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TPS62421 PDF预览

TPS62421

更新时间: 2024-09-30 11:06:31
品牌 Logo 应用领域
德州仪器 - TI 开关控制器开关式稳压器开关式控制器电源电路转换器开关式稳压器或控制器
页数 文件大小 规格书
44页 1185K
描述
采用 3x3mm QFN 小型封装的 2.25MHz 600mA/1000mA 双路降压转换器

TPS62421 数据手册

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TPS62400, TPS62401  
TPS62402, TPS62403, TPS62404  
www.ti.com  
SLVS681E JUNE 2006REVISED APRIL 2010  
2.25MHz 400mA/600mA Dual Step-Down Converter In Small 3x3mm QFN Package  
Check for Samples: TPS62400, TPS62401, TPS62402, TPS62403, TPS62404  
1
FEATURES  
DESCRIPTION  
2
High Efficiency—Up to 95%  
VIN Range From 2.5 V to 6 V  
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.  
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, and TPS62404 support one pin controlled  
simple Dynamic Voltage Scaling for low power  
processors.  
Output Voltage Accuracy in PWM Mode ±1%  
Typical 32-mA Quiescent Current for Both  
Converters  
100% Duty Cycle for Lowest Dropout  
Available in a 10-Pin QFN (3×3mm)  
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 1.2mA, typical. The  
devices allow the use of small inductors and  
capacitors to achieve a small solution size.  
APPLICATIONS  
Cell Phones, Smart-phones  
PDAs, Pocket PCs  
OMAP™ and Low Power DSP Supply  
Portable Media Players  
Digital Radio  
Digital Cameras  
TPS62401  
VIN 2.5 V – 6 V  
The TPS62400 is available in a 10-pin leadless  
package (3×3mm QFN)  
VIN  
FB 1  
2.2 mH  
V
: 1.575 V  
out1  
400 mA  
10 mF  
SW1  
100  
DEF_1  
10 mF  
90  
EN_1  
EN_2  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
OUT2  
= 1.8 V  
2.2 mH  
V
= 3.6 V  
MODE/DATA = 0  
IN  
V
: 1.8 V  
out2  
600 mA  
SW2  
MODE/  
DATA  
V
OUT1  
= 1.575 V  
10 mF  
ADJ2  
GND  
0.01  
0.1  
1
10  
100  
1000  
I
OUT  
mA  
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
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 © 2006–2010, Texas Instruments Incorporated  
 

TPS62421 替代型号

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具有可调频率的汽车类 2.75V 至 6V 双路 1A 输出降压转换器 | RQR | 1