SC461ULTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC461ULTRT

EcoSpeed® DC-DC Buck Controller with Integrated LDO

Semtech Corporation 

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SC461

Typical Characteristics (continued)

Characteristics in this section are based on using the Detailed Application Circuit.

Start-up — EN Input

External 5V bias, VIN = 12V, no load, PSV enabled

EN

(5V/div)

VOUT

(1V/div)

PGOOD

(5V/div)

PGOOD

(5V/div)

VOUT

(1V/div)

LOAD

(10A/div)

LX

(10V/div)

LX

(10V/div)

Time (2ms/div)

Over-current Response

External 5V bias, VIN = 12V, Load 17A

Time (100µs/div)

SS

(5V/div)

VOUT

(1V/div)

PGOOD

(5V/div)

LX

(10V/div)

Start-up — SS ramp-up

External 5V bias, VIN = 12V, no load, PSV enabled

Time (2ms/div)

Automatic Restart — Over-current

External 5V bias, VIN = 12V, Load resistance 50mΩ continuous

SS

(5V/div)

VOUT

(1V/div)

LOAD

(10A/div)

LX

(10V/div)

Time (20ms/div)

Startup into Pre-bias Output

External 5V bias, VIN = 12V, Load 20mA, PSV enabled

EN

(5V/div)

VOUT

(1V/div)

PGOOD

(5V/div)

LX

(10V/div)

Time (2ms/div)

SS

(5V/div)

Automatic Restart — VIN transient

External 5V bias, VIN = 12V, Load 1A

VOUT

(1V/div)

VIN

(10V/div)

LX

(10V/div)

Time (40ms/div)



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