Fairchild Semiconductor KA33VBU Datasheet

KA33V

Voltage Stabilizer

www.fairchildsemi.com

Features

• Low Temperature Coefficient

• Low Dynamic Resistance

• T ypical Reference Voltage of 33V

Schematic Diagram

Description

The KA33V is a monolithic integrated voltage stabilizer especially designed as voltage supplier for electronic tuners.

TO-92

1

1. Anode 2. Cathode

R4

D1 D2

D3

D4

D5

●

R3

●

Q3

●

R2

●

Q2

●

R1

●

2 Cathode

1 Anode

Rev. 1.0.1

KA33V

Absolute Maximum Ratings (T

A= 25°°°°C)

Parameter Symbol Value Unit

Zener Current I Power Dissipation (T

= 75°C) P

A

Operating Ambient Temperature Range T Storage Temperature Range T

Z

D OPR STG

10 mA

200 mW

-20 ~ 75 °C

-40 ~ 125 °C

Electrical Characteristics (TA = 25°°°°C)

Parameter Symbol Conditions Min. Typ. Max. Unit

Stabilized Voltage V Stabilized Voltage-Temperature Drift ∆V Dynamic Resistance R

Z

IZ = 5mA 31 35 V

Z

I

= 5mA

Z

/∆T

T

= -20 to 75°C

A

IZ = 5mA, f = 1KHz - 10 25 -

Z

-1 0 1 mV/°C

2

Measuring Ci rcuits

KA33V

IZ = 5mA

A

●

RB

2

KA33V

EB

1

Figure 1. Measuring Circuit for Stabilized Voltage V

Iz

RB

EB

●●●●

A

2

C

0.1μF

●

KA33V

1

●

+

50μF 100

VV2

VV1

●

v

IAC =

Volt Meter

Z

~

Iz 10

f = 1KHz

Fig. 3

IZ

Vz

1

VV

rZ =

0.5mA

1

0.5mA

5mA

W1

Figure 2. Measuring Cir cuit for Dynamic Resistance

3