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TPS62321DRCT PDF预览

TPS62321DRCT

更新时间: 2024-11-18 13:14:51
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TPS62321DRCT 数据手册

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TPS62300, TPS62301, TPS62302  
TPS62303, TPS62305, TPS62311  
CSP-8  
QFN-10  
TPS62313, TPS62320, TPS62321  
www.ti.com  
SLVS528BJULY 2004REVISED JUNE 2005  
500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER  
IN CHIP SCALE PACKAGING  
FEATURES  
DESCRIPTION  
Up to 93% Efficiency at 3-MHz Operation  
The TPS623xx device is a high-frequency synchron-  
ous 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.  
Up to 500-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  
-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  
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 appli-  
cations, 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.  
100% Duty Cycle for Lowest Dropout  
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) and  
Highly Reliable 8-Pin NanoFree™ and  
NanoStar™ (CSP) Packaging  
The TPS623xx is available in a 10-pin leadless  
package (3 x 3 mm QFN) and an 8-pin chip-scale  
package (CSP).  
APPLICATIONS  
Cell Phones, Smart-Phones  
WLAN and Bluetooth™ Applications  
Micro DC-DC Converter Modules  
PDAs, Pocket PCs  
USB-Based DSL Modems  
Digital Cameras  
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  
L = 2.2 µH,  
4.7 µF  
MODE/SYNC  
GND  
ADJ  
FB  
10  
0
C
O
= 4.7 µF  
0.1  
1
10  
100  
1 k  
I
− Load Current − mA  
O
Figure 1. Smallest Solution Size Application  
(Fixed Output Voltage)  
Figure 2. Efficiency vs Load Current  
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, NanoStar, TMS320 are trademarks of Texas Instruments.  
Bluetooth is a trademark of Bluetooth SIG, Inc.  
PowerPAD is a trademark of Texas Instsruments.  
UNLESS OTHERWISE NOTED this document contains PRO-  
DUCTION DATA information current as of publication date. Prod-  
ucts conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily  
include testing of all parameters.  
Copyright © 2004–2005, Texas Instruments Incorporated  

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