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LT3439EFE#TR

Description
Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP T/R
File Size185KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT3439EFE#TR Overview

Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP T/R

LT3439EFE#TR 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)20 to 250
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)2.8(Min)
Maximum Output Current (A)1.65
Minimum Input Voltage (V)2.8
Maximum Input Voltage (V)17.5
Operating Supply Voltage (V)2.8 to 17.5
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)125
Supplier Temperature GradeExtended
PackagingTape and Reel
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
LT3439
Slew Rate Controlled
Ultralow Noise1A Isolated
DC/DC Transformer Driver
FEATURES
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
Reduced Conducted and Radiated EMI
Single Resistor Control of Output Switch Voltage
and Current Slew Rates
Cross Conduction Prevention Circuitry
Two 1A Current Limited Power Switches
Low Minimum Supply Voltage: 2.8V
Low Shutdown Current: < 20µA
50% Duty Cycle
20kHz to 250kHz Oscillator Frequency
Synchronizable to 300kHz
Overcurrent and Overtemperature Protected
The LT
®
3439 is a push-pull DC/DC transformer driver that
reduces conducted and radiated electromagnetic interfer-
ence (EMI). Ultralow noise and EMI are achieved by
controlling the output switch voltage and current slew
rates. Slew rates are user adjustable to optimize output
noise versus efficiency. The LT3439 can reduce high
frequency harmonic content by as much as 40dB with only
a minor decrease in efficiency.
The LT3439 includes two 1A current limited power switches
to ensure start-up under heavy loads. It also includes an
oscillator that can be synchronized to an external clock for
more accurate placement of switcher harmonics. Protec-
tion features include current limiting, undervoltage lock-
out, thermal shutdown and cross conduction prevention
circuitry.
The LT3439 is available in a thermally enhanced 16-pin
TSSOP with an exposed backside.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
Low Noise Isolated Supplies
Radio and Telecom Supplies
Distributed Supplies
Medical Instruments
Precision Instruments
Low Noise Filament Supplies
TYPICAL APPLICATIO
Low Noise 5V to 5V Push-Pull DC/DC Transformer
5V Output Noise
OPTIONAL
V
IN
5V
T1
C
IN
22µF
10V
13
11
5
6
680pF 7
16.9k
V
IN
SHDN
SYNC
C
T
R
T
GND
10
R
SL
PGND
1, 16
3439 TA01
D1
A
C1
47µF
6.3V
L1 33µH
C2
47µF
6.3V
B
3
V
OUT
5V
500mA
COL A
LT3439
COL B
14
4
34k
B
200µV/DIV
D2
C
IN
: MURATA GRM235Y5V226Z10
C1, C2: TDK C4532X5R0J476M
D1, D2: MBR0520
L1: TDK SLF6028T-330MR69
T1: COILTRONICS 15835
A
20mV/DIV
U
5µs/DIV
3439 TA01b
U
U
sn3439 3439fs
1

LT3439EFE#TR Related Products

LT3439EFE#TR LT3439EFE#PBF LT3439EFE#TRPBF LT3439EFE
Description Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP T/R Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP Tube Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP T/R Conv DC-DC 2.8V to 17.5V Step Down Single-Out 2.8V 1.65A 16-Pin TSSOP EP
EU restricts the use of certain hazardous substances Not Compliant Compliant Compliant Not Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed Active Active Unconfirmed
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Type Step Down Step Down Step Down Step Down
Output Type Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 20 to 250 20 to 250 20 to 250 20 to 250
Switching Regulator Yes Yes Yes Yes
Number of Outputs 1 1 1 1
Output Voltage (V) 2.8(Min) 2.8(Min) 2.8(Min) 2.8(Min)
Maximum Output Current (A) 1.65 1.65 1.65 1.65
Minimum Input Voltage (V) 2.8 2.8 2.8 2.8
Maximum Input Voltage (V) 17.5 17.5 17.5 17.5
Operating Supply Voltage (V) 2.8 to 17.5 2.8 to 17.5 2.8 to 17.5 2.8 to 17.5
Minimum Operating Temperature (°C) -40 -40 -40 -40
Maximum Operating Temperature (°C) 125 125 125 125
Supplier Temperature Grade Extended Extended Extended Extended
Pin Count 16 16 16 16
Standard Package Name SOP SOP SOP SOP
Supplier Package TSSOP EP TSSOP EP TSSOP EP TSSOP EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 0.95(Max) 0.95(Max) 0.95(Max) 0.95(Max)
Package Length 5.1(Max) 5.1(Max) 5.1(Max) 5.1(Max)
Package Width 4.5(Max) 4.5(Max) 4.5(Max) 4.5(Max)
PCB changed 16 16 16 16
Lead Shape Gull-wing Gull-wing Gull-wing Gull-wing
Packaging Tape and Reel Tube Tape and Reel -
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