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LTC3526EDC#TR

Description
LTC3526 - 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm x 2mm DFN; Package: DFN; Pins: 6; Temperature Range: -40°C to 85°C
CategoryPower/power management    The power supply circuit   
File Size240KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric View All

LTC3526EDC#TR Overview

LTC3526 - 500mA 1MHz Synchronous Step-Up DC/DC Converters in 2mm x 2mm DFN; Package: DFN; Pins: 6; Temperature Range: -40°C to 85°C

LTC3526EDC#TR Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeDFN
package instructionHVSON, SOLCC6,.08,20
Contacts6
Manufacturer packaging codeDC6
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Nominal input voltage1.2 V
JESD-30 codeS-PDSO-N6
JESD-609 codee0
length2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals6
Maximum operating temperature85 °C
Minimum operating temperature
Maximum output current0.5 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Encapsulate equivalent codeSOLCC6,.08,20
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height0.8 mm
surface mountYES
Switch configurationBOOST
Maximum switching frequency1300 kHz
technologyCMOS
Temperature levelOTHER
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width2 mm
NOT RECOMMENDED FOR NEW DESIGNS
Contact Linear Technology for Potential Replacement
LTC3526/LTC3526B
500mA 1MHz Synchronous
Step-Up DC/DC Converters
in 2mm
×
2mm DFN
DESCRIPTION
The LTC
®
3526/LTC3526B are synchronous, fixed frequency
step-up DC/DC converters with output disconnect. Syn-
chronous rectification enables high efficiency in the low
profile 2mm
×
2mm DFN package. Battery life in single
AA/AAA powered products is extended further with an
850mV start-up voltage and operation down to 500mV
once started.
A switching frequency of 1MHz minimizes solution foot-
print by allowing the use of tiny, low profile inductors and
ceramic capacitors. The current mode PWM design is
internally compensated, reducing external parts count. The
LTC3526 features automatic Burst Mode operation at light
load conditions, while the LTC3526B features continuous
switching at light loads. Anti-ringing control circuitry also
reduces EMI concerns by damping the inductor in discon-
tinuous mode. Additional features include a low shutdown
current of under 1μA and thermal shutdown.
The LTC3526/LTC3526B are housed in a 2mm
×
2mm
×
0.75mm DFN package.
For new designs, we recommend the LTC3526L/LTC3526LB.
L,
LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES
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n
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Delivers 3.3V at 100mA from a Single Alkaline/
NiMH Cell or 3.3V at 200mA from Two Cells
V
IN
Start-Up Voltage: 850mV
1.6V to 5.25V V
OUT
Range
Up to 94% Efficiency
Output Disconnect
1MHz Fixed Frequency Operation
V
IN
> V
OUT
Operation
Integrated Soft-Start
Current Mode Control with Internal Compensation
Automatic Burst Mode
®
Operation with 9μA
Quiescent Current (LTC3526)
Low Noise PWM Operation (LTC3526B)
Internal Synchronous Rectifier
Logic Controlled Shutdown (I
Q
< 1μA)
Anti-Ringing Control
Low Profile (2mm
×
2mm
×
0.75mm) DFN Package
APPLICATIONS
n
n
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Medical Instruments
Flash-Based MP3 Players
Noise Canceling Headphones
Wireless Mice
Bluetooth Headsets
TYPICAL APPLICATION
4.7μH
LTC3526 Efficiency and Power Loss vs Load Current
100
90
80
V
IN
= 2.4V
EFFICIENCY
100
POWER LOSS (mW)
1000
SW
V
IN
1.6V TO 3.2V
1μF
OFF ON
V
IN
V
OUT
1.78M
FB
1M
V
OUT
3.3V
200mA
4.7μF
EFFICIENCY (%)
70
60
50
40
30
20
0.1
POWER LOSS
1
10
LTC3526
SHDN
GND
3526 TA01a
10
0
0.01
0.1
1
10
100
0.01
1000
3526 TA01b
LOAD CURRENT (mA)
3526bfc
1
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