LMR51410 Series

SIMPLE SWITCHER® 4V to 42V, 1A synchronous buck converter with 26.5uA IQ

Catalog

SIMPLE SWITCHER® 4V to 42V, 1A synchronous buck converter with 26.5uA IQ

Part	Function	Supplier Device Package	Package / Case	Frequency - Switching	Current - Output	Topology	Output Type	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Synchronous Rectifier	Voltage - Output (Min/Fixed)	Output Configuration	Mounting Type	Voltage - Output (Max)
Texas Instruments LMR51410XDBVR	Step-Down	SOT-23-6	SOT-23-6	400 kHz	1 A	Buck	Adjustable	1	150 °C	-40 °C	4 V	42 V		0.8 V	Positive	Surface Mount	28 V
Texas Instruments LMR51410YDBVR	Step-Down	SOT-23-6	SOT-23-6	1.1 MHz	1 A	Buck	Adjustable	1	150 °C	-40 °C	4 V	42 V		0.8 V	Positive	Surface Mount	28 V

Catalog

SIMPLE SWITCHER® 4V to 42V, 1A synchronous buck converter with 26.5uA IQ

Key Features

• Functional Safety-CapableDocumentation available to aid functional safety system designConfigured for rugged industrial applications4V to 42V input voltage rangeInput transient protection up to 50V0.6A / 1A continuous output current80ns minimum switching on timeFixed 400kHz and 1.1MHz switching frequency–40°C to 150°C junction temperature range98% maximum duty cycleMonotonic start-up with prebiased outputShort-circuit protection with hiccup modePrecision enable±1.5% tolerance voltage referenceSmall design size and ease of useIntegrated synchronous rectificationInternal compensation for ease of useSOT-23 packageVarious options in pin-to-pin compatible packagePFM and forced PWM (FPWM) optionsPin-to-pin compatible with theLMR51610,LMR16006,LV2862,LMR50410,TPS560430andLMR54410Create a custom design using the LMR514xx with theWEBENCH Power DesignerFunctional Safety-CapableDocumentation available to aid functional safety system designConfigured for rugged industrial applications4V to 42V input voltage rangeInput transient protection up to 50V0.6A / 1A continuous output current80ns minimum switching on timeFixed 400kHz and 1.1MHz switching frequency–40°C to 150°C junction temperature range98% maximum duty cycleMonotonic start-up with prebiased outputShort-circuit protection with hiccup modePrecision enable±1.5% tolerance voltage referenceSmall design size and ease of useIntegrated synchronous rectificationInternal compensation for ease of useSOT-23 packageVarious options in pin-to-pin compatible packagePFM and forced PWM (FPWM) optionsPin-to-pin compatible with theLMR51610,LMR16006,LV2862,LMR50410,TPS560430andLMR54410Create a custom design using the LMR514xx with theWEBENCH Power Designer

Description

The LMR514xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 0.6A and 1A load current. With a wide input range of 4V to 42V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source. The LMR514xx operates at 400kHz and 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The LMR514xx has a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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 LMR514xx is a wide-VIN, easy-to-use synchronous buck converter capable of driving up to 0.6A and 1A load current. With a wide input range of 4V to 42V, the device is designed for a wide range of industrial applications for power conditioning from an unregulated source. The LMR514xx operates at 400kHz and 1.1MHz switching frequency to support use of relatively small inductors for an optimized design size. The LMR514xx has a PFM version to realize high efficiency at light load and a 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 allow the device to be used with minimal 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.