STEVAL-ISA051V1 STMicroelectronics, STEVAL-ISA051V1 Datasheet - Page 33

• Manufacturer Part Number: STEVAL-ISA051V1
• Description: BOARD EVAL PM6670S DDR2/3
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA051V1

• Design Resources: STEVAL-ISA051V1 Gerber Files STEVAL-ISA051V1 Schematic STEVAL-ISA051V1 Bill of Material
• Main Purpose: Special Purpose DC/DC, DDR Memory Supply
• Outputs And Type: 4, Non-Isolated
• Voltage - Output: 1.5V, 1.8V
• Voltage - Input: 4.5 ~ 28V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: PM6670
• Input Voltage: 4.5 V to 28 V
• Output Voltage: 1.8 V, 1.5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: PM6670S
• Kit Application Type: Power Management
• Application Sub Type: DDR2/3 Memory Power Supply Controller
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: PM6670S
• Other names: 497-8411

PM6670S
7.1.7
Figure 38. Soft-start at heavy load (a) and short-circuit (b) conditions, pulse-skip enabled
After a fixed 3 ms total time, the soft-start finishes and UVP is released: if the output voltage
doesn't reach the under voltage threshold within soft-start duration, the UVP condition is
detected and the device performs a soft end and latches off. Depending on the load
conditions, the inductor current may or may not reach the nominal value of the current limit
during the soft-start (
Power Good signal
The PG pin is an open drain output used to monitor output voltage through VSNS (in fixed
output voltage mode) or MODE (in adjustable output voltage mode) pins and is enabled
after the soft-start timer has expired. PG signal is held low if the VDDQ output voltage drops
10 % below or rises 10 % above the nominal regulated value. The PG output can sink
current up to 4 mA.
(a)
Figure 38
Doc ID 14432 Rev 4
shows two examples).
(b)
Device description
33/54