STEVAL-ISA027V1 STMicroelectronics, STEVAL-ISA027V1 Datasheet - Page 14

• Manufacturer Part Number: STEVAL-ISA027V1
• Description: BOARD EVAL 1PH STPDN CONV L6726A
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA027V1

• Design Resources: STEVAL-ISA027V1 Gerber Files STEVAL-ISA027V1 Schematic STEVAL-ISA027V1 Bill of Material
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.25V
• Current - Output: 20A
• Voltage - Input: 5 ~ 12V
• Regulator Topology: Buck
• Frequency - Switching: 270kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6726A
• Input Voltage: 5 V to 12 V
• Output Voltage: 1.25 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6726A
• Other names: 497-6259

Protections
7.3
14/35
Figure 6.
Undervoltage lock out
In order to avoid anomalous behaviors of the device when the supply voltage is too low to
support its internal rails, UVLO is provided: the device will start up when VCC reaches
UVLO upper threshold and will shutdown when VCC drops below UVLO lower threshold.
The 4.1 V maximum UVLO upper threshold allows L6726A to be supplied from 5 V and 12 V
busses in or-ing diode configuration.
Figure 7.
bottom edge
Enable Th
PWM ramp
UVLO Th
700mV
LGATE
COMP
VCC
OC threshold setting procedure timings (top) and waveforms (bottom)
OCP trip, default threshold, LS: STD38NH02L (left) UVLO turn off (right)
Setting Procedure
R
5.5ms - 6.5ms
OCSET
connected
Doc ID 12754 Rev 4
t
DELAY
bottom edge
Enable Th
PWM ramp
UVLO Th
700mV
LGATE
Setting Procedure
VCC
COMP
R
OCSET
not connected
t
DELAY
L6726A