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LM2655 датащи(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
номер детали LM2655
подробное описание детали  2.5A High Efficiency Synchronous Switching Regulator
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2655 датащи(HTML) 5 Page - National Semiconductor (TI)

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All Output Voltage Versions Electrical Characteristics
Specifications with standard typeface are for T
J = 25˚C, and those in boldface type apply over full Operating Temperature
Range.V
IN = 10V unless otherwise specified.
Symbol
Parameter
Conditions
Typical
(Note 6)
Limit
(Note 5)
Units
I
Q
Quiescent Current
Shutdown Pin Floating (Device
On)
Device Not Switching
1.7
3
mA
mA(max)
I
QSD
Quiescent Current in
Shutdown Mode
Shutdown Pin Pulled Low
7
12/20
µA
µA(max)
R
DS(ON)
Switch ON Resistance
I
SWITCH = 1.5A
33
80
m
m
Ω(max)
R
SW(ON)
Switch On Resistance
(MOSFET ON Resistance +
Bonding Wire Resistance)
I
SWITCH = 1.5A
72
m
I
L
Switch Leakage Current
5
nA
V
BOOT
Bootstrap Regulator Voltage
I
BOOT =1mA
C
BOOT=tbd
6.7
6.4
7.0
V
V(min)
V(max)
G
M
Error Amplifier
Transconductance
1250
µmho
A
V
Error Amplifier Voltage Gain
100
I
EA_SOURCE
Error Amplifier Source
Current
V
IN = 4V, VFB = .9*VOUT,VCOMP
=2V
40
32/10
µA
µA(min)
I
EA_SINK
Error Amplifier Sink Current
V
IN = 4V, VFB = 1.1*VOUT,VCOMP
=2V
80
53/30
µA
µA(min)
V
EAH
Error Amplifier Output Swing
Upper Limit
V
IN = 4V, VFB = .9*VOUT,VCOMP
=2V
2.70
2.50/2.40
V
V(min)
V
EAL
Error Amplifier Output Swing
Lower Limit
V
IN = 4V, VFB = .9*VOUT,VCOMP
=2V
1.25
1.35/1.50
V
V(max)
F
OSC
Oscillator Frequency
Measured at Switch Pin
V
IN =4V
300
280/255
330/345
kHz
kHz(min)
kHz(max)
D
MAX
Maximum Duty Cycle
V
IN =4V
95
92
%
%(min)
I
SS
Soft-Start Current
Voltage at the SS Pin = 1.4V
11
14
µA
µA(max)
V
OUTUV
V
OUT Undervoltage Lockout
Threshold Voltage
81
76
84
%V
OUT
%V
OUT(min)
%V
OUT(max)
Hysteresis for V
OUTUV
5%V
OUT
V
OUTOV
V
OUT Overvoltage Lockout
Threshold Voltage
108
106
114
%V
OUT
%V
OUT(min)
%V
OUT(max)
Hysteresis for V
OUTOV
5%V
OUT
I
LDELAY__
SOURCE
LDELAY Pin Source Current
5
µA
I
SHUTDOWN
Shutdown Pin Current
Shutdown Pin Pulled Low
2.2
3.7/4.0
µA
µA(max)
V
SHUTDOWN
Shutdown Pin Threshold
Voltage
Rising Edge
0.6
0.25
0.9
V
V(min)
V(max)
T
SD
Thermal Shutdown
Temperature
165
˚C
www.national.com
5


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