US3021BCW Ver la hoja de datos (PDF) - Unisem
Número de pieza
componentes Descripción
Lista de partido
US3021BCW Datasheet PDF : 8 Pages
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US3021B
Error Comparator Section
Input bias current
Input Offset Voltage
-2
Delay to Output
Vdiff=10mV
Current Limit Section
C.S Threshold Set Current
C.S Comp Offset Voltage
-5
Hiccup Duty Cycle
Css=0.1 uF
Output Drivers Section
Rise Time
CL=3000pF
Fall Time
CL=3000pF
Dead band Time Between
High side and Synch Drive
(Vcore Switcher Only)
CL=3000pF
Oscillator Section (internal)
Osc Frequency
Rt=Open
1.8V Regulator (Vsen 4)
Vsense Voltage
Vo4 Ta=25, Drive4 = Vsen4
Vsense Voltage
Input bias current
Output Drive Current
Vaux-Vdrive>0.6V
50
1.5V Regulator (Vsen 3)
Vsense Voltage
Vsense Voltage
Input bias current
Output Drive Current
Vo3 Ta=25, Drive3 = Vsen3
Vaux-Vdrive>0.6V
50
Power Good Section
Vsen1 UV lower trip point
Vsen1 UV upper trip point
Vsen1 UV Hysterises
Vsen1 HV upper trip point
Vsen1 HV lower trip point
Vsen1 HV Hysterises
Vsen2 trip point
Vsen4 trip point
Vsen3 trip point
Power Good Output LO
Power Good Output HI
Fault (Overvoltage) Section
Core O.V. upper trip point
Core O.V. lower trip point
FAULT Output HI
Soft Start Section
Soft Start Current
Vsen1 ramping down
Vsen1 ramping up
Vsen1 ramping up
Vsen1 ramping down
Select<0.8V
Select>2V
Fix=GND
Fix=Open
Fix=GND
Fix=Open
RL=3mA
RL=5K pull up to 5V
Vsen1 ramping up
Vsen1 ramping down
Io=3mA
OCset=0V , Phase=5V
2
uA
+2
mV
100
nS
200
uA
+5
mV
10
%
70
nS
70
nS
200
nS
217
Khz
1.800
V
1.800
V
2
uA
mA
1.500
V
1.500
V
2
uA
mA
0.90Vs
V
0.92Vs
V
.02Vs
V
1.10Vs
V
1.08Vs
V
.02Vs
V
1.100
V
2.560
V
0.920
V
1.320
V
0.920
V
1.140
V
0.4
V
4.8
V
1.17Vs
V
1.15Vs
V
10
V
20
uA
Rev. 1.4
12/8/00
4-3
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