5

© 2007 Semtech Corp.

www.semtech.com

SC411

POWER MANAGEMENT

Notes:

1) When the inductor is in continuous and discontinuous conduction mode, the output voltage will have a DC regulation level higher than the

error-comparator threshold by 50% of the ripple voltage.

2) Using a current sense resistor, this measurement relates to PGND minus the voltage of the source on the low-side MOSFET. These values

guaranteed by the ILIM Source Current and Current Comparator Offset tests.

3) clks = Switching cycles.

4) Guaranteed by design. See Shoot-Through Delay Timing Diagram on Page 8.

pull-up device is activated, reducing the resistance to 2Ω (typ). This negates the need for an external gate or boost resistor.

Parameter

Conditions

25°C

-40°C to 125°C

Units

Min

Typ

Max

Min

Max

Soft-Start

Soft-Start Ramp Time

EN/PSV High to PGD High

440

Under-Voltage Blank Time

EN/PSV High to UV High

440

Gate Drivers

DH or DL Rising

30

ns

DL Pull-Down Resistance

DL Low

0.80

1.75

Ω

DL Sink Current

DL = 2.5V

3.1

A

DL Pull-Up Resistance

DL High

2

4

Ω

DL Source Current

DL = 2.5V

1.3

A

Electrical Characteristics (Cont.)