| Part number | SY80091MART |
|---|---|
| Channel(#) | 1 |
| Vin (min) (V) | 2.5 |
| Vin (max) (V) | 5.5 |
| Switching frequency (min)(kHz) | |
| Switching frequency (max)(kHz) | 1500 |
| Vout (min) (V) | 0.6 |
| Vout (max) (V) | 5.5 |
| Iout (max) (A) | 1 |
| Vout2 (min)(V) | |
| Vout2 (max )(V) | |
| Iout2 (max)(A) | |
| Vref accuracy (±%) | ±1.5% |
| Vout accuracy(±%) | |
| Control mode | COT OFF+lpeak |
| Duty cycle (max)(%) | |
| Operation mode | PFM |
| Iq (typ) (uA) | 55 |
| Features | Auto recovery Protection, Output Auto Discharge |
| Package | SOT563 |
| Operating temperature range(°C) | -40°C to 125°C |
| Functional safety category |
· Low RDS(ON) for Internal MOSFETs: 170mΩ Top, 100mΩ Bottom
· Wide Input Voltage Range: 2.5V ~ 5.5V
· Up to 1A Output Current
· ±1.5% 0.6V Reference
· PFM Light Load Operation
· Internal Soft-Start Limits the Inrush Current
· 1.5MHz Switching Frequency Minimizes the External Components
· Constant Off-time and Peak Current Mode Control to Achieve Fast Transient Responses
· 100% Dropout Operation
· Output Auto Discharge Function
· Power Good Indicator for SY80091
· 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: SOT563
· Moisture Sensitivity Level (MSL): 1
The SY80091x high efficiency 1.5MHz synchronous buck converter operates over a wide input voltage range of 2.5V to 5.5V, and can deliver an output current up to 1A. It integrates a top MOSFET and a bottom MOSFET with very low RDS(ON) to minimize conduction loss. The 1.5MHz pseudo-constant switching frequency enables using small external inductor and capacitor values.
Photo of evaluation board
Photo of evaluation board
DB_SY80091MART_1 is intended for evaluating 1.5 MHz, 1A synchronous Buck regulator. It features enable control.
| Title | Date |
|---|---|
| Automotive_Solutions_Q2_2026 | 2026-06-12 |
| Silergy_Catalog_Q2_2026 | 2026-06-12 |
| SOT563 | 2021-09-27 |
