UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
CONNECTION DIAGRAMS
ABSOLUTE MAXIMUM RATINGS (Note 1)
PLCC-20, LCC-20
(TOP VIEW)
Q, L Packages
Supply Voltage (Low Impedance Source) . . . . . . . . . . . . . . 30V
Supply Voltage (ICC mA) . . . . . . . . . . . . . . . . . . . . Self Limiting
Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1A
Output Energy (Capacitive Load). . . . . . . . . . . . . . . . . . . . . 5µJ
Analog Inputs (Pins 2, 3). . . . . . . . . . . . . . . . . . . -0.3V to +6.3V
Error Amp Output Sink Current . . . . . . . . . . . . . . . . . . . . 10mA
Power Dissipation at TA ≤ 25°C (DIL-8) . . . . . . . . . . . . . . . . 1W
Storage Temperature Range. . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C
PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
1
Comp
N/C
VFB
2
3-4
5
N/C
ISENSE
N/C
RT/CT
N/C
Pwr Gnd
Gnd
N/C
Output
N/C
VC
VCC
N/C
6
7
Note 1. All voltages are with respect to Ground, Pin 5. Currents
are positive into, negative out of the specified terminal. Consult
Packaging Section of Databook for thermal limitations and con-
siderations of packages. Pin numbers refer to DIL package only.
8-9
10
11
12
13
14
15
16
17
18
19
20
SOIC-14 (TOP VIEW)
D Package
VREF
DIL-8, SOIC-8 (TOP VIEW)
J or N, D8 Package
SOIC-WIDE16 (TOP VIEW)
DW Package
N/C
N/C
16 N/C
1
2
3
4
5
6
7
8
15 VREF
14 VCC
COMP
VFB
13 VCC
ISENSE
RT/CT
N/C
12 OUTPUT
11 GND
10 PWRGND
N/C
9 N/C
2
TI [ TEXAS INSTRUMENTS ]
