LM21212-1

Name: LM21212-1
Brand: TI
SKU: LM21212-1
Price: 3.173 USD

現行

具頻率同步的 2.95-5.5V、12A 電壓模式同步降壓穩壓器

立即訂購

產品規格表

document-pdfAcrobat LM21212-1 2.95-V To 5.5-V, 12-A, Voltage-Mode Synchronous Buck Regulator With Frequency Synchronization datasheet (Rev. F) (英文) PDF | HTML

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LM21212-1

現行

產品規格表

立即訂購

產品詳細資料

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

12

Vin (min) (V)

2.95

Vin (max) (V)

5.5

Switching frequency (min) (kHz)

300

Switching frequency (max) (kHz)

1500

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

Voltage mode

Vout (min) (V)

0.6

Vout (max) (V)

5.5

Iq (typ) (µA)

1500

Duty cycle (max) (%)

100

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Topology

Buck

Type

Converter

Iout (max) (A)

12

Vin (min) (V)

2.95

Vin (max) (V)

5.5

Switching frequency (min) (kHz)

300

Switching frequency (max) (kHz)

1500

Features

Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking

Control mode

Voltage mode

Vout (min) (V)

0.6

Vout (max) (V)

5.5

Iq (typ) (µA)

1500

Duty cycle (max) (%)

100

HTSSOP (PWP)

20

41.6 mm² 6.5 x 6.4

Integrated 7-mΩ high-side and 4.3-mΩ low-side FET switches
300-kHz to 1.5-MHz frequency SYNC pin
Adjustable output voltage from 0.6 V to V_IN (100% duty cycle capable), ±1% reference
Input voltage range 2.95 V to 5.5 V
Start-up Into prebiased loads
Output voltage tracking capability
Wide bandwidth voltage loop error amplifier
Adjustable soft-start with external capacitor
Precision enable (EN) pin with hysteresis
Integrated OVP, OCP, OTP, UVLO and power-good
Thermally enhanced HTSSOP-20 exposed pad package
Create a custom design using the LM21212-1 with the WEBENCH^® Power Designer

Integrated 7-mΩ high-side and 4.3-mΩ low-side FET switches
300-kHz to 1.5-MHz frequency SYNC pin
Adjustable output voltage from 0.6 V to V_IN (100% duty cycle capable), ±1% reference
Input voltage range 2.95 V to 5.5 V
Start-up Into prebiased loads
Output voltage tracking capability
Wide bandwidth voltage loop error amplifier
Adjustable soft-start with external capacitor
Precision enable (EN) pin with hysteresis
Integrated OVP, OCP, OTP, UVLO and power-good
Thermally enhanced HTSSOP-20 exposed pad package
Create a custom design using the LM21212-1 with the WEBENCH^® Power Designer

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.

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	類型	標題		日期
*	Data sheet	LM21212-1 2.95-V To 5.5-V, 12-A, Voltage-Mode Synchronous Buck Regulator With Frequency Synchronization datasheet (Rev. F)	PDF \| HTML	2019年 5月 21日
	Selection guide	Buck Converter Quick Reference Guide (Rev. B)		2021年 4月 8日
	Selection guide	Power Management Guide 2018 (Rev. R)		2018年 6月 25日
	User guide	AN-2107 LM21212-1 Evaluation Board (Rev. B)		2013年 5月 5日

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開發板

LM21212-1EVM — LM21212-1EVM 評估板

This evaluation board provides a solution to examine the high efficiency LM21212-1 buck switching regulator. The LM21212-1 is capable of driving up to 12A of continuous load current with excellent output voltage accuracy due to its ±1% internal reference. This device also features a clock (...)

使用指南: PDF