The RTQ2103A is a full featured 6V, 2A, Advanced Constant-On-Time (ACOT) synchronous step-down converter with two integrated MOSFETs. The advanced COT operation allows transient responses to be optimized over a wide range of loads, and output capacitors to efficiently reduce external component count. The RTQ2103A provides up to 2.7MHz switching frequency to minimize the size of output inductor and capacitors. The RTQ2103A is available in the SOP-8 (Exposed Pad) package.


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Key Spec.
Status Active
Vin (min) (V) 3
Vin (max) (V) 6
Number of Outputs 1
Vout (min) (V) 0.45
Vout (max) (V) 3.3
Output Adj. Method Resistor
Iout (max) (A) 2
Current Limit (typ) (A) 3.2
Freq (typ) (kHz) 2700
Ext Sync No
Ron_HS (typ) (mOhm) 130
Ron_LS (typ) (mOhm) 105
Iq (typ) (mA) 0.03
Features 100% Duty Cycle;ACOT Control;AEC-Q100;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type PSOP-8
  • AEC-Q100 Grade 1 Qualified
  • 3V to 6V Input Voltage Range
  • Advanced COT Control Loop Design
  • Fast Transient Response
  • Internal 130mΩ and 105mΩ Synchronous Rectifier
  • Highly Accurate VOUT Regulation Over Load/Line Range
  • Robust Loop Stability with Low-ESR COUT
  • Automotive Temperature Range -40°C to 125°C
TitleLast UpdateDownload
2A, 6V, Low IQ ACOT Synchronous Step-Down Converter2017/08/09
Technical Documents
TitleItem TypeLast UpdateDownload
Richtek Product Selection Guide [Jan., 2024] Selection Guide2024/01/18
Richtek Automotive Product Selection Guide [Sep., 2022] Selection Guide2022/09/01
Reference Design
TitleLast UpdateDownload
Richtek Load Transient Tool2022/07/25
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ2103AGSP-QAPSOP-82500 Request Buy from Distributor