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參數(shù)資料
| 型號(hào)： | LM2641-ADJMDC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, UUC |
| 封裝： | DIE |
| 文件頁(yè)數(shù)： | 19/22頁(yè) |
| 文件大小： | 531K |
| 代理商： | LM2641-ADJMDC |
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Electrical Characteristics (Continued)
Typicals and limits appearing in regular type apply for T
J = 25C. Limits appearing in boldface type apply over the entire junc-
tion temperature range for operation, 0 to +125C. Unless otherwise specified under the Parameter or Conditions columns, V
IN
= 10V, and V
Symbol
Parameter
Conditions
Typical
Limit
Units
V
OUT Undervoltage Shutdown
Latch Threshold
70
%
60
%(min)
80
%(max)
V
OUT Overvoltage Shutdown
Latch Threshold
150
%
135
%(min)
165
%(max)
Secondary Feedback
Threshold Voltage
(2NDFB/FPWM)
2.5
V
2.4
V(min)
2.6
V(max)
(2NDFB/FPWM) Pin
Pull-Up Current
V
SFB = 2.4V
V
ON/OFF1 =0V
V
ON/OFF2 =5V
40
80
A(max)
(2NDFB/FPWM) Pin
Input Leakage Current
±0.1
A
Gate Drive
V
BOOT
Bootstrap Voltage (Voltage
from CBOOT1 to SW1 and
from CBOOT2 to SW2)
CBOOT1 and CBOOT2 Source
1A Each
4.5
V
4.3
V(min)
HDRV1 and HDRV2 Sink and
Source Current
0.35
A
LDRV1 and LDRV2 Sink and
Source Current
0.35
A
HDRV1 and HDRV2 High-Side
On-Resistance
V
CBOOT1 =VCBOOT2 = 5V, VSW1 =
V
SW2 =0V
6
HDRV1 and HDRV2 Low-Side
On-Resistance
V
CBOOT1 =VCBOOT2 = 5V, VSW1 =
V
SW2 =0V
4
LDRV1 and LDRV2 High-Side
On-Resistance
V
LIN =5V
8
LDRV1 and LDRV2 Low-Side
On-Resistance
V
LIN =5V
4
Oscillator
F
OSC
Oscillator Frequency
300
kHz
255
kHz(min)
345
kHz(max)
Minimum OFF-Time
V
FB1 =1V, Measured at HDRV1
250
ns
350
ns(max)
Maximum Frequency of
Synchronization
400
kHz(min)
Minimum Width of
Synchronization Pulses
SYNC Pulses are Low-Going
200
ns(min)
Error Amplifier
I
FB1,IFB2
Feedback Input Bias Current
V
FB1 =VFB2 = 1.4V
100
nA
250
nA(max)
I
COMP1,ICOMP2
COMP Output Source Current
V
FB1 =VFB2 = 1V, VCOMP1 =
V
COMP2 =1V
90
A
40
A(min)
I
COMP1,ICOMP2
COMP Output Sink Current
V
FB1 =VFB2 = 1.4V, VCOMP1 =
V
COMP2 = 0.2V
60
A
40
A(min)
Voltage References and Linear Voltage Regulator
LM2641
www.national.com
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2641MTC-ADJ | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2641MTC-ADJ/NOPB | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2641MTCX-ADJ | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2641MTCX-ADJ/NOPB | 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM2642 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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