參數(shù)資料
型號(hào)： LTC3872ITS8#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 1 MM HEIGHT, LEAD FREE, PLASTIC, MO-193, TSOT-23, 8 PIN
文件頁(yè)數(shù)： 1/22頁(yè)
文件大小： 245K
代理商： LTC3872ITS8#PBF
LTC3872
1
3872fb
No RSENSE
Current Mode Boost
DC/DC Controller
High Efficiency 3.3V Input, 5V Output Boost Converter
ITH
IPRG
GND
VFB
VIN
SW
NGATE
LTC3872
3872 TA01
RUN/SS
17.4k
VIN
11k
1%
34.8k
1%
1nF
M1
D1
10F
100F
×2
1.8nF
47pF
1H
VIN
3.3V
VOUT
5V
2A
Efficiency and Power Loss vs Load Current
LOAD CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(W)
90
100
10
0.001
20
10
80
50
70
60
40
1
100
1000
10000
3872 TA01b
0
10
1
0.1
0.01
Typical applicaTion
FeaTures
DescripTion
applicaTions
The LTC3872 is a constant frequency current mode
boost DC/DC controller that drives an N-channel power
MOSFET and requires very few external components. The
No RSENSETM architecture eliminates the need for a sense
resistor, improves efficiency and saves board space.
The LTC3872 provides excellent AC and DC load and line
regulation with ±1.5% output voltage accuracy. It incor-
porates an undervoltage lockout feature that shuts down
the device when the input voltage falls below 2.3V.
High switching frequency of 550kHz allows the use of a
small inductor. The LTC3872 is available in an 8-lead low
profile (1mm) ThinSOTTM package and 8-pin 2mm
× 3mm
DFN package.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No RSENSE and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
n
Telecom Power Supplies
n
42V Automotive Systems
n
24V Industrial Controls
n
IP Phone Power Supplies
n
No Current Sense Resistor Required
n
VOUT up to 60V
n
Constant Frequency 550kHz Operation
n
Internal Soft-Start and Optional External Soft-Start
n
Adjustable Current Limit
n
Pulse Skipping at Light Load
n
VIN Range: 2.75V to 9.8V
n
±1.5% Voltage Reference Accuracy
n
Current Mode Operation for Excellent Line and Load
Transient Response
n
Low Profile (1mm) SOT-23 and 2mm
× 3mm DFN
Packages
相關(guān)PDF資料
PDF描述
LTC3872ITS8#TRPBF SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO8
LTC3872HTS8#TRPBF SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO8
LTC3872HTS8#PBF SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO8
LTC3872IDDB#PBF SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO8
LTC3873ETS8 SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PDSO8
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參數(shù)描述
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