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AC/DC & DC/DC controllers (external FET)

TPS40345

現行

適用於成本最佳化應用的 3V 至 20V、25A 同步降壓控制器

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產品規格表

TPS40345

現行
產品規格表 立即訂購

產品詳細資料

Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 25 Operating temperature range (°C) -20 to 85 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 18 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 90
Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 25 Operating temperature range (°C) -20 to 85 Control mode Voltage mode Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 18 Iq (typ) (A) 0.0025 Duty cycle (max) (%) 90
VSON (DRC) 10 9 mm² 3 x 3
  • Input Voltage Range From 3 V to 20 V
  • 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 600-mV, 1.3% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad
  • Input Voltage Range From 3 V to 20 V
  • 600-kHz Switching Frequency
  • High- and Low-Side FET RDS(on) Current Sensing
  • Programmable Thermally Compensated OCP Levels
  • Programmable Soft-Start
  • 600-mV, 1.3% Reference Voltage
  • Voltage Feed-Forward Compensation
  • Supports Prebiased Output
  • Frequency Spread Spectrum
  • Thermal Shutdown Protection at 145°C
  • 10-Pin 3-mm × 3-mm VSON Package With Ground Connection to Thermal Pad

The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.

The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.

The TPS40345 is a synchronous buck controller that operates from 3-V to 20-V input and which can be used in cost-optimized applications. The controller implements a voltage-mode control architecture with input-voltage feed-forward compensation that responds instantly to a change in input voltage. The switching frequency is fixed at 600 kHz.

The frequency spread spectrum (FSS) feature adds to the switching frequency, significantly reducing the peak EMI noise and making it much easier to comply with EMI standards.

The TPS40345 offers design with a variety of user-programmable functions, including soft-start, overcurrent protection (OCP) levels, and loop compensation.

OCP level may be programmed by a single external resistor connected from the LDRV pin to circuit ground. During initial power on, the TPS40345 enters a calibration cycle, measures the voltage at the LDRV pin, and sets an internal OCP voltage level. During operation, the programmed OCP voltage level is compared to the voltage drop across the low-side FET when it is on to determine whether there is an overcurrent condition. The TPS40345 then enters a shutdown and restart cycle until the fault is removed.
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* Data sheet TPS40345 3-V to 20-V Input Synchronous Buck Controller datasheet PDF | HTML 2017年 12月 7日
User guide TPS40345 Buck Controller Evaluation Module User's Guide (Rev. A) PDF | HTML 2022年 1月 3日
Analog Design Journal Maximizing power density and thermal performance in power-module designs 2018年 12月 12日

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開發板

TPS40345EVM-353 — TPS40345、8V 至 14V 輸入、1.2V 輸出同步降壓轉換器評估模組

The TPS40345EVM-353 evaluation module (EVM) is a synchronous buck converter providing a fixed 1.2-V output at up to 20A from a 12-V input bus.
使用指南: PDF | HTML
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TPS40345 PSpice Transient Model

SLUM612.ZIP (85 KB) - PSpice Model
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模擬型號

TPS40345 Unencrypted PSpice Transient Model

SLUM611.ZIP (9 KB) - PSpice Model
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