin leadless  
package (3 x 3 mm QFN) and an 8-pin chip-scale  
package (CSP).  
100  
V = 3.6 V,  
I
90  
80  
70  
60  
50  
40  
30  
20  
V
= 1.8 V  
O
TPS62303YZD  
L1  
2.7 V . . 6 V  
V
A2  
B2  
B1  
D1  
C2  
D2  
O
VIN  
EN  
SW  
1.8 V/500 mA  
V
C2  
1 µH  
I
C1  
VOUT  
4.7 µF  
C1  
A1  
4.7 µF  
MODE/SYNC  
GND  
ADJ  
FB  
L = 2.2 µH,  
Figure 1. Smallest Solution Size Application  
(Fixed Output Voltage)  
10  
0
C
O
= 4.7 µF  
0.1  
1
10  
100  
1 k  
I
− Load Current − mA  
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
3
4
NanoFree, NanoStar, TMS320 are trademarks of Texas Instruments.  
Bluetooth is a trademark of Bluetooth SIG, Inc.  
PowerPAD is a trademark of Texas Instsruments.  
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 © 2004–2007, Texas Instruments Incorporated  

TPS62304 替代型号

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