LP3205 Datasheet, PDF (4/10 Pages) Lowpower Semiconductor inc – 1.5MHZ,800mA,High Efficiency Synchronous PWM Step-Down DC/DC Convert

Preliminary Datasheet
Electrical Characteristics
LP3205
(VIN = 3.6V, VOUT = 2.5V, VREF = 0.6V, L = 4.7µH, CIN= 4.7µF, COUT= 10µF, TA= 25°C, IMAX = 800mA
unless otherwise specified)
Parameter
Input Voltage Range
Operating Supply Current
Standby Mode Supply
Current
Shutdown Current
Reference Voltage
Symbol
VIN
ISHDN
VREF
Test Conditions
IOUT=0mA,VFB=0.5V or VOUT=90%
IOUT=0mA,VFB=0.62V or VOUT=103%
EN = GND,Vin=4.2V
For adjustable output voltage
Min
2.5
0.58
Adjustable Output Range VOUT
VREF
Output
Voltage
Accuracy
FB Input
Current
PMOSFET
RON
NMOSFET
RON
P-Channel
Current Limit
EN
Threshold
EN Leakage
Current
Fixed
Adjustable
IFB
PRDS(ON)
NRDS(ON)
IP(LM)
VEN
VENL
ΔVOUT
ΔVOUT
ΔVOUT
ΔVOUT
ΔVOUT
ΔVOUT
ΔVOUT
VFB =
VIN
IOUT =
200mA
IOUT =
200mA
VIN =2.2
to 5.5V
VIN = 2.2 to 5.5V, VOUT = 1.2V 0A <
IOUT < 800mA
−3
VIN = 2.2 to 5.5V, VOUT = 1.5V 0A <
IOUT < 800mA
−3
VIN = 2.2 to 5.5V, VOUT = 1.8V 0A <
IOUT < 800mA
−3
VIN = 2.8 to 5.5V, VOUT = 2.5V 0A <
IOUT < 800mA
−3
VIN = 3.5 to 5.5V, VOUT = 3.3V 0A <
IOUT < 800mA
−3
VIN = VOUT + 0.2V to 5.5V, VIN ≧
3.5V 0A < IOUT < 800mA
−3
VIN = VOUT + 0.4V to 5.5V, VIN ≧
2.2V 0A < IOUT < 800mA
−3
-30
VIN = 3.6V
VIN = 3.6V
0.9
0.4
--
Typ
300
22
0.1
0.6
0.4
0.35
1
2
Max
5.5
400
35
1
0.62
VIN −
0.2
+3
+3
+3
+3
+3
+3
+3
30
0.58
1.5
1.5
Units
V
uA
V
V
%
%
%
%
%
%
%
nA
Ω
Ω
A
V
uA
LP3205 – Ver. 1.0 Datasheet Feb.-2007
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