LP3385 Datasheet, PDF (4/9 Pages) Lowpower Semiconductor inc – 1.2MHzFixed-Frequency PWM Operation

Preliminary Datasheet
LP3385
Absolute Maximum Ratings
Supply Input Voltage---------------------------------------------------------------------------------------------------−0.3V to 6.0V
SW Input Voltage ---------------------------------------------------------------------------------------------------------−0.3V to 45V
The Other Pins -----------------------------------------------------------------------------------------------------------−0.3V to 5.5V
Power Dissipation, PD @ TA = 25°C SOT-23-6----------------------------------------------------------------------------0.455W
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------------- 280°C
Operation Temperature Range ------------------------------------------------------------------------------ −40°C to 80°C
Storage Temperature Range ----------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility
HBM(Human Body Mode) ---------------------------------------------------------------------------------------- 4KV
MM((Machine Mode)) -------------------------------------------------------------------------------------------- 200V
Electrical Characteristics
Parameter
System Supply Input
Operation voltage Range
Under Voltage Lock Out
Supply Current
Shut Down Current
Line Regulation
Oscillator
Operation Frequency
Maximum Duty Cycle
Feedback Voltage
MOSFET
On Resistance of MOSFET
SW Current Limit
Protection
OVP Threshold
OVP Sink Current
Shut Down Voltage
Enable on Voltage
Minimum EN Dimming
Threshold
Minimum EN Dimming
Threshold
PWM EN Dimming range
Symbol
Test Condition
VDD
VDD
IDD
FB=0.2V, Switch
IDD
VEN < 0.4V
VIN : 3.0~4.3V
FOSC
LP3385
RDS(ON)
ILM
VOVP
VEN
VEN
VFB=0 V
VFB=300mV
Min
Typ.
Max Units
2.7
2.4
90
0.1
2
6
V
V
uA
1
uA
%
1.2
MHz
93
%
285
300
315 mV
0.2
Ω
2
A
36
V
5
μA
0.4
V
0.7
V
0.7
V
1.4
V
100
500K _Hz
LP3385 – 00 Version 1.0 Datasheet FEB.-2012
www.lowpowersemi.com
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