UC3844B, UC3845B, UC2844B, UC2845B
V
7(12)
CC
V
CC
5.0V
Reference
V
ref
Undervoltage
Lockout
8(14)
R
R
V
ref
Undervoltage
Lockout
V
C
7(11)
Output
6(10)
R /C
T
Oscillator
T
4(7)
Latching
PWM
Power
Ground
Voltage
Feedback
Input
5(8)
3(5)
2(3)
1(1)
Error
Amplifier
Current
Sense Input
Output/
Compensation
GND
5(9)
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
Figure 1. Simplified Block Diagram
ORDERING INFORMATION
Operating
Temperature Range
†
Device
Package
SOIC−14
SOIC−14
Shipping
UC384xBD
55 Units/Rail
UC384xBDR2
UC3844BDR2G
2500 Tape & Reel
2500 Tape & Reel
SOIC−14
(Pb−Free)
UC384xBD1
SOIC−8
98 Units/Rail
98 Units/Rail
UC3844BD1G
SOIC−8
(Pb−Free)
T = 0° to +70°C
A
UC384xBD1R2
SOIC−8
2500 Tape & Reel
2500 Tape & Reel
UC384xBD1R2G
SOIC−8
(Pb−Free)
UC384xBN
PDIP−8
50 Units/Rail
50 Units/Rail
UC384xBNG
PDIP−8
(Pb−Free)
UC2845BD
SOIC−14
SOIC−14
55 Units/Rail
UC284xBDR2
UC2845BDR2G
2500 Tape & Reel
2500 Tape & Reel
SOIC−14
(Pb−Free)
UC2845BD1
SOIC−8
SOIC−8
98 Units/Rail
T = −25° to +85°C
A
UC284xBD1R2
UC284xBD1R2G
2500 Tape & Reel
2500 Tape & Reel
SOIC−8
(Pb−Free)
UC2844BN
PDIP−8
SOIC−14
SOIC−14
SOIC−8
SOIC−8
PDIP−8
50 Units/Rail
55 Units/Rail
UC384xBVD
UC3844BVDR2
UC384xBVD1
UC384xBVD1R2
UC384xBVN
2500 Tape & Reel
98 Units/Rail
T = −40° to +105°C
A
2500 Tape & Reel
50 Units/Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
x indicates either a 4 or 5 to define specific device part numbers.
http://onsemi.com
2
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