LM21212-1 Series

2.95-5.5V, 12A, Voltage Mode Synchronous Buck Regulator with Frequency Synchronization

Catalog

2.95-5.5V, 12A, Voltage Mode Synchronous Buck Regulator with Frequency Synchronization

Part	Current - Output	Mounting Type	Output Type	Output Configuration	Voltage - Input (Max) [Max]	Topology	Operating Temperature [Min]	Operating Temperature [Max]	Function	Number of Outputs	Voltage - Input (Min) [Min]	Frequency - Switching [Max]	Frequency - Switching [Min]	Voltage - Output (Min/Fixed)	Package / Case	Package / Case [custom]	Package / Case	Voltage - Output (Max) [Max]	Supplier Device Package	Frequency - Switching	Main Purpose	Supplied Contents	Voltage - Output	Outputs and Type	Outputs and Type	Board Type	Utilized IC / Part	Regulator Topology
Texas Instruments LM21212MH-2/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V	1.55 MHz	300 kHz	0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP
Texas Instruments LM21212MHX-2/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V	1.55 MHz	300 kHz	0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP
Texas Instruments LM21212MHX-1/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V			0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP	1 MHz
Texas Instruments LM21212-1EVM/NOPB	12 A											1.5 MHz	300 kHz								DC/DC Step Down	Board(s)	1.2 V	Non-Isolated	1	Fully Populated	LM21212-1	Buck
Texas Instruments LM21212MH-1/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V			0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP	1 MHz
Texas Instruments LM21212-1EVM	12 A											1.5 MHz	300 kHz								DC/DC Step Down	Board(s)	1.2 V	Non-Isolated	1	Fully Populated	LM21212-1	Buck
Texas Instruments LM21212AMHE-1/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V			0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP	1 MHz
Texas Instruments LM21212AMHX-1/NOPB	12 A	Surface Mount	Adjustable	Positive	5.5 V	Buck	-40 °C	125 ¯C	Step-Down	1	2.95 V			0.6 V	20-PowerTSSOP	4.4 mm	0.173 in	5.5 V	20-HTSSOP	1 MHz

Catalog

2.95-5.5V, 12A, Voltage Mode Synchronous Buck Regulator with Frequency Synchronization

Key Features

• Integrated 7-mΩ High Side and 4.3-mΩ Low-Side FET Switches300-kHz to 1.55-MHz Resistor-Adjustable FrequencyAdjustable Output Voltage from 0.6 V to VIN(100% Duty Cycle Capable), ±1% ReferenceInput Voltage Range 2.95 V to 5.5 VStartup Into Prebiased LoadsOutput Voltage Tracking CapabilityWide Bandwidth Voltage Loop Error AmplifierAdjustable Soft-Start With External CapacitorPrecision Enable Pin With HysteresisIntegrated OVP, OCP, OTP, UVLO, and Power-GoodThermally Enhanced 20-Pin HTSSOP Exposed Pad PackageCreate a custom design using the LM21212-2 with theWEBENCH®Power DesignerIntegrated 7-mΩ High Side and 4.3-mΩ Low-Side FET Switches300-kHz to 1.55-MHz Resistor-Adjustable FrequencyAdjustable Output Voltage from 0.6 V to VIN(100% Duty Cycle Capable), ±1% ReferenceInput Voltage Range 2.95 V to 5.5 VStartup Into Prebiased LoadsOutput Voltage Tracking CapabilityWide Bandwidth Voltage Loop Error AmplifierAdjustable Soft-Start With External CapacitorPrecision Enable Pin With HysteresisIntegrated OVP, OCP, OTP, UVLO, and Power-GoodThermally Enhanced 20-Pin HTSSOP Exposed Pad PackageCreate a custom design using the LM21212-2 with theWEBENCH®Power Designer

Description

The LM21212-1 is a monolithic synchronous point-of-load buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty-cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use. The LM21212-1 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit. The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300 kHz to 1.5 MHz. If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks. The LM21212-1 is a monolithic synchronous point-of-load buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty-cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use. The LM21212-1 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit. The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300 kHz to 1.5 MHz. If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.