B3800 Bay Linear, B3800 Datasheet

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B3800

Manufacturer Part Number
B3800
Description
Step up Dc-to-dc Converter
Manufacturer
Bay Linear
Datasheet
Pin Connection
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.
Bay Linear, Inc
Bay Linear
Inspire the Linear Power
BR/CTL
BR/CTL
-IN
-IN
SCP
SCP
Vcc
Vcc
8-Pin Surface Mount
8-
8-Pin Surface Mount
8-
2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
Top View
Top View
Step Up Low Voltage (BIPOLAR)
Switching Regulator Controller
8
8
8
8
7
7
7
7
6
6
6
6
5
5
5
5
FB
FB
OSC
OSC
GND
GND
OUT
OUT
Features
Applications
Ordering Information
B3800M
8-pin
SO-8
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
Digital Camera
MP3
Low Battery Operating Applications
B3800P
P-DIP
8-pin
Temp. Range
www.baylinear.com
-40°C to 85°C
Operating
B3800

Related parts for B3800

B3800 Summary of contents

Page 1

... 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. Pin Connection 8-Pin Surface Mount 8- 8- 8-Pin Surface Mount ...

Page 2

... Tstg Symbol Min V 1 -. 150 100 OSC T -30 OP B3800 Value Unit 570 mW 430 mW 580 mW °C -30 to +85 -55 to +125 °C Values Typ. Max 1 0.1 - 0.1 - 390 5000 3.0 10.0 270 10000 ...

Page 3

... V =0. =390Ω, V =0. =390Ω OFF BR/CTL pin open or I CCB =390Ω B3800 Value Unit Min. Typ. Max 0.9 V 1.1 1.3 1.5 V -1.5 -1.0 -0.7 µA 0.7 0.8 0.9 V -1.5 -1.0 -0.7 µA 0.7 0.8 0 400 500 600 ...

Page 4

... TIMMING DIAGRAM BLOCK DIAGRAM Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 B3800 www.baylinear.com ...

Page 5

... Typical Characteristics Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 B3800 www.baylinear.com ...

Page 6

... Typical Characteristics (continued) Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 B3800 www.baylinear.com ...

Page 7

... Typical Characteristics (continued) Bay Linear B3800 Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 B3800 www.baylinear.com ...

Page 8

... On detection, the circuit fixes the output pin to low. The system recovers when the supply voltage rises back above the threshold voltage of the malfunction prevention circuit. B3800 www.baylinear.com ...

Page 9

... SCP pin reaches approximately 0.8V, the output pin is set low and the SCP pin stays low. Once the protection circuit operates, the circuit can be restored by resetting the power supply. • Short circuit detection time T [s] @ 0.8 ´ CPE [mF] PE B3800 B3800 www.baylinear.com ...

Page 10

... Bay Linear, Inc 2418 Armstrong Street, Livermore, CA 94550 Tel: (925) 606-5950, Fax: (925) 940-9556 4.0 (0.158) 5.2 (0.205) 3.8 (0.150) 4.6 (0.181) 1.75 (0.069) 1.35 (0.053) 0.78 (0.031) 0.61 (0.024) 45 ° 0.37 (0.015) BSC 0.22 (0.009) 0.20 (0.008) 0.19 (0.007) 0.10 (0.004) B3800 6.2 (0.244) 5.8 (0.228) 0.77 (0.030) 0.64 (0.025) 7 ° (4 PLCS) 3 ° -6° 7 ° (4 PLCS) www.baylinear.com ...

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