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LT1575CS8-1.5#PBF

Description
Linear Voltage Regulators Prec Linear Reg Controller
CategoryPower/power management    The power supply circuit   
File Size305KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
Download Datasheet Parametric View All

LT1575CS8-1.5#PBF Overview

Linear Voltage Regulators Prec Linear Reg Controller

LT1575CS8-1.5#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionSOP,
Contacts8
Manufacturer packaging code05-08-1610 (S8)
Reach Compliance Codecompliant
Maximum input voltage20 V
Minimum input voltage10 V
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Working temperatureTJ-Max100 °C
Working temperature TJ-Min
Maximum output current 10.0015 A
Maximum output voltage 11.515 V
Minimum output voltage 11.485 V
Nominal output voltage 11.5 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Regulator typeFIXED POSITIVE SINGLE OUTPUT LDO REGULATOR
Maximum seat height1.75 mm
surface mountYES
Terminal surfaceTin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9 mm
Base Number Matches1
LT1575/LT1577
Ultrafast Transient Response,
Low Dropout Regulators
Adjustable and Fixed
FEATURES
s
s
s
DESCRIPTION
The LT
®
1575/LT1577 are single/dual controller ICs that
drive low cost external N-channel MOSFETs as source
followers to produce ultrafast transient response, low
dropout voltage regulators.
The LT1575/LT1577 achieve unprecedented transient-
load performance by eliminating expensive tantalum or
bulk electrolytic output capacitors in the most demanding
modern microprocessor applications. Precision-trimmed
adjustable and fixed output voltage versions accommo-
date any required microprocessor power supply voltage.
Selection of the N-channel MOSFET R
DS(ON)
allows very
low dropout voltages to be achieved.
Unique protection features include a high side current
limit amplifier that activates a fault protection timer
circuit. A multifunction Shutdown pin provides either
current limit time-out with latchoff, overvoltage protec-
tion, thermal shutdown or a combination of these func-
tions. The LT1575 is available in 8-pin SO or PDIP and the
LT1577 is available in 16-pin narrow body SO.
, LTC and LT are registered trademarks of Linear Technology Corporation.
UltraFast is a trademark of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM Corporation.
s
s
s
UltraFast
TM
Transient Response
Eliminates
Tantalum and Electrolytic Output Capacitors
FET R
DS(ON)
Defines Dropout Voltage
1% Reference/Output Voltage Tolerance Over
Temperature
Typical Load Regulation: 1mV
High Side Sense Current Limit
Multifunction Shutdown Pin with Latchoff
APPLICATIONS
s
s
s
s
s
Pentium
®
Processor Supplies
PowerPC
TM
Supplies
5V to 3.XXV or 3.3V to 2.XXV Microprocessor Supplies
GTL Termination
Low Voltage Logic Supplies
Adjustable
1.5V Fixed
2.8V Fixed
3.3V Fixed
3.5V Fixed
5V Fixed
Adjustable, Adjustable
3.3V Fixed, Adjustable
3.3V Fixed, 2.8V Fixed
LT1575CN8/LT1575CS8
LT1575CN8-1.5/LT1575CS8-1.5
LT1575CN8-2.8/LT1575CS8-2.8
LT1575CN8-3.3/LT1575CS8-3.3
LT1575CN8-3.5/LT1575CS8-3.5
LT1575CN8-5/LT1575CS8-5
LT1577CS-ADJ/ADJ
LT1577CS-3.3/ADJ
LT1577CS-3.3/2.8
Consult factory for additional output voltage combinations available
in the LT1577.
TYPICAL APPLICATION
Ultrafast Transient Response 5V to 3.3V Low Dropout Regulator
(For Schematic Including Current Limit, See Typical Applications)
12V
1
* FOR T < 45°C:
C6 = 24
×
1µF Y5V
CERAMIC SURFACE
MOUNT CAPACITORS.
FOR T > 45°C:
C6 = 24
×
1µF X7R
CERAMIC SURFACE
MOUNT CAPACITORS.
PLACE C6 IN THE
MICROPROCESSOR
SOCKET CAVITY
2
LT1575-3.3
SHDN
IPOS
INEG
GATE
COMP
8
7
6
5
R2
5Ω
5V
C5
220µF
C2
V
IN
1µF 3
GND
4
OUT
+
Q1
IRFZ24
50mV/DIV
V
OUT
3.3V
5A
C6*
24µF
GND
1575/77 TA01
C3
10pF
R1
7.5k
C4
1000pF
2A/DIV
U
U
U
Transient Response for
0.2A to 5A Output Load Step
100µs/DIV
1575/77 TA02
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