Datasheet

ABSOLUTE MAXIMUM RATINGS (Note 1, 2)
Input Voltage (+VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +40V
Collector Supply Voltage (+V
C) . . . . . . . . . . . . . . . . . . . . . +40V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +5.5V
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +V
IN
Source/Sink Load Current (each output) . . . . . . . . . . . . . 200mA
Reference Load Current. . . . . . . . . . . . . . . . . . . . . . . . . . . 50mA
Logic Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15mA
Power Dissipation at T
A = +25°C (Note 2) . . . . . . . . . . 1000mW
Power Dissipation at T
C = +25°C (Note 2). . . . . . . . . . 3000mW
Operating Junction Temperature . . . . . . . . . . . . . . . . . . +150°C
Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C
Lead Temperature (soldering, 10 seconds) . . . . . . . . . . +300°C
Note 1: Values beyond which damage may occur.
Note 2: Consult packaging section of databook for thermal
limitations and considerations of package.
CONNECTION DIAGRAMS
UC1526
UC2526
UC3526
DIL-18, SOIC-18 (TOP VIEW)
J or N Package, DW Package
RECOMMENDED OPERATING CONDITIONS (Note 3)
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +8V to +35V
Collector Supply Voltage . . . . . . . . . . . . . . . . . . . +4.5V to +35V
Sink/Source Load Current (each output) . . . . . . . . . 0 to 100mA
Reference Load Current . . . . . . . . . . . . . . . . . . . . . . 0 to 20mA
Oscillator Frequency Range . . . . . . . . . . . . . . . . 1Hz to 400kHz
Oscillator Timing Resistor . . . . . . . . . . . . . . . . . . . 2k to 150k
Oscillator Timing Capacitor . . . . . . . . . . . . . . . . . . . 1nF to 20µF
Available Deadtime Range at 40kHz. . . . . . . . . . . . . 3% to 50%
Operating Ambient Temperature Range
UC1526 . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +125°C
UC2526 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25°C to +85°C
UC3526 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0°C to +70°C
Note 3: Range over which the device is functional and
parameter limits are guaranteed.
PACKAGE PIN FUNCTION
FUNCTION PIN
N/C 1
+Error 2
-Error 3
Comp. 4
CSS 5
Reset
______
6
- Current Sense 7
+ Current Sense 8
Shutdown
_________
9
RTIMING 10
CT 11
RD 12
Sync 13
Output A 14
VC 15
N/C 16
Ground 17
Output B 18
+VIN 19
VREF 20
PLCC-20, LCC-20
(TOP VIEW)
Q and L Packages
ELECTRICAL CHARACTERISTICS:
PARAMETER TEST CONDITIONS UC1526 / UC2526 UC3526 UNITS
MIN TYP MAX MIN TYP MAX
Reference Section (Note 4)
Output Voltage T
J = + 25°C 4.95 5.00 5.05 4.90 5.00 5.10 V
Line Regulation +V
IN = 8 to 35V 10 20 10 30 mV
Load Regulation I
L = 0 to 20mA 10 30 10 50 mV
Temperature Stability Over Operating T
J 15 50 15 50 mV
Total Output
Voltage Range
Over Recommended
Operating Conditions
4.90 5.00 5.10 4.85 5.00 5.15 V
Short Circuit Current V
REF = 0V 25 50 100 25 50 100 mA
Under -Voltage Lockout
RESET
_______
Output Voltage V
REF = 3.8V 0.2 0.4 0.2 0.4 V
V
REF = 4.8V 2.4 4.8 2.4 4.8 V
Note 4: I
L
= 0mA.
+VIN = 15V, and over operating ambient temperature, unless otherwise
specified, TA = TJ.
2