參數(shù)資料
型號(hào)： LM20145
廠商： National Semiconductor Corporation
英文描述： 5A, PowerWise㈢ Adjustable Frequency Synchronous Buck Regulator
中文描述： 第5A，頻率可調(diào)的PowerWise㈢同步降壓穩(wěn)壓器
文件頁(yè)數(shù)： 3/22頁(yè)
文件大?。?/td> 601K
代理商： LM20145
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltages from the indicated pins to GND
AVIN, PVIN, EN, PGOOD,
SS/TRK, COMP, FB, RT
Storage Temperature
Junction Temperature
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only, limits in bold face type apply over the junction temperature (T
J
) range of -40°C to
+125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the
most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only.
Symbol
Parameter
Conditions
V
FB
Feedback pin voltage
V
IN
= 2.95V to 5.5V
Δ
V
OUT
/Δ
I
OUT
Load Regulation
I
OUT
= 100 mA to 5A
I
CL
Switch Current Limit Threshold
V
IN
= 3.3V
R
DS_ON
High-Side Switch On Resistance
I
SW
= 3.5A
R
DS_ON
Low-Side Switch On Resistance
I
SW
= 3.5A
I
Q
Operating Quiescent Current
Non-switching, V
FB
= V
COMP
I
SD
Shutdown Quiescent current
V
EN
= 0V
V
UVLO
VIN Under Voltage Lockout
Rising V
IN
V
UVLO_HYS
VIN Under Voltage Lockout Hysteresis
Falling V
IN
V
VCC
VCC Voltage
I
VCC
= 0 μA
I
SS
Soft-Start Pin Source Current
V
SS/TRK
= 0V
V
TRACK
SS/TRK Accuracy, V
SS
- V
FB
V
SS/TRK
= 0.4V
Oscillator
F
OSCH
Oscillator Frequency
F
OSCL
Oscillator Frequency
T
OFF_TIME
Minimum Off Time
T
ON_TIME
Minimum On Time
T
CL_BLANK
Current Sense Blanking Time
Error Amplifier and Modulator
I
FB
Feedback pin bias current
I
COMP_SRC
COMP Output Source Current
I
COMP_SNK
COMP Output Sink Current
Gm
Error Amplifier Transconductance
-0.3V to +6V
-65°C to 150°C
150°C
Power Dissipation (Note 2)
Lead Temperature
(Soldering, 10 sec)
Minimum ESD Rating (Note
3)
2.6W
260°C
±2kV
Operating Ratings
PVIN, AVIN to GND
Junction Temperature
2.95V to 5.5V
40°C to + 125°C
Unless otherwise stated, the following conditions apply: AVIN = PVIN = VIN = 5V.
Min
0.788
Typ
0.8
Max
0.812
Unit
V
0.08
%/A
6.7
7.4
8.1
55
A
36
m
m
mA
32
52
3.5
6
90
180
2.95
100
2.95
7
15
μA
2.45
2.7
V
45
mV
2.45
2
-10
2.7
V
4.5
μA
3
mV
R
T
= 49.9 k
R
T
= 249 k
675
750
825
kHz
225
260
290
kHz
85
ns
100
ns
After Rising V
SW
80
ns
V
FB
= 0.8V
V
FB
= V
COMP
= 0.6V
V
FB
= 1.0V, V
COMP
= 0.6V
I
COMP
= ± 50 μA
1
100
nA
80
80
450
100
μA
100
μA
510
600
μmho
A
VOL
Error Amplifier Voltage Gain
2000
V/V
Power Good
V
OVP
V
OVP_HYS
V
PGTH
V
PGHYS
T
PGOOD
Over Voltage Protection Rising Threshold
With respect to V
FB
105
108
111
3
96
3
%
Over Voltage Protection Hysteresis
2
%
PGOOD Rising Threshold
With respect to V
FB
92
94
%
PGOOD Falling Hysteresis
2
%
PGOOD deglitch time
16
μs
I
OL
I
OH
PGOOD Low Sink Current
V
PGOOD
= 0.4V
V
PGOOD
= 5V
0.6
1
mA
PGOOD High Leakage Current
5
100
nA
3
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM20145_08 制造商:NSC 制造商全稱:National Semiconductor 功能描述:5A, PowerWise㈢ Adjustable Frequency Synchronous Buck Regulator
LM20145CS-A 制造商:CEC Industries 功能描述:LED, RPL, BULB, AMBER, T-6, E12, Lamp Base Type:Candelabra Screw, LED Color:Ambe
LM20145CS-B 制造商:CEC Industries 功能描述:LED, RPL, BULB, BLUE, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Blue; Wavelength Typ:470nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:145V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No
LM20145CS-G 制造商:CEC Industries 功能描述:LED, RPL, BULB, GREEN, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Green; Wavelength Typ:525nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:145V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No
LM20145CS-R 制造商:CEC Industries 功能描述:LED, RPL, BULB, RED, T-6, E12; Lamp Base Type:Candelabra Screw; LED Color:Red; Wavelength Typ:629nm; Power Rating:720mW; Bulb Size:T-6; Supply Voltage:145V; Current Rating:30mA; Average Bulb Life:100000h; Beam Divergence:360 ;RoHS Compliant: No
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