High Efficiency, 800kHz, 40V Input, 1.2A Asynchronous Step Down Regulator
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- Parameters
- Features
- Description
| Part number | SY21061ABC |
|---|
| Channel!(#) | 1 |
|---|
| Vin (min) !(V) | 5 |
|---|
| Vin (max) !(V) | 40 |
|---|
| Switching frequency (min)!(kHz) | 800 |
|---|
| Switching frequency (max)!(kHz) | 800 |
|---|
| Vout (min) !(V) | 0.6 |
|---|
| Vout (max) !(V) | 12 |
|---|
| Iout (max) !(A) | 1.2 |
|---|
| Vout2 (min)!(V) | |
|---|
| Vout2 (max )!(V) | |
|---|
| Iout2 (max)!(A) | |
|---|
| Vref accuracy! (±%) | 2 |
|---|
| Vout accuracy!(±%) | |
|---|
| Control mode | COT OFF+Ipeak |
|---|
| Duty cycle (max)!(%) | 80 |
|---|
| Operation mode | Auto PFM |
|---|
| Iq (typ) !(uA) | 160 |
|---|
| Features | Asynchronous |
|---|
| Package | SOT23-6 |
|---|
| Operating temperature range!(°C) | -40 to 125 |
|---|
| Functional safety category | |
|---|
- · Low RDS(ON) for Internal N-channel Power FET: 180mΩ
- · 5V to 40V Input Voltage Range
- · Up to 1.2A Output Current
- · 800kHz Switching Frequency
- · Constant Off-Time and Peak Current Mode Control
- · Internal Soft-Start Limits Inrush Current
- · ±2% 0.6V Reference
- · Output Short Circuit Protection
- · Cycle-by-Cycle Peak Current Limit
- · Over Temperature Protection
- · RoHS-Compliant and Halogen-Free
- · Compact SOT23-6 Package
The SY21061 high-efficiency asynchronous Buck converter can deliver 1.2A output current over a wide input voltage range from 5V to 40V. The SY21061 employs a constant off-time and peak current mode control strategy to achieve fast transient responses. It integrates a main switch with low RDS(ON) to minimize conduction loss.
The 800kHz switching frequency permits low output voltage ripple and reduces external inductor and capacitor sizes. The SY21061 also provides cycle-by-cycle current limiting, over temperature protection, and output short circuit protection.
The SY21061 is available in a compact SOT23-6 package.
Evaluation Board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
The EVB_SY21061ABC is intended for evaluating 1.2A output current, 40V Input, non-synchronous stepdown DC-DC regulator.
