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LM3100MH データシート(PDF) 4 Page - Texas Instruments

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部品番号 LM3100MH
部品情報  SIMPLE SWITCHER짰 Synchronous 1MHz 1.5A Step-Down Voltage Regulator
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM3100MH データシート(HTML) 4 Page - Texas Instruments

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LM3100
SNVS421F – JANUARY 2006 – REVISED DECEMBER 2009
www.ti.com
Electrical Characteristics
Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (TJ) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical
values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless
otherwise stated the following conditions apply: VIN = 18V, VOUT = 3.3V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Start-Up Regulator, VCC
VCC
VCC output voltage
CCC = 680nF, no load
5.0
6.0
7.2
V
VIN - VCC
VIN - VCC dropout voltage
ICC = 2mA
50
140
mV
ICC = 20mA
350
570
IVCCL
VCC current limit
(1)
VCC = 0V
40
65
mA
VCC-UVLO
VCC under-voltage lockout threshold
VIN increasing
3.6
3.75
3.85
V
(UVLO)
VCC-UVLO-HYS
VCC UVLO hysteresis
VIN decreasing
130
mV
tVCC-UVLO-D
VCC UVLO filter delay
3
µs
IIN
IIN operating current
No switching, VFB = 1V
0.7
1
mA
IIN-SD
IIN operating current, Device shutdown
VEN = 0V
17
30
µA
Switching Characteristics
RDS-UP-ON
Main MOSFET Rds(on)
0.18
0.35
RDS- DN-ON
Syn. MOSFET Rds(on)
0.11
0.2
VG-UVLO
Gate drive voltage UVLO
VBST - VSW increasing
3.3
4
V
Soft-start
ISS
SS pin source current
VSS = 0.5V
6
8
9.8
µA
Current Limit
ICL
Syn. MOSFET current limit threshold
1.9
A
ON/OFF Timer
tON
ON timer pulse width
VIN = 10V, RON = 100 kΩ
1.38
µs
VIN = 30V, RON = 100 kΩ
0.47
tON-MIN
ON timer minimum pulse width
200
ns
tOFF
OFF timer pulse width
260
ns
Enable Input
VEN
EN Pin input threshold
VEN rising
1.236
1.26
1.285
V
VEN-HYS
Enable threshold hysteresis
VEN falling
90
mV
Regulation and Over-Voltage Comparator
VFB
In-regulation feedback voltage
VSS ≥ 0.8V
0.784
0.8
0.816
V
TJ = −40°C to + 125°C
VSS ≥ 0.8V
0.788
0.812
TJ = 0°C to + 125°C
VFB-OV
Feedback over-voltage threshold
0.894
0.920
0.940
V
IFB
5
100
nA
Thermal Shutdown
TSD
Thermal shutdown temperature
TJ rising
165
°C
TSD-HYS
Thermal shutdown temperature
TJ falling
20
°C
hysteresis
(1)
VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.
4
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