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SC1566 PDF даташит

Спецификация SC1566 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «Very Low Dropout 3.0 Amp Regulator With Enable».

Детали детали

Номер произв SC1566
Описание Very Low Dropout 3.0 Amp Regulator With Enable
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC1566 Даташит, Описание, Даташиты
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









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SC1566 Даташит, Описание, Даташиты
POWER MANAGEMENT
Absolute Maximum Ratings
Parameter
Input Voltage
Power Dissipation
Thermal Resistance Junction to Ambient
SC1566IM (TO-263)
SC1566IT (TO-220)
Thermal Resistance Junction to Case
SC1566IM (TO-263)
SC1566IT (TO-220)
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
ESD Rating (Human Body Model)
SC1566
Symbol
VIN
PD
qJA
Max
5.5
Internally Limited
60
50
Units
V
W
°C/W
qJC
TA
TJ
TSTG
TLEAD
VESD
3
3
-40 to +85
-40 to +150
-65 to +150
300
2
°C/W
°C
°C
°C
°C
kV
Electrical Characteristics
Unless specified: VEN = VIN. Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2V to 5.5V and IO = 10µA to 3A.
Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 3A. Values in bold apply over the full operating temperature range.
Parameter
Symbol
Test Conditions
Min Typ Max
Units
VIN
Supply Voltage Range
Quiescent Current
VO
VIN
IQ
VIN = 3.3V
VIN = 5.5V, VEN = 0V
2.2 5.5 V
0.75 1.75 mA
10 35 µA
Output Voltage(1)
(Internal Fixed Voltage)
Line Regulation(1)
Load Regulation(1)
Dropout Voltage(1)(2)
VO
REG(LINE)
REG(LOAD)
VD
VIN = VO + 0.7V, IO = 10mA
VIN = (VO + 0.25V) to 5.5V, IOUT = 10mA
VIN = VO + 0.7V
IO = 10mA
-1% VO +1% V
-2% +2%
0.035 0.3
%
0.2 0.4 %
1 5 mV
10
IO = 500mA
75 100 mV
150
ã 2001 Semtech Corp.
2
www.semtech.com









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SC1566 Даташит, Описание, Даташиты
SC1566
POWER MANAGEMENT
Electrical Characteristics (Cont.)
Unless specified: VEN = VIN. Adjustable Option (VADJ > VTH(ADJ)): VIN = 2.2V to 5.5V and IO = 10µA to 3A.
Fixed Options (VADJ = GND): VIN = (VO + 0.7V) to 5.5V and IO = 0A to 3A. Values in bold apply over the full operating temperature range.
Parameter
Symbol
Test Conditions
Min Typ Max
Units
VO (Cont.)
Dropout Voltage(1)(2)
IO = 1.5A
200 300 mV
400
IO = 3A
350 450 mV
600
Minimum Load Current(3)
Current Limit
ADJ
IO
ICL
VIN = VO + 0.7V
1 10 µA
3.0 4.5 6.5 A
Reference Voltage(1)
VREF
VIN = 2.2V, VADJ = VOUT, IO = 10mA
1.188
1.176
1.200
1.212
1.224
V
Adjust Pin Current(4)
Adjust Pin Threshold(5)
EN
IADJ
VTH(ADJ)
VADJ = VREF
10 50 nA
0.10 0.20 0.40 V
Enable Pin Current
IEN
Enable Pin Threshold
VIH
VIL
Over Temperature Protection
VEN = 0V, VIN = 3.3V
VIN = 3.3V
VIN = 3.3V
1.5 10 µA
1.8 V
0.4
High Trip level
THI
175 °C
Hysteresis
THYST
10 °C
Notes:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) Defined as the input to output differential at which the output voltage drops to 1% below the value
measured at a differential of 0.7V.
(3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this
requirement. Adjustable versions only.
(4) Guaranteed by design.
(5) When VADJ exceeds this threshold, the “Sense Select” switch disconnects the internal feedback chain from
the error amplifier and connects VADJ instead.
ã 2001 Semtech Corp.
3
www.semtech.com










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