High Efficiency, 800kHz, 3A, 18V Input Synchronous Buck Converter
- Parameters
- Features
- Description
| Part number |
SY81153MBAT |
| Channel(#) |
1 |
| Vin (min) (V) |
4.5 |
| Vin (max) (V) |
18 |
| Switching frequency (min)(kHz) |
800 |
| Switching frequency (max)(kHz) |
800 |
| Vout (min) (V) |
0.805 |
| Vout (max) (V) |
9.2 |
| Iout (max) (A) |
3 |
| Vout2 (min)(V) |
|
| Vout2 (max )(V) |
|
| Iout2 (max)(A) |
|
| Vref accuracy (±%) |
±1% |
| Vout accuracy(±%) |
|
| Control mode |
COT+Ripple |
| Duty cycle (max)(%) |
66% |
| Operation mode |
FCCM |
| Iq (typ) (uA) |
|
| Features |
Hic-Cup OUVP, Auto-Recovery Mode OTP, COT and Ripple |
| Package |
SOT583 |
| Operating temperature range(°C) |
-40°C to 125°C |
| Functional safety category |
|
- Low RDS(ON) for Internal MOSFETs: 65mΩ Top, 30mΩ Bottom
- Wide Input Voltage Range: 4.5V ~ 18V
- Up to 3A Output Current
- Precise ±1% 0.805V Reference under 25°C
- Precise EN Threshold
- Forced Continuous Conduction Mode(FCCM) Operation
- 800kHz Switching Frequency Minimizes the External Components
- Constant On-time and Ripple-Based Control to Achieve Fast Transient Responses
- Programmable Soft-Start Time
- Cycle-by-Cycle Valley and Peak Current Limit Protection
- Hic-Cup Mode Output Under Voltage Protection
- Auto-Recovery Mode Over Temperature Protection
- Input Under Voltage Lockout (UVLO)
- RoHS-Compliant and Halogen-Free
- Compact Package: SOT583
The SY81153M high efficiency 800kHz synchronous buck converter operates over a wide input voltage range of 4.5V to 18V, and can deliver an output current up to 3A. It integrates a top MOSFET and a bottom MOSFET with very low RDS(ON) to minimize conduction loss. The 800kHz pseudo-constant switching frequency enables using small external inductor and capacitor values.
