STEVAL-ISA052V2 STMicroelectronics, STEVAL-ISA052V2 Datasheet - Page 31

• Manufacturer Part Number: STEVAL-ISA052V2
• Description: BOARD EVAL BASED ON PM6675A
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA052V2

• Design Resources: STEVAL-ISA052V2 Gerber Files STEVAL-ISA052V2 Schematic STEVAL-ISA052V2 Bill of Material
• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 2, Non-Isolated
• Voltage - Output: 1.5V, 0.6 ~ 3.3V
• Voltage - Input: 4.5 ~ 36 V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6675AS
• Input Voltage: 4.5 V to 36 V
• Output Voltage: 1.5 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• For Use With/related Products: PM6675AS
• Other names: 497-8413

PM6675AS
7.1.12
7.2
The Under-Voltage Protection circuit is enabled only at the end of the soft-start. Once an
UVP has taken part, a toggle on SWEN pin or a Power-On-Reset is necessary to clear the
fault state and restart the section.
Device thermal protection
The internal control circuitry of the PM6675AS self-monitors the junction temperature and
turns all outputs off when the 150 °C limit has been overran. This event causes the switching
section to be immediately disabled and both switches to be opened. The controller performs
a soft-end and both the outputs are eventually kept to ground, then the low side MOSFET is
turned on when the voltage of the switching section is lower than 400 mV.
The thermal fault is a latched protection and normal operating condition is restored by a
Power-On Reset or toggling SWEN and LEN pins at the same time.
Table 9.
LDO linear regulator section
The independent Low-Drop-Out (LDO) linear regulator has been designed to sink and
source up to 2 A peak current and 1 A continuously. The LDO output voltage can be
adjusted in the range 0.6 V to 3.3 V simply connecting a resistor divider as shown in
Figure 34 on page 32
Equation 23
Under voltage
Junction over
Over voltage
temperature
Fault
Switching section OV, UV and OT faults management
VOUT < 70 % of the nominal
VOUT > 115 % of the
.
nominal value
T
Conditions
J
> +150 °C
value
VLDO
ADJ
LGATE pin is forced high and the device latches off.
Exit by a Power-On Reset or toggling SWEN
LGATE pin is forced high after the soft-end, then the
device latches off. Exit by a Power-On Reset or
toggling SWEN.
LGATE pin is forced high after the soft-end, then the
device latches off. Exit by a Power-On Reset or
toggling SWEN and LEN after temperature drop.
=
0
6 .
⋅
R
19
R
+
20
R
20
Action
Device description
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