ANPEC APL1541-KC-TU, APL1541-KC-TRL, APL1541-KC-TR, APL1541-33KC-TUL, APL1541-33KC-TU Datasheet

APL1541

1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 3.3V

Features

••

•

Guaranteed Output Voltage Accuracy within 2%

••

•

Fast Transient Response

••

•

Guaranteed Dropout Voltage at Multiple Cur-

••

rents

••

•

Load Regulation : 0.1% Typ.

••

•

Line Regulation : 0.03% Typ.

••

• Low Dropout Voltage : 1.1V Typ. at I

••

• Current Limit : 1A Typ. at T

••

• On-Chip Thermal Limiting : 150 °C Typ.

••

• Adjustable Output : 1.25~7.75V

••

• Standard 8-pin SO Power Package

••

=125 °C

J

OUT

=1A

Applications

General Description

The APL1541 is a low dropout three-terminal adjustable regulators with 1A output current capability. In order to obtain lower dropout voltage and faster transient response, which is critical for low voltage applications , the APL1541 has been optimized.

The device is available in an adjustable version and fixed output voltages of 3.3V, the output available voltage range is from 1.25~7.75V with an input supply below 12V. Dropout voltage is guaranteed at a maximum of 1.3V at 1A.

Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that would create excessive junction temperatures.

The APL1541 is available in the industry standard 8pin SO power package which can be used in applications where space is limited.

••

• Peripheral Cards

••

• Active SCSI Terminators

••

• Low Voltage Logic Supplies

••

• Post Regulator for Switching Power Supply

••

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright  ANPEC Electronics Corp. Rev. A.2 - Oct., 2003

Pin Description

18

NC

ADJ/GND

2

APL1541-33

3

IN

V

4

NC

Front View for SO - 8

OUT

V

7

OUT

V

6

OUT

V

5

OUT

V

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APL1541

Ordering and Marking Information

APL1541-

APL1541 XXXXX

Lead Free Code Handling Code Temp. R ange

Package Code Voltage Code

XXXXX - Date C od e

Package Code

K : SOP-8

Temp. R ange

C : 0 to 70 C

Handling Code

TU : Tube TR : Tape & Reel

Voltage Code

33: 3.3V Blank : Adjus table Ve rsion Lead Free Code L : Lead Free Device Blank : Orginal Device

APL1541- 33 :

°

APL1541

XXXXX33

XXXXX - Date Code

Absolute Maximum Ratings

Symbol Parameter Rating Unit

V

I

T

J

T

STG

T

L

Input Voltage 13.2 Operating Junction Temperature Range

Control Section Power Transistor

0 to 125 0 to 150

Storage Temperature Range -65 to +150 Lead Temperature (Soldering, 10 second) 260

V

C

°

C

°

C

°

Electrical Characteristics

Symbol Parameter Test Conditions

V

REF

APL1541

Output Voltage

Reference Voltage

V

OUT

APL1541-33

Line Regulation

REG

LINE

APL1541

APL1541-33

Load Regulation

REG

LOAD

APL1541

APL1541-33

Dropout Voltage

V

D

Copyright  ANPEC Electronics Corp. Rev. A.2 - Oct., 2003

10mA≤ I T

=0~125°C

J

T

=0~125°C,

J

0≤ I

OUT

T

=0~125°C

J

I

10mA, 1.5V≤(V

=

OUT

I

0A, 4.75V≤(V

=

OUT

T

=0~125°C

J

(V

IN -VOUT

1A, 1.4V≤(V

≤

OUT

1A, 4.75V≤V

≤

=3V, 0≤ I

)

VIN=4.75V, 0≤ I I

=100mA ,T

OUT

I

=500mA ,T

OUT

I

OUT

=1A ,T

=0~125°C

J

IN

IN -VOUT

≤

OUT

1A ,(note 1)

≤

OUT

=0~125°C

J

=0~125°C

J

IN -VOUT

12V,

≤

)

≤7.75V, (note 1)

)

1A ,(note 1)

≤9.75V,

)

≤9.75V, (note1)

APL1541

Min. Typ. Max.

Unit

1.225 1.250 1.275 V

3.235 3.300 3.365 V

0.03 1

0.1 1

0.2 6

0.4

10

mV

11.1

1.05

1.1

1.2

1.3

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%

V

APL1541

Electrical Characteristics Cont.

Symbol Parameter Test Conditions

I

LIMIT

I

∆

Current Limit Adjust Pin Current

ADJ

Adjust Pin Current Change

I

ADJ

APL1541

(V (V

T

1.4V≤(V

)=5V, TJ=25°C

IN -VOUT

=3V, I

)

IN -VOUT

0~125°C, 10mA≤ I

=

J

IN -VOUT

=10mA, TJ=0~125°C

OUT

1A,

≤

OUT

≤9.75V

)

APL1541

Min. Typ. Max.

1

60 120

0.2 5

Unit

A

µ

A

µ

APL1541

Minimum Load Current

I

O

=0~125°C, (V

T

J

)=9.75V, (note 3)

IN -VOUT

1.7 mA

APL1541

PSRR

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Load line regulations are measured at a constant junction temperature by low duty cycle pulse testing. Note 2: Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/ output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. Note 3: Minimum load current is defined as the minimum output current required to maintain regulation.

Ripple Rejection F

Thermal

T

R

Regulation Temperature

T

S

Stability Long -Term

L

S

Stability RMS Output

V

N

Noise Thermal

θ

th

Resistance Quiescent Current

I

q

APL1541-33

=120Hz, V

RIPPLE

(V

IN -VOUT

T

=25°C, 30ms Pulse

J

T

J

=25°C,10Hz≤F≤10kHz,

T

J

(% of V

=3V, TJ=0~125°C

)

=125°C,1000Hrs.

)

OUT

Junction to Case, at Tab Junction to ambient

T

=0~125°C,

J

12V

V

≤

IN

RIPPLE

=1V

P-P,

60 75

0.01 0.02 %/ W

0.5

0.3 %

0.003 % 15

50

5.5 10

dB

%

C/ W

°

mA

Copyright  ANPEC Electronics Corp. Rev. A.2 - Oct., 2003

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APL1541

Application Circuits

Simple 5V to 3.3V Regulation

APL15 41-33

IN

=5V

V

10uF

IN

GND

Improving Ripple Rejection

APL15 41

IN

V

10uF

IN

OUT

ADJ

OUT

R2

365

1%

1.25V to 7.75V Adjustable Regulator

APL15 41

IN

V

10uF

OUT

=3.3V

V

10uF

1*

C

IN

ADJ

R2 1K

OUT

121

R1

OUT

V

Ω

100uF

2*

C

*Needed if device is far from filter capacitors

VOUT = 1.250V x

R1+R2 R1

5V Regulator with Shutdown

APL15 41

IN

OUT

V

R1

Ω

121

Ω

C1

10uF

150uF

V

TTL

10uF

1K

IN

1K

ADJ

OUT

121

365Ω

1%

5V

Ω

100uF

*C1 improves ripple rejection.XC should be approximately equal to R1 at ripple frequency

Copyright  ANPEC Electronics Corp. Rev. A.2 - Oct., 2003

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