UC3844B, UC3845B, UC2844B, UC2845B
V
CC
7(12)
V
ref
8(14)
R
R
V
ref
Undervoltage
Lockout
5.0V
Reference
V
CC
Undervoltage
Lockout
V
C
7(11)
Output
6(10)
Power
Ground
5(8)
R
T
/C
T
4(7)
Voltage
Feedback
Input
Output/
Compensation
1(1)
Oscillator
Latching
PWM
2(3)
Error
Amplifier
3(5)
GND
5(9)
Current
Sense Input
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
Figure 1. Simplified Block Diagram
ORDERING INFORMATION
Device
UC384xBD
UC384xBDR2
UC3844BDR2G
UC384xBD1
UC3844BD1G
T
A
= 0° to +70°C
UC384xBD1R2
UC384xBD1R2G
UC384xBN
UC384xBNG
UC2845BD
UC284xBDR2
UC2845BDR2G
UC2845BD1
UC284xBD1R2
UC284xBD1R2G
UC2844BN
UC384xBVD
UC3844BVDR2
UC384xBVD1
UC384xBVD1R2
UC384xBVN
T
A
= −40° to +105°C
T
A
= −25° to +85°C
Operating
Temperature Range
Package
SOIC−14
SOIC−14
SOIC−14
(Pb−Free)
SOIC−8
SOIC−8
(Pb−Free)
SOIC−8
SOIC−8
(Pb−Free)
PDIP−8
PDIP−8
(Pb−Free)
SOIC−14
SOIC−14
SOIC−14
(Pb−Free)
SOIC−8
SOIC−8
SOIC−8
(Pb−Free)
PDIP−8
SOIC−14
SOIC−14
SOIC−8
SOIC−8
PDIP−8
Shipping
†
55 Units/Rail
2500 Tape & Reel
2500 Tape & Reel
98 Units/Rail
98 Units/Rail
2500 Tape & Reel
2500 Tape & Reel
50 Units/Rail
50 Units/Rail
55 Units/Rail
2500 Tape & Reel
2500 Tape & Reel
98 Units/Rail
2500 Tape & Reel
2500 Tape & Reel
50 Units/Rail
55 Units/Rail
2500 Tape & Reel
98 Units/Rail
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
ONSEMI [ ON SEMICONDUCTOR ]
