製品概要
概要
The L6902D is a complete and simple step down switching regulator with adjustable current limit. Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control.By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5%). Moreover constant current control can be used to charge NiMH and NiCd batteries.
The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor).
The internal robust P-channel DMOS transistor with a typical of 250 mΩ assures high efficiency and a minimum dropout even at high output current level. The internal limiting current (latched function) of typical value of 2.5 A protects the device from accidental output short circuit avoiding dangerous loads damage.
If the temperature of the chip goes higher than a fixed internal threshold (150°C with 20°C hysteresis), the power stage is turned off.
Other protections beside thermal shutdown complete the device for a safe and reliable application: overvoltage protection, frequency folback overcurrent protection and protection vs. feedback disconnection.
The internal fixed switching frequency of 250KHz, and the SO-8 package pin allow to built an ultra compact DC/ DC converter with a minimum board space.
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特徴
- Up to 1 A output current
- Operating input voltage from 8 V to 36 V
- Precise 3.3 V (±2%) reference voltage
- 5 % output current accuracy
- Output voltage adjustable from 1.235 V to 34 V
- 250 kHz internally fixed frequency
- Voltage feedforward
- Zero load current operation
- Adjustable current limit
- Protection against feedback Disconnection
- Thermal shutdown
回路ダイアグラム
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製品スペック (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 19 Sep 2016 | 19 Sep 2016 |
アプリケーションノート (2)
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|---|---|---|---|---|
| 13 Sep 2018 | 13 Sep 2018 | |||
| 13 Sep 2018 | 13 Sep 2018 |
技術ノート & 解説 (1)
| Resource title | Latest update | |||
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| 20 Jan 2020 | 20 Jan 2020 |
パンフレット (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Mar 2020 | 23 Mar 2020 |
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STMicroelectronics - L6902
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品質 & 信頼性
| 製品型番 | Marketing Status | パッケージ | グレード | RoHSコンプライアンスグレード | 材料宣誓書** |
|---|---|---|---|---|---|
| L6902D | 量産中 | SO-8 | インダストリアル | Ecopack2 | |
| L6902D013TR | 量産中 | SO-8 | インダストリアル | Ecopack2 | |
L6902D
Package:
SO-8Material Declaration**:
L6902D013TR
Package:
SO-8Material Declaration**:
(**) st.comで提供している材料宣誓書は、パッケージ･ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください
サンプル & 購入
| 製品型番 | 販売代理店から購入 | STから購入 | 製品ステータス | ECCN (US) | ECCN (EU) | 梱包タイプ | パッケージ | 温度（℃） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小 | 最大 | |||||||||||
| L6902D | 5 distributors | Buy Direct | 量産中 | EAR99 | NEC | Tube | SO-8 | - | - | CHINA | 1.0 / 1k | |
| L6902D013TR | 3 distributors | Buy Direct | 量産中 | EAR99 | NEC | Tape And Reel | SO-8 | - | - | CHINA | 1.0 / 1k | |
（*）概算用の希望小売単価（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。
