| Part number | SQ28003ADQD |
|---|---|
| Channel(#) | |
| Vin (min) (V) | 2.5 |
| Vin (max) (V) | 5.5 |
| Switching frequency (min)(kHz) | 2.2 |
| Switching frequency (max)(kHz) | |
| Vout (min) (V) | 0.6 |
| Vout (max) (V) | |
| Iout (max) (A) | 3 |
| Vout2 (min)(V) | |
| Vout2 (max )(V) | |
| Iout2 (max)(A) | |
| Vref accuracy (±%) | ±1% |
| Vout accuracy(±%) | |
| Control mode | |
| Duty cycle (max)(%) | |
| Operation mode | |
| Iq (typ) (uA) | 21 |
| Features | PFM, Hic-cup SCP |
| Package | DFN1.5×1.5-6 |
| Operating temperature range(°C) | -40°C to 125°C |
| Functional safety category |
· Low RDS(ON) for Internal MOSFETs: 38mΩ Top, 30mΩ Bottom
· Wide Input Voltage Range: 2.5V ~ 5.5V
· Up to 3A Output Current
· ±1% 0.6V Reference
· PFM Light Load Operation for High Efficiency
· Internal Soft-Start Limits the Inrush Current
· 2.2MHz Switching Frequency Minimizes the External Components
· Advanced Constant On-time and Ripple-Based Control to Achieve Fast Transient Responses
· 100% Dropout Operation
· Power Good Indicator
· Output Auto Discharge Function
· Cycle-by-Cycle Peak Current Limit Protection
· Hic-Cup Mode Output Under Voltage Protection
· Auto-Recovery Mode Over Temperature Protection
· Input Under Voltage Lockout (UVLO)
· RoHS-Compliant and Halogen-Free
· Compact Package: DFN1.5´1.5-6
· MSL Rating: MSL1
The SQ28003A high efficiency 2.2MHz synchronous buck converter operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 3A. It integrates a top MOSFET and a bottom MOSFET with very low RDS(ON) to minimize conduction loss. The 2.2MHz pseudo-constant switching frequency enables using small external inductor and capacitor values.
| Title | Date |
|---|---|
| Silergy_Catalog_Q3_2026 | 2026-11-04 |
