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LM34936

現行

30V 寬輸入電壓同步 4 開關降壓/升壓控制器

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產品規格表

LM34936

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck-Boost Vin (max) (V) 30 Vin (min) (V) 4.2 Vout (max) (V) 30 Vout (min) (V) 0.8 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Prebias startup, Synchronous rectification, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.002 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Buck-Boost Vin (max) (V) 30 Vin (min) (V) 4.2 Vout (max) (V) 30 Vout (min) (V) 0.8 Features Adjustable current limit, Enable, Frequency synchronization, Power good, Prebias startup, Synchronous rectification, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Duty cycle (max) (%) 100 Iq (typ) (A) 0.002 Operating temperature range (°C) -40 to 125
VQFN (RHF) 28 20 mm² 5 x 4
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 30 V (42-V maximum)
  • Flexible VOUT: 0.8 V to 30 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable lnput UVLO and soft start
  • Power good and output overvoltage protection
  • Available in QFN-28 package
  • Create a custom design using the LM34936 with the WEBENCH Power Designer
  • Single inductor buck-boost controller for step-up/step-down DC/DC conversion
  • Wide VIN: 4.2 V (2.5 V with bias) to 30 V (42-V maximum)
  • Flexible VOUT: 0.8 V to 30 V
  • VOUT short protection
  • High efficiency buck-boost transition
  • Adjustable switching frequency
  • Optional frequency sync and dithering
  • Integrated 2-A MOSFET gate drivers
  • Cycle-by-cycle current limit and optional hiccup
  • Optional input or output average current limiting
  • Programmable lnput UVLO and soft start
  • Power good and output overvoltage protection
  • Available in QFN-28 package
  • Create a custom design using the LM34936 with the WEBENCH Power Designer

The LM34936 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM34936 operates over a wide input voltage range of 4.2 V to 30 V (42-V absolute maximum) to support a variety of applications.

The LM34936 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM34936 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.

The LM34936 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM34936 operates over a wide input voltage range of 4.2 V to 30 V (42-V absolute maximum) to support a variety of applications.

The LM34936 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.

The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM34936 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
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類型 標題 日期
* Data sheet LM34936 30-V Wide VIN Synchronous 4-Switch Buck-Boost Controller datasheet (Rev. A) PDF | HTML 2021年 8月 13日
Certificate LM34936EVM EU Declaration of Conformity (DoC) 2023年 11月 14日
Technical article Adjusting VOUT in USB Type-C™ and wireless charging applications, part 2 PDF | HTML 2020年 2月 18日
Technical article Adjusting VOUT in USB Type-C™ and wireless charging applications, part 1 PDF | HTML 2020年 2月 10日
Technical article Four-switch buck-boost layout tip No. 4: routing gate-drive and return paths PDF | HTML 2019年 2月 20日
Technical article Four-switch buck-boost layout tip No. 3: separating differential sense lines from PDF | HTML 2017年 3月 2日
Technical article Four-switch buck-boost layout tip No. 2: optimizing hot loops in the power stage PDF | HTML 2017年 2月 23日
Technical article Four-switch buck-boost layout tip No. 1: identifying the critical parts for layout PDF | HTML 2017年 2月 20日

設計與開發

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開發板

LM34936EVM — LM34936 評估模組

LM34936EVM 搭載以 TI LM34936 大範圍 VIN 降壓升壓控制器為基礎的四開關降壓升壓轉換器。此轉換器的設計可在 6V 至 30V 的輸入電壓範圍內運作，並以高達 6A 的負載電流提供 12V 穩壓輸出。
使用指南: PDF
TI.com 無法提供
模擬型號

LM34936 PSpice Transient Model

SNVMBL5.ZIP (130 KB) - PSpice Model
下載
CAD/CAE 符號

LM34936EVM Altium CAD Files

SNVR492.ZIP (752 KB)
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計算工具

LM34936-BUCK-BOOST-QUICKSTART-TOOL — LM34936 Buck-Boost Quickstart Tool

The LM34936 Buck-Boost Quickstart Tool support to configure the power stage and the external components for the LM34936.
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產品
DC/DC controllers
  • LM34936 — 30V 寬輸入電壓同步 4 開關降壓/升壓控制器
  • LM34936-Q1 — 車用 30V 寬輸入電壓同步 4 開關降壓/升壓控制器
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VQFN (RHF) 28 Ultra Librarian
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