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ZSPM4523 - Application Circuit
ZSPM4523 - Block Diagram
ZSPM4523 - Pinout


High-Efficiency Solar PV MPPT Regulator for Super Capacitor Systems

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 Specification

FunctionAdvanced FeaturesOutput Current Max (A)Input Voltage Range (V)
Super Capacitor Charger1.53.20 - 7.20

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. RangeCarrier TypeSample & Buy
ZSPM4523AA1RActiveNBG16VFQFPN16-40 to 125°CReelCheck Availability
ZSPM4523AA1WActiveNBG16VFQFPN16-40 to 125°CReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
ZSPM4523 Datasheet Datasheet PDF 335 KB Jan 29, 2016
ZSPM4523 Short-form Datasheet Short Form Datasheet PDF 44 KB Jan 29, 2016
User Guides & Manuals
ZSPM4523 Evaluation Kit Description Manual PDF 715 KB Apr 21, 2016
Apps Notes & White Papers
ZSPM4521 / ZSPM4523 Application Note - Charging Solutions for Li-ion Batteries or Super Capacitors using Photovoltaic Sources Application Note PDF 113 KB Apr 21, 2016
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 19, 2016

Software & Tools

Title Type Format File Size Datesort icon
ZSPM45XX Evaluation Kit Software Setup V1.020 (zip) Software ZIP 935 KB Apr 8, 2016

Evaluation Boards