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TPS62679 PDF预览

TPS62679

更新时间: 2024-10-02 08:38:43
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德州仪器 - TI 转换器功效
页数 文件大小 规格书
34页 1161K
描述
500-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT

TPS62679 数据手册

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CSP-6  
TPS62671, TPS62674, TPS62675, TPS62679  
www.ti.com  
SLVS952B APRIL 2010REVISED JANUARY 2011  
500-mA, 6-MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER  
IN LOW PROFILE CHIP SCALE PACKAGING (HEIGHT < 0.4mm)  
Check for Samples: TPS62671, TPS62674, TPS62675, TPS62679  
1
FEATURES  
APPLICATIONS  
23  
92% Efficiency at 6MHz Operation  
Cell Phones, Smart-Phones  
Camera Module Embedded Power  
Digital TV, WLAN, GPS and Bluetooth  
17μA Quiescent Current  
Wide VIN Range From 2.3V to 4.8V  
6MHz Regulated Frequency Operation  
Spread Spectrum, PWM Frequency Dithering  
Best in Class Load and Line Transient  
±2% Total DC Voltage Accuracy  
Low Ripple Light-Load PFM Mode  
35dB VIN PSRR (1kHz to 10kHz)  
Simple Logic Enable Inputs  
Applications  
DC/DC Micro Modules  
DESCRIPTION  
The TPS6267x device is  
a
high-frequency  
synchronous step-down dc-dc converter optimized for  
battery-powered portable applications. Intended for  
low-power applications, the TPS6267x supports up to  
500-mA load current, and allows the use of low cost  
chip inductor and capacitors.  
Supports External Clock Presence Detect  
Enable Input  
Three Surface-Mount External Components  
Required (One 0603 MLCC Inductor, Two 0402  
Ceramic Capacitors)  
With a wide input voltage range of 2.3V to 4.8V, the  
device supports applications powered by Li-Ion  
batteries with extended voltage range. Different fixed  
voltage output versions are available from 1.0V to  
2.3V.  
Complete Sub 0.33-mm Component Profile  
Solution  
Total Solution Size <10 mm2  
The TPS6267x operates at a regulated 6-MHz  
switching frequency and enters the power-save mode  
operation at light load currents to maintain high  
efficiency over the entire load current range.  
Available in a 6-Pin NanoFree(CSP)  
Ultra-Thin Packaging, 0,4mm Max. Height  
The PFM mode extends the battery life by reducing  
the quiescent current to 17μA (typ) during light load  
operation. For noise-sensitive applications, the device  
has PWM spread spectrum capability providing a  
lower noise regulated output, as well as low noise at  
the input. These features, combined with high PSRR  
and AC load regulation performance, make this  
device suitable to replace a linear regulator to obtain  
better power conversion efficiency.  
150  
100  
V = 3.6 V,  
I
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
135  
120  
105  
90  
V
= 1.8 V  
O
Efficiency  
PFM/PWM Operation  
75  
V
V
OUT  
1.8 V @ 500mA  
TPS62671  
VIN  
BAT  
2.3 V .. 4.8 V  
L
60  
SW  
0.47 mH  
45  
Power Loss  
PFM/PWM Operation  
30  
C
I
FB  
EN  
C
O
2.2 mF  
15  
0
4.7 mF  
MODE  
GND  
0.1  
1
10  
- Load Current - mA  
100  
1000  
I
O
Figure 1. Efficiency vs. Load Current  
Figure 2. Smallest Solution Size Application  
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
3
NanoFree is a trademark of Texas Instruments.  
Bluetooth is a trademark of Bluetooth SIG, Inc.  
UNLESS OTHERWISE NOTED this document contains  
PRODUCTION DATA information current as of publication date.  
Products conform to specifications per the terms of Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
© 20102011, Texas Instruments Incorporated  

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