LM3269是TI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，本页介绍了LM3269的产品说明、应用、特性等，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 - TI公司（Texas Instruments，德州仪器）
- 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
- Power Supply for 3G/4G Power Amplifiers
- Cellular Phones
- Portable Hard Disk Drives
- PDAs
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.
| PART NUMBER | PACKAGE | BODY SIZE (MAX) |
|---|---|---|
| LM3269 | DSBGA (12) | 2.529 mm x 2.022 mm |
