STEVAL-ISA052V1 STMicroelectronics, STEVAL-ISA052V1 Datasheet - Page 35

• Manufacturer Part Number: STEVAL-ISA052V1
• Description: KIT EVAL PM6675S HE CTLR 2A REG
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISA052V1

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 2, Non-Isolated
• Voltage - Output: 1.5V, 0.6 ~ 3.3V
• Current - Output: 10A, 2A
• Voltage - Input: 4.5 ~ 28 V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6675
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8426

PM6675S
7.1.12
7.2
Device thermal protection
The internal control circuitry of the PM6675S self-monitors the junction temperature and
turns all outputs off when the 150 °C limit has been overrun. 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, in normal operating conditions it 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 44
Equation 23
Figure 44. LDO output voltage selection
Under voltage
Junction over
Over voltage
temperature
Fault
.
Switching section OV, UV and OT Faults management
VOUT > 115 % of the
VOUT < 70 % of the
V
nominal value
nominal value
T
Conditions
LOUT
J
C
> +150 °C
OUT
VLDO
Cc
ADJ
R20
=
R19
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 15°C temperature
drop.
0
6 .
⋅
R
LOUT
LFB
LGND
19
R
PM6675
PM6675S
+
20
R
20
Action
Device description
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