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參數(shù)資料
| 型號： | LM20144MHX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4A, PowerWise㈢ Adjustable Frequency Synchronous Buck Regulator |
| 中文描述： | 6.6 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 744K |
| 代理商： | LM20144MHX |
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Enable
V
IH_EN
V
EN_HYS
EN Pin turn-on Threshold
V
EN
Rising
1.08
1.18
1.28
V
EN Pin Hysteresis
66
mV
Thermal Shutdown
T
SD
T
SD_HYS
Thermal Resistance
θ
JA
Thermal Shutdown
160
°C
Thermal Shutdown Hysteresis
10
°C
Junction to Ambient
38
°C/W
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
, the junctions-to-ambient thermal resistance,
θ
JA
,
and the ambient temperature, T
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
D_MAX
= (T
J_MAX
– T
A
)/θ
JA
. The
maximum power dissipations of 2.6W is determined using T
A
= 25°C,
θ
JA
= 38°C/W, and T
J_MAX
= 125°C.
Note 3:
The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor to each pin.
Typical Performance Characteristics
(Coilcraft MSS1038), V
IN
= 5V, V
OUT
= 1.2V, R
LOAD
= 1.2
, f
SW
= 1 MHz, T
A
= 25°C for efficiency curves, loop gain plots and
waveforms, and T
J
= 25°C for all others.
Unless otherwise specified: C
IN
= C
OUT
= 100 μF, L = 1.0 μH
Efficiency vs. Load Current (V
IN
= 5V, f
SW
= 1 MHz)
30030631
Efficiency vs. Load Current (V
IN
= 3.3V, f
SW
= 1 MHz)
30030630
Efficiency vs. Load Current (V
IN
= 5V, f
SW
= 500 kHz)
30030649
Efficiency vs. Load Current (V
IN
= 3.3V, f
SW
= 500 kHz)
30030648
www.national.com
4
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM20144MHX/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 安裝風格:SMD/SMT |
| LM20144QMH/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A,PwrWise Adj Freq Sync Buck Reg 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM20144QMHE/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A,PwrWise Adj Freq Sync Buck Reg 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| LM20144QMHX | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM20144/LM20144Q 4A, PowerWise Adjustable Frequency Synchronous Buck Regulator |
| LM20144QMHX/NOPB | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A,PwrWise Adj Freq Sync Buck Reg 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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