LM3203 - 具有旁通模式的微型、可调节、降压 DC-DC 转换器，用于射频功率放大器

LM3203是TI德州仪器公司的一款转换器（集成开关）产品，LM3203是具有旁通模式的微型、可调节、降压 DC-DC 转换器，用于射频功率放大器，本站介绍了LM3203的封装应用图解、特点和优点、功能等，并给出了与LM3203相关的TI元器件型号供参考。

LM3203 - 具有旁通模式的微型、可调节、降压 DC-DC 转换器，用于射频功率放大器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM3203 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell. However, they may be used in many other applications. It steps down an input voltage of 2.7V to 5.5V to an adjustable output voltage of 0.8V to 3.6V. The output voltage is set using a VCON analog input and external resistor dividers for optimizing efficiency of the RF PA at various power levels.

The LM3203 offers 3 modes for mobile phones and similar RF PA applications. Fixed-frequency PWM mode minimizes RF interference. Bypass mode turns on an internal bypass switch to power the PA directly from the battery. Shutdown mode turns the device off and reduces battery consumption to 0.1µA (typ.).

The LM3203 is available in a 10-pin lead free DSBGA package. A high switching frequency (2MHz) allows use of tiny surface-mount components.

产品特性

2MHz (Typ.) PWM Switching Frequency
Operates from a Single Li-Ion Cell (2.7V to 5.5V)
Adjustable Output Voltage (0.8V to 3.6V)
500mA Maximum Load Capability (PWM and Bypass Mode)
PWM / Forced Bypass Mode
Low RDSON Bypass FET: 85m? (Typ.)
High Efficiency (96% typ. at 3.6VIN, 3.2VOUT at 150mA)
Fast Turn-On Time When Enabled (50µs typ.), 3GPP Compliant
10-Pin DSBGA Package
Current Overload Protection
Thermal Overload Protection

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