JAJSG28F
august 2018 – august 2020
TPS2120
,
TPS2121
PRODUCTION DATA
1
1
特長
2
アプリケーション
3
概要
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
8
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Parameter Measurement Information
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Input Settling Time and Output Soft Start Control (SS)
9.3.1.1
Slew Rate vs. CSS Capacitor
9.3.2
Active Current Limiting (ILM)
9.3.3
Short-Circuit Protection
9.3.4
Thermal Protection (TSD)
9.3.5
Overvoltage Protection (OVx)
9.3.6
Fast Reverse Current Blocking (RCB)
9.3.7
Output Voltage Dip and Fast Switchover Control (TPS2121 only)
9.3.8
Input Voltage Comparator (VCOMP)
9.4
TPS2120 Device Functional Modes
9.5
TPS2121 Device Functional Modes
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Manual Switchover Schematic
10.2.2
Design Requirements
10.2.3
Detailed Design Description
10.2.4
Design Procedure
10.2.4.1
Selecting PR1 and CP2 Resistors
10.2.4.2
Selecting OVx Resistors
10.2.4.3
Selecting Soft-Start Capacitor and Current Limit Resistors
10.2.5
Application Curves
10.3
Automatic Switchover with Priority (XCOMP)
10.3.1
Application Schematic
10.3.2
Design Requirements
10.3.3
Detailed Design Description
10.3.4
Design Procedure
10.3.4.1
Selecting PR1 and CP2 Resistors
10.3.5
Application Curves
10.4
Automatic Seamless Switchover with Priority (XREF)
10.4.1
Application Schematic
10.4.2
Design Requirements
10.4.3
Detailed Design Description
10.4.4
Application Curves
10.5
Highest Voltage Operation (VCOMP)
10.5.1
Application Schematic
10.5.2
Design Requirements
10.5.3
Detailed Design Description
10.5.4
Detailed Design Procedure
10.5.5
Application Curves
10.6
Reverse Polarity Protection with TPS212x
10.7
Hotplugging with TPS212x
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Documentation Support
13.1.1
Related Links
13.2
ドキュメントの更新通知を受け取る方法
13.3
サポート・リソース
13.4
Trademarks
13.5
静電気放電に関する注意事項
13.6
用語集
14
Mechanical, Packaging, and Orderable Information
1
特長
広い動作範囲:2.8V~22V
絶対最大定格入力電圧:24V
低い RON 抵抗
TPS2120:62mΩ (標準値)
TPS2121:56mΩ (標準値)
可変過電圧スーパーバイザ (OVx)
精度 ±5% 未満
可変優先スーパーバイザ (PR1)
精度 ±5% 未満
TPS2121 は精度 1% 未満の外部基準電圧 (CP2) をサポート
出力電流制限 (ILM)
TPS2120:1A~3A
TPS2121:1A~4.5A
チャネル状態表示 (ST)
可変入力セトリング時間 (SS)
可変出力ソフトスタート時間 (SS)
TPS2121 高速出力切り替え (t
SW
):5µs (標準値)
低静止電流 (Iq) (有効な入力から):200μA (標準値)
低静止電流 (Iq) (無効な入力から):10µA (標準値)
手動による入力電源選択 (OVx)
過熱保護 (OTP)