L6726A STMicroelectronics, L6726A Datasheet - Page 14

• Manufacturer Part Number: L6726A
• Description: IC CTRLR PWM 1PHASE SO-8
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6726A

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 0.8V
• Frequency - Switching: 270kHz
• Voltage - Input: 1.5 ~ 12 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Output Current: 1.5 A
• Input Voltage: 4.1 V to 13.2 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• For Use With: 497-9046 - BOARD EVAL BASED ON L6726A497-6364 - BOARD DEMO FOR TS4995EIJT497-6259 - BOARD EVAL 1PH STPDN CONV L6726A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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