| Part number | SY21143AIC |
|---|---|
| Channel(#) | 1 |
| Vin (min) (V) | 4.5 |
| Vin (max) (V) | 23 |
| Switching frequency (min)(kHz) | 500 |
| Switching frequency (max)(kHz) | 500 |
| Vout (min) (V) | 0.6 |
| Vout (max) (V) | 5.5 |
| Iout (max) (A) | 3 |
| Vout2 (min)(V) | |
| Vout2 (max )(V) | |
| Iout2 (max)(A) | |
| Vref accuracy (±%) | 1.5 |
| Vout accuracy(±%) | |
| Control mode | COT+Ivalley |
| Duty cycle (max)(%) | 75 |
| Operation mode | Auto PFM |
| Iq (typ) (uA) | 100 |
| Features | Power good,Soft start |
| Package | TSOT23-8 |
| Operating temperature range(°C) | -40 to 125 |
| Functional safety category |
The SY21143 is a high efficiency 500 kHz synchronous step down DC/DC converter capable of delivering 3A current. The SY21143 operates over a wide input voltage range from 4.5V to 23V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.
Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500 kHz switching frequency. It adopts the instant PWM architecture to achieve fast transient responses for high step down applications
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
The EVB_SY21143AIC is intended for evaluating 3A, 23V input, 500kHz synchronous Buck regulator.
| Title | Date |
|---|---|
| Automotive Solutions Q4 2025 | 2025-12-02 |
| Consumer Selection Guide Q4 2025 | 2025-12-02 |
| Industrial Designs Q4 2025 | 2025-12-02 |
