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TPS826745

更新时间： 2024-11-04 12:00:35
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德州仪器 - TI 转换器功效
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27页 1019K
描述
600-mA, HIGH-EFFICIENCY MicroSiP STEP-DOWN CONVERTER (PROFILE <1.0mm)

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TPS826745 数据手册

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TPS82670, TPS82671, TPS82672, TPS82673, TPS82674  
TPS82675, TPS82676, TPS82677, TPS826711, TPS826745, TPS826765  
www.ti.com  
SLVSAI0F –OCTOBER 2010–REVISED NOVEMBER 2012  
600-mA, HIGH-EFFICIENCY MicroSiP™ STEP-DOWN CONVERTER (PROFILE <1.0mm)  
Check for  
Samples: TPS82670, TPS82671, TPS82672, TPS82673, TPS82674, TPS82675, TPS82676, TPS82677, TPS826711, TPS826745,  
TPS826765  
1
FEATURES  
DESCRIPTION  
23  
•
90% Efficiency at 5.5MHz Operation  
17μA Quiescent Current  
The TPS8267x device is a complete 600mA, DC/DC  
step-down power supply intended for low-power  
applications. Included in the package are the  
switching regulator, inductor and input/output  
capacitors. No additional components are required to  
finish the design.  
•
•
•
•
•
•
•
•
•
•
•
Wide VIN Range From 2.3V to 4.8V  
5.5MHz Regulated Frequency Operation  
Spread Spectrum, PWM Frequency Dithering  
Best in Class Load and Line Transient  
±2% Total DC Voltage Accuracy  
The TPS8267x is based on  
synchronous step-down dc-dc converter optimized for  
a high-frequency  
battery-powered  
portable  
applications.  
The  
Automatic PFM/PWM Mode Switching  
Low Ripple Light-Load PFM Mode  
≥35dB VIN PSRR (1kHz to 10kHz)  
Internal Soft Start, 120-µs Start-Up Time  
MicroSiPTM DC/DC converter operates at a regulated  
5.5-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 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.  
•
Current Overload and Thermal Shutdown  
Protection  
•
•
Sub 1-mm Profile Solution  
Total Solution Size <6.7 mm2  
APPLICATIONS  
•
•
Cell Phones, Smart-Phones  
The TPS8267x is packaged in a compact (2.3mm x  
2.9mm) and low profile (1.0mm) BGA package  
suitable for automated assembly by standard surface  
mount equipment.  
Digital TV, WLAN, GPS and Bluetooth™  
Applications  
•
POL Applications  
250  
225  
200  
100  
90  
VI = 3.6 V,  
VO = 1.8 V  
80  
Efficiency  
PFM/PWM Operation  
175  
150  
70  
60  
TPS82671SIP  
DC/DC Converter  
L
V
V
125  
100  
50  
40  
30  
20  
10  
0
IN  
2.3 V .. 4.8 V  
OUT  
1.8 V @ 600mA  
SW  
VIN  
CO  
CI  
FB  
GND  
EN  
75  
50  
25  
Power Loss  
PFM/PWM Operation  
MODE  
SELECTION  
ENABLE  
MODE  
GND  
0
0.1  
1
10  
100  
1000  
Figure 1. Typical Application  
I
- Load Current - mA  
O
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.  
2
3
MicroSiP 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.  
Copyright © 2010–2012, Texas Instruments Incorporated  
 
 
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 		The TPS82671 and TPS82675 devices are series of high-frequency, synchronous, step-down dc-
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 		600-mA, HIGH-EFFICIENCY MicroSiP STEP-DOWN CONVERTER (PROFILE <1.0mm)
TPS82675SIPT TI

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 		600-mA, HIGH-EFFICIENCY MicroSiP STEP-DOWN CONVERTER (PROFILE <1.0mm)

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