STEVAL-SPDC01V1 STMicroelectronics, STEVAL-SPDC01V1 Datasheet - Page 19

• Manufacturer Part Number: STEVAL-SPDC01V1
• Description: BOARD EVAL BASED ON SPDC12L00010
• Manufacturer: STMicroelectronics

Specifications of STEVAL-SPDC01V1

• Mfg Application Notes: SPDC12L00010/STEVAL-SPDC01V1 Demo Board AppNote
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 0.6 ~ 5 V
• Current - Output: 10A
• Voltage - Input: 1.8 ~ 14 V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: SPDC12L00010
• Input Voltage: 1.8 V to 14 V
• Board Size: 15 mm x 15 mm
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Product: Power Management Modules
• Dimensions: 15 mm x 15 mm
• Silicon Manufacturer: ST Micro
• Silicon Core Number: SPDC12L00010
• Kit Application Type: Power Management
• Application Sub Type: DC/DC Converter
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-9009

SPDC12L00010
5.6
5.7
5.8
Note:
Power Good signal and Power Good delay
The output voltage is monitored by FB (pin L9), if it is not within ± 10% (typ.) of the
programmed value, the PG (pin L4) output is forced low.
The PG signal can be delayed by adding an external capacitor on PGDLY (pin L5), the delay
can be calculated with the following formula:
Oscillator setting
The switching frequency is internally fixed to 729 kHz, this value can be slightly varied using
an external resistor R
J11).
Since the OS pin is maintained at fixed voltage (typ. 1.2), the frequency is
increased/decreased proportionally to the current sunk/sourced from/into the pin.
In particular, connecting R
formula:
Connecting R
Current sink-mode
Connecting a proper resistor (see par.
(pin J11), it is possible to select the sink-mode operation, that means to allow the output
current to reverse its polarity into the converter output inductor.
If the sink-mode is enabled, the converter can sink current from the load after soft-start;
If the sink-mode is disabled, the converter never sinks current.
When output low current operation is required (Iout < 2 A), sink-mode operation is
recommended, this condition improves output voltage transient response and reduces
output voltage ripple.
OS
to VAUX the frequency is reduced according to the following formula:
OS
connected between OS (pin K11) and SGND (L8) or VAUX (pin
OS
to SGND the frequency is increased according the following
Doc ID 15103 Rev 3
f
f
SW
SW
PG
= 729 + (9.88x10
= 729 - (30.1x10
delay
Section 5.10 on page 20
= 0.5 x C
PGDLY
6
6
/R
/R
OS
(pF) [μs]
OS
) [kHz]
) [kHz]
) from PRG (pin L7) to VAUX
Application information
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