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LM53625NQRNLTQ1 Datasheet(PDF) 1 Page - Texas Instruments

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Part # LM53625NQRNLTQ1
Description  Automotive Step Down DC-DC Converter
Download  7 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM53625NQRNLTQ1 Datasheet(HTML) 1 Page - Texas Instruments

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L1=2.2µH
PVIN 1
PGND1
CBIAS
VCC
CBOOT
SW
EN
AVIN
FPWM
RESET
VOUT
LM53625/35
AGND
3 X 22µF
10µF
470nF
PVIN 2
PGND2
SYNC
FB
NC
VSUPPLY
10µF
2.2µF
10µF
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
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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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.
LM53625-Q1, LM53635-Q1
SNVSAA7 – DECEMBER 2015
LM53625/35-Q1, 2.5/3.5A, 36 V Wide-VINSynchronous, 2.1MHz, Automotive Step Down DC-
DC Converter
1
1 Features
1
Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
Device HBM Classification Level 2
Device CDM Classification Level C5
4 mm x 5 mm, 0.5 mm Pitch SON Package with
Wettable Flanks and 0.6 mm VIN Spacing
-40°C to 150°C Junction Temperature Range
Current Mode Control with Internal Compensation
2.1MHz (±10%) Fixed Switching Frequency
Low EMI
Spread Spectrum as a Factory Option
Min OFF Time-80ns (maximum)
Min ON Time-60ns (maximum)
External Frequency Synchronization
RESET Output with Filter and 3ms 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
3.5 V to 36 V Input Voltage with Transients up to
42 V
LM53625-Q1 = 2.5 A Maximum Load Current
LM53635-Q1 = 3.5 A Maximum Load Current
91% Efficiency while Converting 13.5 V to 5 V, 3.5
A
0.6 V Dropout at 3.5 A Load, 1.4 V @ 1.85MHz @
105ºC TA
Output Voltage Options: 5 V, 3.3 V and Adjustable
±1.5% Output Voltage Tolerance (over
temperature)
2-µA Shutdown Current (typical)
15-µA Iq - Quiescent Current at no Load (Typical)
with 3.3 V Typical
2 Applications
Automotive Telematics
Navigation Systems
In-Dash Instrumentation
Battery-Powered Applications
3 Description
The LM53625-Q1/LM53635-Q1 synchronous buck
regulator is optimized for automotive applications,
providing an output voltage of 5 V, 3.3 V, or an
adjustable output. Advanced high speed circuitry
allows the LM53625-Q1/LM53635-Q1 to regulate
from an input of 13.5 V to an output 3.3 V at a fixed
frequency of 2.1MHz. Innovative architecture allows
the device to regulate a 3.3 V output from an input
voltage of only 3.5 V. All aspects of the LM53625-
Q1/LM53635-Q1 are optimized for automotive and
performance driven industrial customers. An input
voltage range up to 36 V, with transient tolerance up
to 42 V, eases input surge protection design. An open
drain reset output, with 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. Seamless
transition between PWM and PFM modes, along with
a quiescent current of only 15-µA for 3.3 V option,
ensures
high
efficiency
and
superior
transient
response at all loads.
Device Information(1)
DEVICE NAME
PACKAGE
BODY SIZE
LM53625-Q1
SON (22)
4 mm x 5 mm
LM53635-Q1
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
Automotive Wide-VIN Buck Convertor, 3.5-
V to 36 V input, available in 3.3 V, 5.0 V
and Adjustable output.


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