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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM3269

現行

適用 LTE 和 HSPA RF 功率放大器的無縫轉換降壓/升壓轉換器

立即訂購
產品規格表

LM3269

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.75 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 2100 Switching frequency (max) (kHz) 2700 Features Adaptive/Dynamic Voltage Scaling, Enable, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO fixed Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.2 Iq (typ) (µA) 900 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.75 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 2100 Switching frequency (max) (kHz) 2700 Features Adaptive/Dynamic Voltage Scaling, Enable, Over Current Protection, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO fixed Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 4.2 Iq (typ) (µA) 900 Duty cycle (max) (%) 100
DSBGA (YZR) 12 3.9375 mm² 2.25 x 1.75
  • Operates From a Single Li-Ion Cell: 2.7 V to 5.5 V
  • Adjustable Output Voltage: 0.6 V to 4.2 V
  • Automatic PFM or PWM Mode Change
  • 750-mA Maximum Load Capability for
    VBATT ≥ 3 V, VOUT = 3.8 V
  • 2.4-MHz (typical) Switching Frequency
  • Seamless Buck-Boost Mode Transition
  • Fast Output Voltage Transition: 1.4 V to 3 V
    in 10 µs
  • High-Efficiency: 95% typical at VBATT = 3.7 V,
    VOUT = 3.3 V, at 300 mA
  • Input Overcurrent Limit
  • Internal Compensation
  • Operates From a Single Li-Ion Cell: 2.7 V to 5.5 V
  • Adjustable Output Voltage: 0.6 V to 4.2 V
  • Automatic PFM or PWM Mode Change
  • 750-mA Maximum Load Capability for
    VBATT ≥ 3 V, VOUT = 3.8 V
  • 2.4-MHz (typical) Switching Frequency
  • Seamless Buck-Boost Mode Transition
  • Fast Output Voltage Transition: 1.4 V to 3 V
    in 10 µs
  • High-Efficiency: 95% typical at VBATT = 3.7 V,
    VOUT = 3.3 V, at 300 mA
  • Input Overcurrent Limit
  • Internal Compensation

The LM3269 is buck-boost DC-DC converter designed to generate output voltages above or below a given input voltage and is particularly suitable for portable applications powered by a single-cell Li-ion battery.

The LM3269 operates at a 2.4-MHz typical switching frequency in full synchronous operation and provides seamless transitions between buck and boost operating regimes. The LM3269 operates in energy-saving Pulse Frequency Modulation (PFM) mode for increased efficiencies and current savings during low-power RF transmission modes.

The power converter topology needs only one inductor and two capacitors. A unique internal power switch topology enables high overall efficiency.

The LM3269 is internally compensated for buck and boost modes of operation, thus providing an optimal transient response.

When considering using the LM3269 in a system design, please review the layout instructions at the end of this document.

The LM3269 is buck-boost DC-DC converter designed to generate output voltages above or below a given input voltage and is particularly suitable for portable applications powered by a single-cell Li-ion battery.

The LM3269 operates at a 2.4-MHz typical switching frequency in full synchronous operation and provides seamless transitions between buck and boost operating regimes. The LM3269 operates in energy-saving Pulse Frequency Modulation (PFM) mode for increased efficiencies and current savings during low-power RF transmission modes.

The power converter topology needs only one inductor and two capacitors. A unique internal power switch topology enables high overall efficiency.

The LM3269 is internally compensated for buck and boost modes of operation, thus providing an optimal transient response.

When considering using the LM3269 in a system design, please review the layout instructions at the end of this document.
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類型 標題 日期
* Data sheet LM3269 Seamless-Transition Buck-Boost Converter for 3G and 4G RF Power Amplifiers datasheet (Rev. D) PDF | HTML 2015年 4月 14日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note HS Load/Line Transient Jigs and App Rpt for Testing POL Regulators 2013年 4月 30日
User guide LM3269 Evaluation Board 2013年 2月 28日

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