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TPS62112

更新时间： 2024-11-03 22:52:55
品牌 Logo 应用领域
德州仪器 - TI 转换器
页数 文件大小 规格书
23页 1725K
描述
17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER

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TPS62112 数据手册

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TPS62110  
TPS62111  
TPS62112  
www.ti.com  
SLVS585–JULY 2005  
17-V, 1.5-A, SYNCHRONOUS STEP-DOWN CONVERTER  
FEATURES  
DESCRIPTION  
•
High-Efficiency Synchronous Step-Down  
Converter With up to 95% Efficiency  
The TPS6211x devices are a family of low-noise  
synchronous step-down dc-dc converters that are  
ideally suited for systems powered from a 2-cell Li-ion  
battery or from a 12-V or 15-V rail.  
•
•
3.1-V to 17-V Operating Input Voltage Range  
Adjustable Output Voltage Range From  
1.2 V to 16 V  
The TPS6211x is a synchronous PWM converter with  
integrated – and P-channel power MOSFET switches.  
Synchronous rectification is used to increase ef-  
ficiency and to reduce external component count. To  
achieve highest efficiency over a wide load current  
•
•
Fixed Output Voltage Options Available in  
3.3 V and 5 V  
Synchronizable to External Clock Signal up to  
1.4 MHz  
range, the converter enters  
a
power-saving,  
pulse-frequency modulation (PFM) mode at light load  
currents. Operating frequency is typically 1 MHz,  
allowing the use of small inductor and capacitor  
values. The device can be synchronized to an exter-  
nal clock signal in the range of 0.8 MHz to 1.4 MHz.  
For low noise operation, the converter can be  
operated in PWM-only mode. In the shutdown mode,  
the current consumption is reduced to less than 2 µA.  
The TPS6211x is available in the 16-pin (RSA) QFN  
package, and operates over a free-air temperature  
range of –40°C to 85°C.  
•
•
Up to 1.5-A Output Current  
High Efficiency Over a Wide Load Current  
Range Due to PFM/PWM Operation Mode  
•
100% Maximum Duty Cycle for Lowest  
Dropout  
•
•
•
20-µA Quiescent Current (Typical)  
Overtemperature and Overcurrent Protected  
Available in 16-Pin QFN Package  
APPLICATIONS  
TPS62111  
•
•
•
Point-of-Load Regulation From 12-V Bus  
Organizers, PDAs, and Handheld PCs  
Handheld Scanners  
Efficiency vs Output Current  
100  
4.2 V  
90  
TYPICAL APPLICATION  
80  
6.8 mH  
5 V  
V
= 3.8 V to 17 V  
I
70  
TPS62111  
VIN  
VIN  
EN  
SW  
V = 3.3 V  
O
SW  
1 M  
60  
8.4 V  
PG  
LBO  
FB  
VINA  
C
= 10 mF  
1 mF  
I
CO = 22 mF  
6.3 V  
50  
25 V  
AGND  
12 V  
LBI  
40  
SYNC  
30  
GND GND PwPD PGND PGND  
V
= 3.3 V  
20  
O
o
T
= 25 C  
A
10  
PFM Mode  
0
0.0001  
0.001  
0.01  
0.1  
1
10  
I
- Output Current- A  
O
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.  
PowerPAD is a trademark 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 © 2005, Texas Instruments Incorporated  
1234567...23

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TPS62112 替代型号

型号 品牌 替代类型 描述 数据表
TPS62143 TI

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