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PDF SP6205 Data sheet ( Hoja de datos )
| Número de pieza | SP6205 | |
| Descripción | 300mA/500mA Low Noise CMOS LDO Regulators | |
| Fabricantes | Exar | |
| Logotipo |  |
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April 2012
SP6203 / SP6205
300mA/500mA Low Noise CMOS LDO Regulators
Rev. 2.0.0
GENERAL DESCRIPTION
The SP6203 and SP6205 are ultra low noise
CMOS LDOs with very low dropout and ground
current. The noise performance is achieved by
means of an external bypass capacitor without
sacrificing turn-on and turn-off speed critical
to portable applications. Extremely stable and
easy to use, these devices offer excellent
PSRR and Line/Load regulation. Target
applications
include
battery-powered
equipment such as portable and wireless
products. Regulators' ground current increases
only slightly in dropout. Fast turn-on/turn-off
enable control and an internal 30Ω pull down
on output allows quick discharge of output
even under no load conditions. Both LDOs are
protected with current limit and thermal
shutdown.
Both LDOs are available in fixed & adjustable
output voltage versions and come in an
industry standard 5-pin SOT-23 and small
2X3mm 8-pin DFN packages. For SC-70
100mA CMOS LDO, SP6213 is available.
TYPICAL APPLICATION DIAGRAM
APPLICATIONS
Battery-Powered Systems
Medical Equipments
MP3/CD Players
Digital Cameras
FEATURES
300mA/500mA Output Current
SP6203: 300mA – SP6205: 500mA
Low Dropout Voltage: 0.6Ω PMOS FET
2.7V to 5.5V Input Voltage
Fixed and Adjustable Output Voltage
Accurate Output Voltage: 2% over Temp.
67dB Power Supply Rejection Ratio
12μVRMS Low Output Noise
Unconditionally Stable with 2.2μF
Ceramic
Low Quiescent Current: 5μA
Low Ground Current: 350μA at 500mA
Fast Turn-On and Turn-Off: 60μS
Very Good Load/Line Regulation:
0.07/0.0 %
Current Limit and Thermal Protection
RoHS Compliant “Green”/Halogen Free
5-Pin SOT23 and 8-Pin DFN Packages
Fig. 1: SP6203/SP6205 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
1 page  
SP6203 / SP6205
300mA/500mA Low Noise CMOS LDO Regulators
ORDERING INFORMATION
Part Number
Ambient
Temperature
Range
SP6203EM5-L
SP6203EM5-L/TR
SP6203EM5-L-2-5
SP6203EM5-L-2-5/TR
SP6203EM5-L-2-8
SP6203EM5-L-2-8/TR
SP6203EM5L-2-85
SP6203EM5L-2-85/TR
SP6203EM5-L-3-0
SP6203EM5-L-3-0/TR
SP6203EM5-L-3-3
SP6203EM5-L-3-3/TR
-40°C≤TA≤+125°C
SP6203ER-L
SP6203ER-L/TR
SP6203ER-L-1-8
-40°C≤TA≤+125°C
SP6203ER-L-1-8
SP6205EM5-L
SP6205EM5-L/TR
SP6205EM5-L-1-8
SP6205EM5-L-1-8/TR
SP6205EM5-L-2-5
SP6205EM5-L-2-5/TR
SP6205EM5-L-2-8
SP6205EM5-L-2-8/TR -40°C≤TA≤+125°C
SP6205EM5-L-2-85
SP6205EM5-L-2-85/TR
SP6205EM5-L-3-0
SP6205EM5-L-3-0/TR
SP6205EM5-L-3-3
SP6205EM5-L-3-3/TR
SP6205ER-L
SP6205ER-L/TR
SP6205ER-L-2-5
-40°C≤TA≤+125°C
SP6205ER-L-2-5/TR
Marking
Q2WW
L2WW
Q3WW
H2WW
M2WW
J2WW
D0
YWW
XXX
E0
YWW
XXX
A3WW
X2WW
V2WW
E3WW
S2WW
W2WW
T2WW
F0
YWW
XXX
G0
YWW
XXX
Package
Packing
Quantity
Voltage Option
SOT-23-5
DFN8
SOT-23-5
DFN8
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
3K/Tape & Reel
Bulk
3K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
2.5K/Tape & Reel
Bulk
3K/Tape & Reel
Bulk
3K/Tape & Reel
ADJ
2.5V
2.8V
2.85V
3.0V
3.3V
ADJ
1.8V
ADJ
1.8V
2.5V
2.8V
2.85V
3.0V
3.3V
ADJ
2.5V
“Y” = Year – “WW” = Work Week – “X” = Lot Number; when applicable.
Note 1
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
© 2012 Exar Corporation
5/14
Rev. 2.0.0
5 Page 
SP6203 / SP6205
300mA/500mA Low Noise CMOS LDO Regulators
After calculation, we find that in such an
application (SP6205) the regulator is limited to
260.6mA. Doing the same calculations for the
300mA LDO (SP6203) will limit the regulator’s
output current to 260.9mA.
Also, taking advantage of the very low dropout
voltage characteristics of the SP6203/6205,
power dissipation can be reduced by using the
lowest possible input voltage to minimize the
input-to-output drop.
ADJUSTABLE REGULATOR APPLICATIONS
The SP6203/6205 can be adjusted to a specific
output voltage by using two external resistors
(see functional diagram). The resistors set the
output voltage based on the following
equation:
VOUT = VREF *(R1/R2 + 1)
Resistor values are not critical because ADJ
(adjust) has a high input impedance, but for
best performance use resistors of 470KΩ or
less. A bypass capacitor from ADJ to VOUT
provides improved noise performance.
DUAL-SUPPLY OPERATION
When used in dual supply systems where the
regulator load is returned to a negative
supply, the output voltage must be diode
clamped to ground.
LAYOUT CONSIDERATIONS
The primary path of heat conduction out of the
package is via the package leads. Therefore,
careful considerations have to be taken into
account:
1) Attaching the part to a larger copper
footprint will enable better heat transfer from
the device, especially on PCB’s where there
are internal ground and power planes.
2) Place the input, output and bypass
capacitors close to the device for optimal
transient response and device behavior.
3) Connect all ground connections directly to
the ground plane. In case there’s no ground
plane, connect to a common local ground point
before connecting to board ground.
Such layouts will provide a much better
thermal conductivity (lower θJA) for, a higher
maximum allowable power dissipation limit.
© 2012 Exar Corporation
11/14
Rev. 2.0.0
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SP6205.PDF ] | |
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