MB3800 Datasheet, PDF (6/18 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

MB3800
(Continued)
Parameter
Symbol
Condition
Output section
Output current
setting section/
Control section
Entire device
Output voltage
Output source current
Output sink current
Pull down resistance
Pin voltage
Input off condition
Input on condition
Pin current range
Stand-by current
Average supply
current
VOH1
VOH2
VOL1
VOL2
IO+
IO–
RO
VBR
IOFF
ION
IBR
ICCS
ICC
RB = 390 Ω, IO = –15 mA
RB = 750 Ω, VCC = 1.8 V
IO = –10 mA
RB = 390 Ω, IO = 15 mA
RB = 750 Ω, VCC = 1.8 V
IO = 10 mA
RB = 390 Ω, VO = 0.9 V
RB = 390 Ω, VO = 0.3 V
—
RB = 390 Ω
—
BR/CTL pin open or VCC
RB = 390 Ω
Value
Unit
Min. Typ. Max.
1.0 1.2 — V
0.8 1.0 — V
— 0.1 0.2 V
— 0.1 0.2 V
— –30 –20 mA
30 60 — mA
20 30 40 kΩ
0.2 0.3 0.4 V
–20 — 0 µA
— — –45 µA
–1.8 — –0.1 mA
— — 1 µA
— 5.5 9.3 mA
s DIAGRAM
FB pin voltage
Reference input for short circuit
detection comparator
Idle period setting voltage
Sawtooth wave output
Soft start setting voltage
OUT pin waveforms
SCP pin waveforms
ON
Power supply control SW
OFF
Soft start
tS
Output
short
circuit
t PE
Output short circuit
Short circuit
detection
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