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參數(shù)資料
| 型號： | LM20242MHE |
| 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)： | 4/20頁 |
| 文件大?。?/td> | 384K |
| 代理商： | LM20242MHE |
Symbol
Current Limit
I
LIM
T
ILIM
Enable
V
EN(RISING)
V
EN(HYS)
I
EN
Thermal Shutdown
T
SD
T
SD(HYS)
Thermal Resistance
θ
JC
θ
JA
Parameter
Conditions
Min
Typ
Max
Units
Cycle By Cycle Current Limit
3.1
3.7
4.65
A
Cycle By Cycle Current Limit Delay
150
ns
EN Pin Rising Threshold
1.2
1.25
1.3
V
EN Pin Hysteresis
50
mV
EN Source Current
V
EN
= 0V, V
VIN
= 12V
2
μA
Thermal Shutdown
170
°C
Thermal Shutdown Hysteresis
20
°C
Junction to Case
5.6
°C/W
Junction to Ambient
0 LFM airflow
30
°C/W
Note 1:
Absolute Maximum Ratings indicate limits beyond witch 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 human body model is a 100 pF capacitor discharged through a 1.5 k
resistor to each pin.
Note 3:
Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Typical Performance Characteristics
Unless otherwise specified: T
J
= 25°C, V
VIN
= 12V
Efficiency vs. Load Current
f
SW
= 350 kHz
30031403
Efficiency vs. Load Current
f
SW
= 500 kHz
30031404
www.national.com
4
L
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