LMR14030 Datasheet, PDF (1/30 Pages) Texas Instruments – LMR14030 SIMPLE SWITCHER® 40 V 3.5 A, 2.2 MHz Step-Down Converter with 40 μA IQ

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
LMR14030
SNVSA81A – FEBRUARY 2015 – REVISED APRIL 2015
LMR14030 SIMPLE SWITCHER^® 40 V 3.5 A, 2.2 MHz Step-Down Converter with 40 µA I_Q
1 Features
•1 4 V to 40 V Input Range
• 3.5 A Continuous Output Current
• Ultra-low 40 µA Operating Quiescent Current
• 90 mΩ High-Side MOSFET
• Minimum Switch-On Time: 75 ns
• Current Mode Control
• Adjustable Switching Frequency from 200 kHz to
2.5 MHz
• Frequency Synchronization to External Clock
• Internal Compensation for Ease of Use
• High Duty Cycle Operation Supported
• Precision Enable Input
• 1 µA Shutdown Current
• External Soft-start
• Thermal, Overvoltage and Short Protection
• 8-Pin HSOIC with PowerPAD™ Package
3 Description
The LMR14030 is a 40 V, 3.5 A step down regulator
with an integrated high-side MOSFET. With a wide
input range from 4 V to 40 V, it’s suitable for various
applications from industrial to automotive for power
conditioning from unregulated sources. The
regulator’s quiescent current is 40 µA in Sleep-mode,
which is suitable for battery powered systems. An
ultra-low 1 μA current in shutdown mode can further
prolong battery life. A wide adjustable switching
frequency range allows either efficiency or external
component size to be optimized. Internal loop
compensation means that the user is free from the
tedious task of loop compensation design. This also
minimizes the external components of the device. A
precision enable input allows simplification of
regulator control and system power sequencing. The
device also has built-in protection features such as
cycle-by-cycle current limit, thermal sensing and
shutdown due to excessive power dissipation, and
output overvoltage protection.
2 Applications
• Automotive Battery Regulation
• Industrial Power Supplies
• Telecom and Datacom Systems
• Battery Powered System
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMR14030SDDA
HSOIC-8
4.89 mm x 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
VIN up to 40 V
CIN
RT
VIN
EN
BOOT
RT/SYNC
SW
CBOOT
L
D
RFBT
SS
FB
CSS
GND
RFBB
VOUT
COUT
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
10 _{VIN = 12 V, CSW = 500 kHz}
0
0.001
0.01
0.1
I_OUT (A)
V_OUT = 5 V
V_OUT = 3.3 V
1
10
D001
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.