- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69510 > TPS5401DGQ (TEXAS INSTRUMENTS INC) SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | TPS5401DGQ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 6/41頁 |
| 文件大小： | 1149K |
| 代理商： | TPS5401DGQ |
第1頁第2頁第3頁第4頁第5頁當(dāng)前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁
4.6
4.8
5
5.2
5.4
5.6
0
0.05
0.10
0.15
0.20
I
– Output Current – A
OUT
V
–
Input
V
oltage
–
V
IN
V
= 5 V
OUT
Start
Stop
V
–
Input
V
oltage
–
V
IN
I
– Output Current – A
OUT
V
= 3.3 V
OUT
V
0.8 V
R1 = R2
0.8 V
-
÷
è
SLVSAB0 – DECEMBER 2010
www.ti.com
DETAILED DESCRIPTION (continued)
voltage and output voltage is greater than 2.1 V, at which point the BOOT UVLO threshold is exceeded, and the
device starts switching again until the desired output voltage is reached. This operating condition persists until
the input voltage and/or the load current increases. It is recommended to adjust the VIN stop voltage greater
than the BOOT UVLO trigger condition at the minimum load of the application using the adjustable VIN UVLO
feature with resistors on the EN pin.
The start and stop voltages for typical 3.3-V and 5-V output applications are shown in Figure 26 and Figure 27.
The voltages are plotted versus load current. The start voltage is defined as the input voltage needed to regulate
the output within 3.5%. The stop voltage is defined as the input voltage at which the output drops by 5% or stops
switching.
During high-duty-cycle conditions, the inductor current ripple increases while the BOOT capacitor is being
recharged, resulting in an increase in ripple voltage on the output. This is due to the recharge time of the boot
capacitor being longer than the typical high-side off time, when switching occurs every cycle.
Figure 26. 3.3-V Start/Stop Voltage
Figure 27. 5-V Start/Stop Voltage
Error Amplifier
The TPS5401 has a transconductance amplifier as the error amplifier. The error amplifier compares the VSENSE
voltage to the lower of the SS/TR pin voltage or the internal 0.8-V voltage reference. The transconductance (gm)
of the error amplifier is 97 mA/V during normal operation. During the slow-start operation, the transconductance is
a fraction of the normal operating gm. When the voltage of the VSENSE pin is below 0.8 V and the device is
regulating using the SS/TR voltage, the gm is 26 mA/V.
The frequency compensation components (series resistor and capacitor) are connected between the COMP pin
and ground.
Voltage Reference
The voltage reference system produces a precise ±3.5% voltage reference over temperature by scaling the
output of a temperature-stable bandgap circuit.
Adjusting the Output Voltage
The output voltage is set with a resistor divider from the output node to the VSENSE pin. It is recommended to
use 1% tolerance or better divider resistors. Start with 10 k
for the R2 resistor and use Equation 1 to calculate
R1. To improve efficiency at light loads, consider using larger-value resistors. If the values are too high, the
regulator becomes more susceptible to noise, and voltage errors from the VSENSE input current become
noticeable.
(1)
14
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS5401
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS54040QDRCRQ1 | SWITCHING REGULATOR, PDSO10 |
| TPS54040QDGQRQ1 | SWITCHING REGULATOR, PDSO10 |
| TPS54060DRCT | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54060DGQR | 0.94 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54060DRCR | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS5401DGQR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5V-42Vin,0.5A Step Down SWIFT RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS5401DGQT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5V-42Vin,0.5A Step Down SWIFT RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS5401EVM-708 | 功能描述:電源管理IC開發(fā)工具 Eval Mod for TPS5401 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS5402 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3.5-V TO 28-V INPUT VOLTAGE, 1.7-A OUTPUT CURRENT, NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET |
| TPS54020 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 17V Input, 10A Synchronous Step-Down SWIFTa?￠ Converter With Full Feature Set |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。