LM3242
- 2.7-V to 5.5-V Input Voltage Operating From
Single Li-Ion Cell - 6-MHz (typical) PWM Switching Frequency
- 0.4-V to 3.6-V Adjustable Output Voltage
- 750-mA Maximum Load Capability
(up to 1 A in Bypass) - High Efficiency (95% typical at 3.9 VIN,
3.3 VOUT at 500 mA) - Automatic ECO/PWM/BP Mode Change
- Current Overload Protection
- Thermal Overload Protection
- Soft-Start Function
- Small Chip Inductor in 0805 (2012) case size
The LM3242 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. It steps down an input voltage from 2.7 V to 5.5 V to an adjustable output voltage from 0.4 V to 3.6 V. Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA.
The LM3242 offers five modes of operation. In PWM mode the device operates at a fixed frequency of 6 MHz (typical) which minimizes RF interference when driving medium-to-heavy 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 (typical). In low-battery condition Bypass mode reduces the voltage dropout to less than 50 mV (typical). The part also features a Sleep mode.
The LM3242 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.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | LM3242 6-MHz, 750-mA Miniature Adjustable Step-Down DC-DC Converter With Auto Bypass for RF Power Amplifiers データシート (Rev. E) | PDF | HTML | 2015/08/27 | ||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| EVM ユーザー ガイド (英語) | LM3242 DSBGA Evaluation Board (Rev. AY) | 2013/04/30 | ||||
| 製品概要 | LM3242 Dynamic Output Voltage DC/DC Converter for 3G/4G RF Power Amplifiers | 2012/01/30 |
設計と開発
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LM3242TM-EV — LM3242 6MHz、750mA、小型、可変、降圧 DC/DC 評価モジュール
The LM3242 is a DC-DC converter optimized for powering multi-mode 3G/4G RF power amplifiers (PAs) from a single Lithium-Ion cell. The LM3242 steps down an input voltage from 2.7V to 5.5V to a dynamically adjustable output voltage of 0.4V to 3.6V. The output voltage is set through a VCON analog (...)
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| DSBGA (YFQ) | 9 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。