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PDF SC1566I5T-1.8 Datasheet ( Hoja de datos )

Número de pieza SC1566I5T-1.8
Descripción Very Low Dropout 3.0 Amp Regulator With Enable
Fabricantes Semtech Corporation 
Logotipo Semtech Corporation Logotipo



Total 9 Páginas
		
SC1566I5T-1.8 Hoja de datos, Descripción, Manual
POWER MANAGEMENT
Description
SC1566
Very Low Dropout
3.0 Amp Regulator With Enable
Features
The SC1566 is a high performance positive voltage
regulator designed for use in applications requiring very
low dropout voltage at up to 3 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 heat sink size reduction or elimination.
Additionally, the five pin versions of SC1566 have an
enable pin, to further reduce power dissipation while shut
down. The SC1566 provides excellent regulation over
variations in line, load and temperature.
u 350mV dropout @ 3A
u Adjustable output from 1.2V to 4.8V
u 2.5V and 1.8V options (5 pin parts also adjustable
externally using resistors)
u Over current and over temperature protection
u Enable pin
u 10µA quiescent current in shutdown
u Low reverse leakage (output to input)
u Full industrial temperature range
u TO-220 and TO-263 packages
The SC1566 is available as three terminal fixed output
voltage and five terminal fixed or adjustable output
voltage devices with enable. Two package options are
available: TO-263 and TO-220.
Typical Application Circuits(1)(2)
Applications
u Battery powered systems
u Motherboards and notebook computers
u Peripheral cards
u Network cards
u Set top boxes
u Medical equipment
U1
SC1566I5T-2.5
VIN
1 VIN
VO 5
VO = See equation below
ENABLE
24
EN GND ADJ
3
C1
R1
VO = 1.200(R1+ R2) Volts
C2 R2
R2
VIN
ENABLE
U1
SC1566I5T-2.5
1 VIN
VO 5
24
EN GND ADJ
C1
3
VO = 2.5V
C2
U1
SC1566IT-1.8
VIN
1 VIN
VO 3
GND
C1
2
Revision 1, January 2001
VO = 1.8V
Notes:
C2 (1) Maximum VO setpoint for 1.8V parts = 5.4V
(2) This device is designed to operate with
ceramic input and output capacitors
1 www.semtech.com

1 page

SC1566I5T-1.8 pdf
SC1566
POWER MANAGEMENT
Typical Characteristics
Dropout Voltage vs. Output Current
vs. Junction Temperature
500
150°C
450
400
25°C
350
0°C
300 -40°C
250
200
150
100
50
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
IO (A)
Output Voltage (2.5V) vs. Junction
Temperature vs. Output Current
2.550
VIN = 3.2V
2.540
2.530
2.520
2.510
2.500
2.490
2.480
IO = 10mA
IO = 3A
2.470
2.460
2.450
-50 -25 0 25 50 75 100 125 150
TJ (°C)
Reference Voltage vs. Junction
Temperature vs. Output Current
1.225
VIN = 2.2V
1.220
1.215
1.210
1.205
1.200
IO = 10mA
1.195
1.190
IO = 3A
1.185
1.180
1.175
-50
-25
0
25 50 75
TJ (°C)
100 125 150
Dropout Voltage vs. Junction
Temperature vs. Output Current
500
450
400 IO = 3A
350
300 IO = 1.5A
250
200
150
IO = 0.5A
100
50
0
-50 -25 0 25 50 75 100 125 150
TJ (°C)
Output Voltage (2.5V) vs. Junction
Temperature vs. Output Current
2.550
VIN = 5.5V
2.540
2.530
2.520
2.510
2.500
2.490
2.480
2.470
2.460
2.450
-50
-25
IO = 10mA
IO = 3A
0 25 50 75
TJ (°C)
100 125 150
Reference Voltage vs. Junction
Temperature vs. Output Current
1.225
VIN = 5.5V
1.220
1.215
1.210
1.205
1.200
IO = 3A
1.195
1.190
IO = 10mA
1.185
1.180
1.175
-50
-25
0
25 50 75
TJ (°C)
100 125 150
ã 2001 Semtech Corp.
5
www.semtech.com

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