
UC1835
UC1836
UC2835
UC2836
UC3835
UC3836
SOIC-16 (TOP VIEW)
DW Package
CONNECTION DIAGRAMS
PACKAGE PIN FUNCTION
FUNCTION
PIN
N/C
1
+VIN
2
+VIN
3
N/C
4
Compensation/
Shutdown
5
N/C
6
Ground
7
N/C
8
N/C
9
Driver Source
10
N/C
11
VOUT Sense
12
N/C
13
N/C
14
Driver Sink
15
N/C
16
Current Limit (-)
17
N/C
18
Sense Resistor Out
19
Sense Resistor Out
20
DIL-8, SOIC-8 (TOP VIEW)
N or J Package, D Package
PLCC-20, LCC-20
(TOP VIEW)
Q, L Packages
Input Supply Voltage (+VIN) . . . . . . . . . . . . . . . . –1.0V to + 40V
Driver Output Current (Sink or Source) . . . . . . . . . . . . . 600mA
Driver Source to Sink Voltage . . . . . . . . . . . . . . . . . . . . . + 40V
Maximum Current Through Sense Resistor. . . . . . . . . . . . . . 4A
VOUT Sense Input Voltage . . . . . . . . . . . . . . . . . . –.3V to + 40V
Power Dissipation at TA = 25°C (Note 2) . . . . . . . . . . . 1000mW
Power Dissipation at TC = 25°C (Note 2) . . . . . . . . . . . 2000mW
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.
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, specifications hold for TA = 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, +VIN = 6V, Driver Source= 0V, Driver Sink = 5V, TA = TJ.
PARAMETER
TEST CONDITIONS
MIN.
TYP.
MAX. UNITS
Input Supply
Supply Current
+VIN = 6V
2.75
4.0
mA
+VIN = 40V
3.75
6.0
mA
UVLO Threshold
+VIN Low to High, VOUT Sense = 0V
3.9
4.4
4.9
V
Threshold Hysteresis
0.1
0.35
V
Reverse Current
+VIN = -1.0V, Driver Sink Open
6.0
20
mA
Regulating Voltage and Error Amplifier (UC1835 Family Only)
Regulating Level at VOUT Sense (VREG)
Driver Current = 10mA, TJ = 25°C
4.94
5.0
5.06
V
Over Temperature
4.9
5.1
V
Line Regulation
+VIN = 5.2V + 35V
15
40
mV
Load Regulation
Driver Current = 0 to 250mA
6.0
25
mV
Bias Current at VOUT Sense
VOUT Sense = 5.0V
75
125
210
A
Error Amp Transconductance
±100A at Compensation/Shutdown Pin
0.8
1.3
2.0
mS
Maximum Compensation Output Current
Sink or Source, Driver Source Open
90
200
260
A
ABSOLUTE MAXIMUM RATINGS (Note 1)
2