SPX5205M5-L-3-3 Exar Corporation, SPX5205M5-L-3-3 Datasheet - Page 6
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SPX5205M5-L-3-3
Manufacturer Part Number
SPX5205M5-L-3-3
Description
IC REG LDO 3.3V 150MA LN SOT23-5
Manufacturer
Exar Corporation
Datasheet
1.SPX5205M5-L.pdf
(8 pages)
Specifications of SPX5205M5-L-3-3
Package / Case
SOT-23-5, SC-74A, SOT-25
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 16V
Voltage - Dropout (typical)
0.21V @ 150mA
Number Of Regulators
1
Current - Output
150mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
16 V
Output Voltage
2.503 V to 36 V
Output Type
Adjustable, Fixed
Dropout Voltage (max)
0.05 V at 100 uA
Output Current
150 mA
Line Regulation
0.1 % / V
Load Regulation
0.2 %
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
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
1016-1251
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SPX5205M5-L-3-3/TR
Manufacturer:
EXAR
Quantity:
10 000
Part Number:
SPX5205M5-L-3-3/TR
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
SPX5205
150mA, Low-Noise LDO Voltage Regulator
The SPX5205 requires an output capacitor for
device stability. Its value depends upon the
application circuit. In general, linear regulator
stability decreases with higher output currents.
In applications where the SPX5205 is putting
out less current, a lower output capacitance may
be sufficient. For example, a regulator sourcing
only 10mA, requires approximately half the
capacitance as the same regulator sourcing
150mA.
Bench testing is the best method for determining
the proper type and value of the capacitor since
the high frequency characteristics of electro-
lytic capacitors vary widely, depending on type
and manufacturer. A high quality 2.2μF alumi-
num electrolytic capacitor works in most appli-
cation circuits, but the same stability often can
be obtained with a 1μF tantalum electrolytic.
With the SPX5205 adjustable version, the mini-
mum value of output capacitance is a function of
the output voltage. The value decreases with
higher output voltages, since closed loop gain is
increased.
Typical Applications Circuits
A 10nF capacitor on BYP pin will significantly
reduce output noise but it may be left uncon-
nected if the output noise is not a major concern.
The SPX5205 start-up speed is inversely pro-
Figure 1. Typical Adjustable Output Voltage.
V
IN
+
GND
Hi-ON
Lo-OFF
EN
1
3
2
TOP View
SPX5205
6
(Optn)
BYP
5
portional to the size of the BYP capacitor. Ap-
plications requiring a slow ramp-up of the out-
put voltage should use a larger C
if a rapid turn-on is necessary, the BYP capaci-
tor can be omitted.
The SPX5205’s internal reference is available
through the BYP pin.
The Typical Application Circuit shown on page
1 represents a SPX5205 standard application
circuit. The EN (enable) pin is pulled high
(>2.0V) to enable the regulator. To disable the
regulator, EN < 0.4V.
The SPX5205 in Figure 1 illustrates a typical
adjustable output voltage configuration. Two
resistors (R1 and R2) set the output voltage. The
output voltage is calculated using the formula:
R2 must be > 10 k
should be between 22 k and 47k . A capacitor
placed between adjustable and ground will pro-
vide improved noise performance.
4
ADJ
V
OUT
APPLICATION INFORMATION
= 1.235V x ( 1 + R1/R2)
R2
R1
and for best results, R2
+
V
BYP
OUT
. However,
REV. H