PM8908 datasheet(7/28 Pages) STMICROELECTRONICS

Part #	PM8908

Description	Monolithic buck converter for DDR memory termination

PDF	28 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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PM8908

Pin description and connection diagrams

PHASE

Output inductor connection.

The pins are connected to the embedded MOSFETs (high-side source and

low-side drain). Connect directly to the output inductor. See Figure 1.

BOOT

Bootstrap pin.

It provides power supply for the floating high-side MOS driver.

Connect with 0.1 µF to PHASE. See Figure 1.

Enable.

MODE

Switching frequency and the OCL programming pin. See Table 6 on page 14.

This pin must not be left floating.

PGOOD

Power Good pin.

Open drain output set free after SS has finished and pulled low when VOUT is

out of the PGOOD window or any protection is triggered.

Pull up to VCC, if not used it can be left floating.

VCC

Device power supply.

Operative voltage is 5.0 V. Filter with at least 1

µF MLCC vs. GND.

Thermal pad

The thermal pad of the device. Connect to the PCB ground plane with multiple

VIAS.

Table 2. Pin description (continued)

Function

No.

Name

PM8908 Datasheet(PDF) 7 Page - STMicroelectronics