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LTC1503IS8-1.8

Description
High Efficiency Inductorless Step-Down DC/DC Converters
CategoryPower/power management    The power supply circuit   
File Size189KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1503IS8-1.8 Overview

High Efficiency Inductorless Step-Down DC/DC Converters

LTC1503IS8-1.8 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instruction0.150 INCH, PLASTIC, SOP-8
Contacts8
Manufacturer packaging codeS8
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesDC-DC REGULATED POWER SUPPLY MODULE
Maximum input voltage6 V
Minimum input voltage2.4 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of functions1
Output times1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current0.1 A
Maximum output voltage1.872 V
Minimum output voltage1.728 V
Nominal output voltage1.8 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP8,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
Fine-tuning/adjustable outputNO
width3.9 mm
LTC1503-1.8/LTC1503-2
High Efficiency Inductorless
Step-Down DC/DC Converters
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Input Voltage Range: 2.4V to 6V
Fixed Output Voltages: 1.8V
±4%,
2V
±4%
Output Current: Up to 100mA
No Inductors
Typical Efficiency 25% Higher than LDOs
Low Operating Current: 25
µ
A
Low Shutdown Current: 5
µ
A
600kHz Switching Frequency
Shutdown Disconnects Load from V
IN
Soft-Start Limits Inrush Current at Turn-On
Short-Circuit and Overtemperature Protected
Available in 8-Pin MSOP and SO Packages
The LTC
®
1503-1.8/LTC1503-2 are switched capacitor
step-down DC/DC converters that produce a regulated
output from a 2.4V to 6V input. The parts use switched
capacitor fractional conversion to achieve high efficiency
over the entire input range. No inductors are required.
Internal circuitry controls the step-down conversion ratio
to optimize efficiency as the input voltage and load condi-
tions vary. Typical efficiency is 25% higher than that of a
low dropout (LDO) linear regulator.
Regulation is achieved by sensing the output voltage and
enabling the internal switching network as needed to
maintain a fixed output voltage. This method of regulation
enables the parts to achieve high efficiency at extremely
light loads. Low operating current (25µA with no load, 5µA
in shutdown) and low external parts count (two 1µF flying
capacitors and two 10µF bypass capacitors) make the
LTC1503-1.8/LTC1503-2 ideally suited for space con-
strained battery-powered applications. The parts are fully
short-circuit and overtemperature protected.
The LTC1503-1.8/LTC1503-2 are available in 8-pin MSOP
and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
Cellular Phones
Handheld Computers
Smart Card Readers
Low Power DSP Supplies
Portable Electronic Equipment
Handheld Medical Instruments
TYPICAL APPLICATIO
Single Li-Ion to 2V DC/DC Converter
80
4
1-CELL Li-Ion OR
3-CELL NiMH
10µF
1µF
2
V
IN
V
OUT
1
10µF
1µF
8
C1
C2
3
6
C1
+
C2
+
5
7
SHDN/SS GND
V
OUT
= 2V
I
OUT
= 100mA
EFFICIENCY (%)
LTC1503-2
1503-1.8/2 TA01
U
Efficiency vs Input Voltage
100
I
OUT
= 100mA
I
OUT
= 1mA
60
“IDEAL” LDO
40
LTC1503-2
V
OUT
= 2V
20
2
3
4
INPUT VOLTAGE (V)
1503-1.8/2 TA02
U
U
5
6
1

LTC1503IS8-1.8 Related Products

LTC1503IS8-1.8 LTC1503IS8-2 LTC1503CS8-1.8 LTC1503CS8-2 LTC1503-2
Description High Efficiency Inductorless Step-Down DC/DC Converters High Efficiency Inductorless Step-Down DC/DC Converters High Efficiency Inductorless Step-Down DC/DC Converters High Efficiency Inductorless Step-Down DC/DC Converters High Efficiency Inductorless Step-Down DC/DC Converters
Brand Name Linear Technology Linear Technology Linear Technology Linear Technology -
Is it Rohs certified? incompatible incompatible incompatible incompatible -
Maker Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) Linear ( ADI ) -
Parts packaging code SOIC SOIC SOIC SOIC -
package instruction 0.150 INCH, PLASTIC, SOP-8 SOP, SOP8,.25 0.150 INCH, PLASTIC, SOP-8 SOP, SOP8,.25 -
Contacts 8 8 8 8 -
Manufacturer packaging code S8 S8 S8 S8 -
Reach Compliance Code _compli _compli _compli _compli -
ECCN code EAR99 EAR99 EAR99 EAR99 -
Analog Integrated Circuits - Other Types DC-DC REGULATED POWER SUPPLY MODULE DC-DC REGULATED POWER SUPPLY MODULE DC-DC REGULATED POWER SUPPLY MODULE DC-DC REGULATED POWER SUPPLY MODULE -
Maximum input voltage 6 V 6 V 6 V 6 V -
Minimum input voltage 2.4 V 2.4 V 2.4 V 2.4 V -
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 R-PDSO-G8 -
JESD-609 code e0 e0 e0 e0 -
length 4.9 mm 4.9 mm 4.9 mm 4.9 mm -
Humidity sensitivity level 1 1 1 1 -
Number of functions 1 1 1 1 -
Output times 1 1 1 1 -
Number of terminals 8 8 8 8 -
Maximum operating temperature 85 °C 85 °C 70 °C 70 °C -
Maximum output current 0.1 A 0.1 A 0.1 A 0.1 A -
Maximum output voltage 1.872 V 2.08 V 1.872 V 2.08 V -
Minimum output voltage 1.728 V 1.92 V 1.728 V 1.92 V -
Nominal output voltage 1.8 V 2 V 1.8 V 2 V -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code SOP SOP SOP SOP -
Encapsulate equivalent code SOP8,.25 SOP8,.25 SOP8,.25 SOP8,.25 -
Package shape RECTANGULAR RECTANGULAR RECTANGULAR RECTANGULAR -
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE -
Peak Reflow Temperature (Celsius) 235 235 235 235 -
Certification status Not Qualified Not Qualified Not Qualified Not Qualified -
Maximum seat height 1.75 mm 1.75 mm 1.75 mm 1.75 mm -
surface mount YES YES YES YES -
technology CMOS CMOS CMOS CMOS -
Temperature level INDUSTRIAL INDUSTRIAL COMMERCIAL COMMERCIAL -
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb) -
Terminal form GULL WING GULL WING GULL WING GULL WING -
Terminal pitch 1.27 mm 1.27 mm 1.27 mm 1.27 mm -
Terminal location DUAL DUAL DUAL DUAL -
Maximum time at peak reflow temperature 20 20 20 20 -
Fine-tuning/adjustable output NO NO NO NO -
width 3.9 mm 3.9 mm 3.9 mm 3.9 mm -
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