Active Semi

Demoboard ACT88325EVK1-101 User’s Guide

Advanced PMU with 3 Bucks, 2 LDOs and Load Bypass Switch

Topologie: Buck
Eingangsspannung (min.): 2.70 V
Eingangsspannung (max.): 5.50 V
Schaltfrequenz (min.): 1.12 kHz
Schaltfrequenz (max.): 2.25 kHz
Ausgang 1: 0.90 V / 3.000 A
Ausgang 2: 3.30 V / 4.000 A
Ausgang 3: 1.80 V / 2.000 A

Erstveröffentlichung am 20.06.2018, Version 1.0


This document describes the characteristic and operation of the Active Semi ACT88325EVK1-101 evaluation kit (EVK).It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK demonstrates the ACT88325VA101ActivePMU power management IC. Other ACT88325VAxxx options can beevaluated on this EVK by replacing the IC and any other necessary components.The EVK can be used as a standalone board if desired. However, to access the internal registers and to take full advantage of the IC’s capability, the user must connect the EVK kit to a PC with Active Semi’s USB-TO-I2C interface dongle and use the GUI software. The EVK provides full access to the each converter’s input and output voltage, as well as all the digital control signals. This gives the user the flexibility to configure the EVK to match their real world system.Note that the ACT88325EVK1-101 is specifically configured for the ACT88325VA101. This CMI option is configured to power the Silicon Motion 2263 and SM2263XT processors with a 3.3V input.


  • Wide input voltage range
  • Vin = 2.7V to 5.5V
  • Complete integrated power solution
  • One 4A DC/DC Step-Down with BypassMode
  • Two 3A DC/DC Step-Down Regulators
  • Two 300mA LDOs
  • High Power Load Switch Gate Driver withSlew Rate Control Space Savings
  • Fully integrated
  • High Fsw = 2.25MHz or 1.125MHz
  • Integrated sequencing
  • Easy system level design
  • Configurable sequencing
  • Seamless sequencing with external supplies
  • Programmable Reset and Power GoodGPIO’s
  • Buck 1 Bypass Mode for 3.3V system levelcompliance
  • Highly configurable
  • μP interface for status reporting and controllability
  • Flexible Sequencing Options
  • I2C Interface – 1MHz
  • Multiple Sleep Modes
  • See ACT88326 for Pushbutton Startup


  Artikel Nr. SPEC Produktserie Pins Reihen Gender Typ IR 1
Verpackung Anwendung PCB/Kabel/Panel Modularity Wire Section L
RDC typ.
RDC max.
Montageart Muster
61300211121 PDF WR-PHD 2.54 mm THT Pin Header 2 Single Pin Header Gerade 3 Beutel
61300311121 PDF WR-PHD 2.54 mm THT Pin Header 3 Single Pin Header Gerade 3 Beutel
61300411121 PDF WR-PHD 2.54 mm THT Pin Header 4 Single Pin Header Gerade 3 Beutel
691214110002 PDF WR-TBL Series 2141 - 3.50 mm Horiz. Entry Modular 2 Horizontal Rising Cage Clamp PCB Ja 24 to 16 (AWG) 0.205 to 1.31 (mm²)
74438356010 PDF WE-MAPI SMT-Speicherdrossel 1 7.2 9 12 15 55 SMT
74438323010 PDF WE-MAPI SMT-Speicherdrossel 1 2.5 4 63 75 80 SMT