LM3269 - 用于 LTE 和 HSPA 射频功率放大器的无缝转换降压/升压转换器

LM3269是TI德州仪器公司的一款转换器（集成开关）产品，LM3269是用于 LTE 和 HSPA 射频功率放大器的无缝转换降压/升压转换器，本站介绍了LM3269的封装应用图解、特点和优点、功能等，并给出了与LM3269相关的TI元器件型号供参考。

LM3269 - 用于 LTE 和 HSPA 射频功率放大器的无缝转换降压/升压转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品特性

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

产品应用

Power Supply for 3G/4G Power Amplifiers
Cellular Phones
Portable Hard Disk Drives
PDAs

产品说明

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 instruactions at the end of this document.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (MAX)
LM3269	DSBGA (12)	2.529 mm x 2.022 mm

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