62012 SY 20120207-S00003 No.A2086-1/4

http://onsemi.com

Semiconductor Components Industries, LLC, 2013

August, 2013

LA5797MC

Overview

The LA5797MC is a charge pump step-up power supply for Variable capacitance diodes.

Features

• By using charge pump, no coils are necessary.

• Time-base generator (140kHz) incorporated.

• Thermal shutdown circuit incorporated.

Specifications

Maximum Ratings at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Input voltage

VIN max

30

V

Allowable power dissipation

Pd max

Mounted on the specified board. *

0.75

W

Operating temperature

Topr

-25 to +90

°C

Storage temperature

Tstg

-40 to +150

°C

Junction temperature

Tjmax

150

°C

* Specified board: 114.3mm

× 76.1mm × 1.6mm, glass epoxy board.

Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.

Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,

high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.

Recommended Operating Conditions at Ta = 25

°C

Parameter

Symbol

Conditions

Ratings

Unit

Input voltage range

VIN

7.5 to 28

V

Monolithic Linear IC

Charge Pump Step-up Power Supply

for Variable Capacitance Diodes

Ordering number : ENA2086

Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating

Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.