參數(shù)資料
型號(hào)： LM5046SQ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 540 kHz SWITCHING FREQ-MAX, QCC28
封裝： 5 X 5 MM, LLP-28
文件頁數(shù)： 29/32頁
文件大?。?/td> 888K
代理商： LM5046SQ
Absolute Maximum Ratings (Note 1)
VIN to GND
-0.3V to 105V
HS to GND
-5V to 105V
BST1/BST2 to GND
-0.3V to 116V
BST1/BST2 to HS1/HS2
-0.3V to 16V
HO1/HO2 to HS1/HS2
-0.3V to BST1/
BST2+0.3V
LO1/LO2/SR1/SR2
-0.3V to VCC+0.3V
V
CC to GND
-0.3V to 16V
REF,SSOFF,RT,OVP,UVLO to GND
-0.3V to 7V
RAMP
-0.3V to 7V
COMP
-0.3V
COMP Input Current
+10mA
All other inputs to GND
-0.3 to REF+0.3V
ESD Rating HBM
2 kV
Storage Temperature Range
-55°C to 150°C
Junction Temperature
150°C
Operating Ratings (Note 1)
VIN Voltage
14V to 100V
External Voltage Applied to VCC
10V to 14V
Junction Temperature
-40°C to +125°C
SLOPE
-0.3V to 2V
Electrical Characteristics Limits in standard typeface are for T
J = 25°C only; limits in boldface type apply the
junction temperature range of -40°C to +125°C. Unless otherwise specified, the following conditions apply: VIN = 48V, RT =
25k
, RD1=RD2=20k. No load on HO1, HO2, LO1, LO2, SR1, SR2, COMP=0V, UVLO=2.5V, OVP=0V, SSOFF=0V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Startup Regulator (VCC pin)
V
CC1
VCC voltage
I
CC= 10mA (SSSR<1V)
9.3
9.6
9.9
V
CC2
VCC voltage
I
CC= 10mA (SSSR>1V)
7.5
7.8
8.1
V
I
CC(Lim)
VCC current limit
V
CC= 6V
52
70
mA
I
CC(ext)
VCC supply current
Supply current into VCC from an externally
applied source. V
CC = 10V
4.6
mA
VCC load regulation
I
CC from 0 to 50 mA
35
mV
V
CC(UV)
VCC under-voltage threshold
Positive going VCC
V
CC1–
0.2
V
CC1–
0.1
V
VCC under-voltage threshold
Negative going VCC
5.9
6.3
6.7
V
I
IN
VIN operating current
4
mA
VIN shutdown current
V
IN=20V, VUVLO=0V
300
520
A
V
VIN=100V, VUVLO=0V
350
550
A
VIN start-up regulator leakage
V
CC=10V
160
A
Voltage Reference Regulator (REF pin)
V
REF
REF Voltage
I
REF = 0mA
4.85
5
5.15
V
REF voltage regulation
I
REF = 0 to 10mA
25
50
mV
I
REF(Lim)
REF current limit
V
REF = 4.5V
15
20
mA
V
REFUV
V
REF under-voltage threshold
Positive going V
REF
4.3
4.5
4.7
V
Hysteresis
0.25
V
Under-Voltage Lock Out and shutdown (UVLO pin)
V
UVLO
Under-voltage threshold
1.18
1.25
1.32
V
I
UVLO
Hysteresis current
UVLO pin sinking current when
V
UVLO<1.25V
16
20
24
A
Under-voltage standby enable
threshold
UVLO voltage rising
0.32
0.4
0.48
V
Hysteresis
0.05
V
OVP
OVP shutdown threshold
OVP rising
1.18
1.25
1.32
V
OVP hysteresis current
OVP sources current when OVP>1.25V
16
20
24
A
Soft-Start (SS Pin)
I
SS
SS charge current
V
SS = 0V
16
20
24
A
SS threshold for SSSR charge
current enable
I
COMP<800A
1.93
2.0
2.20
V
SS output low voltage
Sinking 100A
40
mV
SS threshold to disable switching
200
mV
www.national.com
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LM5046
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