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TPS62420DRC

更新时间： 2024-11-15 04:48:43
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
32页 1172K
描述
2.25MHz 600mA/1000mA Dual Step Down Converter In Small 3x3mm QFN Package

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TPS62420DRC 数据手册

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TPS62420  
www.ti.com  
SLVS676B–JUNE 2006–REVISED OCTOBER 2006  
2.25MHz 600mA/1000mA Dual Step Down Converter In Small 3x3mm QFN Package  
FEATURES  
DESCRIPTION  
•
•
•
•
•
•
High Efficiency—up to 95%  
The TPS62420 device is  
a synchronous dual  
step-down DC-DC converter optimized for battery  
powered portable applications. It provides two  
independent output voltage rails powered by 1-cell  
Li-Ion or 3-cell NiMH/NiCD batteries. The device is  
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 600 mA and 1000 mA  
Adjustable Output Voltage From 0.6 V to VIN  
EasyScale™ Optional One Pin Serial Interface  
for Dynamic Output Voltage Adjustment  
With an input voltage range of 2.5V to 6V, the  
TPS62420 is ideal to power portable applications like  
smart phones, PDAs, and other portable equipment.  
•
•
•
•
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. It  
therefore supports Dynamic Voltage Scaling for low  
power DSP and processors.  
Output Voltage Accuracy in PWM Mode ±1%  
Typical 32 µA Quiescent Current for both  
Converters  
•
•
100% Duty Cycle for Lowest Dropout  
The TPS62420 operates at 2.25MHz fixed switching  
frequency and enter 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. The device allows  
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 TPS62420 is available in a 10-pin leadless  
package (3×3mm QFN)  
TPS62420  
VIN 2.5V – 6V  
VIN  
FB 1  
SW1  
100  
L1  
VOUT1 = 1.5V  
up to 600mA  
CIN  
90  
2.2 μH  
R11  
270kΩ  
10 μF  
80  
COUT1 = 22 µF  
DEF_1  
R12  
180kΩ  
70  
60  
50  
40  
30  
20  
10  
0
V
= 1.8V  
OUT2  
V
= 3.6V  
EN_1  
IN  
MODE/DATA = 0  
L2  
VOUT2 = 1.8V  
Up to 1000mA  
COUT2 = 22 µF  
V
= 1.5V  
OUT1  
EN_2  
SW2  
2.2 μH  
Cff2  
33pF  
R21  
360kΩ  
MODE/  
DATA  
ADJ2  
GND  
R22  
180kΩ  
0.01  
0.1  
1
10  
100  
1000  
I
mA  
OUT  
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, Texas Instruments Incorporated  
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