首頁 電源管理 AC/DC & DC/DC converters (integrated FET)
首頁
電源管理
AC/DC & DC/DC converters (integrated FET)

LM3243

現行

具類比電流旁通模式且適用 2G/3G/4G PA 的 2.7MHz、2.5A 降壓式 DC-DC 轉換器

立即訂購
產品規格表

LM3243

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 2.5 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2430 Switching frequency (max) (kHz) 2970 Features Fixed Output Control mode Voltage mode Vout (min) (V) 0.4 Vout (max) (V) 3.6 Rating Catalog Operating temperature range (°C) -30 to 90 Iq (typ) (A) 0.00026
Iout (max) (A) 2.5 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Topology Buck Type Converter Switching frequency (min) (kHz) 2430 Switching frequency (max) (kHz) 2970 Features Fixed Output Control mode Voltage mode Vout (min) (V) 0.4 Vout (max) (V) 3.6 Rating Catalog Operating temperature range (°C) -30 to 90 Iq (typ) (A) 0.00026
DSBGA (YFQ) 16 3.24 mm² 1.8 x 1.8
  • Input Voltage Range: 2.7 V to 5.5 V
  • High-Efficiency PFM and PWM Modes With
    Internal Synchronous Rectification
  • Analog Bypass Function with Low Dropout
    Resistance (45 mΩ Typical)
  • Dynamically Adjustable Output Voltage: 0.4 V to
    3.6 V (Typical) in PFM and PWM Modes
  • Maximum Load Current: 2.5 A in PWM Mode
  • PWM Switching Frequency: 2.7 MHz (Average)
  • Modulated Switching Frequency to Aid Rx Band
    Compliance
  • Operates From a Single Li-ion Cell
    (2.7 V to 5.5 V)
  • Current and Thermal Overload Protection
  • ACB Reduces Inductor Requirements and Size
  • Minimum Total Solution Size by Using Small
    Footprint and Case Size Inductor and Capacitors
  • Input Voltage Range: 2.7 V to 5.5 V
  • High-Efficiency PFM and PWM Modes With
    Internal Synchronous Rectification
  • Analog Bypass Function with Low Dropout
    Resistance (45 mΩ Typical)
  • Dynamically Adjustable Output Voltage: 0.4 V to
    3.6 V (Typical) in PFM and PWM Modes
  • Maximum Load Current: 2.5 A in PWM Mode
  • PWM Switching Frequency: 2.7 MHz (Average)
  • Modulated Switching Frequency to Aid Rx Band
    Compliance
  • Operates From a Single Li-ion Cell
    (2.7 V to 5.5 V)
  • Current and Thermal Overload Protection
  • ACB Reduces Inductor Requirements and Size
  • Minimum Total Solution Size by Using Small
    Footprint and Case Size Inductor and Capacitors

The LM3243 is a DC-DC converter optimized for powering multi-mode 2G, 3G, and 4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3243 steps down an input voltage from 2.7 V to 5.5 V to a dynamically adjustable output voltage of 0.4 V to 3.6 V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA.

The LM3243 operates in constant frequency PWM mode producing a small and predictable amount of output voltage ripple. This enables best ECTEL power requirements in GMSK and EDGE spectral compliance, with the minimal amount of filtering and excess headroom. When operating in PFM mode, the LM3243 enables the lowest DG09 current consumption and therefore maximizes system efficiency.

The LM3243 has a unique ctive urrent assist and analog ypass (ACB) feature to minimize inductor size without any loss of output regulation for the entire battery voltage and RF output power range, until dropout. ACB provides a parallel current path, when needed, to limit the maximum inductor current to 1.4 A (typical) while still driving a 2.5-A load. The ACB also enables operation with minimal dropout voltage. When considering using the LM3243 in a system design, see the Layout section of this data sheet.

The LM3243 is a DC-DC converter optimized for powering multi-mode 2G, 3G, and 4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3243 steps down an input voltage from 2.7 V to 5.5 V to a dynamically adjustable output voltage of 0.4 V to 3.6 V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA.

The LM3243 operates in constant frequency PWM mode producing a small and predictable amount of output voltage ripple. This enables best ECTEL power requirements in GMSK and EDGE spectral compliance, with the minimal amount of filtering and excess headroom. When operating in PFM mode, the LM3243 enables the lowest DG09 current consumption and therefore maximizes system efficiency.

The LM3243 has a unique ctive urrent assist and analog ypass (ACB) feature to minimize inductor size without any loss of output regulation for the entire battery voltage and RF output power range, until dropout. ACB provides a parallel current path, when needed, to limit the maximum inductor current to 1.4 A (typical) while still driving a 2.5-A load. The ACB also enables operation with minimal dropout voltage. When considering using the LM3243 in a system design, see the Layout section of this data sheet.
open-in-new 尋找其它 AC/DC & DC/DC converters (integrated FET)
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 3
類型 標題 日期
* Data sheet LM3243 High-Current Step-Down Converter for 2G, 3G, and 4G RF Power Amplifiers datasheet (Rev. C) PDF | HTML 2015年 8月 28日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
User guide AN-2105 LM3243 DSBGA Evaluation Board (Rev. AP) 2013年 3月 3日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

封裝 引腳 下載
DSBGA (YFQ) 16 檢視選項
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 資格摘要
  • 進行中可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片