參數(shù)資料
型號： LM20154
廠商： National Semiconductor Corporation
英文描述： 4A, 1MHz PowerWise㈢ Synchronous Buck Regulator with SYNCOUT
中文描述： 第4A，半導(dǎo)體PowerWise㈢1MHz的同步降壓穩(wěn)壓器與SYNCOUT
文件頁數(shù)： 3/22頁
文件大?。?/td> 631K
代理商： LM20154
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, SYNCOUT
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 4A
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
OSC
Oscillator Frequency
T
OFF_TIME
Minimum Off Time
T
ON_TIME
Minimum On Time
T
CL_BLANK
Current Sense Blanking Time
F
SYNCOUT
SYNCOUT Frequency
P
SYNCOUT
SYNCOUT Phase Shift
I
OLSYNC
SYNCOUT Low Sink Current
I
OHSYNC
SYNCOUT High Leakage Current
Error Amplifier and Modulator
I
FB
Feedback pin bias current
I
COMP_SRC
COMP Output Source Current
I
COMP_SNK
COMP Output Sink Current
g
m
Error Amplifier Transconductance
A
VOL
Error Amplifier Voltage Gain
Power Good
V
OVP
Over Voltage Protection Rising Threshold
V
OVP_HYS
Over Voltage Protection Hysteresis
V
PGTH
PGOOD Rising Threshold
V
PGHYS
PGOOD Falling Hysteresis
T
PGOOD
PGOOD deglitch time
I
OL
PGOOD Low Sink Current
I
OH
PGOOD High Leakage Current
Enable
-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
5.4
6.0
6.6
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
850
1000
1150
kHz
85
ns
100
ns
After Rising V
SW
80
ns
850
1000
1150
kHz
°
mA
Relative to High-Side Turn-On
180
V
SYNCOUT
= 0.8V
V
SYNCOUT
= 5V
1.3
1.8
2.4
150
10
nA
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
2000
V/V
With respect to V
FB
105
108
111
3
96
3
%
2
%
With respect to V
FB
92
94
%
2
%
16
μs
V
PGOOD
= 0.4V
V
PGOOD
= 5V
0.6
1
mA
5
100
nA
3
www.national.com
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