LM27213
- Ideal Load and Line Transient Responses
- 5V to 30V Input Range
- On-Chip Gate Drive
- Convenient CLK_EN# Signal
- Input Under-Voltage Lockout
- High Light-Load Efficiency
- Adjustable Analog Soft Start
- Peak Current Limit
- Over-Voltage Protection
- Error Correction for Good Static Accuracy
- ±1% DAC Accuracy Over Temperature
- Interfaces with the LM2647 System Supply
- Available in TSSOP or WQFN Packages
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The LM27213 is a single-phase synchronous buck regulator controller designed to fully support a portable microprocessor. On-chip gate drive makes for a compact, single chip solution. Output currents in excess of 25 Amps are possible.
The IC employs a current mode hysteretic control mechanism. Inductor current is sensed through a low value sense resistor.
The LM27213 will operate over an input voltage range of 5V to 30V. The output voltage is programmed through 6 Voltage Identification (VID) pins and ranges from 0.700V to 1.708V in 64 steps.
Since the error in the output voltage directly sets the inductor current, the dynamic response to a large, fast load transient is close to a square wave. This is optimal for mode transition requirements. Also, due to the intrinsic input voltage feedforward characteristic of hysteretic control, the line transient response is excellent as well.
The IC provides cycle-by-cycle peak current limit, over-voltage protection, and a power good signal. The LM27213 fully supports the Stop CPU and Sleep modes offered by some processors. When enabled, the IC enters a power-saving “diode emulator” mode which helps prolong battery runtime for portable systems.
The LM27213 also has a soft start feature for the external adjustment of soft start speed.
技術資料
| 種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
|---|---|---|---|---|---|---|
| * | データシート | LM27213 Single Phase Hysteretic Buck Controller データシート (Rev. A) | 2013年 3月 28日 | |||
| アプリケーション・ノート | AN-1487 Current Mode Hysteretic Buck Regulators (Rev. B) | 2013年 5月 5日 | ||||
| アプリケーション・ノート | Application Note 1487 Current Mode Hysteretic Buck Regulators (jp) | 2006年 8月 29日 |
設計と開発
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| パッケージ | ピン数 | ダウンロード |
|---|---|---|
| TSSOP (DGG) | 48 | オプションの表示 |
| WQFN (RHS) | 48 | オプションの表示 |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 材質成分
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点