LTC1753CSW datasheet, PDF - EEWORLD Datasheet

LTC1753CSW: DescriptionDC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W; File Size238KB，24 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC1753CSW Overview

DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W

LTC1753CSW Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Not Compliant
ECCN (US)	EAR99
Part Status	Unconfirmed
HTS	8542.39.00.01
SVHC	Yes
SVHC Exceeds Threshold	Yes
Number of Outputs	1
Topology	Step Down
Maximum Switching Frequency (kHz)	350
Minimum Input Voltage (V)	4.7
Maximum Input Voltage (V)	12
Operating Supply Voltage (V)	4.5 to 6
Maximum Supply Current (mA)	1.2
Minimum Switching Frequency (kHz)	250
Typical Switching Frequency (kHz)	300
Synchronous Rectifier	Yes
Synchronous Clock	Yes
Control Method	PWM
Programmability	Yes
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Supplier Temperature Grade	Commercial
Pin Count	20
Standard Package Name	SOP
Supplier Package	SOIC W
Mounting	Surface Mount
Package Height	2.34(Max)
Package Length	13.01(Max)
Package Width	7.6(Max)
PCB changed	20
Lead Shape	Gull-wing

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LTC1753

5-Bit Programmable

Synchronous Switching

Regulator Controller for

Pentium

III Processor

FEATURES

DESCRIPTIO

5-Bit Digitally Programmable 1.3V to 3.5V Fixed

Output Voltage, VRM 8.4 Compliant

Fast Transient Response: 0% to 100% Duty Cycle

Phase Lead Compensation for Remote Sensing

Overtemperature Protection

Flags for Power Good and Overvoltage Fault

19A Output Current Capability from a 5V Supply

Dual N-Channel MOSFET Synchronous Driver

Initial Output Accuracy:

±1.5%

Excellent Output Accuracy:

±2%

Typ Over Line,

Load and Temperature Variations

High Efficiency: Over 95% Possible

Adjustable Current Limit Without External Sense

Resistors

Available in 2O-Lead SSOP and SW Packages

APPLICATIO S

Power Supply for Pentium

III, AMD-K6

-2, SPARC,

ALPHA and PA-RISC Microprocessors

High Power 5V to 1.3V-3.5V Regulators

The LTC

1753 is a high power, high efficiency switching

regulator controller optimized for 5V input to a digitally

programmable 1.3V-3.5V output. The internal 5-bit DAC

programs the output voltage from 1.3V to 2.05V in 50mV

increments and from 2.1V to 3.5V in 100mV increments. The

precision internal reference and an internal feedback system

provide an output accuracy of

±1.5%

at room temperature

and typically

±2%

over temperature, load current and line

voltage shifts. The LTC1753 uses a synchronous switching

architecture with two external N-channel output devices,

providing high efficiency and eliminating the need for a high

power, high cost P-channel device. Additionally, it senses the

output current across the on-resistance of the upper N-

channel FET, providing an adjustable current limit without an

external low value sense resistor.

The LTC1753 free-runs at 300kHz and can be synchronized

to a faster external clock if desired. It provides a phase lead

compensation scheme and under harsh loading conditions,

the PWM duty cycle can be momentarily forced to 0% or

100% to reduce the output voltage recovery time.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Pentium is a registered trademark of Intel Corporation.

AMD-K6 is a registered trademark of Advanced Micro Devices, Inc.

TYPICAL APPLICATIO

5.6k

12V

0.1µF

5.6k

10µF

600Ω

0.1µF

10µF

Q1A*

PWRGD

FAULT

CPU

VID0 TO VID4

OUTEN

COMP

15k

4700pF

SGND

GND

SENSE

LTC1753

Q2A*

Q2*

MAX

20Ω

OUT

††

2700µF

Q1*

†

1.3µH

18A

OUT

1.3V TO

3.5V

14A

150pF

0.1µF

1µF

* SILICONIX SUD50N03-10

** SANYO 10MV1200GX

†

PANASONIC ETQP 6FIR3LFA

††

SANYO 6MV2700GX

Figure 1. 5V to 1.3V-3.5V Supply Application

1753fa

1200µF

1753 F01

LTC1753CSW Related Products

	LTC1753CSW	LTC1753CG#PBF	LTC1753CG#TRPBF	LTC1753CG	LTC1753CSW#PBF	LTC1753CSW#TR	LTC1753CSW#TRPBF
Description	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SSOP Tube	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SSOP T/R	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SSOP	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W Tube	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W T/R	DC/DC Cntrlr Single-OUT Step Down 350kHz 20-Pin SOIC W T/R
EU restricts the use of certain hazardous substances	Not Compliant	Compliant	Compliant	Not Compliant	Compliant	Not Compliant	Compliant
ECCN (US)	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
Part Status	Unconfirmed	Active	Active	Unconfirmed	Active	Unconfirmed	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
Number of Outputs	1	1	1	1	1	1	1
Topology	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down	Step Down
Maximum Switching Frequency (kHz)	350	350	350	350	350	350	350
Minimum Input Voltage (V)	4.7	4.7	4.7	4.7	4.7	4.7	4.7
Maximum Input Voltage (V)	12	12	12	12	12	12	12
Operating Supply Voltage (V)	4.5 to 6	4.5 to 6	4.5 to 6	4.5 to 6	4.5 to 6	4.5 to 6	4.5 to 6
Maximum Supply Current (mA)	1.2	1.2	1.2	1.2	1.2	1.2	1.2
Minimum Switching Frequency (kHz)	250	250	250	250	250	250	250
Typical Switching Frequency (kHz)	300	300	300	300	300	300	300
Synchronous Rectifier	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Synchronous Clock	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Control Method	PWM	PWM	PWM	PWM	PWM	PWM	PWM
Programmability	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Maximum Operating Temperature (°C)	70	70	70	70	70	70	70
Supplier Temperature Grade	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial	Commercial
Pin Count	20	20	20	20	20	20	20
Standard Package Name	SOP	SOP	SOP	SOP	SOP	SOP	SOP
Supplier Package	SOIC W	SSOP	SSOP	SSOP	SOIC W	SOIC W	SOIC W
Mounting	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	2.34(Max)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2(Max) - 0.05(Min)	2.34(Max)	2.34(Max)	2.34(Max)
Package Length	13.01(Max)	7.5	7.5	7.5	13.01(Max)	13.01(Max)	13.01(Max)
Package Width	7.6(Max)	5.6(Max)	5.6(Max)	5.6(Max)	7.6(Max)	7.6(Max)	7.6(Max)
PCB changed	20	20	20	20	20	20	20
Lead Shape	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing	Gull-wing

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