LT1577CS-3.3/2.8#PBF datasheet, PDF

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LT1577CS-3.3/2.8#PBF: DescriptionLDO Regulator Pos 2.8V3.3V 5A 16-Pin SOIC N Tube; File Size212KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LT1577CS-3.3/2.8#PBF Overview

LDO Regulator Pos 2.8V3.3V 5A 16-Pin SOIC N Tube

LT1577CS-3.3/2.8#PBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Type	LDO
Number of Outputs	2
Polarity	Positive
Accuracy (%)	±0.6
Output Type	Fixed
Output Voltage (V)	2.8\|3.3
Maximum Output Current (A)	5
Minimum Input Voltage (V)	5
Maximum Input Voltage (V)	22
Line Regulation	0.03%/V
Load Regulation	1mV(Typ)
Junction to Ambient	100°C/W
Special Features	Current Limit\|Shutdown\|Over Voltage Protection\|Thermal Protection
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Supplier Temperature Grade	Commercial
Packaging	Tube
Supplier Package	SOIC N
Pin Count	16
Standard Package Name	SOP
Mounting	Surface Mount
Package Height	1.5(Max)
Package Length	10.01(Max)
Package Width	3.99(Max)
PCB changed	16
Lead Shape	Gull-wing

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LT1575/LT1577

Ultrafast Transient Response,

Low Dropout Regulators

Adjustable and Fixed

FEATURES

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.

UltraFast

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

Pentium

Processor Supplies

PowerPC

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

* 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

LT1575-3.3

SHDN

IPOS

INEG

GATE

COMP

5Ω

220µF

1µF 3

GND

OUT

IRFZ24

50mV/DIV

OUT

3.3V

C6*

24µF

GND

1575/77 TA01

10pF

7.5k

1000pF

2A/DIV

Transient Response for

0.2A to 5A Output Load Step

100µs/DIV

1575/77 TA02

LT1577CS-3.3/2.8#PBF Related Products

	LT1577CS-3.3/2.8#PBF	LT1575CN8	LT1575CS8-3.3#TRPBF	LT1575CS8-5#TRPBF	LT1575CS8	LT1577CS-3.3/2.8#TRPBF	LT1577CS-3.3/ADJ#PBF	LT1577CS-3.3/ADJ#TRPBF	LT1577CS-ADJ/ADJ#PBF	LT1577CS-ADJ/ADJ#TRPBF
Description	LDO Regulator Pos 2.8V3.3V 5A 16-Pin SOIC N Tube	LDO Regulator Pos 1.27V 10A 8-Pin PDIP N	LDO Regulator Pos 3.3V 10A 8-Pin SOIC N T/R	LDO Regulator Pos 5V 10A 8-Pin SOIC N T/R	LDO Regulator Pos 1.27V 10A 8-Pin SOIC N	LDO Regulator Pos 2.8V3.3V 5A 16-Pin SOIC N T/R	LDO Regulator Pos 3.3V1.27V 5A 16-Pin SOIC N Tube	LDO Regulator Pos 3.3V1.27V 5A 16-Pin SOIC N T/R	LDO Regulator Pos 1.27V 5A 16-Pin SOIC N Tube	LDO Regulator Pos 1.27V 5A 16-Pin SOIC N T/R
EU restricts the use of certain hazardous substances	Compliant	Not Compliant	Compliant	Compliant	Not Compliant	Compliant	Compliant	Compliant	Compliant	Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Active	Unconfirmed	Unconfirmed	Unconfirmed	Unconfirmed	Active	Active	Active	Active	Active
HTS	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01
Type	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO	LDO
Number of Outputs	2	1	1	1	1	2	2	2	2	2
Polarity	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive
Accuracy (%)	±0.6	±0.6	±0.6	±0.6	±0.6	±0.6	±0.6	±0.6	±0.6	±0.6
Output Type	Fixed	Adjustable	Fixed	Fixed	Adjustable	Fixed	Adjustable\|Fixed	Adjustable\|Fixed	Adjustable	Adjustable
Output Voltage (V)	2.8\|3.3	1.27(Min)	3.3	5	1.27(Min)	3.3\|2.8	1.27(Min)\|3.3	3.3\|1.27(Min)	1.27(Min)	1.27(Min)
Maximum Output Current (A)	5	10(Typ)	10(Typ)	10(Typ)	10(Typ)	5	5	5	5	5
Minimum Input Voltage (V)	5	5	5	5	5	5	5	5	5	5
Maximum Input Voltage (V)	22	22	22	22	22	22	22	22	22	22
Line Regulation	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V	0.03%/V
Load Regulation	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)	1mV(Typ)
Junction to Ambient	100°C/W	100°C/W	130°C/W	130°C/W	130°C/W	100°C/W	100°C/W	100°C/W	100°C/W	100°C/W
Special Features	Current Limit\|Shutdown\|Over Voltage Protection\|Thermal Protection	Thermal Protection\|Shutdown\|Over Voltage Protection\|Current Limit	Current Limit\|Thermal Protection\|Shutdown\|Over Voltage Protection	Thermal Protection\|Current Limit\|Over Voltage Protection\|Shutdown	Current Limit\|Over Voltage Protection\|Shutdown\|Thermal Protection	Shutdown\|Thermal Protection\|Current Limit\|Over Voltage Protection	Current Limit\|Over Voltage Protection\|Shutdown\|Thermal Protection	Current Limit\|Over Voltage Protection\|Shutdown\|Thermal Protection	Thermal Protection\|Shutdown\|Over Voltage Protection\|Current Limit	Current Limit\|Over Voltage Protection\|Shutdown\|Thermal Protection
Maximum Operating Temperature (°C)	70	70	70	70	70	70	70	70	70	70
Supplier Temperature Grade	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial
Supplier Package	SOIC N	PDIP N	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N	SOIC N
Pin Count	16	8	8	8	8	16	16	16	16	16
Standard Package Name	SOP	DIP	SOP	SOP	SOP	SOP	SOP	SOP	SOP	SOP
Mounting	Surface Mount	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	1.5(Max)	3.3	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)	1.5(Max)
Package Length	10.01(Max)	10.16(Max)	5(Max)	5(Max)	5(Max)	10.01(Max)	10.01(Max)	10.01(Max)	10.01(Max)	10.01(Max)
Package Width	3.99(Max)	6.48	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)	3.99(Max)
PCB changed	16	8	8	8	8	16	16	16	16	16
Lead Shape	Gull-wing	Through Hole	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing
Packaging	Tube	-	Tape and Reel	Tape and Reel	-	Tape and Reel	Tube	Tape and Reel	Tube	Tape and Reel
Reference Voltage (V)	-	1.21	-	-	1.21	-	1.21	1.21	1.21	1.21

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