參數(shù)資料
型號(hào)： LT3467IS5
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 2.5 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6
封裝： 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, 6 PIN
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 245K
代理商： LT3467IS5
1
LT3467/LT3467A
3467afc
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
TYPICAL APPLICATIO
U
1.1A Step-Up DC/DC
Converter with
Integrated Soft-Start
■ 1.3MHz Switching Frequency (LT3467)
■
2.1MHz Switching Frequency (LT3467A)
■ Low VCESAT Switch: 330mV at 1.1A
■ High Output Voltage: Up to 40V
■
Wide Input Range: 2.4V to 16V
■ Dedicated Soft-Start Pin
■ 5V at 540mA from 3.3V Input (LT3467)
■
5V at 430mA from 3.3V Input (LT3467A)
■ 12V at 270mA from 5V Input (LT3467)
■ 12V at 260mA from 5V Input (LT3467A)
■
Uses Small Surface Mount Components
■ Low Shutdown Current: < 1
μA
■ Pin-for-Pin Compatible with the LT1930 and LT1613
■
Low Profile (1mm) ThinSOT Package
■ Low Profile (0.75mm) 8-Lead (3mm x 2mm)
DFN Package
Single Li-Ion Cell to 5V Boost Converter
■ Digital Cameras
■
White LED Power Supplies
■ Cellular Phones
■ Medical Diagnostic Equipment
■
Local 5V or 12V Supplies
■ TFT-LCD Bias Supplies
■ xDSL Power Supplies
The LT
3467/LT3467A switching regulators combine a
42V, 1.1A switch with a soft-start function. Pin compatible
with the LT1930, its low VCESAT 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 re-
sults in low, predictable output noise that is easy to filter.
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 flyback 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 profile (1mm) 6-lead
SOT-23 package and tiny 3mm x 2mm DFN package.
GND
VIN
SW
SS
FB
VIN
2.6V TO
4.2V
2.7
μH
402k
LT3467
3467 TA01a
15
μF
3.3pF
4.7
μF
133k
VOUT
5V
765mA AT VIN = 4.2V,
540mA AT VIN = 3.3V,
360mA AT VIN = 2.6V
SHDN
OFF ON
0.047
μF
Efficiency
IOUT (mA)
EFFICIENCY
(%)
600
95
90
85
80
75
70
65
60
55
50
3467 TA01b
100
900
200 300 400 500
700 800
VIN = 3.3V
VIN = 4.2V
VIN = 2.6V
, LT, LTC and LTM 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.
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