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LMR23625CEVM 其他数据使用手册 - TI（德州仪器）
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LMR23625CEVM数据手册
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I
OUT
(A)
Efficiency (%)
0.0001 0.001 0.01 0.1 1 10
50
60
70
80
90
100
D000
V
OUT
= 5 V
V
OUT
= 3.3 V
BOOT
SW
L
C
BOOT
FB
VIN
V
IN
up to 36 V
PGND
C
OUT
EN/SYNC
C
IN
VCC
AGND
V
OUT
C
VCC
R
FBT
R
FBB
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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.
LMR23625
SNVSAH3B –DECEMBER 2015–REVISED APRIL 2017
LMR23625 SIMPLE SWITCHER
®
36 V, 2.5 A Synchronous Step-Down Converter
1
1 Features
1
• 4.5 V to 36 V Input Range
• 2.5 A Continuous Output Current
• Integrated Synchronous Rectification
• Current Mode Control
• Minimum Switch-On Time: 60 ns
• 2.1 MHz Switching Frequency With PFM and
Forced PWM Mode Options
• Frequency Synchronization to External Clock
• Internal Compensation for Ease of Use
• 75 µA Quiescent Current at No Load
• Soft-Start into a Pre-Biased Load
• High Duty Cycle Operation Supported
• Precision Enable Input
• Output Short-Circuit Protection with Hiccup Mode
• Thermal Protection
• 8-Pin HSOIC with PowerPAD™ Package
• Create a Custom Design Using the LMR23625
With the WEBENCH
®
Power Designer
2 Applications
• Automotive Battery Regulation
• Industrial Power Supplies
• Telecom and Datacom Systems
• General Purpose Wide Vin Regulation
3 Description
The LMR23625 SIMPLE SWITCHER
®
is an easy to
use 36 V, 2.5 A synchronous step down regulator.
With a wide input range from 4.5 V to 36 V, it is
suitable for various applications from industrial to
automotive for power conditioning from unregulated
sources. Peak current mode control is employed to
achieve simple control loop compensation and cycle-
by-cycle current limiting. A quiescent current of 75 μA
makes it suitable for battery powered systems. An
ultra-low 2 μA shutdown current can further prolong
battery life. Internal loop compensation means that
the user is free from the tedious task of loop
compensation design. This also minimizes the
external components. The device has option for fixed
frequency FPWM mode to achieve small output
voltage ripple at light load. An extended family is
available in 1 A (LMR23610) and 3 A (LMR23630)
load current options in pin-to-pin compatible
packages which allows simple, optimum PCB layout.
A precision enable input allows simplification of
regulator control and system power sequencing.
Protection features include cycle-by-cycle current
limit, hiccup mode short circuit protection and thermal
shutdown due to excessive power dissipation.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
LMR23625C HSOIC (8) 4.89 mm x 3.90 mm
LMR23625CF
(FPWM Option)
HSOIC (8) 4.89 mm x 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
Efficiency vs Load
V
IN
= 12 V, PFM Option
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