APE1086P - Advanced Power Electronics Corp. USA

1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

APE1086

This datasheet contains new product information. Advanced Power Electronics Corp. reserves the rights to modify the product specification without notice. No liability is assumed as

a result of the use of this product. No rights under any patent accompany the sale of the product.

200313072-1/6

 Features

• 3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V,

3.3V, 5.0V

• 1.4V Maximum Dropout at Full Load Current

• Fast Transient Response

• Built-in Thermal Shutdown

• Output Current Limiting

RoHS Compliant

 General Description

APE1086 is a low dropout positive adjustable or

fixed-mode regulator with minimum of 1.5A output

current capability. The product is specifically

designed to provide well-regulated supply for low

voltage IC applications such as high-speed bus

termination and low current 3.3V logic supply.

APE1086 is also well suited for other applications

such as VGA cards. APE1086 is guaranteed to have

<1.4V dropout at full load current making it ideal to

provide well-regulated outputs of 1.25V to 5.0V with

4.7 to 12V input supply by different output voltage.

 Ordering Information

APE1086

Low Dropout Regulator Package Vout

H : TO252-3L

S : TO263-3L

P : TO220-3L

Blank : Adj

15 = 1.5V

18 = 1.8V

25 = 2.5V

33 = 3.3V

50 = 5.0V

 Typical Application

5V to 3.3V Fixed Mode Regulator Adjustable Regulator

100uF

3.3V/1.5A

Tab is Vout

Vin

Vout

GND

100uF

121

100uF

2.5V/1.5A

Tab is Vout

Vin

Vout

100uF

Adj

VOUT=Vref (1+R2/R1)

Ω

)

REFoR

(1VV +∗=

Note:

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1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

APE1086

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 Block Diagram

THERMAL

SHUTDOWN 1

2 Vout

Adj

(GND)

1.25V +

CURRENT

LIMIT

Vin

－

 Connection Diagram

3 PIN TO263 3 PIN TO252 3 PIN TO220

Vin

Vout

Tab is Vout

FRONT VIEW

Adj

(GND)

Vin

Vout

Adj

(GND)

Tab is Vout

FRONT VIEW

Tab is Vout

3Vin

Vout

FRONT VIEW

Adj

(GND)

 Pin Descriptions

NAME I/O PIN # FUNCTION

Adj

(GND) 1 Adjustable (Ground only for fixed mode)

Vout O 2

The output of the regulator. A minimum of 10uF capacitor must be

connected from this pin to ground to insure stability.

Vin I 3

The input pin of regulator. Typically a large storage capacitor is

connected from this pin to ground to insure that the input voltage does

not sag below the minimum dropout voltage during the load transient

response. This pin must always be 1.4V higher than Vout in order for

the device to regulate properly.

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1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

APE1086

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 Absolute Maximum Ratings

Symbol Parameter Rating Unit

Vin DC Supply Voltage -0.3 to 12 V

PD Power Dissipation Internally Limited

TST Storage Temperature -65 to +150 oC

TOP Operating Junction Temperature Range 0 to +150 oC

 Electrical Characteristics (Under Operating Conditions)

PARAMETER CONDITIONS MIN TYP MAX UNIT

Reference Voltage APE1086-Adj T

J=25oC,(VIN-VOUT)=1.5V,IO=10mA 1.225 1.250 1.275 V

APE1086-1.5

IOUT = 10mA, TJ = 25oC, 3V≦VIN≦12V 1.470 1.500 1.530 V

Output Voltage APE1086-1.8 IOUT = 10mA, TJ = 25oC, 3.3V≦VIN≦

12V 1.764 1.800 1.836 V

APE1086-2.5 IOUT = 10mA, TJ = 25oC, 4V≦VIN≦12V

2.450 2.500 2.550 V

APE1086-3.3 IOUT = 10mA, TJ = 25oC, 4.8V≦VIN≦

12V 3.235 3.300 3.365 V

APE1086-5.0 IOUT = 10mA, TJ = 25oC, 6.5V≦VIN≦

12V 4.900 5.000 5.100 V

Line Regulation APE1086-XX IO=10mA, VOUT+1.5V<VIN<12V - 0.2 0.5 %

APE1086-Adj VIN=3.3V, 0mA<Io<1.5A, TJ=25oC

(Note 1, 2) - - 1 %

APE1086-1.5 VIN=3V, 0mA<Io<1.5A, TJ=25oC

(Note 1, 2) - 12 15 mV

APE1086-1.8 VIN=3.3V, 0mA<Io<1.5A, TJ=25oC

(Note 1, 2) - 15 18 mV

APE1086-2.5 VIN=4V, 0mA<Io<1.5A, TJ=25oC

(Note 1, 2) - 20 25 mV

APE1086-3.3 VIN = 5V, 0≦IOUT≦1.5A, TJ=25oC ,

TJ=25oC (Note 1.2) - 26 33 mV

Load Regulation

APE1086-5.0 VIN = 8V, 0≦IOUT≦1.5A, TJ=25oC ,

TJ=25oC (Note 1.2) - 40 50 mV

Dropout Voltage

(VIN-VOUT)

APE1086-Adj/-2.5

/-3.3/-3.6/-5.0 IOUT = 1.5A, ∆VOUT=1%VOUT - 1.3 1.4 V

Current Limit APE1086-Adj/-2.5

/-3.3/-3.6/-5.0 (VIN-VOUT) = 5V 1. 6 - - A

Minimum Load Current APE1086-XX 0oC≦Tj≦125oC - 5 10 mA

Thermal Regulation TA=25℃, 30ms pulse - 0.008 0.04 %/W

F=120Hz,COUT=25uF Tantalum, IOUT=1.5A

Ripple Rejection APE1086-XX VIN=VOUT+3V - 60 70 dB

RMS Noise (% of VOUT) 10Hz ≤ f ≤ 10KHz - 0.003 - %

Temperature Stability IO=10mA - 0.5 - %

Thermal Resistance

Junction-to-Ambient

(No heat sink ;No air flow)

TO-252

TO-263

TO-220

101

- OC/W

Thermal Resistance

Junction-to-Case

TO-252: Control Circuitry/Power Transistor

TO-263: Control Circuitry/Power Transistor

TO-220: Control Circuitry/Power Transistor

0.65/2.7

- OC/W

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant

junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18” from the package.

Note 2:Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the difference in input and

output and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.

Note 3:Quiescent current is defined as the minimum output current required in maintaining regulation. At 12V input/output differential the device is

guaranteed to regulate if the output current is greater than 10mA.

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1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

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 Functional Description

Introduction

The APE1086 adjustable or fixed-mode Low Dropout

(LDO) regulator is a 3 terminal device which can

easily be programmed by internal mask change to

any voltages within the range of 1.25V to Vin-1.4V.

The APE1086 only needs 1.4V differential between

Vin and Vout to maintain output regulation. In

addition, the output voltage tolerances are also

extremely tight and they include the transient

response as part of the specification. For example,

Intel VRE specification calls for a total of +/- 100mV

including initial tolerance, load regulation and 0 to

1.5A load step.

The APE1086 is specifically designed to meet the

fast current transient needs as well as providing an

accurate initial voltage, reducing the overall system

cost with the need for fewer output capacitors.

Load Regulation

Since the APE1086 is only a 3 terminal device, it is

not possible to provide true remote sensing of the

output voltage at the load. But it can supply good

load regulation by internal feedback bypass the

external loss such as adjustable mode.

Stability

The APE1086 requires the use of an output capacitor

as part of the frequency compensation in order to

make the regulator stable. For most applications a

minimum of 10uF aluminum electrolytic capacitor

insures both stability and good transient response.

Thermal Design

The APE1086 incorporates an internal thermal

shutdown that protects the device when the junction

temperature exceeds the maximum allowable

junction temperature. Although this device can

operate with junction temperatures in the range of

150oC, it is recommended that the selected heat

sink be chosen such that during maximum

continuous load operation the junction temperature

is kept below the temperature.

Layout Consideration

The output capacitors must be located as close to

the Vout terminal of the device as possible. It is

recommended to use a section of a layer of the PC

board as a plane to connect the Vout pin to the

output capacitors to prevent any high frequency

oscillation that may result due to excessive trace

inductance.

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1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

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 Typical Performance Characteristics

Temperature (

Percent Change in Output Voltage vs Temperature

Output Voltage Change (%)

-50 -25 0 25 50 75 100 125 150

- 2

-1.5

- 1

-0.5

0. 5

1.5

Input Voltage (V)

Line Regulation

Output Voltage Deviation (%)

0.2

0.4

0.6

0.8

6 8 10 12

TIME (us)

Line Transient Response

Output Voltage Deviation (mV) Input Voltage (V)

-40

-20

5.5

6.5

7.5 Cin=1uF

Cout=10uF Tantalum

0 20 40 60 80 100 120 140 160 180 200

TIME (us)

Load Transient Response

Load Current (A) Output Voltage Deviation (mV)

010

20 30 40 50 60 70 80 90 100

-1

-20

-10

30 Cin=1uF

Cout=10uF Tantalum

Preload=100mA

Temperature (

Load Regulation vs Temperature

Output Voltage Deviation (%)

-25 0 25 50 75 100 125

- 1

-0.80

-0.40

-0.20

0.20

I load=1.5A

Output Current (A)

Dropout Voltage vs Output Current

Dropout Voltage (V)

0. 2

0. 4

0. 6

0. 8

1. 0

1. 2

1. 4

1. 6

1. 8

2. 0

Tj = 25

Tj = 125

0.25 0.5 0.75 1.0 1.25 1.5

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1.5A Low Dropout Positive Adjustable or Fixed-Mode Regulator

APE1086

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 Marking Information

Logo

Part Number

1086 for ADJ

1086-VV : 15 for 1.5V

18 for 1.8V

25 for 2.5V

33 for 3.3V

50 for 5V

Y: Year -"1": 2001 ~

WW: Xth week - 01~52

SSS: Sequence - 001~

( Top View)

(TO252-3L)

Logo

Part Number

1086-VV : 15 for 1.5V

18 for 1.8V

25 for 2.5V

33 for 3.3V

50 for 5V

Blank for ADJ

Y: Year -"1": 2001 ~

WW: Xth week - 01~52

SSS: Sequence - 001~

( Top View)

(TO220-3L / TO263-3L)

1086-VV

Y WW SSS

1086-VV

Y WW SSS

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