[AP3603]
015000004-J-02 2015/07
- 2 -
3. 目 次
1. 概 要 ............................................................................................................................................................... 1
2. 特 長 ............................................................................................................................................................... 1
3. 目 次 ............................................................................................................................................................... 2
4. ブロック図 ....................................................................................................................................................... 3
5. オーダリングガイド ....................................................................................................................................... 3
6. ピン配置と機能説明 ....................................................................................................................................... 4
■ ピン配置 ..................................................................................................................................................... 4
■ 機能説明 ..................................................................................................................................................... 5
7. 絶対最大定格 ................................................................................................................................................... 6
8. 推奨動作条件 ................................................................................................................................................... 6
9. 電気的特性 ....................................................................................................................................................... 7
10. 機能説明 ........................................................................................................................................................... 8
10.1 基本動作 ............................................................................................................................................... 8
10.2 シャットダウン ................................................................................................................................... 8
10.3 パワーオンシーケンス ....................................................................................................................... 8
10.4 ソフトスタート ................................................................................................................................... 8
10.5 パワーダウンシーケンス ................................................................................................................... 8
10.6 過電圧保護動作 ................................................................................................................................... 8
10.7 過電流保護動作(PWM動作時) ...................................................................................................... 8
10.8 エラーアンプ出力CC端子電圧クランプ機能 .................................................................................. 9
10.9 外部同期機能 ....................................................................................................................................... 9
11 タイミングチャート ..................................................................................................................................... 10
12 アプリケーション情報 ................................................................................................................................. 11
12.1 出力電圧設定 ..................................................................................................................................... 11
12.2 駆動周波数設定 ................................................................................................................................. 11
12.3 最大オンデューティ設定 ................................................................................................................. 11
12.4 最大出力電圧 ..................................................................................................................................... 11
13 基板レイアウトの注意事項 ......................................................................................................................... 12
■ 推奨レイアウト ....................................................................................................................................... 12
■ GND配線 .................................................................................................................................................. 12
■ スイッチングノード配線 ....................................................................................................................... 12
■ カレントセンス抵抗配置配線 ......................................................................................................... 12
■ フィードバック端子配線 ....................................................................................................................... 12
■ V8、V4、SS端子用コンデンサ ............................................................................................................. 12
■ バイパスコンデンサ ............................................................................................................................... 12
14 特性例 ............................................................................................................................................................. 13
15 外部接続回路例 ............................................................................................................................................. 14
■ 標準動作回路 デュアル出力 ........................................................................................................... 14
■ 外部接続回路推奨部品 ..................................................................................................................... 14
■ 標準動作回路 デュアルフェーズ ................................................................................................... 15
■ 外部接続回路推奨部品 ..................................................................................................................... 15
16 パッケージ ..................................................................................................................................................... 16
■ 外形寸法図 ............................................................................................................................................... 16
■ マーキング ............................................................................................................................................... 16
17 改訂履歴 ......................................................................................................................................................... 17
重要な注意事項 ..................................................................................................................................................... 18