μPC2933A,2905A

Chapter Title

R03DS0029EJ0400 Rev.4.00

Page 3 of 12

Mar 16, 2011

Absolute Maximum Ratings (T

A = 25°C)

Rating

Parameter

Symbol

μ PC2933AHF, 2905AHF

μ PC2933AHB, 2905AHB

μ PC2933AT, 2905AT

Unit

Input Voltage

VIN

20

V

Internal Power Dissipation (TC = 25

°C)

Note

PT

15

10

W

Operating Ambient Temperature

TA

−30 to +85

°C

Operating Junction Temperature

TJ

−30 to +150

°C

Storage Temperature

Tstg

−55 to +150

°C

Thermal Resistance (junction to case)

Rth(J-C)

7

12.5

°C/W

Thermal Resistance (junction to ambient)

Rth(J-A)

65

125

°C/W

Note Internally limited. When the operating junction temperature rises above 150

°C, the internal circuit shuts down the

output voltage.

Caution Product quality may suffer if the absolute maximum rating is exceeded even momentarily for any

parameter. That is, the absolute maximum ratings are rated values at which the product is on the

verge of suffering physical damage, and therefore the product must be used under conditions that

ensure that the absolute maximum ratings are not exceeded.

Typical Connection

INPUT

CIN

PC2933A, 2905A

OUTPUT

COUT

D1

D2

μ

+

CIN

: 0.1

μF or higher. Be sure to connect CIN to prevent parasitic oscillation. Set this value according to the length

of the line between the regulator and the INPUT pin. Use of a film capacitor or other capacitor with first-rate

voltage and temperature characteristics is recommended.

If using a laminated ceramic capacitor, it is

necessary to ensure that CIN is 0.1

μF or higher for the voltage and temperature range to be used.

COUT

: 47

μF or higher. Be sure to connect COUT to prevent oscillation and improve excessive load regulation. Place

CIN and COUT as close as possible to the IC pins (within 1 to 2 cm). Also, use an electrolytic capacitor with low

impedance characteristics if considering use at sub-zero temperatures.

D1

: If the OUTPUT pin has a higher voltage than the INPUT pin, connect a diode.

D2

: If the OUTPUT pin has a lower voltage than the GND pin, connect a Schottky barrier diode.

Caution Make sure that no voltage is applied to the OUTPUT pin from external.