Datasheet 搜索 > DC/DC转换器 > TI（德州仪器） > LM2840XMK-ADJL/NOPB 数据手册 > LM2840XMK-ADJL/NOPB 其他数据使用手册 1/20 页
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LM2840XMK-ADJL/NOPB 其他数据使用手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
DC/DC转换器
封装:
TSOT-23-6
描述:
TEXAS INSTRUMENTS LM2840XMK-ADJL/NOPB 直流-直流开关降压(逐步递减)稳压器, 可调, 4.5V-42V输入, 765mV-34V输出, 100mA输出, TSOT-23-6
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2Hot
典型应用电路图在P1
原理图在P7
封装尺寸在P12P13P15P16P17
标记信息在P12P13
封装信息在P12P13P14P15P16P17
技术参数、封装参数在P3P4
应用领域在P1P20
电气规格在P3P4P5P6
导航目录
LM2840XMK-ADJL/NOPB数据手册
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FB
GND
SW
CB
SHDN
LM2840/1/2-ADJL
VOUT
VIN
L1
D1
R1
R2
V
IN
C
BOOT
C
IN
C
OUT
LM2841, LM2842
www.ti.com
SNVS540H –MARCH 2009–REVISED APRIL 2013
LM2840/LM2841/LM2842/ LM2840-Q1/LM2841-Q1/LM2842-Q1 100/300/600 mA 42V Input
Step-Down DC/DC Regulator in Thin SOT
Check for Samples: LM2841, LM2842
1
FEATURES
DESCRIPTION
The LM2840, LM2841 and LM2842 are PWM DC/DC
2
• LM2840Q, LM2841-Q1 and LM2842-Q1 are
buck (step-down) regulators. With a wide input range
Automotive Grade Products that are AEC-Q100
from 4.5V-42V, they are suitable for a wide range of
Grade 1 Qualified (-40°C to +125°C Operating
applications such as power conditioning from
Junction Temperature)
unregulated sources. They feature a low R
DSON
(0.9Ω
• Input Voltage Range of 4.5V to 42V
typical) internal switch for maximum efficiency (85%
typical). Operating frequency is fixed at 550 kHz (X
• Output Current Options of 100 mA, 300 mA
version) and 1.25 MHz (Y version) allowing the use of
and 600 mA
small external components while still being able to
• Feedback Pin Voltage of 0.765V
have low output voltage ripple. Soft-start can be
• 550 kHz (X) or 1.25 MHz (Y) Switching
implemented using the shutdown pin with an external
Frequency
RC circuit allowing the user to tailor the soft-start time
to a specific application.
• Low Shutdown I
Q
, 16 µA Typical
The LM2840 is optimized for up to 100 mA, the
• Short Circuit Protected
LM2841 for 300 mA and the LM2842 is optimized for
• Internally Compensated
up to 600 mA load currents. They all have a 0.765V
• Soft-Start Circuitry
nominal feedback voltage.
• Small Overall Solution Size (SOT-6L Package)
Additional features include: thermal shutdown, V
IN
under-voltage lockout, and gate drive under-voltage
APPLICATIONS
lockout. The LM2840, LM2841 and LM2842 are
available in a low profile SOT-6L package.
• Battery Powered Equipment
• Industrial Distributed Power Applications
• Portable Media Players
• Portable Hand Held Instruments
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.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2009–2013, 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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