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LM25141-Q1 bảng dữ liệu(HTML) 1 Page - Texas Instruments

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VOUT
RES
AGND
SS
COMP
PGND
VOUT
CS
LO
SW
HO
HB
VIN
LM5141-Q1
VIN
VCC
HOL
LOL
EN
OSC
DEMB
VCCX
VDDA
PG
FB
RT
DITH
CBST
DBST
COUT
LOUT
RSENSE
CIN
CRES
CSS
CDITH
RT
CVDDA
CVCC
RCOMP CCOMP
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.
LM25141
SNVSAU1 – MARCH 2017
LM25141 Wide Input Range Synchronous Buck Controller
1
1 Features
1
–40ºC to +125ºC Ambient Operating Temperature
Range
An AEC-Q100 Qualified Device is Available
VIN 3.8 V to 45 V (47 V Absolute Maximum)
Output: Fixed 3.3 V, 5 V, or Adjustable From
1.5 V - 15 V with ±0.8% Accuracy
Fixed 2.2 MHz or 440 kHz Switching Frequency
with ±5% Accuracy
High-Side and Low-Side Gate Drive With Slew
Rate Control
Optional Frequency Shift by Varying an Analog
Voltage or RT Resistor
Optional Synchronization to an External Clock
Optional Spread Spectrum
Shutdown Mode IQ: 10 µA Typical
Low Standby Mode IQ: 35 µA Typical
75 mV Current Limit Threshold with ±0.9%
Accuracy
External Resistor or DCR Current Sensing
Output Enable Logic Input
Hiccup Mode for Sustained Overload
Power Good Indication Output
Selectable Diode Emulation or Forced Pulse
Width Modulation
QFN-24 Package with Wettable Flanks
Create a Custom Design Using the LM25141 With
the WEBENCH® Power Designer
2 Applications
Medical Equipment
Industrial Programmable Logic Controller
Industrial PC
Embedded PC
3 Description
The LM25141 is a synchronous buck controller,
intended
for
high
voltage
wide
VIN step-down
converter applications. The control method is peak
current mode control. Current mode control provides
inherent line feed-forward, cycle-by-cycle current
limiting,
and
ease
of
loop
compensation.
The
LM25141 features slew rate control to simplify the
compliance with EMI requirements.
The
LM25141
has
two
selectable
switching
frequencies: 2.2 MHz and 440 kHz. Gate Drivers with
Slew Rate Control that can be adjusted to reduce
EMI.
In light or no-load conditions, the LM25141 operates
in skip cycle mode for improved low power efficiency.
The LM25141 has a high voltage bias regulator with
automatic switch-over to an external bias to reduce
the IQ current from VIN. Additional features include
frequency
synchronization,
cycle-by-cycle
current
limit, hiccup mode fault protection for sustained
overload, and power good output.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM25141
QFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic


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