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LM2731XMF_NOPB データシート(PDF) 1 Page - Texas Instruments

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部品番号 LM2731XMF_NOPB
部品情報  LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM2731XMF_NOPB データシート(HTML) 1 Page - Texas Instruments

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Efficiency vs Load Current
LOAD CURRENT (mA)
3.3 -5V Boost
^z_ s Υ]}v
0
200
400
600
800
70
80
90
100
LM2731
³<´
SW
FB
GND
VIN
SHDN
U1
R3
51K
SHDN
GND
3.3 VIN
C1
2.2PF
R2
13.3K
CF
470pF
D1
MBR0520
R1/40.5K
L1/6.8PH
C2
22PF
5V
OUT
700mA
(TYP)
Efficiency vs Load Current
LOAD CURRENT (mA)
0 100
200
300 400
70
80
90
100
LM2731
³;´
SW
FB
GND
VIN
SHDN
U1
R3
51K
SHDN
GND
5 VIN
C1
2.2PF
R2
13.3K
CF
220pF
D1
MBR0520
R1/117K
L1/10PH
C2
4.7PF
12V
OUT
500mA
(TYP)
500
5 - 12V Boost
^y_ s Υ]}v
TI Confidential - NDA Restrictions
LM2731
www.ti.com
SNVS217F – MAY 2004 – REVISED NOVEMBER 2012
LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
Check for Samples: LM2731
1
FEATURES
DESCRIPTION
The LM2731 switching regulators are current-mode
2
22V DMOS FET Switch
boost converters operating at fixed frequencies of 1.6
1.6 MHz (“X”), 0.6 MHz (“Y”) Switching
MHz (“X” option) and 600 kHz (“Y” option).
Frequency
The use of SOT-23 package, made possible by the
Low RDS(ON) DMOS FET
minimal power loss of the internal 1.8A switch, and
Switch Current up to 1.8A
use of small inductors and capacitors result in the
industry's highest power density. The 22V internal
Wide Input Voltage Range (2.7V–14V)
switch makes these solutions perfect for boosting to
Low Shutdown Current (<1 µA)
voltages up to 20V.
5-Lead SOT-23 Package
These parts have a logic-level shutdown pin that can
Uses Tiny Capacitors and Inductors
be used to reduce quiescent current and extend
Cycle-by-Cycle Current Limiting
battery life.
Internally Compensated
Protection is provided through cycle-by-cycle current
limiting and thermal shutdown. Internal compensation
APPLICATIONS
simplifies design and reduces component count.
White LED Current Source
Table 1. Switch Frequency
PDA’s and Palm-Top Computers
X
Y
Digital Cameras
1.6 MHz
0.6 MHz
Portable Phones and Games
Local Boost Regulator
Typical Application Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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