A6985F:38 V 0.5 A synchronous step-down switching regulator with 30 uA quiescent current

The A6985F automotive grade device is a step-down monolithic switching regulator able to deliver up to 0.5 A DC. The output voltage adjustability ranges from 0.85V to VIN. The 100% duty cycle capability and the wide input voltage range meet the cold crank and load dump specifications for automotive systems. The “Low Consumption Mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light-load with controlled output voltage ripple. The “Low Noise Mode” (LNM) makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the low noise application specification like car audio. The output voltage supervisor manages the reset phase for any digital load (μC, FPGA). The RST open collector output can also implement output voltage sequencing during the power-up phase. The synchronous rectification, designed for high efficiency at medium - heavy load, and the high switching frequency capability make the size of the application compact. Pulse by pulse current sensing on both power elements implements an effective constant current protection.

Key Features

  • AECQ100 qualification
  • 0.5 A DC output current
  • 4 V to 38 V operating input voltage
  • Low consumption mode or low noise mode
  • 30 μA IQ at light-load (LCM VOUT = 3.3 V)
  • 8 μA IQ-SHTDWN
  • Fixed output voltage (3.3 V and 5 V) or adjustable from 0.85 V to VIN
  • Adjustable fSW (250 kHz - 2 MHz)
  • Embedded output voltage supervisor
  • Synchronization
  • Adjustable soft-start time
  • Internal current limiting
  • Overvoltage protection
  • Output voltage sequencing
  • Peak current mode architecture
  • RDSON HS = 360 mΩ, RDSON LS = 150 mΩ
  • Thermal shutdown
产品规格
DescriptionVersionSize
DS10987: 38 V, 500 mA synchronous step-down switching regulator with 30 μA quiescent current4.01 MB
HW Model & CAD Libraries
DescriptionVersionSize
A6985F Pspice model270 KB
A6985F3V3 Spice model268 KB
A6985F5V Spice model267 KB
宣传册
DescriptionVersionSize
A698x family High-performance automotive synchronous DC-DC converters1.01 MB
手册
DescriptionVersionSize
Brochure Power management guide05.20167 MB
解决方案评估工具
型号制造商Description
STEVAL-ISA186V1ST38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F5V
STEVAL-ISA187V1ST38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
A6985F3V3TRHTSSOP16Tape And Reel1.51000NECEAR99MALAYSIA
A6985FTRHTSSOP16Tape And Reel1.51000NECEAR99MALAYSIA
A6985FHTSSOP16Tube1.51000NECEAR99MALAYSIA
A6985F5VTRHTSSOP16Tape And Reel1.51000NECEAR99MALAYSIA
A6985F3V3HTSSOP16Tube1.51000NECEAR99-
A6985F5VHTSSOP16Tube1.51000NECEAR99-
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
A6985F3V3TRHTSSOP16AutomotiveEcopack1
A6985FTRHTSSOP16AutomotiveEcopack1
A6985FHTSSOP16AutomotiveEcopack1
A6985F5VTRHTSSOP16AutomotiveEcopack1 (*)
A6985F3V3HTSSOP16AutomotiveEcopack1
A6985F5VHTSSOP16AutomotiveNot compliant (*)
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