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LM3100 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
LM3100 SIMPLE® SWITCHER® Synchronous 1MHz 1.5A Step-Down Voltage Regulator TI
Texas Instruments TI
LM3100 Datasheet PDF : 21 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
LM3100
SNVS421G – JANUARY 2006 – REVISED APRIL 2013
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 ensured 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
VIN - VCC
VIN - VCC dropout voltage
IVCCL
VCC-UVLO
VCC current limit(1)
VCC under-voltage lockout threshold
(UVLO)
CCC = 680nF, no load
ICC = 2mA
ICC = 20mA
VCC = 0V
VIN increasing
5.0
6.0
7.2
V
50
140
mV
350
570
40
65
mA
3.6
3.75
3.85
V
VCC-UVLO-HYS
VCC UVLO hysteresis
tVCC-UVLO-D
VCC UVLO filter delay
IIN
IIN operating current
IIN-SD
IIN operating current, Device shutdown
Switching Characteristics
VIN decreasing
No switching, VFB = 1V
VEN = 0V
130
mV
3
µs
0.7
1
mA
17
30
µA
RDS-UP-ON
RDS- DN-ON
VG-UVLO
Soft-start
Main MOSFET Rds(on)
Syn. MOSFET Rds(on)
Gate drive voltage UVLO
VBST - VSW increasing
0.18
0.35
0.11
0.2
3.3
4
V
ISS
Current Limit
SS pin source current
VSS = 0.5V
6
8
9.8
µA
ICL
ON/OFF Timer
Syn. MOSFET current limit threshold
1.9
A
tON
tON-MIN
tOFF
Enable Input
ON timer pulse width
ON timer minimum pulse width
OFF timer pulse width
VIN = 10V, RON = 100 k
VIN = 30V, RON = 100 k
1.38
µs
0.47
200
ns
260
ns
VEN
EN Pin input threshold
VEN-HYS
Enable threshold hysteresis
Regulation and Over-Voltage Comparator
VEN rising
VEN falling
1.236
1.26
1.285
V
90
mV
VFB
In-regulation feedback voltage
VFB-OV
IFB
Thermal Shutdown
Feedback over-voltage threshold
VSS 0.8V
TJ = 40°C to + 125°C
VSS 0.8V
TJ = 0°C to + 125°C
0.784
0.8
0.816
V
0.788
0.812
0.894
0.920
0.940
V
5
100
nA
TSD
TSD-HYS
Thermal shutdown temperature
Thermal shutdown temperature
hysteresis
TJ rising
TJ falling
165
°C
20
°C
(1) VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.
4
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