- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384596 > LM20242MHX (NATIONAL SEMICONDUCTOR CORP) 36V, 2A PowerWise㈢ Adjustable Frequency Synchronous Buck Regulator PDF資料下載
參數(shù)資料
| 型號： | LM20242MHX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 36V, 2A PowerWise㈢ Adjustable Frequency Synchronous Buck Regulator |
| 中文描述： | 4.65 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 384K |
| 代理商： | LM20242MHX |
Connection Diagram
30031402
Top View
eTSSOP-20 Package
Ordering Information
Order Number
LM20242MH
LM20242MHE
LM20242MHX
Package Type
eTSSOP-20
NSC Package Drawing
MXA20A
Package Marking
20242MH
Supplied As
73 Units per Rail
250 Units per Tape and Reel
2500 Units per Tape and Reel
Pin Descriptions
Pin(s)
1
Name
SS/TRK
Description
Soft-Start or Tracking control input
Application Information
An internal 5 μA current source charges an external capacitor to set
the soft-start rate. The PWM can Track to an external voltage ramp
with a low impedance source. If left open, an internal 1 ms SS ramp
is activated.
This pin is connected to the inverting input of the internal
transconductance error amplifier. An 800 mV reference is internally
connected to the non-inverting input of the error amplifier.
Open drain output indicating the output voltage is regulating within
tolerance. A pull-up resistor of 10 k
to 100 k
is recommended if this
function is used.
The loop compensation network should be connected between the
COMP pin and the AGND pin.
Nominal operating range: 4.5V to 36V.
The drain terminal of the internal Synchronous Rectifier power
NMOSFET and the source terminal of the internal Control power
NMOSFET.
Internal reference for the power MOSFETs.
Internal reference for the regulator control functions.
An internal diode from VCC to BOOT charges an external capacitor
required from SW to BOOT to power the Control MOSFET gate driver.
VCC tracks VIN up to about 7.2V. Above VIN = 7.2V, VCC is regulated
to approximately 5.5 Volts. A 0.1 μF to 1 μF ceramic decoupling
capacitor is required. The VCC pin is an output only.
An external voltage divider can be used to set the line undervoltage
lockout threshold. If the EN pin is left unconnected, a 2 μA pull-up
current source pulls the EN pin high to enable the regulator.
2
FB
Feedback input to the error amplifier
from the regulated output
3
PGOOD
Power good output signal
4
COMP
Output of the internal error amplifier and
input to the Pulse Width Modulator
Input supply voltage
Switch pin
5,6,15,16
7,8,13,14
VIN
SW
9,10,11
12
17
GND
AGND
BOOT
Ground
Analog ground
Boost input for bootstrap capacitor
18
VCC
Output of the high voltage linear
regulator. The VCC voltage is regulated
to approximately 5.5V.
Enable or UVLO input
19
EN
20
RT
Internal oscillator frequency adjust input Normally biased at 550 mV. An external resistor connected between
RT and AGND sets the internal oscillator frequency.
Exposed pad
Exposed metal pad on the underside of the package with a weak
electrical connection to GND. Connect this pad to the PC board ground
plane in order to improve heat dissipation.
EP
Exposed
Pad
www.national.com
2
L
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM205 | Voltage Regulators |
| LM376 | Voltage Regulators |
| LM2240 | Programmable Timer/Counter |
| LM2240N | Programmable Timer/Counter |
| LM2418T | Triple 30 MHz CRT Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM20242MHX/NOPB | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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 |
| LM2024CS-A | 制造商:CEC Industries 功能描述:LED, RPL, BULB, AMBER, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Amber; Wavelength Typ:590nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:24V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No |
| LM2024CS-B | 制造商:CEC Industries 功能描述:LED, RPL, BULB, BLUE, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Blue; Wavelength Typ:470nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:24V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No |
| LM2024CS-G | 制造商:CEC Industries 功能描述:LED, RPL, BULB, GREEN, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Green; Wavelength Typ:525nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:24V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No |
| LM2024CS-R | 制造商:CEC Industries 功能描述:LED, RPL, BULB, RED, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Red; Wavelength Typ:629nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:24V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。