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PDF SC1565 Data sheet ( Hoja de datos )

Número de pieza SC1565
Descripción VERY LOW DROPOUT 1.5 AMP REGULATOR
Fabricantes Semtech Corporation 
Logotipo Semtech Corporation Logotipo



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No Preview Available ! SC1565 Hoja de datos, Descripción, Manual

POWER MANAGEMENT
Description
The SC1565 is a high performance positive voltage
regulator designed for use in applications requiring very
low dropout voltage at up to 1.5 Amps. Since it has
superior dropout characteristics compared to regular
LDOs, it can be used to supply 2.5V on motherboards or
2.8V on peripheral cards from the 3.3V supply thus
allowing the elimination of costly heatsinks. Additionally,
the 5-lead TO-220/TO-263 and SO-8 versions have an
enable pin to further reduce power dissipation while shut
down. The SC1565 provides excellent regulation over
variations in line, load and temperature.
The SC1565 is available in SO-8, 3-lead SOT-223, 3 and
5 lead TO-220 and 3 and 5 lead TO-263 packages. Three
lead packages are available with 1.8V and 2.5V fixed
output options only. The SO-8, TO-220-5 and TO-263-5
are available with 1.8V and 2.5V internally preset
outputs that are also adjustable using external resistors.
SC1565
Very Low Dropout
1.5 Amp Regulator With Enable
Features
‹ 350mV dropout @ 1.5A
‹ Adjustable output from 1.2V to 4.8V(1)
‹ 2.5V and 1.8V options (adjustable externally
using resistors)(1)
‹ Over current and over temperature protection
‹ Enable pin(1)
‹ 10µA quiescent current in shutdown(1)
‹ Low reverse leakage (output to input)
‹ Surface mount and through-hole packages
‹ Full industrial temperature range
‹ TO-220, TO-263, SOT-223 and SO-8 Packages
Note:
(1) SO-8, TO-220-5 and TO-263-5 packages only.
Applications
‹ Battery powered systems
‹ Motherboards
‹ Peripheral cards
‹ Network cards
‹ Set Top Boxes
‹ Medical Equipment
‹ Notebook Computers
Typical Application Circuits
ENABLE
VIN
VO
VIN
U1
1 EN GND 8
2 VIN GND 7
3 VO GND 6
4 ADJ GND 5
R1 SC1565IS-X.X
C1 C2
R2
VO
=
1.200 (R1 + R2)
R2
Volts
U1
SC1565IT-X.X
1 VIN
VO 3
GND
C1
2
VIN
ENABLE
VO
C2
ENABLE
VIN
VO
C1 C2
U1
SC1565I5T-X.X
2 VIN
VO 4
1 EN GND ADJ 5
3
C1
U1
1 EN GND 8
2 VIN GND 7
3 VO GND 6
4 ADJ GND 5
SC1565IS-X.X
VO
=
1.200 (R1 + R2)
R2
Volts
VO
R1
C2
R2
Notes:
(1) Maximum VO setpoint for 1.8V parts = 5.4V.
(2) This device is designed to operate with ceramic input and output capacitors.
Revision: November 25, 2009
1
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1 page




SC1565 pdf
POWER MANAGEMENT
Block Diagram
SC1565
*
*
* Not present on SOT-223, TO-220-3 or TO-263-3
Pin Descriptions
Pin Name Pin Desciption
ADJ This pin, when grounded, sets the output voltage to that set by the internal feedback resistors. If external
feedback resistors are used, the output voltage will be (See Application Circuits on page 1):
VO
=
1.200 (R1 + R2)
R2
Volts
EN Enable Input. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a fraction of
its operating value. The device will be enabled if this pin is left open. Connect to VIN if not being used.
GND
Reference ground. Use all four pins on the SO-8 device for heatsinking. Use the tab on the SOT-223, TO-220
and TO-263 devices for heatsinking.
VIN Input voltage. For regulation at full load, the input to this pin must be between (VO + 0.7V) and 5.5V. Minimum
VIN = 2.2V.
VO The pin is the power output of the device.
2005 Semtech Corp.
5
www.semtech.com

5 Page





SC1565 arduino
POWER MANAGEMENT
Outline Drawing - SOT-223
b1
bbb C B A
N
E
1
e
e1
BD
DIMENSIONS
DIM
INCHES
MIN NOM MAX
MILLIMETERS
MIN NOM MAX
A
A-
- .070 -
- 1.80
A1 .000 - .004 0.02 - 0.10
A2 .059 .063 .067 1.50 1.60 1.70
b .025 - .033 0.65 - 0.85
E1 b1 .114 - .124 2.90 - 3.15
c .009 - .014 0.23 - 0.35
D .248 .256 .264 6.30 6.50 6.70
E .264 .276 .287 6.70 7.00 7.30
E1 .130 .138 .146 3.30 3.50 3.70
e .090 BSC
2.30 BSC
e1 .181 BSC
4.60 BSC
L .030 -
- 0.75 -
-
N
01 0°
4
- 10° 0°
4
- 10°
aaa .003
0.08
bbb .004
0.10
aaa C
SEATING
PLANE C
A2 A
A1
3X b
bbb C B A
GAGE
PLANE
0.25
H
L
DETAIL A
c
01
SEE DETAIL A
SIDE VIEW
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. DATUMS -A- AND -B- TO BE DETERMINED AT DATUM PLANE -H-
3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS
OR GATE BURRS.
4. REFERENCE JEDEC STD TO-261, VARIATION AA.
SC1565
Land Pattern - SOT-223
Y
X2
G
X1
Y
Z
C
DIM
C
G
P1
P2
X1
X2
Y
Z
DIMENSIONS
INCHES MILLIMETERS
(.244)
(6.20)
.157 4.00
.091 2.30
.181 4.60
.047 1.20
.138 3.50
.087
.331
2.20
8.40
P1
P2
NOTES:
1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
2. REFERENCE IPC-SM-782A.
2005 Semtech Corp.
11
www.semtech.com

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