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TPS626985YFDR

更新时间： 2024-11-15 12:00:35
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29页 1527K
描述
800-mA , 3-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER

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TPS626985YFDR 数据手册

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TPS62692, TPS62693  
TPS62694, TPS62698  
CSP-6  
www.ti.com  
SLVSAZ1 –DECEMBER 2012  
800-mA , 3-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER  
Check for Samples: TPS62692, TPS62693, TPS62694, TPS62698  
1
FEATURES  
DESCRIPTION  
The TPS62693 device is  
synchronous step-down dc-dc converter optimized for  
battery-powered portable applications. Intended for  
low-power applications, the TPS62693 supports up to  
800-mA load current, and allows the use of low cost  
chip inductor and capacitors.  
23  
•
95% Efficiency at 3MHz Operation  
21 μA Quiescent Current  
a
high-frequency  
•
•
•
•
•
•
•
•
•
•
•
3 MHz Regulated Frequency Operation  
Spread Spectrum, PWM Frequency Dithering  
High Duty-Cycle Operation  
±2% Total DC Voltage Accuracy  
Best in Class Load and Line Transient  
Excellent AC Load Regulation  
The device is ideal for mobile phones and similar  
portable applications powered by a single-cell Li-Ion  
battery. Different fixed output voltage versions are  
available in the range from 2.2 V up to 3.3 V.  
Low Ripple Light-Load PFM Mode  
≥40 dB VIN PSRR (1 kHz to 10 kHz)  
Internal Soft Start, 350-μs Start-Up Time  
The TPS62693 operates at a regulated 3-MHz  
switching frequency and enters the power-save mode  
operation at light load currents to maintain high  
efficiency over the entire load current range.  
Integrated Active Power-Down Sequencing  
(Optional)  
The PFM mode extends the battery life by reducing  
the quiescent current to 21 μA (typical) during light  
load operation. For noise-sensitive applications, the  
device can be forced into fixed frequency PWM mode  
by pulling the MODE pin high. This feature, combined  
with high PSRR and AC load regulation performance,  
make this device suitable to replace a linear regulator  
to obtain better power conversion efficiency.  
•
•
Current Overload and Thermal Shutdown  
Protection  
Three Surface-Mount External Components  
Required (One 2012 MLCC Inductor, Two 0402  
Ceramic Capacitors)  
•
Complete Sub 1-mm Component Profile  
Solution  
Total Solution Size <12 mm2 (CSP)  
•
•
Available in a 6-Pin NanoFree™ (CSP)  
APPLICATIONS  
100  
90  
80  
70  
60  
50  
40  
30  
•
•
•
•
Memory Cards  
LDO Replacement  
Cell Phones, Smart-Phones  
WLAN, Bluetooth™ Applications  
V
V
TPS62693  
IN  
3.15 V ... 4.8 V  
OUT  
2.85 V @ 800mA  
L
SW  
VIN  
1.0 mH  
20  
VIN = 3.0V  
VIN = 3.6V  
VIN = 4.2V  
VIN = 3.6V (PWM)  
C
I
FB  
EN  
C
O
2.2 mF  
10  
4.7 mF  
VOUT = 2.85V  
GND  
MODE  
0
0.1  
1
10  
100 1000  
Current (mA)  
G000  
Figure 1. Smallest Solution Size Application  
Figure 2. Efficiency vs. Load Current  
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.  
NanoFree is a trademark of Texas Instruments.  
2
3
Bluetooth is a trademark of Bluetooth SIG.  
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 © 2012, Texas Instruments Incorporated  
1234567...29

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