ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage (Pin 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Collector Supply Voltage (Pin 13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Output Current, Source or Sink (Pins 11, 14) . . . . . . . . . . . . . . . . . . . . . . . 500mA
Analog Inputs (Pins 3, 4, 5, 6, 16). . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +V
IN
Reference Output Current (Pin 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30mA
Sync Output Current (Pin 10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5mA
Error Amplifier Output Current (Pin 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -5mA
Soft Start Sink Current (Pin 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Oscillator Charging Current (Pin 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Power Dissipation at T
A
=25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000mW
Power Dissipation at T
C
=25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000mW
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (soldering, 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . +300°C
Note 1. All voltages are with respect to Ground, Pin 13. Currents are positive into,
negative out of the speficied terminal. Consult Packaging Section of Databook for
thermal limitations and considerations of packages. Pin numbers refer to DIL and
SOIC packages only.
UC1846/7
UC2846/7
UC3846/7
CONNECTION DIAGRAMS
DIL-16, SOIC-16
(TOP VIEW)
J or N Package, DW Package
PLCC-20, LCC-20
(TOP VIEW)
Q, L Packages
PACKAGE PIN FUNCTION
FUNCTION
PIN
1
N/C
C/L SS
2
V
REF
3
C/S-
4
C/S+
5
N/C
6
E/A+
7
E/A-
8
Comp
9
C
T
10
N/C
11
R
T
12
Sync
13
A Out
14
Gnd
15
N/C
16
V
C
17
B Out
18
V
IN
19
Shutdown
20
ELECTRICAL CHARACTERISTICS
(Unless otherwise stated, these specifications apply for T
A
=-55°C to +125°C for
UC1846/UC1847
PARAMETER
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability
Total Output Variation
Output Noise Voltage
Long Term Stability
T
J
=25°C, I
O
=1mA
V
IN
=8V to 40V
I
L
=1mA to 10mA
Over Operating Range, (Note 2)
Line, Load, and Temperature (Note 2)
10Hz
≤
f
≤10kHz,
T
J
=25°C (Note 2)
T
J
=125°C, 1000 Hrs. (Note 2)
-10
5.00
100
5
-45
-10
5.05
5.10
5
3
0.4
5.20
4.95
100
5
-45
5.15
20
15
5.00
5.10
5
3
0.4
5.25
5.20
20
15
TEST CONDITIONS
UC2846/UC2847
MIN.
TYP.
MAX.
UC1846/7; -40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7;
V
IN
=15V, R
T
=10k, C
T
=4.7nF, T
A
=T
J
.)
UC3846/UC3847
MIN.
TYP.
MAX. UNITS
V
mV
mV
mV/°C
V
µV
mV
mA
Short Circuit Output Current V
REF
=0V
2
TI [ TEXAS INSTRUMENTS ]
