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LT3430EFE

Description
High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators
CategoryPower/power management    The power supply circuit   
File Size312KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LT3430EFE Overview

High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators

LT3430EFE Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeTSSOP
package instruction4.40 MM, PLASTIC, TSSOP-16
Contacts16
Manufacturer packaging codeFE
Reach Compliance Code_compli
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage60 V
Minimum input voltage5.5 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length5 mm
Humidity sensitivity level1
Number of functions1
Number of terminals16
Maximum operating temperature125 °C
Minimum operating temperature
Maximum output current6.5 A
Package body materialPLASTIC/EPOXY
encapsulated codeHTSSOP
Encapsulate equivalent codeTSSOP16,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency228 kHz
Temperature levelOTHER
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width4.4 mm
FEATURES
LT3430/LT3430-1
High Voltage, 3A,
200kHz/100kHz Step-Down
Switching Regulators
DESCRIPTION
The LT
®
3430/LT3430-1 are monolithic buck switching
regulators that accept input voltages up to 60V. A high ef-
ficiency 3A, 0.1Ω switch is included on the die along with
all the necessary oscillator, control and logic circuitry. A
current mode architecture provides fast transient response
and excellent loop stability.
Special design techniques and a new high voltage process
achieve high efficiency over a wide input range. Efficiency
is maintained over a wide output current range by using
the output to bias the circuitry and by utilizing a supply
boost capacitor to saturate the power switch. Patented
circuitry* maintains peak switch current over the full duty
cycle range. A shutdown pin reduces supply current to
30µA and a SYNC pin can be externally synchronized with
a logic level input from 228kHz to 700kHz for the LT3430
or from 125kHz to 250kHz for the LT3430-1.
The LT3430/LT3430-1 are available in a thermally enhanced
16-pin TSSOP package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
*US Patent # 6498466
Wide Input Range: 5.5V to 60V
3A Peak Switch Current over All Duty Cycles
Constant Switching Frequency:
200kHz (LT3430)
100kHz (LT3430-1)
0.1Ω Switch Resistance
Current Mode
Effective Supply Current: 2.5mA
Shutdown Current: 30µA
1.2V Feedback Reference Voltage
Easily Synchronizable
Cycle-by-Cycle Current Limiting
Small, 16-Pin Thermally Enhanced TSSOP Package
APPLICATIONS
Industrial and Automotive Power Supplies
Portable Computers
Battery Chargers
Distributed Power Systems
TYPICAL APPLICATION
5V, 2A Buck Converter
MMSD914TI
Efficiency vs Load Current
100
V
OUT
= 5V
V
IN
= 12V
V
IN
4.7µF
100V
OFF ON
LT3430**
SHDN
SYNC
GND
SW
30BQ060
EFFICIENCY (%)
V
IN
5.5V*
TO 60V
BOOST
0.68µF
22µH
V
OUT
5V
2A
90
80
V
IN
= 42V
+
15.4k
FB
V
C
4.99k
BIAS
100µF 10V
SOLID
TANTALUM
70
60
LT3430-1 L = 68µH
LT3430 L =27µH
50
220pF
0
0.5
1.5
2.0
1.0
LOAD CURRENT (A)
2.5
3430 TA02
3.3k
0.022µF
3430 TA01
*FOR INPUT VOLTAGES BELOW 7.5V, SOME RESTRICTIONS MAY APPLY
** SEE LT3430-1 CIRCUIT IN APPLICATIONS INFORMATION SECTION
34301fa
1

LT3430EFE Related Products

LT3430EFE LT3430-1 LT3430 LT3430IFE
Description High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators High Voltage, 3A,200kHz/100kHz Step-Down Switching Regulators
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