The ZSPM4023-09 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The ZSPM4023-09 operates over a 4.5V to 28V supply range (24V typical). It has an internal linear regulator that provides a regulated 5V to power the internal control circuitry. The ZSPM4023-09 operates at a constant 600kHz (typical) switching frequency in continuous-conduction mode and can be used to provide up to 9A of output current. The output voltage is adjustable from 5.5V down to 0.8V. Under medium to heavy loads, the ZSPM4023-09 provides high efficiency and ultra-fast transient response via its rapid-control architecture. Under light load conditions, it maintains high efficiency and a superior transient response by transitioning to variable-frequency, discontinuous mode operation with its ultra-light-load architecture. The ZSPM4023-09 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under-voltage lockout to ensure proper operation under power-sag conditions; thermal shutdown; internal soft-start to reduce inrush current; foldback current limiting; and "hiccup" mode short-circuit protection. The ZSPM4023-09 includes a power good (PG) output to allow simple sequencing.


  • Rapid-control architecture enables operation with a high input/output voltage ratio (e.g., VIN = 28V and VOUT = 0.8V) and small output capacitance
  • Adjustable output voltage from 0.8V to 5.5V
  • Universally compatible with most output capacitors – stable with zero to high ESR
  • Power good (PG) output
  • Foldback current limiting and "hiccup" mode short-circuit protection
  • Safe start-up into pre-biased loads
  • Ultra-light load efficiency – up to 80% at 10mA
  • Up to 95% efficiency
  • Feedback reference accuracy as high as ±1%

tuneProduct Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Range Carrier Type Buy Sample
Obsolete VFQFPN 28 -40 to -40°C Reel


Title language Type Format File Size Date
Datasheets & Errata
star ZSPM4023-09 Datasheet Datasheet PDF 1.04 MB
ZSPM4023-ZSPM4022 Feature Sheet Datasheet - Short-form PDF 522 KB
ZSPM4023-09 Short-form Datasheet Datasheet - Short-form PDF 217 KB
User Guides & Manuals
IDT CAD Altium Libraries for AID Products Rev 20160819 Guide ZIP 1.20 MB
ZSPM4022/ZSPM4023 Evaluation Kit Description Manual - Development Tools PDF 714 KB
ZSPM4022-23 Application Note - Circuit Layout and Component Selection Manual - Development Tools PDF 961 KB

memoryBoards & Kits

Part Number Title Type Company
ZSPM4023-09-KIT Evaluation Kit for ZSPM4023-09 Evaluation Renesas