MB3800 Datasheet, PDF (1/4 Pages) Fujitsu Component Limited. – Switching Regulator Controller (Low Voltage)

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Preliminary
The MB3800 is a single-channel switching regulator control IC
for low voltage applications incorporating a soft start function and short circuit detection function.
The device has a low minimum operating voltage of 1.8 V and is ideal for the power supply of
battery-operated electronic equipment.
FEATURES
• Wide supply voltage operating range: 1.8 to 15 V
• Low current consumption: Typically 5.5 mA in
operation, 1μA or less in stand-by
• High speed operation is possible: Maximum 1 MHz
• The error amplifier gain is set inside the IC, so
peripheral components are minimized.
• Incorporates a soft start circuit.
• Incorporates a timer-latch type short circuit
detection circuit .
• Totem-pole type output with adjustable on/off current
(for NPN transistors)
• Incorporates a stand-by function.
• Three types of packages (SOP-8 or SSOP-8)
DIP-8
SOP-8
SSOP-8
Pin No
1
2
3
4
5
6
7
8
Symbol
-IN
SCP
VCC
BR/CTL
OUT
GND
OSC
FB
I/O
Description
I Error amplifier inverting input pin
- Soft start and SCP setting capacitor connection pin
- Power Supply Pin
I Output current setting and control pin
O Totem-pole type output pin
- GND Pin
- Capacitor and resistor connection pin for setting the oscillation
frequency
O Error amplifier output pin