Dual-Output or Two-Phase Synchronous Buck Controller.
SGM64200
SGM64200.pdf
SGM64200.pdf
No.13377
FEATURES
• Two Single-Phase or One Dual-Phase Outputs
• SYNC Pin with One Cycle Clock Recovery
• PHASE Pin with 0°/180° or 90°/270° Operation
• Two Devices in Master-Slave Mode
• Wide Input Supply from 3V to 20V
• Precise Reference of 600mV: ±0.75%
• Adjustable Output from 0.6V to 5.4V
• Adjustable Frequency from 100kHz to 1MHz
• Voltage Mode PWM with Input Feedforward
• Dual N-MOSFET Drivers with Integrated
Bootstrap Switch
• Accurate Inductor DCR or Resistor Current Sense
• Individual Power Good Open-Drain Pin
• Individual Enable Pin & Programmable Soft-Start
Time Capable of Pre-Bias Startup
• Accurate Current Sharing in Dual-Phase
• Remote Output Sense Amplifier in Dual-Phase
• Individual Over-Current Limit Set
• Cycle-by-Cycle Over-Current Limit with Hiccup
• Input Supply Under-Voltage Lock-Out Pin
• Individual Output Over-Voltage/Under-Voltage
Protection
• Thermal Shutdown Protection
• Available in a Green TQFN-5×5-32AL Package
DESCRIPTION
The SGM64200 integrates two synchronous Buck controllers which can be configured as two independent single-phase outputs or one dual-phase output. Two devices can also be linked up as a master-slave through an external pin to provide four single-phase outputs or two dual-phase outputs. The switching phases of linked devices are adjustable to achieve four phases interleaving. The device accepts an input range from 3V to 20V with a precise reference voltage of 0.6V.
The controllers employ fixed frequency voltage mode PWM regulation scheme. Separated enable, current-sense and PGOOD pins are incorporated to allow soft-start times and current limits to be programmable individually. The device offers individual
over-current, output over-voltage and output under-voltage protections.
APPLICATION CIRCUIT
PIN CONFIGUTION
