| Part number | SQ28903BAT |
|---|---|
| Channel(#) | 1 |
| Vin (min) (V) | 2.8 |
| Vin (max) (V) | 6 |
| Switching frequency (min)(kHz) | 2200 |
| Switching frequency (max)(kHz) | 2200 |
| Vout (min) (V) | 0.6 |
| Vout (max) (V) | 6 |
| Iout (max) (A) | 3 |
| Vout2 (min)(V) | |
| Vout2 (max )(V) | |
| Iout2 (max)(A) | |
| Vref accuracy (±%) | 1% |
| Vout accuracy(±%) | |
| Control mode | Peak current control |
| Duty cycle (max)(%) | 100 |
| Operation mode | PFM/FCCM |
| Iq (typ) (uA) | 35 |
| Features | Enable, Power good, Auto-discharge, Fixed soft-start, Low Iq, UVP with hiccup, 100% duty cycle, Low ISD, Spread spectrum, Cycle by cycle overcurrent protection, Forced PWM, Pre-bias startup |
| Package | SOT583 |
| Operating temperature range(°C) | -40 to 125 |
| Functional safety category |
The SQ28903 is a high-efficiency 2.2MHz synchronous step-down converter that operates over an input voltage range of 2.8V to 6V, and can deliver an output current of up to 3A. It integrates very low RDS(ON) main and synchronous MOSFETs to minimize conduction loss. The 2.2MHz constant switching frequency reduces the required external inductor and capacitor values.
The SQ28903 utilizes a constant frequency peak current mode control architecture to achieve stable operation across a wide range of conditions. It also provides cycle-by-cycle current limit protection, output short-circuit protection, and overtemperature protection.
The SQ28903 is available in a space-saving, SOT583 package.
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
The EVB_SQ28903BAT is intended for evaluating 6V/3A 2.2MHz synchronous step-down regulator.
| Title | Date |
|---|---|
| Automotive_Solutions_Q2_2026 | 2026-06-12 |
| Silergy_Catalog_Q2_2026 | 2026-06-12 |
