Datasheet > TPS54122-Q1

TPS54122-Q1

更新时间： 2024-09-19 01:08:39

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
40页	2280K
描述
TPS54122-Q1 Dual-Output, 3-A, QuietSupplyâ¢ with Integrated DC-DC Converter and Low-Noise LDO

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TPS54122-Q1

SBVS253A –JANUARY 2015–REVISED MAY 2015

TPS54122-Q1 Dual-Output, 3-A, QuietSupply™

with Integrated DC-DC Converter and Low-Noise LDO

1 Features

3 Description

The TPS54122-Q1 combines the efficiency of a step-

down switching (dc-dc) converter with a high power-

supply rejection (PSR), low-noise, low-dropout

regulator (LDO) to provide an ultralow-noise power

supply that delivers QuietSupply rails to noise-

sensitive applications.

•

AEC-Q100 Qualified with the Following Results:

–

Device Temperature Grade 1: –40°C to 125°C

Ambient Operating Temperature Range

–

Device HBM ESD Classification Level H2

Device CDM ESD Classification Level C4B

The TPS54122-Q1 is ideally suited for systems with

5-V power busses and can support 3-A continuous

output current on both the dc-dc or LDO output. The

LDO output voltage can be set from 0.8 V to 3.6 V

and the dc-dc can be adjusted from 0.83 V to 5.0 V

using external resistors. The TPS54122-Q1 can be

used in a wide range of low-noise applications

because the dc-dc converter and LDO are completely

configurable. In addition, the TPS54122-Q1 includes

features such as soft-start, switching frequency

synchronization, and a power-good signal.

•

Input Voltage Range:

–

VIN: 2.95 V to 6.0 V

LDOIN: V_OUT+ V_DOto 5.5 V

BIAS: 2.375 V to 5.5 V

•

Provides Two Configurable Supply Rails

Independent Enable, Power Good, and Soft-Start

3-A, High-Efficiency, Synchronous, Step-Down

Switcher:

–

Output Voltage Adjustable Down to 0.8 V

Sync to External Clock: 300 kHz to 2 MHz

1% Reference Accuracy

The TPS54122-Q1 can also be configured as a dual-

supply rail device, supplying a total of 3 A.

The TPS54122-Q1 is available in a space-saving,

3.5-mm × 5.5-mm VQFN package, and is specified to

operate over a –40°C to 125°C ambient temperature

range. The TPS54122-Q1 is suited for automotive

applications because the device is qualified for AEC-

Q100 grade 1.

•

3-A, Low-Noise LDO:

–

Output Noise: 17 µV_RMSat 10 Hz to 1 MHz

with DC-DC Running

–

Output Voltage Range: 0.8 V to 3.6 V

Ultralow Dropout: 100 mV (typ) at 3 A

1% Output Accuracy

Device Information⁽¹⁾

Excellent Load and Line Transient Response

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Small Package: 5.5-mm × 3.5-mm VQFN-24

TPS54122-Q1

VQFN (24)

5.50 mm × 3.50 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

2 Applications

•

Power Optimization in Automotive ECU Power

Automotive Infotainment Systems

Automotive ADAS Systems

TPS54122-Q1

12 V

3.3 V

Powering Sensitive Clocking-Distribution Circuits

DC-DC

Powering RF Components:

VCOs, Receivers, and ADCs

VIN (DC-DC)

DC-DC Output

Battery

1.2 V

1.8 V

VCORE

Microprocessor

VCCIO

LDOIN

LDO Output

3.3 V

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...40

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与TPS54122-Q1相关器件

型号	品牌	获取价格	描述	数据表
TPS54122-Q1_15	TI	获取价格	TPS54122-Q1 Dual-Output, 3-A, QuietSupplyâ¢
TPS54122QRHLRQ1	TI	获取价格	TPS54122-Q1 Dual-Output, 3-A, QuietSupplyâ¢
TPS54140	TI	获取价格	1.5-A, 42V STEP DOWN SWIFT™ DC/DC CONVERTER W
TPS54140A	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140ADGQ	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140ADGQR	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140ADRC	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140ADRCR	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140ADRCT	TI	获取价格	1.5-A, 42 V Step Down SWIFTâ¢ DC/DC Converte
TPS54140DGQ	TI	获取价格	1.5-A, 42V STEP DOWN SWIFT™ DC/DC CONVERTER W

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