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參數(shù)資料
| 型號： | TPS54319RTER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PQCC16 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, WQFN-16 |
| 文件頁數(shù)： | 4/36頁 |
| 文件大?。?/td> | 1271K |
| 代理商： | TPS54319RTER |
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VSENSE
V
O
+
–
TPS54319
R1
R2
0.827 V
EN
i 1
i hys
VIN
+
–
TPS54319
R1
R2
1.2 mA
3.4 mA
( )
START
STOP
6
0.944
V
R1 =
3.47 10-
-
W
( )
6
STOP
1.18 R1
R2 =
V
1.18
4.6 10
R1
-
×
W
-
+
×
Tss(mS)
Iss( A)
Css(nF) =
Vref(V)
m
SLVSA83 – JUNE 2010
www.ti.com
Figure 22. Voltage Divider Circuit
ENABLE AND ADJUSTING UNDER-VOLTAGE LOCKOUT
The TPS54319 is disabled when the VIN pin voltage falls below 2.6 V. If an application requires a higher
under-voltage lockout (UVLO), use the EN pin as shown in Figure 23 to adjust the input voltage UVLO by using
two external resistors. The EN pin has an internal pull-up current source that provides the default condition of the
TPS54319 operating when the EN pin floats. Once the EN pin voltage exceeds 1.25 V, an additional 3.4 mA of
hysteresis is added. When the EN pin is pulled below 1.18 V, the 3.4 mA is removed. This additional current
facilitates input voltage hysteresis.
Figure 23. Adjustable Under Voltage Lock Out
(2)
vertical spacer
(3)
SLOW START / TRACKING PIN
The TPS54319 regulates to the lower of the SS/TR pin and the internal reference voltage. A capacitor on the
SS/TR pin to ground implements a slow start time. The TPS54319 has an internal pull-up current source of
2.2mA which charges the external slow start capacitor. Equation 4 calculates the required slow start capacitor
value where Tss is the desired slow start time in ms, Iss is the internal slow start charging current of 2.2 mA, and
Vref is the internal voltage reference of 0.827 V.
vertical spacer
(4)
12
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54319
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54319RTET | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 2.95-6Vin 3A 2MHz Sync Step-Down SWIFT RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54319RTET | 制造商:Texas Instruments 功能描述:SYNCHRONOUS STEP-DOWN SWITCHER WITH INTE 制造商:Texas Instruments 功能描述:IC, SYNC STEP-DOWN DC/DC CONVERTER QFN16 |
| TPS5431DDA | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.5-23V 3A Step Down Swift Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS5431DDAG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.5-23V 3A Step Down Swift Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS5431DDAR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.5V-23V 3A Step- Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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