SPX29150T-L-5-0/TR Exar Corporation, SPX29150T-L-5-0/TR Datasheet - Page 7

• Manufacturer Part Number: SPX29150T-L-5-0/TR
• Description: 1.5A Low Dropout Voltage Regulator
• Manufacturer: Exar Corporation
• Series: -r

Specifications of SPX29150T-L-5-0/TR

• Regulator Topology: Positive Fixed
• Voltage - Output: 5V
• Voltage - Input: Up to 16V
• Voltage - Dropout (typical): 0.39V @ 1.5A
• Number Of Regulators: 1
• Current - Output: 1.5A
• Current - Limit (min): 1.7A
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-4, D²Pak (3 leads + Tab), TO-263AA
• Number Of Outputs: 1
• Polarity: Positive, Negative, Reverse
• Input Voltage Max: 16 V
• Output Voltage: 5 V
• Output Type: Adjustable
• Dropout Voltage (max): 390 mV
• Output Current: 1.5 A
• Load Regulation: 0.2 % to 1 %
• Voltage Regulation Accuracy: 1 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The SPX29150/51/52/53 incorporates pro-
tection against over-current faults, reversed
load insertion, over temperature operation,
and positive and negative transient volt-
ages.
Thermal Considerations
Although the SPX29150/51/52/53 offers
limiting circuitry for overload conditions, it is
still necessary to insure that the maximum
junction temperature is not exceeded in the
application. Heat will flow through the lowest
resistance path, the junction-to-case path.
In order to insure the best thermal flow of
the component, proper mounting is required.
Consult the heatsink manufacturer for ther-
mal resistance and heat sink design.
TO-220 Design Example:
Assume that V
1.5A, T
and θ
T
θ
tance
θ
θ
The power calculated under these condi-
tions is:
P
as
And the junction temperature is calculated
V
REV B 06/05/08
A
HA
CH
JC
6.8µF
D
IN
Figure 19. Fixed Output Linear Regulator
= (V
= heatsink to ambient thermal resis-
= case to heatsink thermal resistance
= junction to case thermal resistance
= ambient temperature,
JC
+
A
IN
= 3C°/W, where:
T
= 50°C, θ
J
– V
= T
OUT
A
IN
+ P
) * I
SPX29150
= 10V, V
H
D
OUT
= 1°C/W, θ
* (θ
= 7.5W.
HA
OUT
+ θ
SP29150/51/52/53 1.5A Low Dropout Voltage Regulator
CH
= 5V, I
CH
+
= 2°C/W,
+ θ
10µF
OUT
JC
) or
V
OUT
=
7
Reliable operation is insured.
Capacitor Requirements
The output capacitor is needed to insure
stability and minimize the output noise. The
value of the capacitor varies with the load.
However, a minimum value of 10µF alumi-
num capacitor will guarantee stability over all
load conditions. A tantalum capacitor is rec-
ommended if a faster load transient response
is needed. If the power source has a high
AC impedance, a 0.1µF ceramic capacitor
between input & ground is recommended.
The output capacitors maximum ESR value
for stable operation is 0.33ohms.
Minimum Load Current
To ensure proper behavior of the regulator
under light loads, a minimum load of 5mA
for SPX29150/51/52/53 is required.
Typical Application Circuits
Figure 19 represents a typical fixed output
regulator. Figure 20 represents an adjustable
output regulator. The values of R1 and R2
set the output voltage value as follows: V
=V
10kΩ is recommended for R2 with a range
between 10kΩ and 47kΩ.
Figure 20. Adjustable Output Linear Regulator
V
REF
IN
6.8µ F
* [1 + (R1/R2)]. A minimum value of
T
+
J
= 50 + 7.5 * (1+2+3) = 95°C
APPLICATION INFORMATION
1
2
GND
SPX29152
3
© Copyright 2008 Exar Corporation
5
ADJ
4
R1
R2
+ 10µ F
V
OUT
OUT