US3018 Datasheet, PDF (3/17 Pages) UNISEM – 5 BIT PROGRAMMABLE SYNCHRONOUS BUCK PLUS LDO CONTROLLER AND 200mA LDO ON BOARD

US3018
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
2.5V Regulator (Vout 2)
Reference Voltage
Vo2 Ta=25, Vout2 = FB2
Reference Voltage
Dropout Voltage
Io = 200 mA
Load Regulation
1mA< Io <200 mA
Line Regulation
3.1V<Vin2<4V, Vo=2.5V
Input bias current
Output Current
200
Current limit
300
Thermal Shutdown
1.5V Regulator (Vout 3)
Reference Voltage
Vo3 Ta=25, GATE3 = FB3
Reference Voltage
Input bias current
Output Drive Current
50
Power Good Section
Core U.V lower trip point
Vsen1 ramping down
Core U.V upper trip point
Vsen1 ramping up
Core U.V Hysterises
Core O.V upper trip point
Vsen1 ramping up
Core O.V lower trip point
Vsen1 ramping down
Core O.V Hysterises
FB2 lower trip point
FB2 ramping down
FB2 upper trip point
FB2 ramping up
FB3 lower trip point
FB3 ramping down
FB3 upper trip point
FB3 ramping up
Power Good Output LO
RL=3mA
Power Good Output HI
RL=5K pull up to 5V
Fault (Overvoltage) Section
Core O.V upper trip point
Vsen1 ramping up
Core O.V lower trip point
Vsen1 ramping down
Vin2 upper trip point
Vin2 ramping up
Vin2 lower trip point
Vin2 ramping down
FAULT Output HI
Io=3mA
Soft Start Section
Pull up resistor to 5V
OCset=0V , Phase=5V
Note 1: Vs refers to the set point voltage given in Table 1.
Rev. 1.4
12/8/00
2
+2
100
200
+5
10
70
70
200
200
1.260
1.260
0.6
0.5
0.2
2
145
1.260
1.260
2
0.90Vs
0.92Vs
.02Vs
1.10Vs
1.08Vs
.02Vs
0.95
1.05
0.95
1.05
0.4
4.8
1.17Vs
1.15Vs
4.3
4.2
10
23
uA
mV
nS
uA
mV
%
nS
nS
nS
Khz
V
V
V
%
%
uA
mA
mA
°C
V
V
uA
mA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
KΩ
4-3