LTC1707IS8#TR datasheet, PDF - EEWORLD Datasheet

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LTC1707IS8#TR: DescriptionIC reg buck sync adj 0.6A 8soic; CategoryPower/power management The power supply circuit; File Size213KB，12 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1707IS8#TR Overview

IC reg buck sync adj 0.6A 8soic

LTC1707IS8#TR Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	incompatible
Maker	Linear ( ADI )
Parts packaging code	SOIC
package instruction	SOP,
Contacts	8
Manufacturer packaging code	S8
Reach Compliance Code	_compli
ECCN code	EAR99
Is Samacsys	N
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	8.5 V
Minimum input voltage	2.85 V
Nominal input voltage	5 V
JESD-30 code	R-PDSO-G8
JESD-609 code	e0
length	4.9 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	8
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	1.5 A
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	235
Certification status	Not Qualified
Maximum seat height	1.75 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	385 kHz
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	20
width	3.9 mm
Base Number Matches	1

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DEMO MANUAL DC257

NO-DESIGN SWITCHER

LTC1707 Monolithic

Synchronous Step-Down Regulator

DESCRIPTIO

Demonstration circuit DC257 is a constant-frequency

step-down converter using an LTC

1707 monolithic syn-

chronous regulator. It provides low input voltage, high

conversion efficiency for cell phones and other portable

electronics operating from one or two Li-Ion cells or three

to six NiCd cells. Constant 350kHz operation and up to

600mA output capability in an SO-8 package provide a low

noise, space-efficient solution for wireless applications.

The circuit highlights the capability of the LTC1707. De-

signed to work at low voltages, the input voltage (V

) can

range from 2.85V to 8.5V. At V

< 2.7V, the LTC1707

shuts down and draws just a few microamperes, making

PERFOR A CE SU

SYMBOL

OUT

PARAMETER

Input Voltage Range

Output Voltage

Pulse Skipping Mode Supply Current

Burst Mode Enabled Supply Current

Shutdown Current

TYPICAL PERFOR A CE CHARACTERISTICS A D BOARD PHOTO

LTC1707 Efficiency Curve

100

OUT

= 3.3V

= 6V

EFFICIENCY (%)

100

OUTPUT CURRENT (mA)

1000

DC257 TA01

= 3.6V

= 8.4V

U W

it ideal for single lithium-ion battery applications. DC257’s

output voltage is programmable from 1.5V to 3.3V via a

jumper.

At low output currents, the LTC1707 automatically switches

to Burst Mode

operation to reduce switching losses and

maintain high operating efficiencies. In switching-noise

sensitive applications, Burst Mode operation can be inhib-

ited by grounding the SYNC/MODE pin or synchronizing it

with an external clock.

Gerber files for this circuit board

are available. Call the LTC factory.

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

Burst Mode is a trademark of Linear Technology Corporation.

U W

ARY

CONDITIONS

See Figure 2

JUMPER POSITION

JP1 = “1.5V”

JP1 = “1.8V”

JP1 = “2.5V”

JP1 = “2.9V”

JP1 = “3.3V”

JP1 = “OPEN”

JP1 = “3.3V”

VALUE

2.85V to 8.5V

1.51V

±0.036V

1.82V

0.043V

2.52V

0.06V

2.94V

0.07V

3.33V

0.079V

Note 1

300µA

200µA

15µA

= 5V, SYNC/MODE = 0V, RUN/SS = 2V, I

OUT

= 0mA

= 5V, SYNC/MODE = 2V, RUN/SS = 2V, I

OUT

= 0mA

= 5V, RUN/SS = 0V, I

OUT

= 0mA

Demo Board

LTC1707IS8#TR Related Products

	LTC1707IS8#TR	LTC1707CS8#TR	DC257A	LTC1707IS8#TRPBF	LTC1707CS8#TRPBF	LTC1707IS8#PBF	LTC1707CS8#PBF
Description	IC reg buck sync adj 0.6A 8soic	IC reg buck sync adj 0.6A 8soic	board eval for ltc1707cs8	IC REG BUCK ADJ 0.6A SYNC 8SOIC	IC REG BUCK ADJ 0.6A SYNC 8SOIC	IC REG BUCK ADJ 0.6A SYNC 8SOIC	IC REG BUCK ADJ 0.6A SYNC 8SOIC
Brand Name	Linear Technology	Linear Technology	-	Linear Technology	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	incompatible	incompatible	-	conform to	conform to	conform to	conform to
Maker	Linear ( ADI )	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	SOIC	SOIC	-	SOIC	SOIC	SOIC	SOIC
package instruction	SOP,	SOP,	-	SOP,	SOP,	SOP, SOP8,.25	SOP, SOP8,.25
Contacts	8	8	-	8	8	8	8
Manufacturer packaging code	S8	S8	-	S8	S8	S8	S8
Reach Compliance Code	_compli	_compli	-	compliant	compliant	compliant	compliant
ECCN code	EAR99	EAR99	-	EAR99	EAR99	EAR99	EAR99
Is Samacsys	N	N	-	N	N	N	N
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	-	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
control mode	CURRENT-MODE	CURRENT-MODE	-	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	8.5 V	8.5 V	-	8.5 V	8.5 V	8.5 V	8.5 V
Minimum input voltage	2.85 V	2.85 V	-	2.85 V	2.85 V	2.85 V	2.85 V
Nominal input voltage	5 V	5 V	-	5 V	5 V	5 V	5 V
JESD-30 code	R-PDSO-G8	R-PDSO-G8	-	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8	R-PDSO-G8
JESD-609 code	e0	e0	-	e3	e3	e3	e3
length	4.9 mm	4.9 mm	-	4.9 mm	4.9 mm	4.9 mm	4.9 mm
Humidity sensitivity level	1	1	-	1	1	1	1
Number of functions	1	1	-	1	1	1	1
Number of terminals	8	8	-	8	8	8	8
Maximum operating temperature	85 °C	70 °C	-	85 °C	70 °C	85 °C	70 °C
Maximum output current	1.5 A	1.5 A	-	1.5 A	1.5 A	1.5 A	1.5 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SOP	SOP	-	SOP	SOP	SOP	SOP
Package shape	RECTANGULAR	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	SMALL OUTLINE	-	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	235	235	-	260	260	260	260
Certification status	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.75 mm	1.75 mm	-	1.75 mm	1.75 mm	1.75 mm	1.75 mm
surface mount	YES	YES	-	YES	YES	YES	YES
Switch configuration	BUCK	BUCK	-	BUCK	BUCK	BUCK	BUCK
Maximum switching frequency	385 kHz	385 kHz	-	385 kHz	385 kHz	385 kHz	385 kHz
technology	CMOS	CMOS	-	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	COMMERCIAL	-	INDUSTRIAL	COMMERCIAL	INDUSTRIAL	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	-	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	1.27 mm	1.27 mm	-	1.27 mm	1.27 mm	1.27 mm	1.27 mm
Terminal location	DUAL	DUAL	-	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	20	20	-	30	30	30	30
width	3.9 mm	3.9 mm	-	3.9 mm	3.9 mm	3.9 mm	3.9 mm
Base Number Matches	1	1	-	1	1	1	1

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