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LM25115MT 数据表(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM25115MT
功能描述  Secondary Side Post Regulator Controller
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM25115MT 数据表(HTML) 5 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VBIAS to GND
–0.3V to 32V
VCC to GND
–0.3V to 9V
HS to GND
–1V to 45V
VOUT, CS to GND
– 0.3V to 15V
All other inputs to GND
−0.3V to 7.0V
Storage Temperature Range
–55˚C to +150˚C
Junction Temperature
+150˚C
ESD Rating
HBM (Note 2)
2 kV
Operating Ratings
VBIAS supply voltage
5V to 30V
VCC supply voltage
5V to 7.5V
HS voltage
0V to 42V
HB voltage
VCC + HS
Operating Junction Temperature
–40˚C to +125˚C
Typical Operating Conditions
Parameter
Min
Typ
Max
Units
Supply Voltage, VBIAS
4.5
30
V
Supply Voltage, VCC
4.5
7
V
Supply voltage bypass, CVBIAS
0.1
1
µF
Reference bypass capacitor, CVCC
0.1
1
10
µF
HB-HS bootstrap capacitor
0.047
µF
SYNC Current Range (VCC = 4.5V)
50
150
µA
RAMP Saw Tooth Amplitude
1
1.75
V
VOUT regulation voltage (VBIAS min = 3V + VOUT)
0.75
13.5
V
Electrical Characteristics Unless otherwise specified, T
J = –40˚C to +125˚C, VBIAS = 12V, No Load on
LO or HO.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VBIAS SUPPLY
Ibias
VBIAS Supply Current
F
SYNC = 200kHz
4
mA
VCC LOW DROPOUT BIAS REGULATOR
VccReg
VCC Regulation
VCC open circuit. Outputs not
switching
6.65
7
7.15
V
VCC Current Limit
(Note 4)
40
mA
VCC Under-voltage Lockout Voltage Positive going VCC
4
4.5
V
VCC Under-voltage Hysteresis
0.2
0.25
0.3
V
SOFT-START
SS Source Impedance
43
60
77
k
SS Discharge Impedance
100
ERROR AMPLIFIER and FEEDBACK REFERENCE
VREF
FB Reference Voltage
Measured at FB pin
0.737
0.75
0.763
V
FB Input Bias Current
FB = 2V
0.2
0.5
µA
COMP Source Current
300
µA
Open Loop Voltage Gain
60
dB
GBW
Gain Bandwidth Product
4
MHz
Vio
Input Offset Voltage
-7
0
7
mV
COMP Offset
Threshold for V
HO = high RAMP = CS
=VOUT=0V
2V
RAMP Offset
Threshold for V
HO = high COMP =
1.5V, CS = VOUT = 0V
1.1
V
CURRENT SENSE AMPLIFIER
Current Sense Amplifier Gain
16
V/V
Output DC Offset
1.27
V
Amplifier Bandwidth
500
kHz
www.national.com
5


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