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參數資料
| 型號： | TPS54519RTER |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 8 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, WQFN-16 |
| 文件頁數： | 3/33頁 |
| 文件大小： | 1269K |
| 代理商： | TPS54519RTER |
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VSENSE
V
O
+
-
TPS54519
R1
R2
0.6 V
0.7 mA
EN
i1
ihys
VIN
+
-
TPS54519
R1
R2
2.9 mA
-
÷
è
-
+
÷
è
ENFALLING
START
STOP
ENRISING
ENFALLING
P
h
ENRISING
V
R1 =
V
I
1
I
V
(
)
ENFALLING
STOP
ENFALLING
P
h
R1
V
R2 =
V
R1 I
I
-
+
SLVSAT3
– SEPTEMBER 2011
Figure 16. Voltage Divider Circuit
ENABLE AND ADJUSTING UNDER-VOLTAGE LOCKOUT
The TPS54519 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 17 to adjust the input voltage UVLO by using
two external resistors. It is recommended to use the enable resistors to set the UVLO falling threshold (VSTOP)
above 2.7 V. The rising threshold (VSTART) should be set to provide enough hysteresis to allow for any input
supply variations. The EN pin has an internal pull-up current source that provides the default condition of the
TPS54519 operating when the EN pin floats. Once the EN pin voltage exceeds 1.25 V, an additional 2.9
μA of
hysteresis is added. When the EN pin is pulled below 1.18 V, the 2.9
μA is removed. This additional current
facilitates input voltage hysteresis.
Figure 17. Adjustable Under Voltage Lock Out
(2)
(3)
spacer
where:
Ih = 2.9 A
IP = 0.7 A
VENRISING = 1.25 V
VENFALLING = 1.18 V
Copyright
2011, Texas Instruments Incorporated
11
Product Folder Link(s): TPS54519
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相關代理商/技術參數 |
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|---|---|
| TPS54519RTET | 功能描述:直流/直流開關調節器 2.95-6VIN,5A SYNC STEP-DOWN CONVERTER RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54521 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 17V Input, 5A Synchronous Step Down SWIFT? Converter |
| TPS54521_1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 17V Input, 5A Synchronous Step Down SWIFT? Converter |
| TPS54521EVM-607 | 功能描述:電源管理IC開發工具 TPS54521 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54521RHL | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 17V Input, 5A Synchronous Step Down SWIFT? Converter |
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