MB3800 Datasheet, PDF (3/4 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

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Preliminary
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Condition
Value
Min Typ Max
Circuit to prevent Reset Voltage VR
-
malfunction at low
-
-
0.9
input voltage
(U.V.L.O.)
Threshold
VTH
Voltage
1.1 1.3 1.5
Soft start
Charging Current ICS
VSCP=0V
-1.5 -1.0 -0.7
Voltage at soft VtS
-
0.7 0.8 0.9
start completion
Short circuit
Charging current ICPC
VSCP=0V
-1.5 -1.0 -0.7
detection (S.C.R)
Threshold
VtPC
-
0.7 0.8 0.9
Voltage
Sawtooth wave
Oscillation
fOSC RT=3.0KΩCT=270pF 400 500 600
oscillator (OSC)
frequency
Frequency input fdV
VCC=2V to 15V
-
2
10
Stability
Frequency
fdT
Ta=-30℃~+85℃
-
5
-
variation with
temperature
Input Threshold VT
VFB=450mV
Voltage
VT Input stability VTdV
VCC=2V ~15V
480 500 520
VT variation with VTdT _{Ta=-30℃~+85℃}
-
temperature
Input bias current IB
VIN=0V
-
5
20
1
-
Voltage Gain
AV
-
70 100 145
Error amplifier
Frequency
bandwidth
Maximum output
voltage range
Output source
current
Output sink
current
BW
VOM+
VOM-
IOM+
IOM-
AV=0dB
-
VFB=0.45V
-
6
-
0.78 0.87
-
-
0.05 0.2
-
-40 -24
24
40
-
Idle period
Maximum duty tDUTY
RT=3.0KΩ
65
75
85
adjustment section
cycle
CT=270pF,VFB=0.8V
Output section
Output voltage VOH1 RB=390Ω,IO=-15mA 1.0
1.2
-
VOH2
RB=750Ω,
0.8 1.0
-
VCC=-15mA,IO=-10mA
VOL1 RB=390Ω,IO=15mA
-
0.1 0.2
Output source
current
Output sink
current
Pull down
resistance
VOL2
RB=750Ω,
-
VCC=-15mA,IO=10mA
IO⁺ RB=390Ω,VO=0.9V
-
IO^- RB=390Ω,VO=0.3V 30
RO
-
20
0.1 0.2
-30 -20
60
-
30
40
Unit
V
μA
V
μA
V
KHz
%
%
mV
mV
%
V/V
MHz
V
V
μA
μA
%
V
V
V
V
mA
mA
kΩ