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BD9DA00MF

Datasheet

TSZ02201-0J2J0AB01940-1-2

18.Mar.2025 Rev.001

www.rohm.com

TSZ22111 • 15 • 001

Pin Configuration

(TOP VIEW)

PGD

AGND

BST

ILIM

MODE

SS/REF

RGND

VCC

PGND

Pin Descriptions

Pin No.

Pin Name

Function

BST

Pin for bootstrap. Connect a bootstrap capacitor of 0.1 µF (Typ) between the BST pin and the

SW pin. The voltage of this capacitor is the gate drive of the High-Side FET.

AGND

Ground pin for the control circuit.

ILIM

Current limit value setting pin. For the setting method, refer to Selection of Components Externally

Connected 7. OCP Setting Resister.

MODE

Switching control mode setting pin. For the setting method, refer to Function Explanations 1.

Basic Operation (11) Control Mode Selectable Function

SS/REF

Soft start time setting pin and Reference voltage setting pin.

RGND

Remote sense ground pin. It is also used as a ground for the internal reference voltage. If the

remote sense function is not used, connect this pin to AGND.

Output voltage feedback pin. For the setting method, refer to Selection of Components Externally

Connected 3. Output Voltage Setting.

Enable pin. The device starts up with setting VEN to 1.22 V (Typ) or more. The device enters the

shutdown mode with setting VEN to 1.02 V (Typ) or less. This pin must not be left open.

PGD

Power Good pin. This pin is an open drain output that requires a pull-up resistor. If not used, this

pin can be left floating or connected to the ground.

10, 14

VIN

Power supply pins.

PGND

Ground pins for the output stage of the switching regulator.

VCC

3.0 V (Typ) output power supply pin for the internal circuit. Connect a ceramic capacitor of 1.0 µF

(Typ). Do not connect to any external loads except the MODE pin and a pull-up resistor for the

PGD pin. It is also possible to apply voltage externally to this pin.

Switch pin. This pin is connected to the source of the High-Side FET and the drain of the Low-

Side FET. Connect a 0.1 µF bootstrap capacitor between this pin and the BST pin. Additionally,

please connect an output LC filter to this pin. For the output LC filter setting method, refer to

Selection of Components Externally Connected 2. Output LC Filter.

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