High Efficiency, 500kHz, 3A, 23V Input Synchronous Step Down Regulator
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- Parameters
- Features
- Description
| 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 |
|
- Low RDS(ON) for Internal Switches (Top/Bottom): 105mΩ/50mΩ
- 4.5-23V Input Voltage Range
- 3A Output Current Capability
- 500 kHz Switching Frequency
- Instant PWM Architecture to Achieve Fast Transient Responses
- Cycle-by-cycle Peak Current Limitation
- Internal Softstart Limits The Inrush Current
- Hic-Cup Mode Output Short Circuit Protection
- ±1.5% 0.6V Reference
- Power Good Indicator
- TSOT23-8 Package
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
Evaluation Board
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Photo of evaluation board
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Photo of evaluation board
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Photo of evaluation board
The EVB_SY21143AIC is intended for evaluating 3A, 23V input, 500kHz synchronous Buck regulator.
