SPX2815(2004) Просмотр технического описания (PDF) - Signal Processing Technologies

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SPX2815
(Rev.:2004)

1.5A Low Dropout Voltage Regulator

Signal Processing Technologies 

TYPICAL PERFORMANCE CHARACTERISTICS

3.325

3.320

3.315

3.310

3.305

3.300

4.5

6.5

8.5 10.5 12.5 14.5

Vin (V)

Figure 1. Line Regulation for SPX2815U-3.3; IOUT=10mA

1.275

1.27

1.265

1.26

1.255

1.25

1.245

1.25v Adj

1.24

1.235

1.23

1.225

-50 -30 -10 10 30 50 70 90 110 130

Temp (C)

Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA

2.55

2.54

2.5v Adj

2.53

2.5v Fixed

2.52

2.51

2.5

2.49

2.48

2.47

2.46

2.45

-50 -30 -10 10 30 50 70 90 110 130

Temp (C)

Figure 3. VIN=4.0V, IOUT=10mA

3.38

3.36

3.3v Adj

3.3v Fixed

3.34

3.32

3.3

3.28

3.26

-50 -30 -10 10 30 50 70 90 110 130

Temp (C)

Figure 4. VIN=5.0V, IOUT=10mA

Output Capacitor

To ensure the stability of the SPX2815, an

output capacitor of at least 10µF (ceramic or

tantalum) or 22µF (aluminum) is required. The

value may change based on the application

requirements of the output load or temperature

range. The value of ESR can vary based on the

type of capacitor used in the applications to

guarantee stability. The recommended value

for ESR is 0.5Ω or less. A larger value of output

capacitance (up to 100µF) can improve the load

transient response.

Soldering Methods

The SPX2815 die is attached to the heatsink lead

which exits opposite the input, output, and ground

pins.

Thermal Characteristics

The SPX2815 features the internal thermal lim-

iting to protect the device during overload con-

ditions. Special care needs to be taken during

APPLICATION INFORMATION

continuous load conditions such that the maxi-

mum junction temperature does not exceed

125°C. Thermal protection is activated at >179°C

and deactiviated at <165 °C.

The thermal interaction from other components

in the application can effect the thermal resis-

tance of the SPX2815. The actual thermal

resistance can be determined with experimenta-

tion.

SPX2815 power dissipation is calculated as

follows:

PD = (VIN - VOUT)(IOUT)

Maximum Junction Temperature range:

TJ = TA(max) + PD* thermal resistance

(junction-to-ambient)

Maximum junction temperature must not ex-

ceed the 125°C.

Date: 5/17/04

SPX2815 1.5A Low Dropout Voltage Regulator

3

© Copyright 2004 Sipex Corporation

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