EVALPM6680 STMicroelectronics, EVALPM6680 Datasheet - Page 9

• Manufacturer Part Number: EVALPM6680
• Description: BOARD EVALUATION FOR PM6680
• Manufacturer: STMicroelectronics

Specifications of EVALPM6680

• Mfg Application Notes: PM6680 Eval Kit, AN2566 App Note
• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 3, Non-Isolated
• Power - Output: 13.25W
• Voltage - Output: 1.05V, 1.5V, 5V
• Current - Output: 5A, 5A, 100mA
• Voltage - Input: 6 ~ 28V
• Regulator Topology: Buck
• Frequency - Switching: 200kHz, 300kHz
• Board Type: Fully Populated
• Utilized Ic / Part: PM6680
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6241

PM6680
3.2
Functions
Table 4.
N°
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
CSENSE2
PHASE2
HGATE2
LGATE2
LGATE1
SGND1
COMP2
BOOT2
PGND
SHDN
OUT2
FSEL
EN2
FB2
Pin
Pin functions
NC
Signal ground. Reference for internal logic circuitry. It must be connected to
the signal ground plan of the power supply. The signal ground plan and the
power ground plan must be connected together in one point near the PGND
pin.
DC voltage error compensation pin for the switching section 2
Frequency selection pin. It provides a selectable switching frequency,
allowing three different values of switching frequencies for the switching
sections.
Enable input for the switching section 2.
• The section 2 is enabled applying a voltage greater than 2.4 V to this pin.
• The section 2 is disabled applying a voltage lower than 0.8 V.
When the section is disabled the High Side gate driver goes low and Low
Side gate driver goes high. If both EN1 and EN2 pins are low and SHDN pin
is high the device enters in standby mode.
Shutdown control input.
• The device switch off if the SHDN voltage is lower than the device off
threshold (Shutdown mode)
• The device switch on if the SHDN voltage is greater than the device on
threshold.
The SHDN pin can be connected to the battery through a voltage divider to
program an undervoltage lockout. In shutdown mode, the gate drivers of the
two switching sections are in high impedance (high-Z).
Not connected.
Feedback input for the switching section 2 This pin is connected to a
resistive voltage-divider from OUT2 to PGND to adjust the output voltage
from 0.9 V to 3.3 V.
Output voltage sense for the switching section 2.This pin must be directly
connected to the output voltage of the switching section.
Bootstrap capacitor connection for the switching section 2. It supplies the
high-side gate driver.
High-side gate driver output for section 2. This is the floating gate driver
output.
Switch node connection and return path for the high side driver for the
section 2.It is also used as negative current sense input.
Positive current sense input for the switching section 2. This pin must be
connected through a resistor to the drain of the synchronous rectifier
(R
supply controller.
Low-side gate driver output for the section 2.
Power ground. This pin must be connected to the power ground plan of the
power supply.
Low-side gate driver output for the section 1.
DSON
sensing) to obtain a positive current limit threshold for the power
Function
Pin settings
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