ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (+V
IN
) . . . . . . . . . . . . . . . . –1.0V to + 40V
Driver Output Current (Sink or Source) . . . . . . . . . . . . . 600mA
Driver Source to Sink Voltage . . . . . . . . . . . . . . . . . . . . . + 40V
Maximum Current Through Sense Resistor. . . . . . . . . . . . . . 4A
V
OUT
Sense Input Voltage . . . . . . . . . . . . . . . . . . –.3V to + 40V
Power Dissipation at T
A
= 25°C (Note 2) . . . . . . . . . . . 1000mW
Power Dissipation at T
C
= 25°C (Note 2) . . . . . . . . . . . 2000mW
UC1835 UC1836
UC2835 UC2836
UC3835 UC3836
Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C
Note 1: Voltages are referenced to ground, (Pin 3). Currents are
positive into, negative out of, the specified terminals.
Consult Packaging Section of Databook for thermal
considerations and limitations of packages.
CONNECTION DIAGRAMS
DIL-8, SOIC-8 (TOP VIEW)
N or J Package, D Package
PLCC-20, LCC-20
(TOP VIEW)
Q, L Packages
PACKAGE PIN FUNCTION
FUNCTION
PIN
SOIC-16 (TOP VIEW)
DW Package
N/C
+V
IN
+V
IN
N/C
Compensation/
Shutdown
N/C
Ground
N/C
N/C
Driver Source
N/C
V
OUT
Sense
N/C
N/C
Driver Sink
N/C
Current Limit (-)
N/C
Sense Resistor Out
Sense Resistor Out
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ELECTRICAL CHARACTERISTICS:
Unless otherwise stated, specifications hold for T
A
= 0°C to + 70°C for the
UC3835/6, –25°C to + 85°C for the UC2835/6, and –55°C to +125°C for the
UC1835/6, +V
IN
= 6V, Driver Source= 0V, Driver Sink = 5V, T
A
= T
J
.
PARAMETER
Input Supply
Supply Current
TEST CONDITIONS
+V
IN
= 6V
+V
IN
= 40V
+V
IN
Low to High, V
OUT
Sense = 0V
MIN.
TYP.
2.75
3.75
4.4
0.1
6.0
5.0
15
6.0
125
1.3
200
MAX. UNITS
4.0
6.0
4.9
0.35
20
5.06
5.1
40
25
210
2.0
260
mA
mA
V
V
mA
V
V
mV
mV
µA
mS
µA
UVLO Threshold
Threshold Hysteresis
Reverse Current
+V
IN
= -1.0V, Driver Sink Open
Regulating Voltage and Error Amplifier
(UC1835 Family Only)
Driver Current = 10mA, T
J
= 25°C
Regulating Level at V
OUT
Sense (V
REG
)
Over Temperature
Line Regulation
+V
IN
= 5.2V + 35V
Load Regulation
Driver Current = 0 to 250mA
V
OUT
Sense = 5.0V
Bias Current at V
OUT
Sense
Error Amp Transconductance
±100µA
at Compensation/Shutdown Pin
Maximum Compensation Output Current
Sink or Source, Driver Source Open
3.9
4.94
4.9
75
0.8
90
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