LMR43620-Q1, LMR43610-Q1
LMR43620-Q1, LMR43610-Q1
www.ti.com
SNVSBX5A – OCTOBER 2020 – REVISED DECEMBER 2020
SNVSBX5A – OCTOBER 2020 – REVISED DECEMBER 2020
LMR436x0-Q1, 36-V, 1-A/2-A Buck Converter with 1.5-µA IQ in 4-mm2 HotRod™ QFN
1 Features
3 Description
•
•
•
AEC-Q100-qualified for automotive applications:
– Temperature grade 1: –40°C to +125°C, TA
> 85% efficiency at 1 mA
– 1.5-µA IQ (switching) at 13.5 VIN, 3.3 fixed VOUT
Miniature solution size and low component cost
– 2-mm × 2-mm HotRod™ package with wettable
flanks
The LMR436x0-Q1 is the industry's smallest 36 V, 2 A
and 1 A synchronous step-down DC/DC converters in
2-mm x 2-mm HotRod™ package. This easy-to-use
converter supports a wide input voltage range of 3.0V
to 36 V with transients up to 42 V.
The LMR43620-Q1 is specifically designed to meet
low standby power requirements for always on,
automotive
applications.
Auto-mode
enables
– Internal compensation
frequency foldback when operating at light loads,
allowing an unloaded current consumption of 1.5 µA
at 13.5 VIN and high light load efficiency. Seamless
transition between PWM and PFM modes along with
very low MOSFET ON resistances ensures
exceptional efficiency across the entire load range.
•
•
Optimized for ultra-low EMI requirements
– Spread spectrum reduces peak emissions
– Pin selectable FPWM mode for constant
frequency at light loads with MODE/SYNC pin
– FSW synchronization with MODE/SYNC pin
Designed for automotive automotive applications
– Junction temperature range: –40°C to +150°C
– Supports 42-V automotive load dump
– Supports 3-VIN for automotive cold crank
– Adjustable up to 95% of VIN, 3.3-V and 5-V
fixed VOUT options available
The control architecture and feature-set are optimized
for an ultra-small solution size. The device uses peak
current mode control to minimize output capacitance.
The LMR436x0-Q1 minimizes input filter size by
utilizing pseudo-random spread spectrum, a low-EMI
HotRod™ package, and an optimized pin-out. The
MODE/SYNC and RT pin variants can be used to set
or synchronize the frequency between 200 kHz and
2.2 MHz to avoid noise sensistive frequency bands.
•
Suitable for scalable power supplies
– Adjustable FSW: 200 kHz - 2.2 MHz with RT pin
– Pin compatible with:
•
•
LMR36506-Q1 (65 V, 600 mA)
LMR36503-Q1 (65 V, 300 mA)
The rich feature set of the LMR436x0-Q1 is designed
to simplify implementation for a wide range of
automotive end equipments.
2 Applications
Device Information
•
•
•
Advanced driver assistance systems: radar ECU
Infotainment and cluster: head unit, eCall
Body electronics and lighting
PART NUMBER
LMR43620-Q1
LMR43610-Q1
PACKAGE(1)
VQFN-HR (9)
VQFN-HR (9)
BODY SIZE (NOM)
2.00 mm × 2.00 mm
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
100
90
80
70
60
50
40
30
20
VIN = 12 V
VIN = 24 V
10
0
1E-5
0.0001
0.001 0.01
Load Current (A)
0.10.2 0.5 1
2
SNVS
Typical Solution Size
Efficiency: VOUT = 3.3 V (Fixed), 2.2 MHz
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
Copyright © 2020 Texas Instruments Incorporated
Submit Document Feedback
intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change
Product Folder Links: LMR43620-Q1 LMR43610-Q1
1
without notice.
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