SC401B View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC401B

15A Integrated FET Regulator with Programmable LDO

Semtech Corporation 

SC401B

Electrical Characteristics (continued)

Parameter

Conditions

Min Typ Max Units

Linear Regulator (LDO)

FBL Accuracy

VLDO load = 5mA

0.728 0.75 0.773

V

LDO Current Limit

VLDO to VOUT Switch-over Threshold (4)

Short-circuit protection, VIN = 12V, VDD < 0.75V

Start-up and foldback, VIN = 12V,

0.75 < VDD < 90% of final VDD value

Operating current limit, VIN = 12V,

VDD > 90% of final VDD value

65

115

mA

135 200

-130

+130 mV

VLDO to VOUT Non-switch-over Threshold (4)

-500

+500 mV

VLDO to VOUT Switch-over Resistance

VOUT = +5V

2

Ω

LDO Drop Out Voltage (5)

From VIN to VDD, VDD = +5V, IVLDO = 100mA

1.2

V

Notes:

(1) VIN UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.

(2) Typical value measured on standard evaluation board.

(3) SC401B has first order temperature compensation for over current. Results vary based upon the PCB thermal layout.

(4) The switch-over threshold is the maximum voltage differential between the VDD and VOUT pins which ensures that VLDO will internally

switch-over to VOUT. The non-switch-over threshold is the minimum voltage differential between the VLDO and VOUT pins which ensures

that VLDO will not switch-over to VOUT.

(5) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point.



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