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LTC3407EDD#PBF

Description
Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5V 0.6A/0.6A 10-Pin DFN EP Tube
File Size214KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC3407EDD#PBF Overview

Conv DC-DC 2.5V to 5.5V Synchronous Step Down Dual-Out 0.6V to 5V 0.6A/0.6A 10-Pin DFN EP Tube

LTC3407EDD#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)1200 to 1800
Switching RegulatorYes
Number of Outputs2
Output Voltage (V)0.6 to 5
Maximum Output Current (A)0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6|0.6
Minimum Input Voltage (V)2.5
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.5 to 5.5
Typical Quiescent Current (uA)40
Line Regulation0.5%/V
Load Regulation0.5%(Typ)
Efficiency (%)96
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
Dual Synchronous, 600mA,
1.5MHz Step-Down
DC/DC Regulator
DESCRIPTION
The LTC
®
3407 is a dual, constant frequency, synchronous
step down DC/DC converter. Intended for low power ap-
plications, it operates from 2.5V to 5.5V input voltage
range and has a constant 1.5MHz switching frequency,
allowing the use of tiny, low cost capacitors and inductors
2mm or less in height. Each output voltage is adjustable
from 0.6V to 5V. Internal synchronous 0.35Ω, 1A 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 ripple noise for low power efficiency. Burst
Mode
®
operation provides high efficiency at light loads,
while pulse-skipping mode provides low ripple noise 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.
High Efficiency: Up to 96%
Very Low Quiescent Current: Only 40μA
1.5MHz Constant Frequency Operation
High Switch Current: 1A on Each Channel
No Schottky Diodes Required
Low R
DS(ON)
Internal Switches: 0.35Ω
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
Output Voltages from 5V down to 0.6V
Power-On Reset Output
Externally Synchronizable Oscillator
Small Thermally Enhanced MSOP and 3mm
×
3mm
DFN Packages
APPLICATIONS
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PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
Wireless and DSL Modems
TYPICAL APPLICATION
V
IN
= 2.5V
TO 5.5V
C1
10μF
RUN2
V
IN
RUN1
POR
L1
2.2μH
SW1
C4, 22pF
R5
100k
RESET
EFFICIENCY (%)
LTC3407 Efficiency Curve
100
95
90
85
80
75
70
R1
442k
R2
887k
C2
10μF
65
60
1
V
IN
= 3.3V
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
10
100
LOAD CURRENT (mA)
1000
3407 TA02
2.5V
1.8V
MODE/SYNC
L2
2.2μH
SW2
C5, 22pF
LTC3407
V
OUT2
= 2.5V
AT 600mA
V
OUT1
= 1.8V
AT 600mA
C3
10μF
R4
887k
V
FB2
R3
280k
GND
V
FB1
C1, C2, C3: TAIYO YUDEN JMK316BJ106ML
L1, L2: MURATA LQH32CN2R2M33
3407 TA01
Figure 1. 2.5V/1.8V at 600mA Step-Down Regulators
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