Fairchild Semiconductor KA350 Datasheet

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KA350

3-Terminal 3A Positive Adjustable Voltage
Regulator

Features

• Output adjustable betwe en 1.2V an d 33V

• Guaranteed 3A output current

• Internal thermal over load protection

• Load regulation (Typ: 0.1%)

• Line regulation (Typ: 0.015%/V)

• Internal short circuit current limit

• Output transistor safe area compensation

Internal Block Diagram

Description

The KA350 is an adjustable 3-terminal positive voltage
regulator capable of supplying in excess of 3.0 A over an
output voltage range of 1.2V to 33 V

TO-220

1

1. Adj 2. Output 3. Input

©2001 Fairchild Semiconductor Corporation

Rev. 1.0.0

KA350

Absolute Maximum Ratings

Parameter Symbol Value Unit

Input Output Voltage Differential V
Lead Temperature (Soldering, 10sec) T

I

LEAD

Power Dissipation P
Operating Temperature Range T
Storage Temperature Range T

- V

D
OPR
STG

O

35 V

300 °C

Internally limited -

0 ~ +125 °C

-65 ~ +150 °C

Electrical Characteristics

(VI-VO=5V, IO=1.5A, TJ=0°C to + 125°C; P

D

≤

P

, unless otherwise specified)

DMAX

DC

Parameter Symbol

Line Regulation (Note1) Rline T

Load Regulation (Note1)

Adjustment Pin Current I
Adjustment Pin Current

Change
Thermal Regulation REG
Reference Voltage V

Rload

ADJ

∆I

ADJ

REF

T

= +25°C, 3V ≤ VI -V

A

T

= +25

A

V

≤ 5V

O

V

≥ 5V

O

3V ≤ VI -V
10mA ≤ I

Pulse = 20ms, TA =+ 25°C - 0.002 - %/W
3V ≤ VI -V

Line Regulation Rline 3.0V ≤ V

Load Regulation

Rload

Temperature Stability ST
Maximum Output

Current
Minimum Load Current I

RMS Noise, %of V

OUT

Ripple Rejection

Long-Term Stability

I

o(MAX)

L(MIN)VI

V

RR

ST

10mA ≤ I
V

≤ 5.0V

O

V

≥ 5.0V

O

TJ = 0°C to + 125°C-1.0-%

T

VI -V

O

-VO = 30V, P

V

I

-VO = 35V - 3.5 10 mA

10Hz ≤ f ≤ 10KHz, TA= +25

N

V

= 10V, f = 120Hz,

O

C

= 0

ADJ

C

= 10µF66

ADJ

T

=+125

J

Conditions

°C, 3V ≤ V

≤ 35V,

O

≤ 3A, PD ≤ P

o

≤ 35V, 10mA ≤ I

O

≤ 35V - 0.02 0.07 %/W

I -VO

≤ 3.0A

O

≤ 10V, PD ≤ P

≤ P

D

°C

Min. Typ. Max. Unit

≤ 35V - 0.015 0.03 %/V

O

≤ 35V

I -VO

-5

0.1250.5

- - 50 100 µA

0.2 5.0 µA

MAX

O

≤ 3A,P

≤ 30W 1.2 1.25 1.30 V

D

-

-20

0.3701.5

MAX

MAX,TA

= +25°C 0.25 1.0 - A

°C - 0.003 - %/V

3.0 4.5 - A

65

-dB

80

0.3 1 %/

­1000HR

mV

%

mV

%

o

dB

Note:

1. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken
into account separately. Pulse testing with low duty cycle is used.

2

Typical Perfomance Characteristics

KA350

Figure 1. Load Regulation

Figure 3. Adjustment Pin Current

Figure 2. Current Limit

Figure 4. Dropout Voltage

Figure 5. Temperature Stability

Figure 6. Minimum Load Current

3