LM3203
- 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: 85mΩ (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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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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM3203 Step-Dwn DC-DC Converter w/Bypass Mode for CDMA/WCDMA RF Pwr Amp datasheet (Rev. D) | 2013年 4月 2日 | |
| EVM User's guide | AN-1390 LM3203 Evaluation Board (Rev. B) | 2013年 4月 30日 | ||
| Application note | Optimizing RF Power Amplifier System Efficiency Using DC-DC Converters | 2007年 3月 21日 |
設計與開發
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| 封裝 | 引腳 | 下載 |
|---|---|---|
| DSBGA (YPA) | 10 | 檢視選項 |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 資格摘要
- 進行中可靠性監測
- 晶圓廠位置
- 組裝地點