34063A Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – DC-TO-DC CONVERTER CONTROL CIRCUITS

34063A
DC-TO-DC CONVERTER CONTROL CIRCUITS
The 34063A is a monolithic control circuit containing the primary functions required for DC-to-DC converters.
These devices consist of an internal temperature compensated reference, comparator, controlled duty cycle
oscillator with an active current limit circuit, driver and high current output switch. This series was specifically
designed to be incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number
of external components.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
• Operation from 3.0 V to 40 V Input
• Low Standby Current
• Current Limiting
• Output Switch Current to 1.5 A
• Output Voltage Adjustable
• Frequency Operation to 100 kHz
• Precision 2% Reference
MAXIMUM RATINGS
Rating
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (Vpin 1 = 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 1)
Switch Current
Power Dissipation and Thermal Characteristics
Ceramic Package, U Suffix T_A = +25°C
Thermal Resistance
Plastic Package, P Suffix T_A = +25°C
Thermal Resistance
SOIC Package, D Suffix TA = +25°C
Thermal Resistance
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Symbol
V_CC
V_IR
V_C(switch)
V_E(switch)
V_CE(switch)
I_C(driver)
I_C(driver)
I_SW
P_D
R_θJA
P_D
R_θJA
P_D
R_θJA
TJ
T_A
Tstg
Value
Unit
40
Vdc
-0.3 to Vdc
+40
40
Vdc
40
Vdc
40
Vdc
40
Vdc
100
mA
1.5
A
1.25
W
100
°C/W
1.25
W
100
°C/W
625
mW
160
°C/W
+150
°C
0 to +70 °C
-65to+150 °C