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Richtek

The RTQ2807A is a high-performance, synchronous step-down converter that can deliver up to 6A output current with a wide input supply voltage range from 3.5V to 17V. The device integrates low RDSON power MOSFETs, an accurate 0.9V ± 1% reference over the full operating junction temperature range, and an integrated diode for the bootstrap circuit, offering a very compact solution.
The RTQ2807A adopts an 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 across varying line, load, and output voltage ranges, which making the EMI filter design easier.
The device offers a variety of functions that enhance design flexibility. The selectable switching frequency, current limit level, and PWM operation modes make the RTQ2807A easy-to-use across a wide range of applications. An independent enable control input pin and a power-good indicator are also provided for simplified sequencing control. The device provides a programmable soft-start-time by an external capacitor connected to the SS/TR pin to control the inrush current during startup.
The RTQ2807A provides comprehensive protection functions, including input undervoltage lockout, output undervoltage protection, output overvoltage protection, overcurrent protection, and over-temperature protection. The RTQ2807A is available in a thermally enhanced WQFN-14TL 2x3 (FC) package. The recommended junction temperature range is from -40°C to 150°C.

應用

  • Servers, Storage, and Network Equipment
  • Telecom Infrastructure
  • Point of Load (POL) Power Modules
  • High Density DC-DC Converters
主要規格
RTQ2807
Status Preview
Vin (min) (V) 2.7
Vin (max) (V) 17
Number of Outputs 1
Vout (min) (V) 0.9
Vout (max) (V) 5.5
Output Adj. Method Resistor
Iout (max) (A) 6
Current Limit (typ) (A) 8
Freq (typ) (kHz) 1100
Freq (min) (kHz) 660
Freq (max) (kHz) 2200
Ext Sync No
Ron_HS (typ) (mOhm) 22.6
Ron_LS (typ) (mOhm) 8.1
Iq (typ) (mA) 1050
Features ACOT Control;Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;Power Good;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type WQFN2x3-14T(FC)
關鍵特性
  • 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 0.9V to 5.5V
  • 0.9V ± 1% Voltage Reference Over a -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 (660KHz/1100KHz/2200KHz)
  • Latch-Off for OCP, OVP, UVP, UVLO, and OTP
  • Power-Good Indicator
  • Enable Control
  • Programmable Soft-Start Time with a Default of 1.5ms
  • Programmable Valley Current Limit Level
  • Monotonic Start-Up into Pre-Biased Outputs
  • Output Voltage Tracking
  • Small 14-Lead WQFN (2x3) (FC) Package (Pin Pitch 0.5mm)
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