MB3776A Datasheet, PDF (5/16 Pages) Fujitsu Component Limited. – Switching Regulator Controller

MB3776A
s ELECTRICAL CHARACTERISTICS
1. Reference Section and Error Amp. Section
Parameter
Input threshold voltage
VT input stability
VT temp. stability
Input bias current
Voltage gain
Frequency band width
Symbol
Condition
VT
VTdV1
VTdV2
VTdT
IB
AV
BW
VFB = 450 mV
VCC = 2.0 V to 6.0 V
VCC = 6.0 V to 15 V
Ta = –30 °C to +75 °C
VIN = 0 V to 0.6 V
—
AV = 0 dB
(Ta = +25°C, VCC = 3 V)
Value
Unit
Min Typ Max
487 507 527 mV
–5 — 5 mV
–5 — 5 mV
–3 — 3 %
–1.0 –0.2 1.0 µA
70 100 145 V/V
— 6 — MHz
2. Saw-tooth Waveform Oscillator Section
Parameter
Oscillator frequency
Frequency input stability
Frequency temp. stability
Symbol
Condition
fOSC
RT = 3.0 kΩ
CT = 1000 pF
fdV VCC = 2.0 V to 15 V
fdT Ta = –30°C to +75°C
(Ta = +25°C, VCC = 3 V)
Value
Unit
Min Typ Max
160 200 240 kHz
— ±2 — %
— ±10 — %
3. Under Lockout Protection
Parameter
Threshold voltage
Symbol
VTH
Condition
—
(Ta = +25°C, VCC = 3 V)
Value
Unit
Min Typ Max
— 1.4 — V
4. Dead-time Control Section
Parameter
Max duty cycle
Symbol
Condition
tDUTY
CT = 1000 pF
RT = 3.0 kΩ
VFB = 0.9 V
(Ta = +25°C, VCC = 3 V)
Value
Unit
Min Typ Max
60 70 85 %
5