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LM25122QPWPRQ1 Arkusz danych(PDF) 1 Page - Texas Instruments

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Numer części LM25122QPWPRQ1
Szczegółowy opis  Wide-Input Synchronous Boost Controller
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

LM25122QPWPRQ1 Arkusz danych(HTML) 1 Page - Texas Instruments

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VCC
LM25122
CSP
SYNCIN/RT
RES
SS
UVLO
VIN
SYNCOUT
AGND
BST
MODE
PGND
SLOPE
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HO
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LM25122-Q1
SNVSAF0A – DECEMBER 2015 – REVISED DECEMBER 2015
LM25122-Q1 Wide-Input Synchronous Boost Controller With Multiple Phase Capability
1 Features
2 Applications
1
AEC-Q100 Grade 1 (TA = –40°C to 125°C)
12-V, 24-V, and 48-V Power Systems
Maximum Input Voltage : 42 V
Automotive Start-Stop
Min Input Voltage : 3 V (4.5 V for startup)
Audio Power Supply
Output Voltage up to 50 V
High Current Boost Power Supply
Bypass (VOUT = VIN) Operation
3 Description
1.2 V Reference with ±1.0% Accuracy
The LM25122 is a multiphase capable synchronous
Free-Run and Synchronizable Switching to 600
boost
controller
intended
for
high-efficiency
kHz
synchronous boost regulator applications. The control
Peak Current Mode Control
method is based upon peak current mode control.
Current mode control provides inherent line feed-
Robust 3 A Integrated Gate Drivers
forward, cycle-by-cycle current limiting and ease of
Adaptive Dead-Time Control
loop compensation.
Optional Diode Emulation Mode
The switching frequency is programmable up to 600
Programmable Cycle-by-Cycle Current Limit
kHz. Higher efficiency is achieved by two robust N-
Hiccup Mode Overload Protection
channel MOSFET gate drivers with adaptive dead-
time control. A user-selectable diode emulation mode
Programmable Line UVLO
also
enables
discontinuous
mode
operation
for
Programmable Soft-Start
improved efficiency at light load conditions.
Thermal Shutdown Protection
An internal charge pump allows 100% duty cycle for
Low Shutdown Quiescent Current: 9
μA
high-side synchronous switch (Bypass operation). A
Programmable Slope Compensation
180º phase shifted clock output enables easy multi-
phase interleaved configuration. Additional features
Programmable Skip Cycle Mode Reduces
include thermal shutdown, frequency synchronization,
Standby Power
hiccup
mode
current
limit
and
adjustable
line
Allows External VCC Supply
undervoltage lockout.
Inductor DCR Current Sensing Capability
Multiphase Capability
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
Thermally Enhanced 20-Pin HTSSOP
LM25122-Q1
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Application Diagram
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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