UC3836DTR ,High Efficiency Regulator ControllerBLOCK DIAGRAMNote: Pin numbers refer to 8-Pin DIL Package8/94UC1835 UC1836UC2835 UC2836UC3835 UC383 ..
UC3838ADW ,Magnetic Amplifier Controller
UC3838ADW ,Magnetic Amplifier Controller
UC3840 ,PROGRAMMABLE, OFF-LIINE, PWM CONTROLLERfeatures of these devices in-
clude a 1% accurate reference, provision for slow,
turn-on and duty ..
UC3840J ,32V; 1000mW; programmable off-line PWM controllerBLOCK DIAGRAM
_ _ v, - _-__----- y,
®SENSE
RAMP
GEN "_'" A (Wsesste
- (sy
mic, 'Y------ - ..
UC3840N ,32V; 1000mW; programmable off-line PWM controllertt
I ALL CONTROL, DRIVING, MONITORING, AND
PROTECTION FUNCTIONS INCLUDED
I LOW-CURRENT, OFF- ..
UML1N , Low-frequency transistor
UML2N , Low-frequency transistor (isolated transistor and diode)
UML2N , Low-frequency transistor (isolated transistor and diode)
UML4 N , General purpose transistor (isolated transistor and diode)
UML6 N , General purpose transistors (Isolated transistor and diode)
UML6N , General purpose transistors (Isolated transistor and diode)
uc3836-UC3836D-UC3836DTR
High Efficiency Regulator Controller
FEATURES Complete Control for a High Current,
Low Dropout, Linear Regulator Fixed 5V or Adjustable Output Voltage Accurate 2.5A Current Limiting with
Foldback Internal Current Sense Resistor Remote Sense for Improved Load
Regulation External Shutdown Under-Voltage Lockout and Reverse
Voltage Protection Thermal Shutdown Protection 8 Pin Mini-Dip Package
(Surface Mount also Available)
DESCRIPTIONThe UC1835/6 families of linear controllers are optimized for the de-
sign of low cost, low dropout, linear regulators. Using an external pass
element, dropout voltages of less than 0.5V are readily obtained.
These devices contain a high gain error amplifier, a 250mA output
driver, and a precision reference. In addition, current sense with fold-
back provides for a 2.5A peak output current dropping to less than
0.5A at short circuit.
These devices are available in fixed, 5V, (UC1835), or adjustable,
(UC1836), versions. In the fixed 5 volt version, the only external parts
required are an external pass element, an output capacitor, and a com-
pensation capacitor. On the adjustable version the output voltage can
be set anywhere from 2.5V to 35V with two external resistors.
Additional features of these devices include under-voltage lockout for
predictable start-up, thermal shutdown and short circuit current limiting
to protect the driver device. On the fixed voltage version, a reverse
voltage comparator minimizes reverse load current in the event of a
negative input to output differential.
High Efficiency Regulator Controller
BLOCK DIAGRAM
UC1835 UC1836
UC2835 UC2836
UC3835 UC3836
