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DC-DC Buck Converter
DC-DC Buck Converter
SCT2821QFQCR
Pre-release
4.4V-80V Vin, 2A, High Efficiency Synchronous Step-down DCDC Converter
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- Product Introduction
- Technical data
- Parameter comparison
Product Features
FEATURES:
• Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
• Wide Input Voltage Range: 4.4V-80V
• Continuous Output Current: 2A
• 1V±1% Feedback Reference Voltage at 25°C
• Integrated MOSFETs 270mΩ / 120mΩ Rdson
• Low shutdown current: 0.6uA
• Low Quiescent Current: 36uA
• Pulse Skipping Mode (PSM) in Light-Load
• Adjustable Frequency 200kHz to 1.5MHz
• External Clock Synchronization
• 3.5ms Internal Soft-start Time
• Power Good Indicator
• Random Spread Spectrum option for reduced EMI
• Low Dropout and Minimum On Time Function
• Precision Enable Threshold for adjustable Input
Voltage Under-Voltage Lock Out Protection
(UVLO) Threshold and Hysteresis
• Support start-up with pre-biased output
• Over-voltage and Over-Temperature Protection
• FCTQFN2.5*3-11L Package
DESCRIPTION:
The SCT2821Q is 2A synchronous buck converters with wide input voltage, ranging from 4.4V to 80V, which integrates a 270mΩ high-side MOSFET and a 120mΩ low-side MOSFET. The SCT2821Q, adopting the peak current mode control, supports the Pulse Skipping Modulation (PSM) with typical 36uA low quiescent current which assists the converter on achieving high efficiency at light load or standby condition. The SCT2821Q features an internal 3.5ms soft-start time to avoid large inrush current and output voltage overshoot during startup. The switching frequency can
be adjusted from 200kHz to 1.5MHz. The SCT2821Q integrates LDO function and minimum on time function, so it can support normal operation within a wide range of duty cycles. The SCT2821Q is an Electromagnetic Interference (EMI) friendly buck converter with implementing optimized design for EMI reduction. The SCT2821Q features Frequency Spread Spectrum FSS uses a pseudorandom frequency hopping with ±8% jittering span of the switching frequency to reduce the conducted EMI. The SCT2821Q offers cycle-by-cycle current limit and hiccup over current protection, thermal shutdown protection, output over-voltage protection and input voltage under-voltage protection. The device isavailable in FCTQFN2.5*3- 11L package.
APPLICATIONS:
APPLICATIONS:
• 48V Automotive Power System
• Chassis System Division
• Powertrain
• Other Automotive Applications
Package information
Technical data
| Title | Time | Download |
|---|---|---|
| SCT2821Q Datasheet Rev 0.8 | 2026-01-28 |
 Download
|
Parameter comparison
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