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RNL0022A Datasheet(PDF) 1 Page - Texas Instruments

Part # RNL0022A
Description  5.5-A, 36-V Synchronous, 400-kHz DC-DC Step-Down Converter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

RNL0022A Datasheet(HTML) 1 Page - Texas Instruments

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Output Current (A)
0.001
0.01
0.1
1
10
80%
82%
84%
86%
88%
90%
92%
94%
96%
98%
100%
LMS3
VIN = 12
VIN = 24
PVIN 1
PGND1
CBIAS
VCC
CBOOT
SW
EN
AVIN
FPWM
RESET
VOUT
LMS3655
AGND
10 µF
470 nF
PVIN 2
PGND2
SYNC
FB
NC
VIN
3.5 V to 36 V
10 µF
4.7 µF
10 µF
0.1 µF
CFF
RFBT
RFBB
L1=10 µH
3 X 47 µF
Copyright © 2017, 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.
LMS3655
SNAS744 – JULY 2017
LMS3655 5.5-A, 36-V Synchronous, 400-kHz DC-DC Step-Down Converter
1
1 Features
1
96% Peak Efficiency While Converting 12 V to 5 V
Low EMI and Switch Noise
Minimized Switch Node Ringing
Pseudo-Random Spread Spectrum
400-kHz (±10%) Fixed Switching Frequency
–40°C to +150°C Junction Temperature Range
External Frequency Synchronization
RESET Output With Internal Filter and 3-ms
Release Timer
Automatic Light Load Mode for Improved
Efficiency
Pin-Selectable Forced PWM Mode
Built-In Compensation, Soft Start, Current Limit,
Thermal Shutdown, and UVLO
0.35-V Dropout With 3.5-A Load at 25°C (Typical)
32-µA IQ_VIN: Quiescent Current at 3.3 VOUT and
No Load (Typical)
5.5-A Continuous Load Current
Adjustable Output Voltage (1 V to 15 V)
±1.5% Reference Voltage Tolerance
4-mm × 5-mm, 0.5-mm Pitch SON Package
2 Applications
Noise-Sensitive Medical Applications
Telecom
High Performance Industrial
3 Description
The LMS3655 synchronous buck regulators are
optimized
for
high
performance
applications,
providing an adjustable output of 1 V to 15 V.
Seamless transition between PWM and PFM modes,
along with a low quiescent current, ensures high
efficiency and superior transient responses at all
loads.
Advanced high speed circuitry allows the LMS3655 to
regulate an input of 24V to an output of 3.3V at a
fixed frequency of 400kHz while also enabling a
continuous load current of 5.5 A. An innovative
frequency foldback architecture allows this device to
regulate a 3.3-V output from an input voltage of only
3.5 V. The input voltage can range up to 36 V, with
transient tolerance up to 42 V, easing input surge
protection design.
An open-drain reset output, with built-in filtering and
delay, provides a true indication of system status.
This feature negates the requirement for an additional
supervisory
component,
saving
cost
and
board
space.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
LMS3655
VQFN-HR (22)
4.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
LMS3655 Efficiency: VOUT = 5 V


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