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LMR23630QDRRRQ1 Datasheet(PDF) 11 Page - Texas Instruments

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Part # LMR23630QDRRRQ1
Description  SIMPLE SWITCHER 36 V, 3 A Synchronous Step-Down Converter
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LMR23630QDRRRQ1 Datasheet(HTML) 11 Page - Texas Instruments

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EA
REF
EN/SYNC
SW
CBOOT
VCC
Internal
SS
OV/UV
Detector
Oscillator
Precision
Enable
LDO
PFM
Detector
Slope
Comp
PWM CONTROL LOGIC
UVLO
TSD
Freq
Foldback
Zero
Cross
HICCUP
Detector
VIN
Rc
Cc
PGND
FB
LS I Sense
HS I Sense
FB
VCC
Enable
SYNC
Detector
SYNC Signal
SYNC Signal
AGND
(PGOOD)
Copyright © 2016, Texas Instruments Incorporated
(RT)
11
LMR23630-Q1
www.ti.com
SNVSAR6 – DECEMBER 2016
Product Folder Links: LMR23630-Q1
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Copyright © 2016, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
The LMR23630-Q1 SIMPLE SWITCHER® regulator is an easy to use synchronous step-down DC-DC converter
operating from 4 V to 36 V supply voltage. It is capable of delivering up to 3 A DC load current with good thermal
performance in a small solution size. For both SOIC and WSON package, an extended family is available in
multiple current options from 1 A to 3 A in pin-to-pin compatible packages.
The LMR23630-Q1 employs constant frequency peak current mode control. The device enters PFM mode at
light load to achieve high efficiency. A user selectable FPWM option is provided to achieve low output voltage
ripple, tight output voltage regulation, and constant switching frequency. The device is internally compensated,
which reduces design time, and requires few external components. The switching frequency is fixed 400 kHz. For
the option which has RT pin, the switching frequency is adjustable from 200 kHz to 2.2 MHz. Also the
LMR23630-Q1 is capable of synchronization to an external clock within the range of 200 kHz to 2.2 MHz.
Additional features such as precision enable, power good flag and internal soft-start provide a flexible and easy
to use solution for a wide range of applications. Protection features include thermal shutdown, VIN and VCC
under-voltage lockout, cycle-by-cycle current limit, and hiccup mode short-circuit protection.
The family requires very few external components and has a pin-out designed for simple, optimum PCB layout.
8.2 Functional Block Diagram


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