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LM5175RHFT データシート(PDF) 1 Page - Texas Instruments

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部品番号 LM5175RHFT
部品情報  42 V Wide VIN Synchronous 4-Switch Buck-Boost Controller
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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

LM5175RHFT データシート(HTML) 1 Page - Texas Instruments

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RT/SYNC
VIN
BOOT1
EN/UVLO
VOUT
AGND
CSG
SS
CS
PGND
VOSNS
HDRV1
SW1
COMP
LM5175
LDRV1
LDRV2
HDRV2
BOOT2
SW2
Enable
VCC
VCC
VCC
SLOPE
PGOOD
Power Good
Copyright © 2016, Texas Instruments Incorporated
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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.
LM5175
SNVSA37A – OCTOBER 2015 – REVISED MAY 2016
LM5175 42 V Wide VIN Synchronous 4-Switch Buck-Boost Controller
1
1 Features
1
Single Inductor Buck-Boost Controller for Step-
Up/Step-Down DC/DC Conversion
Wide VIN Range: 3.5 V to 42 V, 60 V Maximum
Flexible VOUT Range: 0.8 V to 55 V
VOUT Short Protection
High Efficiency Buck-Boost Transition
Adjustable Switching Frequency
Optional Frequency Sync and Dithering
Integrated 2-A MOSFET Gate Drivers
Cycle-by-Cycle Current Limit and Optional Hiccup
Optional Input or Output Average Current Limiting
Programmable Input UVLO and Soft-Start
Power Good and Output Overvoltage Protection
Selectable CCM or DCM with Pulse Skipping
Available in HTSSOP-28 and QFN-28 Packages
2 Applications
Automotive Start-Stop Systems
Backup Battery and Supercapacitor Charging
Industrial PC Power Supplies
USB Power Delivery
LED Lighting
3 Description
The LM5175 is a synchronous four-switch buck-boost
DC/DC controller capable of regulating the output
voltage at, above, or below the input voltage. The
LM5175 operates over a wide input voltage range of
3.5 V to 42 V (60 V maximum) to support a variety of
applications.
The LM5175 employs current-mode control both in
buck and boost modes of operation for superior load
and line regulation. The switching frequency is
programmed by an external resistor and can be
synchronized to an external clock signal.
The device also features a programmable soft-start
function and offers protection features including
cycle-by-cycle current limiting, input undervoltage
lockout (UVLO), output overvoltage protection (OVP),
and thermal shutdown. In addition, the LM5175
features selectable Continuous Conduction Mode
(CCM) or Discontinuous Conduction Mode (DCM)
operation, optional average input or output current
limiting, optional spread spectrum to reduce peak
EMI,
and
optional
hiccup
mode
protection
in
sustained overload conditions.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
LM5175PWP
HTSSOP-28
9.7 mm x 4.4 mm
LM5175RHF
QFN-28
4.0 mm x 5.0 mm
4 Simplified Schematic


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