LTC3426ES6-TRPBF 데이터 시트보기 (PDF) - Analog Devices
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LTC3426ES6-TRPBF Datasheet PDF : 12 Pages
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FEATURES
n Internal 2A MOSFET Switch
n 1.2MHz Switching Frequency
n Integrated Soft-Start
n Low 1.6V VIN Operation
n Low RDS(ON) Switch: 100mΩ at 5V Output
n Delivers 5V at 800mA from a 3.3V Input
n Delivers 3.3V at 800mA from a 2.5V Input
n Uses Small, Low Profile External Components
n Low Profile (1mm) SOT-23 (ThinSOT™) Package
APPLICATIONS
n White LED Driver Supply
n Local 3.3V or 5V Supply
n Battery Back-Up
TYPICAL APPLICATION
3.3V to 5V Boost Converter
2.2µH
VIN
3.3V
10µF
SW
VIN
VOUT
LTC3426
OFF ON
SHDN FB
GND
VOUT
5V
800mA
22µF
3426 TA01
LTC3426
1.2MHz Step-Up DC/DC
Converter in SOT-23
DESCRIPTION
The LTC®3426 step-up switching regulator generates an
output voltage of up to 5.5V from an input voltage as low
as 1.6V. Ideal for applications where space is limited, it
switches at 1.2MHz, allowing the use of tiny, low cost
and low profile external components. Its internal 2A,
100mΩ NMOS switch provides high efficiency even at
heavy load, while the constant frequency, current mode
architecture results in low, predictable output noise that
is easy to filter.
Antiringing circuitry reduces EMI concerns by damping
the inductor while in discontinuous mode, and internal
soft-start eases inrush current worries. Internal frequency
compensation is designed to accommodate ceramic output
capacitors, further reducing noise. The device features
very low shutdown current of 0.5µA.
The LTC3426 is available in the 6-lead SOT-23 package.
L, LT, LTC and LTM are registered trademarks and ThinSOT is a trademark of Analog Devices,
Inc. All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 6498466, 6611131.
Efficiency
100
VIN = 3.3V
95 VOUT = 5V
90
85
80
75
70
65
60
55
50
1
10
100
LOAD CURRENT (mA)
1000
3426 TA01b
For more information www.linear.com/LTC3426
3426fb
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