LM3262 - 用于 RF PA 的降压 DCDC 转换器

LM3262是TI德州仪器公司的一款转换器（集成开关）产品，LM3262是用于 RF PA 的降压 DCDC 转换器，本站介绍了LM3262的封装应用图解、特点和优点、功能等，并给出了与LM3262相关的TI元器件型号供参考。

LM3262 - 用于 RF PA 的降压 DCDC 转换器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3262 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell; however, it may be used in many other applications such as USB-powered portable applications. The device’s 2.5V to 5.5V input voltage can be stepped down to an adjustable output voltage range from 0.4V to 3.6V. Output voltage is set using a VCON analog input which enables improved RF stage PA efficiencies.

The LM3262 offers five modes of operation. In Pulse Width Modulation (PWM) mode the device operates at a fixed frequency of 6 MHz (typ.) which minimizes RF interference at medium-to-low loads. At light load, the device enters into ECO mode automatically and operates with reduced switching frequency. In ECO mode, the quiescent current is reduced and extends the battery life. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typ.). At low-battery condition Bypass mode reduces the voltage dropout to less than 50 mV (typ.). The part also features a Sleep mode.

The LM3262 is available in a 9-bump lead-free DSBGA package. A high switching frequency (6 MHz) allows use of only three tiny surface-mount components: one inductor and two ceramic capacitors.

产品特性

6MHz (typ.) PWM Switching Frequency
Operates from a Single Li-Ion Cell (2.5V to 5.5V)
Adjustable Output Voltage (0.4V to 3.6V)
800 mA Maximum Load Capability (up to 1A in Bypass)
High Efficiency (93% typ. at 3.8VIN, 3.4VOUT at 500 mA)
Automatic ECO/PWM/BP Mode Change
9-bump DSBGA Package
Current and Thermal Overload Protection
Multi-function VCON Pin (eliminates need for separate BPEN control)
Soft-Start Function
Small Chip Inductor in 0805 (2012) case size
25 µA typical Iq in Sleep Mode
5 µs typical rise/fall time for 2V step

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