Wide Vin 60V Non-synchronous Boost/Flyback/SEPIC Converter, SCT81570 Replace LM5157-Q1.
SCT81570Q
SCT81570Q.pdf
SCT81570Q.pdfFEATURES
• Qualified for Automotive Applications
• AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: -40°C to 125°C
Ambient Operating Temperature Range
- Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C3B
• Wide Input Voltage Range: 3.1V-55V
• Low Shutdown Current: 2μA
• Low Quiescent Operating Current: 490μA
• +/- 1.5% Feedback Reference Voltage
• High Efficiency LS MOSFET with 77mΩ RDS(ON)
• Adjustable Switching Frequency: 100KHz to
2.2MHz
• Selectable Frequency Dither for EMI Mitigation
• External Frequency Synchronic
• External Compensation
• Pulse Skipping Mode
• Adjustable Soft-start Time
• Power Good Indicator
• Integrated Protection Feature
- Constant Peak-Current Protection Threshold
Over Input Voltage
- Output Overvoltage Protection
- Adjustable Under-voltage Lockout
- Selectable Hiccup Over Load Protection
- Thermal Shutdown Protection:175°C
• TQFN-16L(3mm*3mm)
PIN CONFIGUTION
CROSS
FEATURES
• AEC-Q100 qualified for automotive applications
– Temperature grade 1: –40°C to +125°C TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Suited for wide operating range for car battery
applications
– 2.9-V to 45-V input operating range
– 48-V maximum output (50-V abs max)
– Minimum boost supply voltage of 1.5 V when
BIAS ≥ 2.9 V
– Input transient protection up to 50 V
– Minimized battery drain
• Low shutdown current (IQ ≤ 2.6 µA)
• Low operating current (IQ ≤ 700 µA)
• Small solution size and low cost
– Maximum switching frequency up to 2.2 MHz
– 16-pin QFN package (3 mm × 3 mm) with
wettable flanks
– Integrated error amplifier allows primary-side
regulation without optocoupler (flyback)
– Minimized undershoot during cranking (start
stop application)
– Accurate current limit (see the Device
Comparison Table)
• EMI mitigation
– Selectable dual random spread spectrum
– Lead-less package
• Higher efficiency with low-power dissipation
– 45-mΩ RDSON switch
– Fast switching, small switching loss
• Avoid AM band interference and crosstalk
– Optional clock synchronization
– Dynamically programmable wide switching
frequency from 100 kHz to 2.2 MHz
• Integrated protection features
– Constant current limiting over input voltage
– Selectable hiccup mode overload protection
– Programmable line UVLO
– OVP protection
– Thermal shutdown
• Accurate ±1% accuracy feedback reference
• Adjustable soft start
• PGOOD indicator
• Create a custom design using the LM5157x-Q1
with the WEBENCH® Power Designer
PIN CONFIGUTION
