Features: ` FROM 3V TO 5.5V VCC RANGE.` MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V.` 1V TO 28V INPUT VOLTAGE RANGE.` CONSTANT ON TIME TOPOLOGY ALLOWS. OPERATION WITH VERYLOW AND HIGH DUTY CYCLES.` VERY FAST LOAD TRANSIENTS.` 0.6V, ±1% VREF.` SELECTABLE SINKING MODE.` LOSSLESS CURRENT LIMIT, AVAILABLE A...
L6997: Features: ` FROM 3V TO 5.5V VCC RANGE.` MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V.` 1V TO 28V INPUT VOLTAGE RANGE.` CONSTANT ON TIME TOPOLOGY ALLOWS. OPERATION WITH VERYLOW AND HIGH DUTY CYCLES.` VERY F...
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Symbol | Parameter | Value | Unit |
VCC | VCC to GND | -0.3 to 6 | V |
VDR | VDR to GND | -0.3 to 6 | V |
HGATE and BOOT, to PHASE | -0.3 to 6 | V | |
HGATE and BOOT, to PGND | -0.3 to 36 | V | |
VPHASE | PHASE | -0.3-to 30 | V |
LGATE to PGND | 0.3 to VDR+0.3 | V | |
ILIM, VFB, VSENSE, NOSKIP, SHDN, PGOOD, OVP, VREF, INT, GNDSENSE to GND |
-0.3 to VCC+0.3 | V | |
Ptot | Power dissipation at Tamb = 25°C | 1 | W |
Tstg | Storage temperature range | -40 to 150 | °C |
The L6997 is a high efficient solution for networking dc/dc modules and mobile application compatible with 3.3V bus and 5V bus.
L6997's able to regulate an output voltage as low as 0.6V.
The constant on time topology assures fast load transient response. The embedded voltage feed-forward provides nearly constant switching frequency operation. An integrator can be introduced in the control loop to reduce the static output voltage error.
The remote sensing improves the static and dynamic regulation, recovering the wires voltage drop.
Pulse skipping technique reduces power consumption at light loads. Drivers current capability allows output currents in excess of 20A.