LTC1701BES5#TR datasheet, PDF - EEWORLD Datasheet

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LTC1701BES5#TR: DescriptionIC reg buck adj 0.5A tsot23-5; CategoryPower/power management The power supply circuit; File Size97KB，2 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC1701BES5#TR Overview

IC reg buck adj 0.5A tsot23-5

LTC1701BES5#TR Parametric

Parameter Name	Attribute value
Brand Name	Linear Technology
Is it Rohs certified?	incompatible
Maker	Linear ( ADI )
Parts packaging code	SOT
package instruction	LSSOP,
Contacts	5
Manufacturer packaging code	S5
Reach Compliance Code	_compli
ECCN code	EAR99
Is Samacsys	N
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
control mode	CURRENT-MODE
Control Technology	CONSTANT OFF TIME
Maximum input voltage	5.5 V
Minimum input voltage	2.5 V
Nominal input voltage	3.3 V
JESD-30 code	R-PDSO-G5
JESD-609 code	e0
length	2.95 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	5
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	1.1 A
Package body material	PLASTIC/EPOXY
encapsulated code	LSSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	255
Certification status	Not Qualified
Maximum seat height	1.45 mm
surface mount	YES
Switch configuration	BUCK
Maximum switching frequency	1000 kHz
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.95 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	40
width	1.625 mm
Base Number Matches	1

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DC289 Introduction

Description

Demonstration Circuit DC289 is a step-down (buck) regulator using the LTC

1701. The

combination of the LTC1701’s tiny SOT-23 package and high switching frequency

results in a highly efficient application in a small board space. It is ideal for cell phones

and other portable electronics operating from one Li-Ion cell or three to four NiCd or

NiMH cells. DC289 operates from a 2.5 to 5.5V input voltage range and is capable of

providing 0.5A with a jumper-selectable output voltage of 1.5/2.5/3.3V-ADJ.

This board highlights the capabilities of the LTC1701, which uses a current mode,

constant off-time architecture to control an internal P-channel power MOSFET at about

1MHz. This high performance power supply occupies less than 0.3 square inches and has

low output voltage ripple and fast transient response.

At low output currents, the LTC1701 automatically switches to Burst Mode™ operation

to maintain high operating efficiencies by minimizing supply current. The part can be

shut down by pulling the I

/RUN pin low, further reducing the supply current to less

than 1µA.

In dropout, the P-channel MOSFET is turned on continuously (100% duty cycle),

providing low dropout operation with V

OUT

≅

, thereby maximizing battery life.

Quick Start Guide

Demonstration Board DC289 is easy to set up for evaluation of the LTC1701. Please

follow the procedure below for proper operation:

1. Move jumper JP1 to the appropriate position for the required output voltage. For

voltages other than the preset value, make sure you install the calculated resistor at

the pad provided for R7.

2. To shut down the circuit, connect the I

/RUN terminal to ground. When the part is

not shut down, be careful not to add excessive capacitance to the I

/RUN pin, since

it affects the transient response.

3. Connect the input power supply to the V

and GND terminals.

4. Connect the load between the V

OUT

and GND terminals. Refer to the connection

diagram (Figure 1) for proper measurement equipment setup.

XXXYYYY

LTC1701BES5#TR Related Products

	LTC1701BES5#TR	LTC1701BES5#TRPBF	LTC1701BES5#TRM	LTC1701ES5#TR	LTC1701ES5#TRM	DC289A	LTC1701ES5#TRPBF	LTC1701ES5#TRMPBF	LTC1701BES5#TRMPBF
Description	IC reg buck adj 0.5A tsot23-5	IC reg buck adj 0.5A tsot23-5	IC reg buck adj 0.5A tsot23-5	IC reg buck adj 0.5A tsot23-5	IC reg buck adj 0.5A tsot23-5	board eval for ltc1701es5	IC REG BUCK ADJ 0.5A TSOT23-5	IC REG BUCK ADJ 0.5A TSOT23-5	IC REG BUCK ADJ 0.5A TSOT23-5
Brand Name	Linear Technology	Linear Technology	Linear Technology	Linear Technology	Linear Technology	-	Linear Technology	Linear Technology	Linear Technology
Is it Rohs certified?	incompatible	conform to	incompatible	incompatible	incompatible	-	conform to	conform to	conform to
Maker	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )	-	Linear ( ADI )	Linear ( ADI )	Linear ( ADI )
Parts packaging code	SOT	SOT	SOT	SOT	SOT	-	SOT	SOT	SOT
package instruction	LSSOP,	LSSOP,	LSSOP,	PLASTIC, SOT-23, 5 PIN	LSSOP,	-	LSSOP,	LSSOP,	LSSOP,
Contacts	5	5	5	5	5	-	5	5	5
Manufacturer packaging code	S5	S5	S5	S5	S5	-	S5	S5	S5
Reach Compliance Code	_compli	compli	_compli	_compli	_compli	-	compliant	compliant	compliant
ECCN code	EAR99	EAR99	EAR99	EAR99	EAR99	-	EAR99	EAR99	EAR99
Is Samacsys	N	N	N	N	N	-	N	N	N
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	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	CURRENT-MODE	CURRENT-MODE
Control Technology	CONSTANT OFF TIME	CONSTANT OFF TIME	CONSTANT OFF TIME	CONSTANT OFF TIME	CONSTANT OFF TIME	-	CONSTANT OFF TIME	CONSTANT OFF TIME	CONSTANT OFF TIME
Maximum input voltage	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	-	5.5 V	5.5 V	5.5 V
Minimum input voltage	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	-	2.5 V	2.5 V	2.5 V
Nominal input voltage	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V	-	3.3 V	3.3 V	3.3 V
JESD-30 code	R-PDSO-G5	R-PDSO-G5	R-PDSO-G5	R-PDSO-G5	R-PDSO-G5	-	R-PDSO-G5	R-PDSO-G5	R-PDSO-G5
JESD-609 code	e0	e3	e0	e0	e0	-	e3	e3	e3
length	2.95 mm	2.95 mm	2.95 mm	2.95 mm	2.95 mm	-	2.95 mm	2.95 mm	2.95 mm
Humidity sensitivity level	1	1	1	1	1	-	1	1	1
Number of functions	1	1	1	1	1	-	1	1	1
Number of terminals	5	5	5	5	5	-	5	5	5
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	-	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-	-40 °C	-40 °C	-40 °C
Maximum output current	1.1 A	1.1 A	1.1 A	1.1 A	1.1 A	-	1.1 A	1.1 A	1.1 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	-	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	LSSOP	LSSOP	LSSOP	LSSOP	LSSOP	-	LSSOP	LSSOP	LSSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	-	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	255	250	235	235	235	-	260	250	260
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.45 mm	1.45 mm	1.45 mm	1.45 mm	1.45 mm	-	1.45 mm	1.45 mm	1.45 mm
surface mount	YES	YES	YES	YES	YES	-	YES	YES	YES
Switch configuration	BUCK	BUCK	BUCK	BUCK	BUCK	-	BUCK	BUCK	BUCK
Maximum switching frequency	1000 kHz	1000 kHz	1000 kHz	1000 kHz	1000 kHz	-	1000 kHz	1000 kHz	1000 kHz
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	-	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	-	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	-	GULL WING	GULL WING	GULL WING
Terminal pitch	0.95 mm	0.95 mm	0.95 mm	0.95 mm	0.95 mm	-	0.95 mm	0.95 mm	0.95 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	-	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	40	NOT SPECIFIED	20	20	20	-	30	NOT SPECIFIED	30
width	1.625 mm	1.625 mm	1.625 mm	1.625 mm	1.625 mm	-	1.625 mm	1.625 mm	1.625 mm
Base Number Matches	1	1	1	1	1	-	1	1	1

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