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The RTQ2812A is a high-performance, synchronous step-down converter that can deliver up to 12A output current with a wide input supply voltage range of 3.5V to 17V. The device integrates low RDS(ON) power MOSFETs, an accurate 0.6V ± 1% reference over the full operating junction temperature range, and an integrated diode for the bootstrap circuit, offering a very compact solution.
The RTQ2812A adopts Advanced Constant-On-Time (ACOT®) control architecture that provides excellent transient performance and reduces the count of external components. In steady states, the ACOT® can operate at nearly constant switching frequency over line, load and output voltage ranges, making the EMI filter design easier.
The device offers a variety of functions to provide more design flexibility. The selectable switching frequency, current limit level, PWM operation modes make the RTQ2812A easy-to-use over wide application range. An independent enable control input pin and power-good indicator are also provided for easy sequence control. The device provides a programmable soft-start-up by an external capacitor connected to the SS/TR pin to control the inrush current during start-up
The RTQ2812A provides complete protection functions including input undervoltage lockout, output undervoltage protection, output overvoltage protection, overcurrent protection, and thermal shutdown. The RTQ2812A is available in a thermally enhanced WQFN-21TL 3x4 (FC) package.
The recommended junction temperature range is -40°C to 150°C.

Applications

  • Servers, Storage and Network Equipment
  • Telecom Infrastructure
  • Point of Load (POL) Power Modules
  • High Density DC-DC Converters
Key Spec.
RTQ2812A
Status Active
Vin (min) (V) 2.7;3.5
Vin (max) (V) 17
Number of Outputs 1
Vout (min) (V) 0.6
Vout (max) (V) 5.5
Output Adj. Method Resistor
Iout (max) (A) 12
Current Limit (typ) (A) 12
Freq (typ) (kHz) 1000;600;800
Freq (min) (kHz) 13.3
Freq (max) (kHz) 3.8
Ext Sync No
Ron_HS (typ) (mOhm) 13.3
Ron_LS (typ) (mOhm) 3.8
Iq (typ) (mA) 1150
Features ACOT Control;Adjustable Soft-Start;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;Power Good;SCP;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type WQFN3x4-21T(FC)
Features
  • Wide Input Voltage Range
    ► 2.7V to 17V with External 3.3V VCC Bias
    ► 3.5V to 17V with Internal VCC Bias
  • Output Voltage from 0.6V to 5.5V
  • 0.6V ± 0.5% Voltage Reference from 0°C to 70°C Junction Temperature Range
  • 0.6V ± 1% Voltage Reference from -40°C to 150°C Junction Temperature Range
  • ACOT® Control for Excellent Transient Performance
  • Stable with Ceramic Output Capacitors
  • Selectable FCCM or PSM Operation at Light Load
  • Selectable Operation Switching Frequency (600KHz/800KHz/1MHz)
  • Non-Latch for OCP, UVP, UVLO, and OTP Faults, Latch Off for OVP
  • Differential Remote Sense Voltage for High Output Accuracy
  • Power-Good Indicator
  • Enable Control
  • Programmable Soft-Start Time with a Default 1ms
  • Programmable Valley Current Limit Level
  • Monotonic Start-Up into Pre-Biased Outputs
  • Output Voltage Tracking
  • Small 21T-Lead WQFN (3x4) (FC) Package
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RTQ2812AGQWFWQFN3x4-21T(FC)1,500 Request Digikey 1,418 Buy
Mouser 0 Lead-Time: 14 weeks
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RTQ2812AGQWF Digikey 5 Buy
Mouser 0 Lead-Time: 14 weeks
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