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參數(shù)資料
| 型號： | LM3477MM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Efficiency High-Side N-Channel Controller for Switching Regulator |
| 中文描述： | 1 A SWITCHING CONTROLLER, 575 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 815K |
| 代理商： | LM3477MM |
Electrical Characteristics
(Note 4)
(Continued)
Specifications in Standard type face are for T
J
= 25C, and in
bold type face
apply over the full
Operating Temperature
Range
. Unless otherwise specified, V
IN
= 12V.
Symbol
Parameter
Conditions
V
CL(O)
Current Limit Voltage at 0% Duty
Cycle
Typical
155
Limit
Units
mV
mV (min)
mV (max)
mV
mV (min)
mV (max)
mV
mV (min)
mV (max)
mV
mV (min)
mV (max)
mV
mV (min)
mV (max)
mV
mV (min)
mV (max)
mV
LM3477
130/
125
185/
190
LM3477A
165
140/
135
195/
200
V
CL(100)
Current Limit Voltage at 100%
Duty Cycle
LM3477
74
50/
43
98/
98
LM3477A
65
41/
25
89/
98
V
SC
Short-Circuit Current Limit Sense
Voltage
V
IN
= 5V, LM3477
350
270
420
V
IN
= 5V, LM3477A
310
260
380
V
SL
Internal Compensation Ramp
Voltage Height
V
IN
= 5V, LM3477
V
IN
= 5V, LM3477A
V
COMP
= 1.4V
83
103
50
V
OVP
Output Over-voltage Protection
(with respect to feedback
voltage) (Note 7)
Output Over-Voltage Protection
Hysteresis(Note 7)
32/
25
78/
85
mV
mV(min)
mV(max)
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
V
OVP(HYS)
V
COMP
= 1.4V
60
20
110
Gm
Error Amplifier
Transconductance
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
750
600/
365
1000/
1265
A
VOL
Error Amplifier Voltage Gain
38
30
42
I
EAO
Error Amplifier Output Current
(Source/ Sink)
100
75/
50
130/
160
Sink, V
COMP
= 1.4V, V
FB
= 1.4V
140
110/
95
170/
180
V
EAO
Error Amplifier Output Voltage
Swing
Upper Limit
V
FB
= 0V
COMP Pin = Floating
Lower Limit
V
FB
= 1.4V
2.2
2.0
2.35
0.75
0.5
0.95
T
SS
Internal Soft-Start Delay
V
FB
= 1.2V, V
COMP
=
Floating
C
GS
= 3000pF, V
DR
= 0
to 3V
C
GS
= 3000pF, V
DR
= 0
to 3V
5
T
r
Drive Pin Rise Time
25
ns
T
f
Drive Pin Fall Time
25
ns
L
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|---|---|
| LM3477MM | 制造商:Texas Instruments 功能描述:SWITCH CONTROLLER SMD 3477 MSOP8 |
| LM3477MM/NOPB | 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(fēng)格: 封裝 / 箱體:CPAK |
| LM3477MMX | 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(fēng)格: 封裝 / 箱體:CPAK |
| LM3477MMX/NOPB | 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(fēng)格: 封裝 / 箱體:CPAK |
| LM3478 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulator |
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