MB3800 Fujitsu Microelectronics, Inc., MB3800 Datasheet - Page 5

• Manufacturer Part Number: MB3800
• Description: Switching Regulator Controller (low Voltage)
• Manufacturer: Fujitsu Microelectronics, Inc.

Circuit to prevent
malfunction at low
input voltage
(U.V.L.O.)
Soft start
Short circuit
detection (S.C.P .)
Sawtooth wave
oscillator (OSC)
Error amplifier
Idle period
adjustment section
ELECTRICAL CHARACTERISTICS
Parameter
Reset voltage
Threshold voltage
Charging current
Voltage at soft start
completion
Charging current
Threshold voltage
Oscillation frequency
Frequency input
stability
Frequency variation
with temperature
Input threshold
voltage
V
V
temperature
Input bias current
Voltage gain
Frequency bandwidth
Maximum output
voltage range
Output source current
Output sink current
Maximum duty cycle
T
T
input stability
variation with
Symbol
V
V
t
V
V
V
BW
I
f
I
I
V
DUTY
V
V
I
CPC
OCS
f
f
V
A
OM +
OM
I
OM +
OM –
CS
dV
tPC
dT
TdV
TdT
TH
B
tS
R
T
V
–
V
V
R
V
Ta = –30°C to +85°C
V
V
Ta = –30°C to +85°C
V
A
V
R
V
SCP
SCP
CC
FB
CC
IN
V
FB
FB
T
T
= 0 dB
= 3.0 k , C
= 3.0 k , C
= 0 V
= 450 mV
= 0.45 V
= 0.8 V
= 2 V to 15 V
= 2 V to 15 V
= 0 V
= 0 V
Condition
—
—
—
—
—
T
T
= 270 pF
= 270 pF
Min.
–1.5
–1.5
–1.0
0.78
400
480
1.1
0.7
0.7
70
24
65
—
—
—
—
—
—
—
—
(V
CC
Value
Typ. Max.
–1.0
–1.0
–0.2
0.87
0.05
= +2 V, Ta = +25 C)
500
500
100
–40
1.3
0.8
0.8
40
75
—
2
5
5
1
6
MB3800
–0.7
–0.7
600
520
145
–24
0.9
1.5
0.9
0.9
1.0
0.2
10
20
85
(Continued)
—
—
—
—
—
MHz
Unit
kHz
V/V
mV
mV
%
%
%
%
V
V
V
V
V
V
A
A
A
A
A
5