| Part number | SY21253FCC |
|---|---|
| Channel(#) | 1 |
| Vin (min) (V) | 4.5 |
| Vin (max) (V) | 100 |
| Switching frequency (min)(kHz) | 100 |
| Switching frequency (max)(kHz) | 1000 |
| Vout (min) (V) | 0.8 |
| Vout (max) (V) | 36 |
| Iout (max) (A) | 3 |
| Vout2 (min)(V) | |
| Vout2 (max )(V) | |
| Iout2 (max)(A) | |
| Vref accuracy (±%) | 1 |
| Vout accuracy(±%) | |
| Control mode | COT OFF+Ipeak |
| Duty cycle (max)(%) | 80 |
| Operation mode | Auto PFM |
| Iq (typ) (uA) | 100 |
| Features | Asynchronous,Power good |
| Package | SO8E |
| Operating temperature range(°C) | -40 to 125 |
| Functional safety category |
The SY21253 develops a high efficiency, current mode adaptive constant off time controlled, asynchronous step-down DC/DC converter capable of delivering 3A output current. The SY21253 operates over a wide input voltage range from 4.5V to 100V and integrates main switch with very low RDS(ON) to minimize the conduction loss. The switching frequency is adjustable from 100kHz to 500kHz using an external resistor. And the device features cycle-by-cycle peak current limitation.
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
The EVB_SY21253FCC is intended for evaluating 3A current and 100V maximum input voltage asynchronous step down regulator.
| Title | Date |
|---|---|
| Automotive_Solutions_Q1_2026 | 2026-02-09 |
| Silergy_Catalog_Q1_2026 | 2026-02-09 |
| SO8E | 2022-05-20 |
