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LTC3425EUH#PBF

Description
Conv DC-DC 0.5V to 4.5V Synchronous Step Up Single-Out 2.4V to 5.25V 3A Automotive 32-Pin QFN EP Tube
File Size304KB,24 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LTC3425EUH#PBF Overview

Conv DC-DC 0.5V to 4.5V Synchronous Step Up Single-Out 2.4V to 5.25V 3A Automotive 32-Pin QFN EP Tube

LTC3425EUH#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSynchronous Step Up
Output TypeAdjustable
Switching Frequency (kHz)100 to 2000
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)2.4 to 5.25
Maximum Output Current (A)3
Minimum Input Voltage (V)0.5
Maximum Input Voltage (V)4.5
Operating Supply Voltage (V)0.5 to 4.5
Typical Quiescent Current (uA)1800
Efficiency (%)95
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count32
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length5
Package Width5
PCB changed32
Lead ShapeNo Lead
FEATURES
s
s
s
LTC3425
5A, 8MHz, 4-Phase
Synchronous Step-Up
DC/DC Converter
DESCRIPTIO
The LTC
®
3425 is a synchronous, 4-phase boost converter
with output disconnect capable of operation below 1V
input. It includes four N-channel MOSFET switches and
four P-channel synchronous rectifiers for an effective
R
DS(ON)
of 0.045Ω and 0.05Ω, respectively. 4-phase
operation greatly reduces peak inductor currents, and
capacitor ripple current, and increases effective switching
frequency, minimizing inductor and capacitor sizes. True
output disconnect eliminates inrush current and allows
zero load current in shutdown. External Schottky diodes
are not required in most applications (V
OUT
< 4.3V). Power
saving Burst Mode operation can be user controlled or left
in automatic mode.
Other features include 1µA shutdown current, program-
mable frequency with sync in and out, programmable
soft-start, antiringing control, thermal shutdown, adjust-
able current limit, reference output and power good
comparator.
The LTC3425 is available in a small, thermally enhanced
32-pin QFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
s
s
s
s
s
s
s
s
s
s
s
s
s
High Efficiency: Up to 95%
Up to 3A Continuous Output Current
4-Phase Operation for Low Output Ripple
and Tiny Solution Size
Output Disconnect and Inrush Current Limiting
Very Low Quiescent Current: 12µA
0.5V to 4.5V Input Range
2.4V to 5.25V Adjustable Output Voltage
Adjustable Current Limit
Adjustable, Fixed Frequency Operation from
100kHz to 2MHz per Phase
Synchronizable Oscillator with Sync Output
Internal Synchronous Rectifiers
Manual or Automatic Burst Mode
®
Operation
Power Good Comparator
<1µA Shutdown Current
Antiringing Control
5mm
×
5mm Thermally Enhanced QFN Package
APPLICATIO S
s
s
s
Handheld Computers
Point-of-Load Regulators
3.3V to 5V Conversion
TYPICAL APPLICATIO
V
IN
2V TO 3V
2.2µF
2.7µH
2.7µH
2.7µH
2.7µH
V
IN
OFF ON
SHDN
REFOUT
CCM
REFEN
SYNCIN
BURST
0.01µF
15k
20k
75k
R
T
I
LIM
SGND
SWA
SWB
SWC
EFFICIENCY (%)
SWD
V
OUTS
V
OUTA
V
OUTB
V
OUTC
V
OUTD
4.7µF
×4
1M
10k
V
OUT
3.3V
2A
LTC3425
FB
COMP
SS
SYNCOUT
PGOOD
GNDC GNDD
22pF
330pF
33k
0.01µF
3425 TA01
590k
GNDA
GNDB
C
IN
: TAIYO YUDEN JMK107BJ225MA
C
OUT
: TAIYO YUDEN JMK212BJ475MG (×4)
L1-L4: TDK RLF5018T-2R7M1R8
3425f
U
U
U
100
90
80
70
60
50
40
30
V
IN
= 2.4V
V
OUT
= 3.3V
10 f = 1MHz/PHASE
L = 2.7µH
0
1
10
100
1000
0.1
LOAD CURRENT (mA)
20
Burst Mode
OPERATION
FIXED
FREQUENCY
MODE
10000
3425 TA02
1

LTC3425EUH#PBF Related Products

LTC3425EUH#PBF LTC3425EUH#TRPBF LTC3425EUH
Description Conv DC-DC 0.5V to 4.5V Synchronous Step Up Single-Out 2.4V to 5.25V 3A Automotive 32-Pin QFN EP Tube Conv DC-DC 0.5V to 4.5V Synchronous Step Up Single-Out 2.4V to 5.25V 3A Automotive 32-Pin QFN EP T/R Conv DC-DC 0.5V to 4.5V Synchronous Step Up Single-Out 2.4V to 5.25V 3A Automotive 32-Pin QFN EP
EU restricts the use of certain hazardous substances Compliant Compliant Not Compliant
ECCN (US) EAR99 EAR99 EAR99
Part Status Active Active Unconfirmed
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01
Type Synchronous Step Up Synchronous Step Up Synchronous Step Up
Output Type Adjustable Adjustable Adjustable
Switching Frequency (kHz) 100 to 2000 100 to 2000 100 to 2000
Switching Regulator Yes Yes Yes
Number of Outputs 1 1 1
Output Voltage (V) 2.4 to 5.25 2.4 to 5.25 2.4 to 5.25
Maximum Output Current (A) 3 3 3
Minimum Input Voltage (V) 0.5 0.5 0.5
Maximum Input Voltage (V) 4.5 4.5 4.5
Operating Supply Voltage (V) 0.5 to 4.5 0.5 to 4.5 0.5 to 4.5
Typical Quiescent Current (uA) 1800 1800 1800
Efficiency (%) 95 95 95
Minimum Operating Temperature (°C) -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85
Supplier Temperature Grade Extended Extended Extended
Pin Count 32 32 32
Standard Package Name QFN QFN QFN
Supplier Package QFN EP QFN EP QFN EP
Mounting Surface Mount Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max) 0.75(Max)
Package Length 5 5 5
Package Width 5 5 5
PCB changed 32 32 32
Lead Shape No Lead No Lead No Lead
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