MB3800 データシートの表示（PDF） - Fujitsu

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MB3800

BIPOLAR Switching Regulator Controller(Low Voltage)

Fujitsu 

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)

5

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