- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄32308 > LSP3171MSAD (LITE-ON SEMICONDUCTOR CORP) SWITCHING REGULATOR, 470 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | LSP3171MSAD |
| 廠商： | LITE-ON SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 470 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大小： | 330K |
| 代理商： | LSP3171MSAD |
Liteon Semiconductor Corporation
LSP3171
MSOP10L 2A Step Down DC/DC Converter
Rev1.4
1/9
FEATURES
2A Output Current
Up to 95% Efficiency
7V to 20V Input Range
40A Shutdown Supply Current
400KHz Switching Frequency
Adjustable Output Voltage
Cycle-by-Cycle Current Limit Protection
Thermal Shutdown Protection
Frequency Foldback at Short Circuit
Stability with Wide Range of Capacitors,
Including Low ESR Ceramic Capacitors
MSOP-10L Package
TYPICAL APPLICATION
TFT LCD Monitors
Portable DVDs
Car-Powered or Battery-Powered Equipments
Set-Top Boxes
Telecom Power Supplies
DSL and Cable Modems and Routers
Termination Supplies
GENERAL DESCRIPTION
The LSP3171 is a current-mode step-down DC/DC
converter that generates up to 2A of output current at
400KHz switching frequency.
Consuming only 40A in shutdown mode, the
LSP3171 is highly efficient with peak operating
efficiency at 95%. Protection features include
cycle-by-cycle current limit, thermal shutdown, and
frequency foldback at short circuit.
The LSP3171 is available in a MSOP-10L package
and requires very few external devices for operation.
PIN ASSIGNMENT
PIN DESCRIPTION
Name
No.
Description
NC
1
No connect
BS
2
Bootstrap. This capacitor (C5) is needed to driver the power switch’s gate above the supply
voltage. It is connected between the SW and BS pins to from a floating supply across the power
switch driver. The voltage across C5 is about 5V and is supplied by the internal +5V supply when
the SW pin voltage is low.
NC
3
No connect
IN
4
Supply voltage. The LSP3171 operates from a +4.75V to +18V unregulated input C1 is needed to
prevent large voltage spikes from appearing at the input
SW
5
Switch. This connects the inductor to either IN through M1 or to GND through M2
GND
6
Ground. This pin is the voltage reference for the regulated output voltage. For this reason care
must be taken in its layout. This node should be placed outside of the D1 to C1 ground path to
prevent switching current spikes from inducing voltage noise into the part.
FB
7
Feedback. An external resistor divider from the output to GND, tapped to the FB pin, sets the
output voltage. To prevent current limit runaway during a short circuit fault condition the frequency
foldback comparator lowers the oscillator frequency when the FB voltage is below 400mV
COMP
8
Compensation. This node is the output of the transconductance error amplifier and the input to the
current comparator. Frequency compensation is done at this node by connecting a series R-C to
ground. See the compensation section for exact details.
EN
9
Enable/UVLO. A voltage greater than 2.5V enables operation. Leave EN unconnected if unused.
An Under Voltage Lockout (UVLO) function can be implemented by the addition of a resistor
divider from VIN to GND. For complete low current shutdown the EN pin voltage needs to be less
than 2.0V
SS
10
Soft-start. Connect SS to an external capacitor to program the soft-start. If unused, leave it open
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1009CPWG4 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LT1009IPWG4 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 2.5 V, PDSO8 |
| LT140SAB | SPECIALTY ANALOG CIRCUIT, PDSO4 |
| LT230A | SPECIALTY ANALOG CIRCUIT, PDSO4 |
| LT3483AEDC#TRMPBF | 0.46 A SWITCHING REGULATOR, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LSP32-K2-RGBA | 制造商:Dialight 功能描述:LED MODULE 32X K2 RGBA |
| LSP-32K2-RGBW | 制造商:Dialight 功能描述: |
| LSP32-K2-RGBW | 制造商:Dialight 功能描述:LED MODULE 32X K2 RGBW |
| LSP-32K2-WWWW | 制造商:Dialight 功能描述: |
| LSP32-K2-WWWW | 制造商:Dialight 功能描述:LED MODULE 32X K2 WWWW |
發(fā)布緊急采購，3分鐘左右您將得到回復。