LP3321 Datasheet, PDF (3/9 Pages) Lowpower Semiconductor inc – 1.3MHzFixed-Frequency PWM Operation

Preliminary Datasheet
LP3321
Absolute Maximum Ratings
Supply Input Voltage---------------------------------------------------------------------------------------------------−0.3V to 6.0V
SW Input Voltage --------------------------------------------------------------------------------------------------------−0.3V to 43V
The Other Pins ----------------------------------------------------------------------------------------------------------−0.3V to 5.5V
Power Dissipation, PD @ TA = 25°C TSOT-23-5/6-----------------------------------------------------------------------0.455W
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C
Operation Temperature Range ---------------------------------------------------------------------------------−40°C to 80°C
Storage Temperature Range ----------------------------------------------------------------------------------------−65°C to 150°C
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
Symbol
Test Condition
VDD
VDD
IDD
FB=0.2V, Switch
IDD
VEN < 0.4V
VIN : 3.0~4.3V
FOSC
LP3321
LP3321A
RDS(ON)
ILM
VOVP
VEN
VEN
VFB=0 V
VFB=195mV
Min
Typ.
Max Units
2.7
6
V
2.2
2.4 ^2.6
V
430
550 uA
0.1
1
uA
2
%
1.0
1.3
1.5
MHz
93
%
185
195
205 mV
285
300
315 mV
0.5
Ω
1.4
A
42
V
5
μA
0.4
V
0.6
V
0.7
V
1.4
V
LP3321 – 01 Vesion 1.1 Datasheet Feb.-2011
www.lowpowersemi.com
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