Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com




Switching Regulator Controller

B3800
Step Up Low Voltage (BIPOLAR)























Pin Connection

Ordering Information














SO-8
8-pin
P-DIP
8-pin
Operating
Temp. Range
B3800M B3800P -40°C to 85°C









Description

The Bay Linear B3800 series is monolithic control circuit
containing the primary functions required for DC-to-DC
converters. This device is design for low voltage applications
incorporating a soft start function and sort circuit detection
function. The device has a low minimum operating voltage of
1.8V and is ideal for the power supply of battery-operated
electronic equipments.

This series was specially designed to be incorporated in Step-
Down and voltage-inverting applications with a minimum
number of external components.

The B3800 is offer in 8-pin DIP or Surface mount package.
Features
• Wide operation from…………... 1.8 to 15V
• Low Standby Current……………….. 1 µA
• Low Current Consumption……… 5.5mA
• high Speed Operation ……………. 1MHz
• Incorporates soft start circuit
• Incorporates a stand-by function
• Incorporate a times-latch short circuit
detection circuit (SCP)
• Totem-pole type output with adjustable
on/off current (for NPN transistor)
• The error amplifier gain is set inside the
IC, so peripheral components are
minimized.
• Direct Replacement for MB3800
Applications
• Digital Camera
• MP3
• Low Battery Operating Applications

Bay Linear
Inspire the Linear Power
2
1
3
4
8
7
6
5
8-Pin Surface Mount
To p V ie w
-IN FB
SCP
8-
GND
OUT
OSC
Vcc
BR/CTL