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LTC3417EFE

Description
Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 20-Pin TSSOP EP
File Size376KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
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LTC3417EFE Overview

Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 20-Pin TSSOP EP

LTC3417EFE Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
SVHCYes
SVHC Exceeds ThresholdYes
TypeSynchronous Step Down
Output TypeAdjustable
Switching Frequency (kHz)1200 to 4000
Switching RegulatorYes
Number of Outputs2
Output Voltage (V)0.8 to 5
Maximum Output Current (A)1.4(Min)|0.8(Min)
Minimum Input Voltage (V)2.25
Maximum Input Voltage (V)5.5
Operating Supply Voltage (V)2.25 to 5.5
Typical Switch Current (A)2.25|1.2
Typical Quiescent Current (uA)125
Line Regulation0.2%/V
Load Regulation0.2%
Efficiency (%)95
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeExtended
Pin Count20
Standard Package NameSOP
Supplier PackageTSSOP EP
MountingSurface Mount
Package Height1.05(Max)
Package Length6.6(Max)
Package Width4.5(Max)
PCB changed20
Lead ShapeGull-wing
FEATURES
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LTC3417
Dual Synchronous
1.4A/800mA 4MHz
Step-Down DC/DC Regulator
DESCRIPTION
The LTC
®
3417 is a dual constant frequency, synchronous
step-down DC/DC converter. Intended for medium power
applications, it operates from a 2.25V to 5.5V input volt-
age range and has a constant programmable switching
frequency, allowing the use of tiny, low cost capacitors
and inductors 2mm or less in height. Each output voltage
is adjustable from 0.8V to 5V. Internal synchronous low
R
DS(ON)
power switches provide high efficiency without
the need for external Schottky diodes.
A user selectable mode input allows the user to trade
off ripple voltage for light load efficiency. Burst Mode
®
operation provides high efficiency at light loads, while
Pulse Skip mode provides low ripple noise at light loads.
A phase mode pin allows the second channel to operate
in-phase or 180° out-of-phase with respect to channel 1.
Out-of-phase operation produces lower RMS current on
V
IN
and thus lower RMS derating on the input capacitor.
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
125μA. In shutdown, the device draws <1μA.
L,
LT, LTC, LTM and Burst Mode 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, 6144194.
High Efficiency: Up to 95%
1.4A/800mA Guaranteed Minimum Output Current
No Schottky Diodes Required
Programmable Frequency Operation: 1.5MHz or
Adjustable From 0.6MHz to 4MHz
Low R
DS(ON)
Internal Switches
Short-Circuit Protected
V
IN
: 2.25V to 5.5V
Current Mode Operation for Excellent Line and
Load Transient Response
125μA Quiescent Current in Sleep Mode
Ultralow Shutdown Current: I
Q
< 1μA
Low Dropout Operation: 100% Duty Cycle
Power Good Output
Phase Pin Selects 2nd Channel Phase Relationship
with Respect to 1st Channel
Internal Soft-Start with Individual Run Pin Control
Available in Small Thermally Enhanced
(5mm
×
3mm) DFN and 20-Lead TSSOP Packages
APPLICATIONS
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PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
PC Cards
Wireless and DSL Modems
TYPICAL APPLICATION
V
IN
2.5V TO 5.5V
10μF
V
OUT1
1.8V
1.4A
1.5μH
22pF
V
IN
511k
V
FB1
22μF
412k
I
TH1
5.9k
2200pF
GND
I
TH2
2.87k
6800pF
3417 TA01
OUT2 Efficiency
(Burst Mode Operation)
100
REFER TO FIGURE 4
10
95
2.2μH
EFFICIENCY (%)
V
IN
FREQ
SW1
RUN1
LTC3417
V
FB2
SW2
RUN2
V
IN
866k
412k
10μF
V
OUT2
2.5V
800mA
1
EFFICIENCY
POWER LOSS (W)
90
0.1
85
0.01
80
75
70
0.001
POWER LOSS
V
IN
= 3.6V
V
OUT
= 2.5V
FREQ = 1MHz
0.01
0.1
LOAD CURRENT (A)
1
3417 TA01a
22pF
0.001
0.0001
3417fd
1

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Description Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 20-Pin TSSOP EP Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 16-Pin DFN EP Tube Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 16-Pin DFN EP T/R Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 16-Pin DFN EP T/R Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 16-Pin DFN EP Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 20-Pin TSSOP EP Tube Conv DC-DC 2.25V to 5.5V Synchronous Step Down Dual-Out 0.8V to 5V 1.4A/0.8A 20-Pin TSSOP EP T/R
EU restricts the use of certain hazardous substances Not Compliant Compliant Not Compliant Compliant Not Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Unconfirmed Active Unconfirmed Active Unconfirmed Active Active
Type Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down Synchronous Step Down
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Switching Frequency (kHz) 1200 to 4000 1200 to 4000 1200 to 4000 1200 to 4000 1200 to 4000 1200 to 4000 1200 to 4000
Switching Regulator Yes Yes Yes Yes Yes Yes Yes
Number of Outputs 2 2 2 2 2 2 2
Output Voltage (V) 0.8 to 5 0.8 to 5 0.8 to 5 0.8 to 5 0.8 to 5 0.8 to 5 0.8 to 5
Maximum Output Current (A) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min) 1.4(Min)|0.8(Min)
Minimum Input Voltage (V) 2.25 2.25 2.25 2.25 2.25 2.25 2.25
Maximum Input Voltage (V) 5.5 5.5 5.5 5.5 5.5 5.5 5.5
Operating Supply Voltage (V) 2.25 to 5.5 2.25 to 5.5 2.25 to 5.5 2.25 to 5.5 2.25 to 5.5 2.25 to 5.5 2.25 to 5.5
Typical Switch Current (A) 2.25|1.2 2.25|1.2 1.2|2.25 2.25|1.2 2.25|1.2 2.25|1.2 2.25|1.2
Typical Quiescent Current (uA) 125 125 125 125 125 125 125
Line Regulation 0.2%/V 0.2%/V 0.2%/V 0.2%/V 0.2%/V 0.2%/V 0.2%/V
Load Regulation 0.2% 0.2% 0.2% 0.2% 0.2% 0.2% 0.2%
Efficiency (%) 95 95 95 95 95 95 95
Minimum Operating Temperature (°C) -40 -40 -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 85 85 85 85 85 85 85
Supplier Temperature Grade Extended Extended Extended Extended Extended Extended Extended
Pin Count 20 16 16 16 16 20 20
Standard Package Name SOP DFN DFN DFN DFN SOP SOP
Supplier Package TSSOP EP DFN EP DFN EP DFN EP DFN EP TSSOP EP TSSOP EP
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 1.05(Max) 0.75(Max) 0.75(Max) 0.75(Max) 0.75(Max) 1.05(Max) 1.05(Max)
Package Length 6.6(Max) 5 5 5 5 6.6(Max) 6.6(Max)
Package Width 4.5(Max) 3 3 3 3 4.5(Max) 4.5(Max)
PCB changed 20 16 16 16 16 20 20
Lead Shape Gull-wing No Lead No Lead No Lead No Lead Gull-wing Gull-wing
Packaging - Tube Tape and Reel Tape and Reel - Tube Tape and Reel
HTS - - 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
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