參數(shù)資料
型號： LM27402SQX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 1350 kHz SWITCHING FREQ-MAX, QCC16
封裝： 4 X 4 MM, 0.80 MM HEIGHT, 0.65 MM PITCH, LLP-16
文件頁數(shù)： 27/32頁
文件大?。?/td> 653K
代理商： LM27402SQX
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Unless otherwise specified,
voltages are from the indicated
pins to GND.
VIN, CS+, CS-, SW
-0.3V to +22V
VDD, PGOOD
-0.3V to +6V
EN, SYNC, SS/TRACK, FADJ,
COMP, FB, LG
-0.3V to VDD
CBOOT
-0.3V to +24V
CBOOT to SW
+6V
CS+ to CS-
-2V to +2V
Storage Temperature
-65°C to 150°C
Junction Temperature
150°C
Lead Temperature
(Soldering, 10 sec)
260°C
Minimum ESD Rating (Note 2)
±2kV
Operating Ratings (Note 1)
Input Voltage Range (Note 3)
VIN
+3.0V to +20V
VIN (VDD = VIN)
+3.0V to +5.5V
VDD to GND
+2.2V to +5.5V
SS/TRACK, SYNC, EN
0V to V
VDD
PGOOD
0V to +5.5V
Junction Temperature
-40°C to + 125°C
θ
JA (LLP-16) (Note 4)
40°C/W
θ
JA (eTSSOP-16) (Note 4)
40°C/W
Electrical Characteristics Unless otherwise stated, the following conditions apply: V
IN = 12V. Limits in standard
type are for T
J = 25°C only, limits in bold face type apply over the junction temperature (TJ) 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.
System Parameters
Symbol
Parameter
Conditions
Min
Typ
Max
Units
OPERATIONAL SPECIFICATIONS
I
Q
Quiescent Current
V
FB = 0.6V (not switching)
4.5
6.0
mA
I
QSD
Quiescent Current In Shutdown
V
EN = 0V
25
45
A
UVLO
UVLO
Input Under Voltage Lockout
V
VIN Rising, VVDD Rising
2.7
2.9
2.99
V
UVLO
HYS
UVLO Hysteresis
V
VIN Falling, VVDD Falling
300
mV
REFERENCE
V
FB
Feedback Voltage
0.594
0.600
0.606
V
I
FB
Feedback Pin Bias Current
V
FB = 0.65V
-50
0
50
nA
SWITCHING
F
SW
Switching Frequency
R
FADJ = 4.12 k
950
1150
1350
kHz
F
SW
Switching Frequency
R
FADJ = 20 k
400
500
600
kHz
F
SW
Switching Frequency
R
FADJ = 95.3 k
175
214
265
kHz
D
MAX
Maximum Duty Cycle
F
SW = 300 kHz
93
95
%
T
OFF_MIN
Minimum Off Time
V
FB = 0.5V
125
165
205
ns
VDD SUB-REGULATOR
V
DD
Sub-Regulator Output Voltage
I
DD = 25 mA
4.0
4.5
5.0
V
ERROR AMPLIFIER
B
W-3db
Open Loop Bandwidth
2
MHz
A
VOL
Error Amp DC Gain
50
dB
V
SLEW_RISE
Error Amplifier Rising Slew Rate
V
FB = 0.5V
5
V/s
V
SLEW_FALL
Error Amplifier Falling Slew Rate
V
FB = 0.7V
3
V/s
I
SOURCE
COMP Source Current
V
FB = 0.5V
8
12
mA
I
SINK
COMP Sink Current
V
FB = 0.7V
4
12
mA
V
COMP_MAX
Max COMP Voltage
V
FB = 0.5V
3.1
V
COMP_MIN
Min COMP Voltage
V
FB = 0.7V
0.5
V
www.national.com
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LM27402
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