6V to 75V Synchronous Buck Controller
With Wide Duty Cycle Range
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- Parameters
- Features
- Description
| Part number |
SQ33068WAQ |
| Channel(#) |
|
| Vin (min) (V) |
6 |
| Vin (max) (V) |
75 |
| Topology |
|
| Switching frequency (min)(kHz) |
100 |
| Switching frequency (max)(kHz) |
1000 |
| Vout (min) (V) |
|
| Vout2 (min)(V) |
|
| Vout (max) (V) |
|
| Vout2 (max )(V) |
|
| Vref accuracy (±%) |
|
| Vout accuracy(±%) |
0.8V±1% |
| Control mode |
|
| Duty cycle (max)(%) |
|
| Operation mode |
|
| Iq (typ) (uA) |
|
| Features |
|
| Package |
QFN3.5x4.5-20 |
| Operating temperature range(°C) |
-40°C to 125°C |
| Functional safety category |
|
- 6V to 75V Input Voltage Range
- 0.8V to 60V Output Voltage Range
- Switching Frequency: 100kHz~1MHz – SYNC In/Out Capability
- Soft-Start or Voltage Tracking
- 0.8V±1% Reference Voltage
- Minimum On-time: 60ns Typical
- Minimum Off-time: 240ns Typical
- Type Ⅲ Voltage-mode Control with Feedforward
- High Gain-bandwidth Error Amplifier
- Open-drain Power Good Indicator
- Protection Features – Cycle-by-cycle Over Current Protection – Prevent Reverse Charging Protection – Input UVLO with Hysteresis – VCC and BST UVLO Protection – Thermal Shutdown Protection with Hysteresis
- Compact Package: QFN3.5x4.5-20
The SQ33068 is 75V synchronous buck controller with type Ⅲ voltage mode control and feedforward. Minimum tens of nanosecond on-time facilitates large step-down ratios. The SQ33068 will continue to operate when the input voltage decreases to as low as 6V. The VIN pin voltage determines whether SQ33068 enters DEM to prevent reverse charging. The Cycle-bycycle over current protection is accomplished by measuring the voltage across the low-side MOSFET or current sense resistor. Forced-PWM (FPWM) eliminates the frequency variation and a selectable diode emulation reduces the power consumption at light-load conditions. The switching frequency as high as 1 MHz can be set or synchronized to an external clock.
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
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Photo of evaluation board
The EVB_SQ33068WAQ is intended for evaluating Synchronous Buck Controller with Wide Duty Cycle Range
