參數(shù)資料
型號： LM2577TADJFLOWLB03
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 6 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, PZFM5
封裝： PLASTIC, TO-220, 5 PIN
文件頁數(shù)： 23/27頁
文件大小： 889K
代理商： LM2577TADJFLOWLB03
Electrical Characteristics — LM1577-ADJ, LM2577-ADJ
Specifications with standard type face are for T
J = 25C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V, VFEEDBACK = VREF, and ISWITCH = 0.
LM1577-ADJ LM2577-ADJ
Units
Symbol
Parameter
Conditions
Typical
Limit
(Limits)
(Notes 3, 4)
(Note 5)
SYSTEM PARAMETERS Circuit of
Figure 3 (Note 6)
V
OUT
Output Voltage
V
IN = 5V to 10V
12.0
V
I
LOAD = 100 mA to 800 mA
11.60/11.40
V(min)
(Note 3)
12.40/12.60
V(max)
V
OUT/
Line Regulation
V
IN = 3.5V to 10V
20
mV
V
IN
I
LOAD = 300 mA
50/100
mV(max)
V
OUT/
Load Regulation
V
IN = 5V
20
mV
I
LOAD
I
LOAD = 100 mA to 800 mA
50/100
mV(max)
η
Efficiency
V
IN = 5V, ILOAD = 800 mA
80
%
DEVICE PARAMETERS
I
S
Input Supply Current
V
FEEDBACK = 1.5V (Switch Off)
7.5
mA
10.0/14.0
mA(max)
I
SWITCH = 2.0A
25
mA
V
COMP = 2.0V (Max Duty Cycle)
50/85
mA(max)
V
UV
Input Supply
I
SWITCH = 100 mA
2.90
V
Undervoltage Lockout
2.70/2.65
V(min)
3.10/3.15
V(max)
f
O
Oscillator Frequency
Measured at Switch Pin
52
kHz
I
SWITCH = 100 mA
48/42
kHz(min)
56/62
kHz(max)
V
REF
Reference
Measured at Feedback Pin
V
Voltage
V
IN = 3.5V to 40V
1.230
1.214/1.206
V(min)
V
COMP = 1.0V
1.246/1.254
V(max)
V
REF/
Reference Voltage
V
IN = 3.5V to 40V
0.5
mV
V
IN
Line Regulation
I
B
Error Amp
V
COMP = 1.0V
100
nA
Input Bias Current
300/800
nA(max)
G
M
Error Amp
I
COMP = 30 A to +30 A
3700
mho
Transconductance
V
COMP = 1.0V
2400/1600
mho(min)
4800/5800
mho(max)
A
VOL
Error Amp
V
COMP = 1.1V to 1.9V
800
V/V
Voltage Gain
R
COMP = 1.0 M (Note 7)
500/250
V/V(min)
Error Amplifier
Upper Limit
2.4
V
Output Swing
V
FEEDBACK = 1.0V
2.2/2.0
V(min)
Lower Limit
0.3
V
FEEDBACK = 1.5V
0.40/0.55
V(max)
Error Amp
V
FEEDBACK = 1.0V to 1.5V
±200
A
Output Current
V
COMP = 1.0V
±130/±90
A(min)
±300/±400
A(max)
I
SS
Soft Start Current
V
FEEDBACK = 1.0V
5.0
A
V
COMP = 0V
2.5/1.5
A(min)
7.5/9.5
A(max)
D
Maximum Duty Cycle
V
COMP = 1.5V
95
%
I
SWITCH = 100 mA
93/90
%(min)
I
SWITCH/
Switch
12.5
A/V
V
COMP
Transconductance
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2577T-ADJFLOWLB03 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller
LM2578AM 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
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LM2578AM/NOPB 制造商:Texas Instruments 功能描述:DC/DC Converter IC
LM2578AMX 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
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