Texas Instruments LMR604403SRAKR
Manufacturer No:
LMR604403SRAKR
Manufacturer:
Texas Instruments
Package:
Description:
36V, 4A, synchronous buck converter with low Iq and high efficiency with minimized COUT
Quantity:
In Stock :7591
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Expected Shipping：Wed, Jun 10 - Thu, Jun 11, 2026
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Date Code：Within 2 Years
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LMR604403SRAKR Information
Texas Instruments LMR604403SRAKR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LMR604403SRAKR.
- Type
- Parameter
- Rating
- Catalog
- Topology
- Buck
- Iout (max) (A)
- 4
- Vin (max) (V)
- 36
- Vin (min) (V)
- 3
- Vout (max) (V)
- 34
- Vout (min) (V)
- 1
- Features
- Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package
- EMI features
- Low parasitic Hotrod packaging, Spread Spectrum
- Control mode
- current mode
- Type
- Parameter
- Switching frequency (min) (kHz)
- 200
- Switching frequency (max) (kHz)
- 2200
- TI functional safety category
- Functional Safety-Capable
- Operating temperature range (°C)
- -40 to 150
- Iq (typ) (µA)
- 4
- Duty cycle (max) (%)
- 98
- Type
- Converter
- Package
- WQFN-HR (RAK)
- Pins
- 9
- Size
- 5 mm² 2.5 x 2
Download datasheets and manufacturer documentation for Texas Instruments LMR604403SRAKR.
Data sheet:
Functional safety information:
The LMR60440 is a 3V to 36V (42V transient), 4A synchronous buck converter designed for industrial applications. The LMR60440 offers variants with spread spectrum in an ultra-compact, 2.5mm × 2mm, HotRod QFN-9 package, which reduces inductance and achieves low electromagnetic interference (EMI) performance to facilitate qualification of industrial and other noise-sensitive designs. All device variants are capable of output voltages ranging from 1V to 20V by including a resistor divider between the output voltage node, feedback, and ground. Each variant of the device is also capable of delivering a fixed output voltage by connecting the output voltage node directly to the feedback pin. The Device Comparison Table provides details on the fixed output voltage options. The current-mode control architecture with 40ns minimum on-time allows high conversion ratios at high frequencies, easy loop compensation, fast transient response, and excellent load and line regulation. An open drain power-good output facilitates power sequencing requirements. The MODE/SYNC pin of the LMR60440 allows the user to select between modes of operation. Forced pulse width modulation (FPWM) mode results in constant switching frequency across load while auto mode allows for seamless transitions between pulse width modulation (PWM) and pulse frequency modulation (PFM) switching. In auto mode, the LMR60440 consumes only 5µA of quiescent current, which makes sure of high efficiency at all loads. Few external components are needed allowing for compact PCB layout. The LMR60440 is a part of a family of pin compatible devices ranging in current levels from 0.6A to 6A.
- Functional Safety-Capable
- Wide operating input voltage: 3V to 36V (42V absolute maximum)
- Ultra-low quiescent current
- Shutdown current: 0.65µA
- No load standby current: 5µA
- Pin programmable output voltage options available in fixed 3.3V/ADJ and 5V/ADJ
- Adjustable output voltage range from 1V to 20V
- Low minimum tON (30ns typical)
- Optimized for low electromagnetic interference (EMI) requirements:
- Low inductance HotRod™ QFN package
- Spread spectrum options available
- Programmable switching frequency from 200kHz – 2.2MHz
- FPWM, PFM, or external frequency synchronization available
- Designed for scalable power supplies
- Pin compatible with LMR60406, LMR60410, LMR60420, and LMR60430
- Power-Good output for power sequencing
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