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TPS62400_07

更新时间： 2024-11-15 04:48:43
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德州仪器 - TI 转换器
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43页 1414K
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2.25MHz 400mA/600mA Dual Step-Down Converter In Small 3x3mm QFN Package

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TPS62400_07 数据手册

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TPS62400, TPS62401  
TPS62402, TPS62403  
www.ti.com  
SLVS681D–JUNE 2006–REVISED FEBRUARY 2007  
2.25MHz 400mA/600mA Dual Step-Down Converter In Small 3x3mm QFN Package  
FEATURES  
DESCRIPTION  
•
•
•
•
•
•
High Efficiency—Up to 95%  
The TPS6240x device series are synchronous dual  
step-down DC-DC converters optimized for battery  
powered portable applications. They provide two  
independent output voltage rails powered by 1-cell  
Li-Ion or 3-cell NiMH/NiCD batteries. The devices are  
also suitable to operate from a standard 3.3V or 5V  
voltage rail.  
VIN Range From 2.5 V to 6 V  
2.25 MHz Fixed Frequency Operation  
Output Current 400 mA and 600 mA  
Adjustable Output Voltage From 0.6V to VIN  
Pin Selectable Output Voltage Supports  
Simple Dynamic Voltage Scaling  
With an input voltage range of 2.5V to 6V the  
TPS62400 is ideal to power portable applications like  
smart phones, PDAs and other portable equipment.  
•
•
•
•
•
EasyScale™ Optional One-Pin Serial Interface  
Power Save Mode at Light Load Currents  
180° Out of Phase Operation  
With the EasyScale™ serial interface the output  
voltages can be modified during operation. The fixed  
output voltage versions TPS62401, TPS62402,  
TPS62403 support one pin controlled simple  
Dynamic Voltage Scaling for low power processors.  
Output Voltage Accuracy in PWM Mode ±1%  
Typical 32-µA Quiescent Current for Both  
Converters  
•
•
100% Duty Cycle for Lowest Dropout  
The TPS6240x operates at 2.25MHz 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 devices can be forced into  
fixed frequency PWM mode by pulling the  
MODE/DATA pin high. In the shutdown mode, the  
current consumption is reduced to 1.2µA, typical.  
The devices allow the use of small inductors and  
capacitors to achieve a small solution size.  
Available in a 10-Pin QFN (3×3mm)  
APPLICATIONS  
•
•
•
•
•
•
Cell Phones, Smart-phones  
PDAs, Pocket PCs  
OMAP™ and Low Power DSP Supply  
Portable Media Players  
Digital Radio  
Digital Cameras  
The TPS62400 is available in a 10-pin leadless  
package (3×3mm QFN)  
TPS62401  
VIN 2.5 V – 6 V  
100  
VIN  
FB 1  
2.2 mH  
V
: 1.575 V  
90  
out1  
400 mA  
10 mF  
SW1  
80  
DEF_1  
10 mF  
70  
60  
50  
40  
30  
20  
10  
0
V
OUT2  
= 1.8 V  
EN_1  
EN_2  
V
= 3.6 V  
MODE/DATA = 0  
IN  
V
OUT1  
= 1.575 V  
2.2 mH  
V
: 1.8 V  
SW2  
out2  
600 mA  
MODE/  
DATA  
10 mF  
ADJ2  
GND  
0.01  
0.1  
1
10  
100  
1000  
I
OUT  
mA  
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.  
EasyScale, OMAP, PowerPAD 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 © 2006–2007, Texas Instruments Incorporated  
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