| Part number | SA33103QCQ |
|---|---|
| Channel(#) | 1 |
| Vin (min) (V) | 4 |
| Vin (max) (V) | 60 |
| Topology | Buck |
| Switching frequency (min)(kHz) | 200 |
| Switching frequency (max)(kHz) | 1000 |
| Vout (min) (V) | 0.7 |
| Vout2 (min)(V) | |
| Vout (max) (V) | 15 |
| Vout2 (max )(V) | |
| Vref accuracy (±%) | 2 |
| Vout accuracy(±%) | |
| Control mode | Current mode fix frequency |
| Duty cycle (max)(%) | 94 |
| Operation mode | PFM/FCCM |
| Iq (typ) (uA) | 8 |
| Features | Suport PLL/PFM/FCCM,Controller |
| Package | QFN4×4-24 |
| Operating temperature range(°C) | -40 to 125 |
| Functional safety category |
The SA33103 is a synchronous step-down controller capable of generating output voltages from 0.7V to 15V by driving external high and low side NMOS transistors. The user can adjust the switching frequency from 200kHz to 1.0MHz via an external resistor, and synchronization with an external clock is supported. The device offers three operating modes: PWM, PLL PWM, and PFM, selectable via the MODE pin. The automatic PFM mode enhances efficiency under light load conditions.
The SA33103 includes protection functions such as cycle-by-cycle current limit, Under Voltage Detection (UVD), Over Voltage Detection (OVD), Over Voltage Protection (OVP), Short Circuit Protection (SCP), and thermal shutdown. Additionally, the PGOOD (Power Good) pin indicates the output status. The CLKOUT pin of the SA33103 features a 180° phase shift function to support multiphase applications. For EMI reduction, a spread-spectrum clock generator is available to diffuse the oscillation frequency during PWM operation.
The SA33103 is available in a QFN4×4-24 package.
| Title | Date |
|---|---|
| DS_SA33103 Datasheet | 2026-03-20 |
| EVB_SA33103QCQ EVB User Guide | 2026-03-20 |
| Automotive_Solutions_Q2_2026 | 2026-06-12 |
