SGM61130.pdf
No.11699
? Low Integrated RDSON Switches: 46mΩ/34mΩ
? Split Rails for Supply (VIN) and Power (PVIN)
1.8V to 18V Range for PVIN
4.5V to 18V Range for VIN
? 200kHz to 2MHz Switching Frequency
? External Clock Synchronization
? Voltage Tracking Capability
? 0.8V Internal Reference Voltage
? ±1% Reference Voltage Accuracy
? 3.4μA (TYP) Shutdown Current
? Hiccup Mode Current Limit
? Monotonic Startup with Pre-biased Outputs
? Adjustable Soft-Start Time
? Power Sequencing Capability
? Power Good Output Monitor for Under-Voltage
and Over-Voltage Protections
? Adjustable Input Under-Voltage Lockout (UVLO)
? -40℃ to +125℃ Operating Temperature Range
? Available in a Green TQFN-3.5×3.5-14L Package
The SGM61130 is an efficient, 4A, synchronous, step-down converter with integrated power MOSFETs and a wide 4.5V to 18V input range. This current mode control device is optimized for high density applications with minimal number of external components. High switching frequency, up to 2MHz, can be chosen to reduce the solution size by smaller inductor and capacitors. This device can be used as a standalone or tracking power supply. The SS/TR pin can be used to control the output voltage startup ramp or as an input for tracking.
Power supply sequencing for two or more power supplies is possible by using the enable input (EN) and the open-drain power good output (PG) signals.
The high-side (HS) MOSFET current is cycle-by-cycle limited for overload protection. The low-side (LS) MOSFET sourcing current is also limited to prevent current runaway. The low-side switch also has a sinking current limit that turns it off if an excessive reverse current flows through it.
Thermal shutdown protection disables the device if the die temperature exceeds the shutdown threshold.
The SGM61130 is available in a Green TQFN-3.5×3.5-14L package and can operate over the wide ambient temperature range of -40℃ to +125℃.
