MB3800_06 Datasheet, PDF (5/20 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

MB3800
■ ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Condition
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
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
VT input stability
VT variation with
temperature
Input bias current
Voltage gain
Frequency bandwidth
Maximum output
voltage range
Output source current
Output sink current
Idle period
adjustment section
Maximum duty cycle
VR
—
VTH
ICS
VSCP = 0 V
VtS
—
ICPC
VSCP = 0 V
VtPC
—
fOCS RT = 3.0 kΩ, CT = 270 pF
fdV VCC = 2 V to 15 V
fdT Ta = –30°C to +85°C
VT
VTdV
VTdT
IB
AV
BW
VOM+
VOM–
IOM+
IOM–
tDUTY
VFB = 450 mV
VCC = 2 V to 15 V
Ta = –30°C to +85°C
VIN = 0 V
—
AV = 0 dB
—
VFB = 0.45 V
RT = 3.0 kΩ, CT = 270 pF
VFB = 0.8 V
(VCC = +2 V, Ta = +25°C)
Value
Unit
Min Typ Max
— — 0.9 V
1.1 1.3 1.5 V
–1.5 –1.0 –0.7 µA
0.7 0.8 0.9 V
–1.5 –1.0 –0.7 µA
0.7 0.8 0.9 V
400 500 600 kHz
— 2 10 %
— 5 —%
480 500 520 mV
— 5 20 mV
— 1 —%
–1.0 –0.2 +1.0 µA
70 100 145 V/V
— 6 — MHz
0.78 0.87 — V
— 0.05 0.2 V
— –40 –24 µA
24 40 — µA
65 75 85 %
(Continued)
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