参数资料
型号: LT3684IMSE
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10
封装: PLASTIC, MSOP-10
文件页数: 1/24页
文件大小: 326K
代理商: LT3684IMSE
LT3684
1
3684f
36V, 2A, 2.8MHz Step-Down
Switching Regulator
The LT
3684isanadjustablefrequency(300kHzto2.8MHz)
monolithic buck switching regulator that accepts input
voltages up to 34V (36V maximum). A high efciency
0.18
Ω switch is included on the die along with a boost
Schottky diode and the necessary oscillator, control and
logic circuitry. Current mode topology is used for fast
transient response and good loop stability. The LT3684’s
high operating frequency allows the use of small, low cost
inductors and ceramic capacitors resulting in low output
ripple while keeping total solution size to a minimum.
The low current shutdown mode reduces input supply
current to less than 1A while a resistor and capacitor on
the RUN/SS pin provide a controlled output voltage ramp
(soft-start). A power good ag signals when VOUT reaches
90% of the programmed output voltage. The LT3684 is
available in 10-Pin MSOP and 3mm
× 3mm DFN packages
with Exposed Pads for low thermal resistance.
Automotive Battery Regulation
Power for Portable Products
Distributed Supply Regulation
Industrial Supplies
Wall Transformer Regulation
Wide Input Range: 3.6V to 34V Operating,
36V Maximum
2A Maximum Output Current
Adjustable Switching Frequency: 300kHz to 2.8MHz
Low Shutdown Current: IQ < 1A
Integrated Boost Diode
Power Good Flag
Saturating Switch Design: 0.18
Ω On-Resistance
1.265V Feedback Reference Voltage
Output Voltage: 1.265V to 20V
Soft-Start Capability
Small 10-Pin Thermally Enhanced MSOP and
(3mm
× 3mm) DFN Packages
3.3V Step-Down Converter
Efciency
FEATURES
DESCRIPTION
APPLICATIONS
TYPICAL APPLICATION
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
SW
BIAS
FB
VC
PG
RT
VIN
BD
VIN
4.5V TO
34V
VOUT
3.3V
2A
4.7
F
0.47
F
330pF
22
F
200k
16.2k
60.4k
4.7
H
324k
GND
OFF ON
LT3684
3684 TA01
RUN/SS
BOOST
LOAD CURRENT (A)
0
30
EFFICIENCY
(%)
40
50
60
70
80
90
0.5
1
1.5
2
3684 TA01b
VIN = 12V
VOUT = 3.3V
L = 4.7
H
f = 800kHz
相关PDF资料
PDF描述
LT3684EDD#TR 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10
LT3694-1EUFD#PBF 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PQCC28
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LT3694IFE#PBF 2.6 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO20
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