LMR51420 Series

SIMPLE SWITCHER® power converter 4.5V-to-36V, 2A, synchronous buck with 40µA IQ

Catalog

SIMPLE SWITCHER® power converter 4.5V-to-36V, 2A, synchronous buck with 40µA IQ

Part	Current - Output	Mounting Type	Number of Outputs	Function	Voltage - Input (Max) [Max]	Frequency - Switching	Voltage - Input (Min) [Min]	Supplier Device Package	Output Type	Voltage - Output (Min/Fixed)	Package / Case	Voltage - Output (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Synchronous Rectifier	Topology
Texas Instruments LMR51420YDDCR	2 A	Surface Mount	1	Step-Down	36 V	1.1 MHz	4.5 V	SOT-23-THIN	Adjustable	0.6 V	SOT-23-6 Thin TSOT-23-6	34.2 V	150 °C	-40 °C	Positive		Buck
Texas Instruments LMR51420XFDDCR	2 A	Surface Mount	1	Step-Down	36 V	500 kHz	4.5 V	SOT-23-THIN	Adjustable	0.6 V	SOT-23-6 Thin TSOT-23-6	34.2 V	150 °C	-40 °C	Positive		Buck

Catalog

SIMPLE SWITCHER® power converter 4.5V-to-36V, 2A, synchronous buck with 40µA IQ

Key Features

• Functional Safety-CapableDocumentation available to aid functional safety system designConfigured for rugged industrial applications4.5-V to 36-V input voltage range2-A continuous output current70-ns minimum switching on time500-kHz and 1.1-MHz fixed switching frequency options–40°C to 150°C junction temperature range98% maximum duty cycleStart-up with prebiased outputInternal short circuit protection with hiccup mode±1.5% tolerance voltage referencePrecision enableSmall solution size and ease of useIntegrated synchronous rectificationInternal compensation for ease of useSOT-23 packagePin-to-pin compatible with theTPS54202andTPS54302PFM and forced PWM (FPWM) options availableCreate a custom design using the LMR51420 with theWEBENCH Power DesignerFunctional Safety-CapableDocumentation available to aid functional safety system designConfigured for rugged industrial applications4.5-V to 36-V input voltage range2-A continuous output current70-ns minimum switching on time500-kHz and 1.1-MHz fixed switching frequency options–40°C to 150°C junction temperature range98% maximum duty cycleStart-up with prebiased outputInternal short circuit protection with hiccup mode±1.5% tolerance voltage referencePrecision enableSmall solution size and ease of useIntegrated synchronous rectificationInternal compensation for ease of useSOT-23 packagePin-to-pin compatible with theTPS54202andTPS54302PFM and forced PWM (FPWM) options availableCreate a custom design using the LMR51420 with theWEBENCH Power Designer

Description

The LMR51420 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source. The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allows the device to be used with minimum external components. The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR51420 is available in a 6-pin SOT-23 package. The LMR51420 is a wide-VIN, easy-to-use SIMPLE SWITCHER power converter synchronous buck converter capable of driving up to 2-A load current. With a wide input range of 4.5 V to 36 V, the device is suitable for a wide range of industrial applications for power conditioning from an unregulated source. The LMR51420 operates at 500-kHz and 1.1-MHz switching frequency to support use of relatively small inductors for an optimized solution size. The device has a PFM version to realize high efficiency at light load and FPWM version to achieve constant frequency, and small output voltage ripple over the full load range. Soft-start and compensation circuits are implemented internally, which allows the device to be used with minimum external components. The device has built-in protection features, such as cycle-by-cycle current limit, hiccup mode short-circuit protection, and thermal shutdown in case of excessive power dissipation. The LMR51420 is available in a 6-pin SOT-23 package.