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LM2734 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
封装:
SOT-6
描述:
超薄 SOT23 1A 负载降压 DC-DC 稳压器
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原理图在P8P9P11P14P19P20P21P22P23P24P26P29
封装尺寸在P31P33P34
标记信息在P31P32
封装信息在P30P31P32P33P34
技术参数、封装参数在P4
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LM2734数据手册
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LM2734
V
IN
V
IN
EN
BOOST
SW
FB
GND
V
OUT
C3
L1
C1
C2
R1
R2
D1
D2
ON
OFF
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LM2734
SNVS288J –SEPTEMBER 2004–REVISED DECEMBER 2014
LM2734 Thin SOT 1-A Load Step-Down DC-DC Regulator
1 Features 3 Description
The LM2734 regulator is a monolithic, high-
1
• Thin SOT-6 Package
frequency, PWM step-down DC-DC converter in a 6-
• 3.0-V to 20-V Input Voltage Range
pin Thin SOT package. The device provides all the
• 0.8-V to 18-V Output Voltage Range
active functions to provide local DC-DC conversion
with fast transient response and accurate regulation
• 1-A Output Current
in the smallest possible PCB area.
• 550-kHz (LM2734Y) and 1.6-MHz (LM2734X)
Switching Frequencies
With a minimum of external components and online
design support through WEBENCH, the LM2734
• 300-mΩ NMOS Switch
regulator is easy to use. The ability to drive 1-A loads
• 30-nA Shutdown Current
with an internal 300-mΩ NMOS switch using state-of-
• 0.8-V, 2% Internal Voltage Reference
the-art 0.5-µm BiCMOS technology results in the best
power density available. The world-class control
• Internal Soft-Start
circuitry allows for on-times as low as 13 ns, thus
• Current-Mode, PWM Operation
supporting exceptionally high-frequency conversion
• WEBENCH
®
Online Design Tool
over the entire 3-V to 20-V input operating range
down to the minimum output voltage of 0.8 V.
• Thermal Shutdown
Switching frequency is internally set to 550 kHz
• LM2734XQ and LM2734YQ are AEC-Q100 Grade
(LM2734Y) or 1.6 MHz (LM2734X), allowing the use
1 Qualified and are Manufactured on an
of extremely small surface-mount inductors and chip
Automotive Grade Flow.
capacitors. Even though the operating frequencies
are very high, efficiencies up to 90% are easy to
2 Applications
achieve. External shutdown is included, featuring an
ultra-low standby current of 30 nA.
• Local Point-of-Load Regulation
• Core Power in HDDs
The LM2734 regulator uses current-mode control and
internal compensation to provide high-performance
• Set-Top Boxes
regulation over a wide range of operating conditions.
• Battery-Powered Devices
Additional features include internal soft-start circuitry
• USB Powered Devices
to reduce inrush current, pulse-by-pulse current limit,
thermal shutdown, and output overvoltage protection.
• DSL Modems
• Notebook Computers
Device Information
(1)
• Automotive
PART NUMBER PACKAGE BODY SIZE (NOM)
LM2734 SOT (6) 2.90 mm x 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
Efficiency vs Load Current
V
IN
= 5 V, V
OUT
= 3.3 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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