OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT3467IDDB

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
LT3467/LT3467A
1
3467afe
TYPICAL APPLICATION
DESCRIPTION
1.1A Step-Up DC/DC
Converter with
Integrated Soft-Start
The LT
®
3467/LT3467A switching regulators combine a
42V, 1.1A switch with a soft-start function. Pin compatible
with the LT1930, its low V
CESAT
bipolar switch enables the
device to deliver high current outputs in a small footprint.
The LT3467 switches at 1.3MHz, allowing the use of tiny,
low cost and low height inductors and capacitors. The
LT3467A switches at 2.1MHz, allowing the use of even
smaller components. High inrush current at start-up is
eliminated using the programmable soft-start function.
A single external capacitor sets the current ramp rate. A
constant frequency current mode PWM architecture results
in low, predictable output noise that is easy to fi lter.
The high voltage switch on the LT3467/LT3467A is rated
at 42V, making the devices ideal for boost converters up
to 40V as well as SEPIC and fl yback designs. The LT3467
can generate 5V at up to 540mA from a 3.3V supply or
5V at 450mA from four alkaline cells in a SEPIC design.
The LT3467A can generate 5V at up to 430mA from a 3.3V
supply or 15V at 135mA from a 3.3V supply. The LT3467/
LT3467A are available in a low profi le (1mm) 6-lead SOT-23
package and tiny 3mm × 2mm DFN package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Single Li-Ion Cell to 5V Boost Converter
FEATURES
APPLICATIONS
n
1.3MHz Switching Frequency (LT3467)
n
2.1MHz Switching Frequency (LT3467A)
n
Low V
CESAT
Switch: 330mV at 1.1A
n
High Output Voltage: Up to 40V
n
Wide Input Range: 2.4V to 16V
n
Dedicated Soft-Start Pin
n
5V at 540mA from 3.3V Input (LT3467)
n
5V at 430mA from 3.3V Input (LT3467A)
n
12V at 270mA from 5V Input (LT3467)
n
12V at 260mA from 5V Input (LT3467A)
n
Uses Small Surface Mount Components
n
Low Shutdown Current: <1μA
n
Pin-for-Pin Compatible with the LT1930 and LT1613
n
Low Profi le (1mm) ThinSOT
™
Package
n
Low Profi le (0.75mm) 8-Lead (3mm × 2mm)
DFN Package
n
Digital Cameras
n
White LED Power Supplies
n
Cellular Phones
n
Medical Diagnostic Equipment
n
Local 5V or 12V Supplies
n
TFT-LCD Bias Supplies
n
xDSL Power Supplies
GND
V
IN
SW
SS FB
V
IN
2.6V TO
4.2V
2.7μH
402k
LT3467
3467 TA01a
15μF
3.3pF
4.7μF
133k
V
OUT
5V
765mA AT V
IN
= 4.2V,
540mA AT V
IN
= 3.3V,
360mA AT V
IN
= 2.6V
SHDN
OFF ON
0.047μF
I
OUT
(mA)
EFFICIENCY (%)
600
95
90
85
80
75
70
65
60
55
50
3467 TA01b
100 900
200
300 400 500 700
800
V
IN
= 3.3V
V
IN
= 4.2V
V
IN
= 2.6V
Effi ciency
LT3467/LT3467A
2
3467afe
V
IN
Voltage ................................................................16V
SW Voltage ................................................ –0.4V to 42V
FB Voltage ................................................................2.5V
Current Into FB Pin .............................................. ±1mA
SHDN Voltage ......................................................... 16V
Maximum Junction Temperature ......................... 125°C
(Note 1)
ORDER INFORMATION
ABSOLUTE MAXIMUM RATINGS
TOP VIEW
9
DDB PACKAGE
8-LEAD (3mm s 2mm) PLASTIC DFN
5
6
7
8
4
3
2
1FB
GND
SW
SW
SHDN
SS
V
IN
GND
T
JMAX
= 125°C, θ
JA
= 80°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
6 V
IN
5 SS
4 SHDN
SW 1
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
GND 2
FB 3
T
JMAX
= 125°C, θ
JA
= 165°C/W, θ
JC
= 102°C/W
PIN CONFIGURATION
Operating Junction Temperature Range (Note 2)
E Grade ................................................ –40°C to 85°C
I Grade ............................................... –40°C to 125°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
TSOT ................................................................. 300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3467EDDB#PBF LT3467EDDB#TRPBF LCPX
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LT3467IDDB#PBF LT3467IDDB#TRPBF LCPX
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LT3467AEDDB#PBF LT3467AEDDB#TRPBF LCKD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LT3467AIDDB#PBF LT3467AIDDB#TRPBF LCKD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LT3467IS6#PBF LT3467IS6#TRPBF LTACH 6-Lead Plastic TSOT-23 –40°C to 125°C
LT3467ES6#PBF LT3467ES6#TRPBF LTACH 6-Lead Plastic TSOT-23 –40°C to 85°C
LT3467AES6#PBF LT3467AES6#TRPBF LTBCC 6-Lead Plastic TSOT-23 –40°C to 85°C
LT3467AIS6#PBF LT3467AIS6#TRPBF LTBCC 6-Lead Plastic TSOT-23 –40°C to 125°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3467EDDB LT3467EDDB#TR LCPX
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LT3467IDDB LT3467IDDB#TR LCPX
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LT3467AEDDB LT3467AEDDB#TR LCKD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LT3467AIDDB LT3467AIDDB#TR LCKD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
LT3467IS6 LT3467IS6#TR LTACH 6-Lead Plastic TSOT-23 –40°C to 125°C
LT3467ES6 LT3467ES6#TR LTACH 6-Lead Plastic TSOT-23 –40°C to 85°C
LT3467AES67 LT3467AES6#TR LTBCC 6-Lead Plastic TSOT-23 –40°C to 85°C
LT3467AIS67 LT3467AIS67#TR LTBCC 6-Lead Plastic TSOT-23 –40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
LT3467/LT3467A
3
3467afe
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3467E/LT3467AE are guaranteed to meet performance
specifi cations from 0°C to 85°C, junction temperature. Specifi cations over
the –40°C to 85°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT3467I/LT3467AI are guaranteed over the full –40°C to 125°C
operating junction temperature range.
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 3V, V
SHDN
= V
IN
unless otherwise noted. Specifi cations are for both
the LT3467 and LT3467A unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.2 2.4 V
Maximum Operating Voltage 16 V
Feedback Voltage
l
1.230
1.220
1.255 1.270
1.280
V
V
FB Pin Bias Current (Note 3)
l
10 50 nA
Quiescent Current V
SHDN
= 2.4V, Not Switching 1.2 2 mA
Quiescent Current in Shutdown V
SHDN
= 0.5V, V
IN
= 3V 0.01 1 μA
Reference Line Regulation 2.6V ≤ V
IN
≤ 16V 0.01 0.05 %/V
Switching Frequency LT3467
LT3467A
LT3467A
l
1
1.6
1.6
1.3
2.1
1.6
2.7
MHz
MHz
MHz
Maximum Duty Cycle LT3467
LT3467
LT3467A
LT3467A
l
l
88
87
82
78
94
88
%
%
%
%
Minimum Duty Cycle 10 %
Switch Current Limit At Minimum Duty Cycle
At Maximum Duty Cycle (Note 4)
1.4
0.8
1.8
1.2
2.5
1.9
A
A
Switch V
CESAT
I
SW
= 1.1A 330 500 mV
Switch Leakage Current V
SW
= 5V 0.01 1 μA
SHDN Input Voltage High 2.4 V
SHDN Input Voltage Low 0.5 V
SHDN Pin Bias Current V
SHDN
= 3V
V
SHDN
= 0V
16
0
32
0.1
μA
μA
SS Charging Current V
SS
= 0.5V 2 3 4.5 μA
Note 3: Current fl ows out of the pin.
Note 4: See Typical Performance Characteristics for guaranteed current
limit vs duty cycle.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

LT3467IDDB

Mfr. #:
Buy LT3467IDDB
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators LT3467 - 1.1A Step-Up DC/DC Converter with Integrated Soft-Start
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet