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LT3502AIDC

Description
IC 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO10, 2 X 2 MM, PLASTIC, DFN-10, Switching Regulator or Controller
CategoryPower/power management    The power supply circuit   
File Size457KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric View All

LT3502AIDC Overview

IC 1.1 A SWITCHING REGULATOR, 2800 kHz SWITCHING FREQ-MAX, PDSO10, 2 X 2 MM, PLASTIC, DFN-10, Switching Regulator or Controller

LT3502AIDC Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
Parts packaging codeDFN
package instructionHVSON, SOLCC8,.08,20
Contacts10
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage40 V
Minimum input voltage3 V
Nominal input voltage10 V
JESD-30 codeS-PDSO-N10
JESD-609 codee0
length2 mm
Humidity sensitivity level1
Number of functions1
Number of terminals10
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Maximum output current1.1 A
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Encapsulate equivalent codeSOLCC8,.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 configurationBUCK
Maximum switching frequency2800 kHz
Temperature levelAUTOMOTIVE
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.45 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width2 mm
Base Number Matches1
LT3502/LT3502A
1.1MHz/2.2MHz, 500mA
Step-Down Regulators in
2mm
×
2mm DFN
FEATURES
DESCRIPTION
The LT
®
3502/LT3502A are current mode PWM step-down
DC/DC converters with an internal 500mA power switch,
in a tiny 8-lead 2mm
×
2mm DFN package. The wide input
voltage range of 3V to 40V makes the LT3502/LT3502A
suitable for regulating power from a wide variety of sources,
including 24V industrial supplies and automotive batteries.
Its high operating frequency allows the use of tiny, low
cost inductors and capacitors, resulting in a very small
solution. Constant frequency above the AM band avoids
interfering with radio reception, making the LT3502A
particularly suitable for automotive applications.
Cycle-by-cycle current limit and frequency foldback pro-
vide protection against shorted outputs. Soft-start and
frequency foldback eliminates input current surge during
start-up. DA current sense provides further protection in
fault conditions. An internal boost diode reduces com-
ponent count.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
3V to 40V Input Voltage Range
500mA Output Current
Switching Frequency: 2.2MHz (LT3502A),
1.1MHz (LT3502)
800mV Feedback Voltage
Short-Circuit Robust
Soft-Start
Low Shutdown Current: <2μA
Internally Compensated
Internal Boost Diode
Thermally Enhanced 2mm
×
2mm 8-Lead DFN
APPLICATIONS
Automotive Systems
Battery-Powered Equipment
Wall Transformer Regulation
Distributed Supply Regulation
TYPICAL APPLICATION
3.3V Step-Down Converter
90
V
IN
4.7V TO 40V
BD
V
IN
1μF
SW
LT3502A
DA
31.6k
OFF ON
SHDN
GND
FB
10k
10μF
BOOST
0.1μF 6.8μH
EFFICIENCY (%)
V
OUT
3.3V
500mA
80
5V
OUT
70
60
50
40
30
20
10
3502TA01a
LT3502A 12V
IN
Efficiency
3.3V
OUT
0
0
0.1
0.3
0.2
LOAD CURRENT (A)
0.4
0.5
3502 TA01b
3502f
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