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)

DESCRIPTION

The UC1835/6 families of linear controllers are optimized for the design

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 foldback

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 compensation

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.