MB3775 Datasheet, PDF (1/25 Pages) Fujitsu Component Limited. – SWITCHING REGULATOR CONTROLLER

FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27204-3E
ASSP
SWITCHING REGULATOR
CONTROLLER
MB3775
LOW VOLTAGE DUAL PWM SWITCHING
REGULATOR CONTROLLER
The MB3775 is a dual pulse-width-modulation control circuit. It contains the basic
circuits required for two PWM control circuits. Complete synchronization is
obtained by using the same oscillator output waveform.
This IC can provide following types of output voltage: step down, step up, and
inverter. Power consumption is low, thus the MB3775 is ideal for use in high-
efficiency portable equipment.
• Wide supply voltage range: 3.6 V to 18 V
• Low current consumption: 1.3 mA typical
• Wide oscillation frequency range: 1 kHz to 500 kHz
• On-chip timer latch short protection circuit
• On-chip under voltage lockout protection
• On-chip reference voltage: 1.28 V
• Variable dead time provides control over total operating range.
(DIP-16P-M04)
(FPT-16P-M06)
ABSOLUTE MAXIMUM RATINGS (see NOTE)
(Ta = 25°C)
Rating
Symbol
Condition
Value
Unit
Power Supply Voltage
VCC
20
V
Error Amp. Input Voltage
VI
-0.3 to +10 V
Collector Output Voltage VO
20
V
Collector Output Current
IO
75
mA
Ta ≤ 25 °C(SOP)
*620
mW
Power Dissipation
PD
Ta ≤ 25 °C(DIP)
1000
mW
Ta ≤ 25°C(VSOP)
*430
mW
Operating Temperature TOP
-30 to +85 °C
Storage temperature
Tstg
-55 to+125 °C
*: The packages are mounted on the epoxy board (4 cm x 4 cm x 1.5 mm)
NOTE : Permanent device damage may occur if the above Absolute Maximum
Ratings are exceeded. Functional operation should be restricted to the
conditions as detailed in the operational sections data sheet. Exposure
to absolute maximum rating conditions for extended periods may affect
device reliability.
(FPT-16P-M05)
PIN ASSIGNMENT
(TOP VIEW)
CT 1
RT ₂
+IN1 ₃
-IN1 ₄
FB1 ₅
D.T.C.1 ₆
OUT1 ₇
E/GND ₈
16 VREF
15 SCP
14 +IN2
13 ^-IN2
12 ^FB2
11 ^D.T.C.2
10 ^OUT2
9 ^VCC
This device contains circuitry to protect the inputs against
damage due to high static voltages or electric fields. However,
it is advised that normal precautions be taken to avoid
application of any voltage higher than maximum rated voltages
to this high impedance circuit.
1