The ZSPM4523 is a DC/DC synchronous switching super capacitor charger with fully integrated power switches, internal compensation, and full fault protection. It uses a temperature-independent photovoltaic maximum power point tracking (MPPT) calculator to optimize power output from the source during Full-Charge Mode. Its 1MHz switching frequency allows using small filter components, which results in smaller board space and reduced bill-of-material costs. In Full-Charge Mode, the duty cycle is controlled by the MPPT function. Once the termination voltage is reached, the regulator operates in Constant Voltage Mode. When the regulator is disabled (the EN pin is low), the device draws 10µA (typical) quiescent current from VOUT. The ZSPM4523 integrates a wide range of protection circuitry, including input supply under-voltage lockout, output over-voltage protection, current limiting, and thermal shutdown. The ZSPM4523 includes supervisory reporting via the NFLT (Inverted Fault) open-drain output to interface other components in the system. Device programming is achieved by the I²C interface through the SCL and SDA pins.


  • Temperature-independent MPPT regulation
  • VOUT reverse-current blocking
  • Programmable temperature-compensated termination voltage: 2.48 to 2.74 V ± 1%
  • User programmable maximum charge current: 50mA to 1500mA
  • Input supply under-voltage lockout
  • Full protection for VOUT over-voltage
  • I2C program interface with EEPROM registers
  • Charge status indication

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Range Carrier Type Package Buy Sample
ZSPM4523AA1R Not Recommended for New Designs VFQFPN 16 -40 to 125°C Reel Package Info
ZSPM4523AA1W Not Recommended for New Designs VFQFPN 16 -40 to 125°C Reel Package Info

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZSPM4523 Short-form Datasheet Short Form Datasheet PDF 155 KB
ZSPM4523 Datasheet Datasheet PDF 405 KB
User Guides & Manuals
IDT CAD Altium Libraries for AID Products Rev 20160819 Guide ZIP 1.20 MB
ZSPM4523 Evaluation Kit Description Manual PDF 881 KB
Application Notes & White Papers
ZSPM4521 / ZSPM4523 Application Note - Charging Solutions for Li-ion Batteries or Super Capacitors using Photovoltaic Sources Application Note PDF 239 KB
ZSPM45XX Evaluation Kit Software Setup V1.020 (zip) Software ZIP 935 KB

Boards & Kits

Part Number Title Type Company
ZSPM4523KIT Evaluation Kit for ZSPM4523