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LTC3407EDD-3#PBF

Description
Conv DC-DC 3.3V to 5.5V Synchronous Step Down Dual-Out 1.8V/3.3V 0.8A/0.8A 10-Pin DFN EP Tube
File Size259KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3407EDD-3#PBF Overview

Conv DC-DC 3.3V to 5.5V Synchronous Step Down Dual-Out 1.8V/3.3V 0.8A/0.8A 10-Pin DFN EP Tube

LTC3407EDD-3#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
TypeSynchronous Step Down
Output TypeFixed
Switching Frequency (kHz)2700
Switching RegulatorYes
Number of Outputs2
Output Voltage (V)3.3|1.8
Maximum Output Current (A)0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8
Minimum Input Voltage (V)3.3
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)3.3 to 5.5
Typical Quiescent Current (uA)40
Line Regulation0.5%/V
Load Regulation0.5%(Typ)
Efficiency (%)95
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
PackagingTube
Pin Count10
Standard Package NameDFN
Supplier PackageDFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length3
Package Width3
PCB changed10
Lead ShapeNo Lead
FEATURES
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LTC3407-3
Dual Synchronous,
1.8V/0.8A and 3.3V/0.8A
2.25MHz Step-Down DC/DC Regulator
DESCRIPTION
The LTC
®
3407-3 is a dual, constant frequency, synchro-
nous step down DC/DC converter. Intended for low power
applications, it operates from 3.3V to 5.5V input voltage
range and has a constant 2.25MHz switching frequency,
allowing the use of tiny, low cost capacitors and inductors
with a profile ≤1.0mm. Internal synchronous 0.35Ω, 1.2A
power switches provide high efficiency without the need
for external Schottky diodes.
A user selectable mode input is provided to allow the user
to trade-off noise ripple for low power efficiency. Burst
Mode
®
operation provides high efficiency at light loads,
while pulse-skipping mode provides low noise ripple at
light loads.
To further maximize battery life, the P-channel MOSFETs
are turned on continuously in dropout (100% duty cycle),
and both channels draw a total quiescent current of only
40μA. In shutdown, the device draws <1μA.
L,
LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 5481178, 6580258, 6304066, 6127815, 6498466,
6611131.
Very Low Quiescent Current: Only 40μA
1.8V at 800mA/3.3V at 800mA
High Efficiency: Up to 95%
2.25MHz Constant Frequency Operation
High Switch Current: 1.2A on Each Channel
No Schottky Diodes Required
Low R
DS(ON)
Internal Switches: 0.35Ω
V
IN
: 3.3V to 5.5V
Current Mode Operation for Excellent Line
and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: I
Q
< 1μA
Power-On Reset Output
Externally Synchronizable Oscillator
Small Thermally Enhanced 3mm
×
3mm DFN Package
APPLICATIONS
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PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems
TYPICAL APPLICATION
LTC3407-3 Efficiency/Power Loss
100
V
IN
3.3V TO 5.5V
10μF
RUN2
V
IN
RUN1
POR
SW1
V
OUT1
GND
MODE/SYNC
V
OUT2
3.3V
2.2μH
SW2
10μF
V
OUT2
LTC3407-3
100k
EFFICIENCY (%)
RESET
2.2μH
V
OUT1
1.8V
10μF
34073 TA01
1
V
OUT
= 3.3V
V
OUT
= 1.8V
90
80
70
60
50
40
30
20
10
1
0.1
POWER LOSS (W)
V
OUT
= 3.3V
V
OUT
= 1.8V
0.01
0.001
V
IN
= 5V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
10
100
LOAD CURRENT (mA)
NOTE: IN DROPOUT, THE OUTPUT TRACKS THE INPUT VOLTAGE
Figure 1. 1.8V/3.3V at 800mA Step-Down Regulators
0.000
1000
34073 TA01b
34073fb
1

LTC3407EDD-3#PBF Related Products

LTC3407EDD-3#PBF LTC3407EDD-3#TRPBF
Description Conv DC-DC 3.3V to 5.5V Synchronous Step Down Dual-Out 1.8V/3.3V 0.8A/0.8A 10-Pin DFN EP Tube Conv DC-DC 3.3V to 5.5V Synchronous Step Down Dual-Out 1.8V/3.3V 0.8A/0.8A 10-Pin DFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
Type Synchronous Step Down Synchronous Step Down
Output Type Fixed Fixed
Switching Frequency (kHz) 2700 2700
Switching Regulator Yes Yes
Number of Outputs 2 2
Output Voltage (V) 3.3|1.8 1.8|3.3
Maximum Output Current (A) 0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8 0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8|0.8
Minimum Input Voltage (V) 3.3 3.3
Maximum Input Voltage (V) 5.5 5.5
Operating Supply Voltage (V) 3.3 to 5.5 3.3 to 5.5
Typical Quiescent Current (uA) 40 40
Line Regulation 0.5%/V 0.5%/V
Load Regulation 0.5%(Typ) 0.5%(Typ)
Efficiency (%) 95 95
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Extended Extended
Packaging Tube Tape and Reel
Pin Count 10 10
Standard Package Name DFN DFN
Supplier Package DFN EP DFN EP
Mounting Surface Mount Surface Mount
Package Height 0.75(Max) 0.75(Max)
Package Length 3 3
Package Width 3 3
PCB changed 10 10
Lead Shape No Lead No Lead
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