High Efficiency, 100V Input, 3A. Asynchronous Step Down Regulator
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- Parameters
- Features
- Description
| Part Number | SY21253FCC |
|---|
| Vin_min (V) | 4.5 |
|---|
| Vin_max (V) | 100 |
|---|
| Io_max (A) | 3 |
|---|
| Vo_min (V) | 0.8 |
|---|
| Vref Accuracy | ±1% |
|---|
| Fsw (MHz) | 0.1~0.5 |
|---|
| Iq (uA) | 100 |
|---|
| Package | SO8E |
|---|
| Protection Mode | |
|---|
| Features / Special Function | Power Good Indicator, Hic-cup SCP, Adjustable Switching Frequency |
|---|
- Low R DS(ON) for Internal N-channel Power FET(TOP):150mΩ
- 4.5-100V Input Voltage Range
- 3A Output Current Capability
- Adjustable Switching Frequency Range: 100kHz to 500kHz
- Internal Soft-start Limits the Inrush Current
- Hic-cup Mode Output Short Circuit Protection
- EN ON/OFF Control with Accurate Threshold
- Cycle-by-cycle Peak Current Limit
- 0.8V± 1% Reference Voltage Accuracy
- Compact Package: SO8E
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.
Evaluation Board
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.
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