LM25061MM-2EVAL National Semiconductor, LM25061MM-2EVAL Datasheet - Page 6

• Manufacturer Part Number: LM25061MM-2EVAL
• Description: BOARD EVALUATION LM25061
• Manufacturer: National Semiconductor

Specifications of LM25061MM-2EVAL

• Main Purpose: Power Management, Hot Swap Controller
• Embedded: No
• Utilized Ic / Part: LM25061-2
• Primary Attributes: High Side MOSFET Driver, Inrush Current Limiting
• Secondary Attributes: Auto Restart, 2.9 V ~ 17 V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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The resistor values are calculated as follows:
- Choose the upper and lower threshold (V
at V
Where the R3 and R4 resistor values are known, the threshold
voltages and hysteresis are calculated from the following:
OUT
.
FIGURE 7. Programming the PGD Threshold
PGDH
) and (V
PGDL
)
6
A pull-up voltage and pull-up resistor are required at PGD as
shown in Figure 7. The pull-up voltage (VPGD) can be as high
as 17V, with transient capability to 20V, and can be higher or
lower than the voltages at VIN and OUT. This EVB is supplied
with pins 1-2 jumpered on JMP2, powering the PGD pin from
the input voltage through a 100 kΩ pull-up resistor. To change
the high level PGD voltage, move the jumper on JMP2 to pins
2-3, and supply the appropriate pull-up voltage to terminal P1
(located next to JMP2). If a delay at the PGD output is desired,
a resistor and capacitor can be added at positions R8 and C6.
LM25061-1 Latch Version
The LM25061-2 supplied on this evaluation board provides a
restart attempt after a fault detection, as described above.
The companion Hot-Swap IC, the LM25061-1, latches off af-
ter a fault detection, with external control required for restart.
Restart is accomplished by momentarily taking the UVLO pin
below its threshold, or by removing and re-applying the input
voltage at VIN. Contact the nearest National Semiconductor
sales office to obtain samples of the LM25061-1.
V
PGD(HYS)
= R3 x 22 µA
30091416