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BD9DA00MF

Datasheet

TSZ02201-0J2J0AB01940-1-2

© 2025 ROHM Co., Ltd. All rights reserved.

18.Mar.2025 Rev.001

www.rohm.com

TSZ22111 • 15 • 001

Contents

General Description ........................................................................................................................................................................1

Features..........................................................................................................................................................................................1

Applications ....................................................................................................................................................................................1

Key Specifications ..........................................................................................................................................................................1

Package..........................................................................................................................................................................................1

Typical Application Circuit ...............................................................................................................................................................1

Contents .........................................................................................................................................................................................2

Pin Configuration ............................................................................................................................................................................3

Pin Descriptions..............................................................................................................................................................................3

Block Diagram ................................................................................................................................................................................4

Description of Blocks ......................................................................................................................................................................5

Absolute Maximum Ratings ............................................................................................................................................................7

Thermal Resistance........................................................................................................................................................................7

Recommended Operating Conditions.............................................................................................................................................8

Electrical Characteristics.................................................................................................................................................................8

Typical Performance Curves.........................................................................................................................................................10

Function Explanations ..................................................................................................................................................................20

1. Basic Operation.....................................................................................................................................................................20

(1) DC/DC Converter Operation ............................................................................................................................................20

(2) Enable Control .................................................................................................................................................................20

(3) Soft Start ..........................................................................................................................................................................21

(4) Power Good .....................................................................................................................................................................22

(5) Output Voltage Tracking Function ....................................................................................................................................22

(6) Output Voltage Clamp Function (OVC) ............................................................................................................................22

(7) QuiCurTM ..........................................................................................................................................................................22

(8) Nano Pulse ControlTM.......................................................................................................................................................22

(9) Bootstrap Capacitor Charge Function ..............................................................................................................................22

(10) Output Discharge Function.............................................................................................................................................22

(11) Control Mode Selectable Function..................................................................................................................................23

(12) External Bias On VCC Pin Function...............................................................................................................................23

(13) Remote Sense Function.................................................................................................................................................23

2. Protection..............................................................................................................................................................................24

(1) Over Current Protection (OCP) / Short Circuit Protection (SCP)......................................................................................24

(2) Low-Side Reverse Over Current Protection (ROCP)........................................................................................................25

(3) Under Voltage Lockout Protection (UVLO).......................................................................................................................25

(4) Thermal Shutdown Protection (TSD)................................................................................................................................25

(5) Over Voltage Protection (OVP) ........................................................................................................................................25

Selection of Components Externally Connected...........................................................................................................................26

1. Input Capacitor......................................................................................................................................................................26

2. Output LC Filter.....................................................................................................................................................................26

3. Output Voltage Setting ..........................................................................................................................................................28

4. Soft Start Capacitor (Soft Start Time Setting)........................................................................................................................29

5. VCC Capacitor ......................................................................................................................................................................30

6. Bootstrap Capacitor...............................................................................................................................................................30

7. OCP Setting Resistor ............................................................................................................................................................30

8. EN Pull up Resistor ...............................................................................................................................................................30

Application Characteristic Data.....................................................................................................................................................31

PCB Layout Design ......................................................................................................................................................................43

I/O Equivalence Circuits................................................................................................................................................................45

Operational Notes.........................................................................................................................................................................46

Ordering Information.....................................................................................................................................................................48

Marking Diagram ..........................................................................................................................................................................48

Physical Dimension and Packing Information...............................................................................................................................49

Revision History............................................................................................................................................................................50