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LT3434IFE

Description
Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP
File Size343KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Download user manual Parametric Compare View All

LT3434IFE Overview

Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP

LT3434IFE Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
HTS8542.39.00.01
SVHCYes
SVHC Exceeds ThresholdYes
TypeStep Down
Output TypeAdjustable
Switching Frequency (kHz)230
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)1.25 to 54
Maximum Output Current (A)6.5
Minimum Input Voltage (V)2.4
Maximum Input Voltage (V)60
Typical Quiescent Current (uA)3200
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeIndustrial
Pin Count16
Standard Package NameSOP
Supplier PackageTSSOP EP
MountingSurface Mount
Package Height0.95(Max)
Package Length5.1(Max)
Package Width4.5(Max)
PCB changed16
Lead ShapeGull-wing
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

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Description Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP Tube Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP T/R Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP Tube Conv DC-DC 2.4V to 60V Step Down Single-Out 1.25V to 54V 6.5A Automotive 16-Pin TSSOP EP T/R
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