High Efficiency, Fast Response, 2.0A, 18V Input Synchronous Step Down Regulator
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- Parameters
- Features
- Description
| Part number |
SY21082ABC |
| Channel(#) |
|
| Vin (min) (V) |
4.2 |
| Vin (max) (V) |
18 |
| Switching frequency (min)(kHz) |
|
| Switching frequency (max)(kHz) |
|
| Vout (min) (V) |
0.6 |
| Vout (max) (V) |
|
| Iout (max) (A) |
2 |
| Vout2 (min)(V) |
|
| Vout2 (max )(V) |
|
| Iout2 (max)(A) |
|
| Vref accuracy (±%) |
±1.5% |
| Vout accuracy(±%) |
|
| Control mode |
|
| Duty cycle (max)(%) |
|
| Operation mode |
|
| Iq (typ) (uA) |
|
| Features |
|
| Package |
SOT23-6 |
| Operating temperature range(°C) |
|
| Functional safety category |
|
- 4.2V to 18V Input Voltage Range
- Up to 2A Output Current
- Quiescent Current IQ: 200 µA (typ.)
- Shutdown Current ISHDN: 5 µA (typ.)
- Low RDS(ON) for Internal Switches: 130mΩ Top, 105mΩ Bottom
- 500kHz Switching Frequency Minimizes Required External Components
- Constant-On-Time and Ripple-Based Control
- Stable with 10µF COUT and 2.2µH Inductor
- Instant-PWM Architecture to Achieve Fast Transient Responses
- Cycle-by-Cycle Peak/Valley Current Limits
- Internal Soft-Start Limits the Inrush Current
- Hiccup Mode for Short-Circuit Protection
- Thermal Shutdown with Auto-Recovery
- Output Auto-Discharge Function
- RoHS-Compliant and Halogen-Free
- Compact Package: SOT23-6
The SY21082 high-efficiency synchronous step-down DC/DC regulator operates over a wide input voltage range of 4.2V to 18V, and can deliver an output current up to 2A. It integrates a main switch and a synchronous switch with very low RDS(ON) to minimize conduction loss. The 500kHz pseudo-constant switching frequency enables using small external inductor and capacitor values.
The SY21082 operates using Instant-PWMTM architecture to achieve high efficiency at light loads and fast transient response for applications with high step-down ratios. It also provides cycle-by-cycle current limiting and thermal shutdown protection.
The SY21082 is available in a SOT23-6 package.
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
EVB_SY21082ABC is intended for evaluating 2A, 18V, 500kHz synchronous Buck regulator.
