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SY20111CDQC (SY8081CDQC)

Production
High Efficiency 3MHz, 1A Buck
Datasheet
SY20111CDQC High Efficiency 3MHz, 1A Buck Datasheet
Part number SY20111CDQC
Channel(#) 1
Vin (min) (V) 2.5
Vin (max) (V) 5.5
Switching frequency (min)(kHz) 3000
Switching frequency (max)(kHz) 3000
Vout (min) (V) 1.8
Vout (max) (V) 1.8
Iout (max) (A) 1
Vout2 (min)(V)
Vout2 (max )(V)
Iout2 (max)(A)
Vref accuracy (±%)
Vout accuracy(±%) 2
Control mode Clock+Ipeak
Duty cycle (max)(%) 100
Operation mode Auto PFM
Iq (typ) (uA) 40
Features Output discharge
Package DFN1.5×1.5-6
Operating temperature range(°C) -40 to 125
Functional safety category
  • Low RDS(ON) for internal switches (top/bottom) 230mΩ/150mΩ
  • 2.5~5.5V input voltage range
  • Fixed output voltage:1.8VOUT
  • High switching frequency 3MHz minimizes the external components
  • Internal soft-start limits the inrush current
  • 100% dropout operation
  • RoHS Compliant and Halogen Free
  • Output auto discharge function
  • Compact package: DFN1.5x1.5-6

  SY20111C are high efficiency 3MHz synchronous step down DC/DC regulator ICs capable of delivering up to 1A output current. It can operate over a wide input voltage range from 2.5V to 5.5V and integrate main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss.

Evaluation Board

  • 20111C-1

    Photo of evaluation board

  • 20111C-2

    Photo of evaluation board

  • 20111C-3

    Photo of evaluation board

EVB_ SY20111CDQC

The EVB_ SY20111CDQC is intended for evaluating 3MHz, 1A, 1.8V output synchronous Buck regulator. It features Enable control, output voltage selection inputs. 

Technical Documentation

Title Date
Silergy_Catalog_Q2_2026 2026-06-12