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6V Input, 1A, ACOT™ Buck Converter in Thin SOT-563 Package

RT5760

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The RT5760 is a simple, easy-to-use, 1A synchronous step-down DC-DC converter with an input supply voltage range of 2.5V to 6V. The device build-in an accurate 0.6V reference voltage and integrates low RDS(ON) power MOSFETs to achieve high efficiency in a SOT-563 (FC) package.The RT5760 adopts Advanced Constant On-Time (ACOTTM) control architecture to provide an ultrafast transient response with few external components and to operate in nearly constant switching frequency over the line, load, and output voltage range. The RT5760A operates in automatic PSM that maintains high efficiency during light load operation. The RT5760B operates in Forced PWM that helps meet tight voltage regulation accuracy requirements. The RT5760C/D remove the power good indicator function of the RT5760A/B for different application.The RT5760 senses both FETs current for a robust over-current protection. The device features cycle-by-cycle current limit protection and prevent the device from the catastrophic damage in output short circuit, over current or inductor saturation. A built-in soft-start function prevents inrush current during start-up. The device also includes input under-voltage lockout, output under-voltage protection, and over-temperature protection (thermal shutdown) to provide safe and smooth operation in all operating conditions.

Applications

  • Mobile Phones and Handheld Devices
  • STB, Cable Modem, and xDSL Platforms
  • WLAN ASIC Power / Storage (SSD and HDD)
  • General Purpose for POL LV Buck Converter
Key Spec.
RT5760A RT5760B RT5760C RT5760D
Status Active Active Active Active
Vin (min) (V) 2.5 2.5 2.5 2.5
Vin (max) (V) 6 6 6 6
Number of Outputs 1 1 1 1
Vout (min) (V) 0.6 0.6 0.6 0.6
Vout (max) (V) 3.8 3.8 3.8 3.8
Output Adj. Method Resistor Resistor Resistor Resistor
Iout (max) (A) 1 1 1 1
Current Limit (typ) (A) 1.55 1.55 1.55 1.55
Freq (typ) (kHz) 2200 2200 2200 2200
Ext Sync No No No No
Ron_HS (typ) (mOhm) 120 120 120 120
Ron_LS (typ) (mOhm) 80 80 80 80
Iq (typ) (mA) 0.025 0.3 0.025 0.3
Features 100% Duty Cycle;ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;PSM;Power Good;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Force PWM;Internal Compensation;OCP;OTP;Power Good;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;PSM;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Force PWM;Internal Compensation;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type SOT-563(FC) SOT-563(FC) SOT-563(FC) SOT-563(FC)
Features
  • Input Voltage Range of 2.5V to 6V
  • Integrated 120mΩ and 80mΩ FETs
  • 1A Output Current, up to 95% Efficiency
  • 100% Duty Cycle for Lowest Dropout
  • 0.6V, 1% Internal Reference Voltage
  • 2.2MHz Typical Switching Frequency
  • Power Saving Mode for Light Loads (RT5760A/C)
  • Low Shutdown Current ≤ 1μA
  • Low Quiescent Current: 25μA (Typ.)
  • Fast Advanced Constant On-Time (ACOTTM) Control
  • Internal Soft Startup (0.6ms)
  • Independent Enable Control Input
  • Power Good Indicator
  • Both FETs Over-Current Protection
  • Input Under-Voltage Lockout Protection
  • Hiccup-Mode Output Under-Voltage Protection
  • Over-Temperature Protection (Thermal Shutdown)
  • RoHS Compliant and Halogen Free
Datasheet
TitleLast UpdateShareDownload
6V Input, 1A, ACOT™ Buck Converter in Thin SOT-563 Package2019/05/10
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
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