TL431 Programmable Precision Reference

MB3800 Switching Regulator Controller

Preliminary

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.

•

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

DIP-8

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

SOP-8

(for NPN transistors)

• Incorporates a stand-by function.

• Three types of packages (SOP-8 or SSOP-8)

SSOP-8

Pin No

Symbol

I/O

Description

1

-IN

I

Error amplifier inverting input pin

2

SCP

-

Soft start and SCP setting capacitor connection pin

3

VCC

-

Power Supply Pin

4

BR/CTL

I

Output current setting and control pin

5

OUT

O

Totem-pole type output pin

6

GND

-

GND Pin

7

OSC

-

Capacitor and resistor connection pin for setting the oscillation

frequency

8

FB

O

Error amplifier output pin

T

FEATURES