LMR23625-Q1_16 Datasheet, PDF (1/37 Pages) Texas Instruments – SIMPLE SWITCHER 36 V, 2.5 A Synchronous Step-Down Converter

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LMR23625-Q1
SNVSAR5 – DECEMBER 2016
LMR23625-Q1 SIMPLE SWITCHER^® 36 V, 2.5 A Synchronous Step-Down Converter
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 ESD Classification Level H1C
- Device CDM ESD Classification Level C4A
• 4 V to 36 V Input Range
• 2.5 A Continuous Output Current
• Integrated Synchronous Rectification
• Minimum Switch-On Time: 60 ns
• Internal Compensation for Ease of Use
• Fixed 2.1 MHz Switching Frequency
• PFM and Forced PWM Mode Options at Light
Load
• Frequency Synchronization to External Clock
• 75 µA Quiescent Current at No Load for PFM
Option
• Power Good Option
• Soft-Start into a Pre-Biased Load
• High Duty Cycle Operation Supported
• Output Short-Circuit Protection with Hiccup Mode
• 8-Pin HSOIC and 12-Pin WSON with
PowerPAD™ Package Options
2 Applications
• Automotive Battery Regulation
• Industrial Power Supplies
• Telecom and Datacom Systems
• General Purpose Wide Vin Regulation
space
Simplified Schematic
VIN up to 36 V
CIN
VIN
EN/SYNC
BOOT
AGND
SW
CVCC
VCC
FB
PGND
CBOOT _L
RFBT
RFBB
VOUT
COUT
3 Description
The LMR23625-Q1 SIMPLE SWITCHER^® is an easy
to use 36 V, 2.5 A synchronous step down regulator.
With a wide input range from 4 V to 36 V, it is
suitable for various applications from industrial to
automotive for power conditioning from unregulated
sources. Peak current mode control is employed to
achieve simple control loop compensation and cycle-
by-cycle current limiting. A quiescent current of 75 μA
makes it suitable for battery powered systems.
Internal loop compensation means that the user is
free from the tedious task of loop compensation
design. This also minimizes the external components.
The device has option for fixed frequency FPWM
mode to achieve small output voltage ripple at light
load. An extended family is available in 1 A
(LMR23610-Q1), 1.5 A (LMR23615-Q1) and 3 A
(LMR23630-Q1) load current options in pin-to-pin
compatible packages which allows simple, optimum
PCB layout. A precision enable input allows
simplification of regulator control and system power
sequencing. Protection features include cycle-by-
cycle current limit, hiccup mode short circuit
protection and thermal shutdown due to excessive
power dissipation.
Device Information⁽¹⁾
PART NUMBER
PACKAGE BODY SIZE (NOM)
LMR23625CQDDARQ1 HSOIC (8) 4.9 mm x 3.9 mm
LMR23625CFQDDARQ1 HSOIC (8) 4.9 mm x 3.9 mm
LMR23625CFPQDRRRQ1
(Preview)
WSON (12)
3 mm x 3 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Load, V_IN = 12 V, PFM Option
90
80
70
60
50
40
0.01
V_OUT = 5 V
V_OUT = 3.3 V
0.1
1
I_OUT (A)
10
D000
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.