- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385481 > LM3478MM (NATIONAL SEMICONDUCTOR CORP) High Efficiency Low-Side N-Channel Controller for Switching Regulator PDF資料下載
參數(shù)資料
| 型號： | LM3478MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency Low-Side N-Channel Controller for Switching Regulator |
| 中文描述： | 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 4/21頁 |
| 文件大?。?/td> | 624K |
| 代理商： | LM3478MM |
Electrical Characteristics
(Continued)
Specifications in Standard type face are for T
= 25C, and in
bold type face
apply over the full
Operating Temperature
Range
. Unless otherwise specified, V
IN
= 12V, R
FA
= 40k
Symbol
Parameter
Conditions
V
SC
Short-Circuit Current
Limit Sense Voltage
Typical
325
Limit
Units
mV
mV (min)
mV (max)
mV
mV(min)
mV(max)
V
IN
= 5V
235
395
V
SL
Internal Compensation
Ramp Voltage
V
IN
= 5V
92
52
132
V
OVP
Output Over-voltage
Protection (with
respect to feedback
voltage) (Note 8)
Output Over-Voltage
Protection
Hysteresis(Note 8)
Error Ampifier
Transconductance
V
COMP
= 1.4V
50
32/
25
78/
85
mV
mV(min)
mV(max)
V
OVP(HYS)
V
COMP
= 1.4V
60
20
110
mV
mV(min)
mV(max)
μmho
μmho (min)
μmho (max)
V/V
V/V (min)
V/V (max)
μA
μA (min)
μA (max)
μA
μA (min)
μA (max)
V
V(min)
V(max)
V
V(min)
V(max)
msec
Gm
V
COMP
= 1.4V
I
EAO
= 100μA
(Source/Sink)
V
COMP
= 1.4V
I
EAO
= 100μA
(Source/Sink)
Source, V
COMP
= 1.4V,
V
FB
= 0V
800
600/
365
1000/
1265
A
VOL
Error Amplifier Voltage
Gain
38
26
44
I
EAO
Error Amplifier Output
Current (Source/ Sink)
110
80/
50
140/
180
Sink, V
COMP
= 1.4V, V
FB
= 1.4V
140
100/
85
180/
185
V
EAO
Error Amplifier Output
Voltage Swing
Upper Limit
V
FB
= 0V
COMP Pin = Floating
Lower Limit
V
FB
= 1.4V
2.2
1.8
2.4
0.56
0.2
1.0
T
SS
Internal Soft-Start
Delay
Drive Pin Rise Time
V
FB
= 1.2V, V
COMP
=
Floating
Cgs = 3000pf, V
DR
= 0 to
3V
Cgs = 3000pf, V
DR
= 0 to
3V
Output = High
4
T
r
25
ns
T
f
Drive Pin Fall Time
25
ns
VSD
Shutdown threshold
(Note 5)
1.27
1.35
V
V (max)
V
V (min)
μA
Output = Low
0.65
0.35
I
SD
Shutdown Pin Current
V
SD
= 5V
V
SD
= 0V
1
+1
165
10
TSD
T
sh
Thermal Shutdown
Thermal Shutdown
Hysteresis
Thermal Resistance
C
C
θ
JA
MM Package
200
C/W
L
www.national.com
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3478MMX | High Efficiency Low-Side N-Channel Controller for Switching Regulator |
| LM3485 | Hysteretic PFET Buck Controller |
| LM3485MM | Hysteretic PFET Buck Controller |
| LM3485MMX | Hysteretic PFET Buck Controller |
| LM3488 | 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3478MM/E7001794 | 制造商:Texas Instruments 功能描述: |
| LM3478MM/NOPB | 功能描述:DC/DC 開關(guān)控制器 HI EFF LOW-SIDE N CH CONTROLLER RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 安裝風格: 封裝 / 箱體:CPAK |
| LM3478MM/NOPB | 制造商:Texas Instruments 功能描述:Pulse Width Modulation (PWM) Controller |
| LM3478MMX | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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 安裝風格: 封裝 / 箱體:CPAK |
| LM3478MMX/HALF | 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。