参数资料
型号: TPS2501DRCT
厂商: TEXAS INSTRUMENTS INC
元件分类: 稳压器
英文描述: 6 A SWITCHING REGULATOR, 1075 kHz SWITCHING FREQ-MAX, PDSO10
封装: 3 X 3 MM, 0.90 MM HEIGHT, PLASTIC, SON-10
文件页数: 16/41页
文件大小: 1641K
代理商: TPS2501DRCT
+
S001
www.ti.com
SLVS886C – OCTOBER 2008 – REVISED AUGUST 2010
APPLICATION INFORMATION
Step-by-Step Design Procedure
The following design procedure provides an example for selecting component values for the TPS2500.
The following design parameters are needed as inputs to the design process.
Input voltage range
Output voltage on AUX
Input ripple voltage
Output ripple voltage on AUX
Output current rating of AUX rail
Output current rating of USB rail
Nominal efficiency target
Operating frequency
A power inductor, input and output filter capacitors, and current-limit threshold resistor are the only external
components required to complete the TPS2500 boost-converter design. The input ripple voltage, AUX ripple
voltage, and total output current affect the selection of these components.
This design example assumes the following input specifications.
PARAMETER
EXAMPLE VALUE
Input voltage range (VIN)
2.7 V to 4.2 V
AUX voltage (VAUX)
5.1 V (internally fixed)
Input ripple voltage (
ΔVIN)
15 mV
AUX ripple voltage (
ΔVAUX)
50 mV
AUX current (IAUX )
0.5 A
USB current (IUSB )
0.5 A
Total current (ITOTAL = IAUX + IUSB)
1 A
Efficiency target, nominal
90%
Switching frequency (f)
1 MHz
Figure 22. Reference Schematic
Switching Frequency
The switching frequency of the TPS2500 is internally fixed at 1 MHz.
Copyright 2008–2010, Texas Instruments Incorporated
23
Product Folder Link(s): TPS2500 TPS2501
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