US3022
Error Comparator Section
Input bias current
Input Offset Voltage
Delay to Output
Current Limit Section
C.S Threshold Set Current
C.S Comp Offset Voltage
Hiccup Duty Cycle
Output Drivers Section
Rise Time
2
+2
100
uA
mV
nS
-2
-5
Vdiff=10mV
Css=0.1 uF
200
10
uA
mV
%
+5
CL=3000pF
CL=3000pF
70
70
nS
nS
Fall Time
Dead band Time Between
High side and Synch Drive
(Vcore Switcher Only)
Oscillator Section (internal)
Osc Frequency
CL=3000pF
200
217
nS
Rt=Open
Khz
1.8V Regulator (Vsen 4)
Vsense Voltage
Vsense Voltage
Vo4
Ta=25, Drive4 = Vsen4
1.800
1.800
V
V
Input bias current
Output Drive Current
2
uA
mA
Vaux-Vdrive>0.6V
50
1.5V Regulator (Vsen 3)
Vsense Voltage
Vsense Voltage
Vo3
Vo5
Ta=25, Drive3 = Vsen3
1.500
1.500
V
V
uA
mA
Input bias current
2
2
Output Drive Current
2.5V Regulator (Vsen 5)
Vsense Voltage
Vsense Voltage
Input bias current
Output Drive Current
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
Vaux-Vdrive>0.6V
50
50
Ta=25, Drive5 = Vsen5
2.500
2.500
V
V
uA
mA
Vaux-Vdrive>0.6V
Vsen1 ramping down
Vsen1 ramping up
0.90Vs
0.92Vs
.02Vs
1.10Vs
1.08Vs
.02Vs
1.100
2.560
1.320
1.140
1.875
0.4
V
V
V
V
V
V
V
V
V
V
V
V
V
Vsen1 ramping up
Vsen1 ramping down
Select<0.8V
Select>2V
Vsen4 trip point
Vsen3 trip point
Vsen5 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
RL=3mA
RL=5K pull up to 5V
4.8
Vsen1 ramping up
Vsen1 ramping down
Io=3mA
1.17Vs
1.15Vs
10
V
V
V
Soft Start Section
Soft Start Current
OCset=0V , Phase=5V
20
uA
Note 1: Vs refers to the set point voltage given in Table 1.
Rev. 1.0
11/2/99
4-3
UNISEM [ UNISEM ]
