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LT3434EFE#TR

Description
Switching Regulator LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100- A Quiescent Current
CategoryPower/power management    The power supply circuit   
File Size377KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT3434EFE#TR Overview

Switching Regulator LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100- A Quiescent Current

LT3434EFE#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instruction4.4 MM, PLASTIC, TSSOP-16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage60 V
Minimum input voltage3.3 V
Nominal input voltage12 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
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 frequency230 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
Base Number Matches1
LT3434
High Voltage 3A, 200kHz
Step-Down Switching Regulator
with 100µA Quiescent Current
FEATURES
DESCRIPTIO
Wide Input Range: 3.3V to 60V
3A Peak Switch Current
Burst Mode
®
Operation: 100µA Quiescent Current**
Low Shutdown Current: I
Q
< 1µA
Power Good Flag with Programmable Threshold
Load Dump Protection to 60V
200kHz Switching Frequency
Saturating Switch Design: 0.1Ω
Peak Switch Current Maintained Over
Full Duty Cycle Range*
1.25V Feedback Reference Voltage
Easily Synchronizable
Soft-Start Capability
Small 16-Pin Thermally Enhanced TSSOP Package
The LT
®
3434 is a 200kHz monolithic buck switching
regulator that accepts input voltages up to 60V. A high
efficiency 3A, 0.1Ω switch is included on the die along with
all the necessary oscillator, control and logic circuitry.
Current mode topology is used for fast transient response
and good loop stability.
Innovative design techniques integrated in a new high
voltage process achieve high efficiency over a wide input
range. Efficiency is maintained over a wide output current
range by employing Burst Mode operation at low currents,
utilizing the output to bias the internal circuitry, and by
using a supply boost capacitor to fully saturate the power
switch. Patented circuitry maintains peak switch current
over the full duty cycle range.* Shutdown reduces input
supply current to less than 1µA. External synchronization
can be implemented by driving the SYNC pin with logic-level
inputs. A single capacitor from the C
SS
pin to the output
provides a controlled output voltage ramp (soft-start). The
device also has a power good flag with a programmable
threshold and time-out, and thermal shutdown protection.
The LT3434 is available in a 16-pin TSSOP package with
Exposed Pad leadframe for low thermal resistance.
APPLICATIO S
High Voltage Power Conversion
14V and 42V Automotive Systems
Industrial Power Systems
Distributed Power Systems
Battery-Powered Systems
, LTC and LT are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Burst Mode is a registered
trademark of Linear Technology Corporation. *Protected by U.S. Patents including
6498466. **See Burst Mode Operation section for conditions.
TYPICAL APPLICATIO
14V to 3.3V Step-Down Converter with
100µA No Load Quiescent Current
4.7µF
100V
CER
0.68µF 33µH
SW
0.1µF
C
SS
V
BIAS
FB
1µF
C
T
SYNC
GND
PGFB
PG
100k
1%
27pF
165k
1%
100µF
6.3V
TANT
30MQ100
4148
SUPPLY CURRENT (µA)
Supply Current vs
Input Voltage
150
V
OUT
= 3.3V
100
V
IN
V
IN
SHDN
BOOST
LT3434
V
OUT
3.3V
2A
125
75
EFFICIENCY (%)
100
75
50
25
0
V
C
4700pF
10k
470pF
3434 TA01
0
10
30
40
20
INPUT VOLTAGE (V)
50
60
3434 TA02a
U
Efficiency and Power Loss
vs Load Current
V
IN
= 12V
EFFICIENCY
1
POWER LOSS (W)
V
OUT
= 3.3V
50
TYPICAL POWER
LOSS
25
0.01
0.1
10
V
OUT
= 5V
0
0.0001
0.001
0.1
0.01
LOAD CURRENT (A)
1
0.001
10
3434 TA02b
U
U
3434fb
1

LT3434EFE#TR Related Products

LT3434EFE#TR LT3434IFE#TR
Description Switching Regulator LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100- A Quiescent Current Switching Voltage Regulators LT3434 - High Voltage 3A, 200kHz Step-Down Switching Regulator with 100- A Quiescent Current
Is it Rohs certified? incompatible incompatible
Maker ADI ADI
package instruction 4.4 MM, PLASTIC, TSSOP-16 HTSSOP,
Reach Compliance Code not_compliant not_compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE
Maximum input voltage 60 V 60 V
Minimum input voltage 3.3 V 3.3 V
Nominal input voltage 12 V 12 V
JESD-30 code R-PDSO-G16 R-PDSO-G16
JESD-609 code e0 e0
length 5 mm 5 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 16 16
Maximum operating temperature 125 °C 125 °C
Maximum output current 6.5 A 6.5 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HTSSOP HTSSOP
Package shape RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 235
Certification status Not Qualified Not Qualified
Maximum seat height 1.1 mm 1.1 mm
surface mount YES YES
Switch configuration BUCK BUCK
Maximum switching frequency 230 kHz 230 kHz
Temperature level OTHER AUTOMOTIVE
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING
Terminal pitch 0.65 mm 0.65 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 20 20
width 4.4 mm 4.4 mm
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