SC2443MLTRT datasheet(5/20 Pages) SEMTECH

Part #	SC2443MLTRT

Description	Dual-Phase Single or Two Output Synchronous Step-Down Controller

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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5 / 20 page

SC2443

5

Notes:

() Guaranteed by design.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Gate Drivers

High side Gate Driver

Peak Source Current

V

BST, VBST2 = 2V

.5

A

High side Gate Driver

Peak Sink Current

V

BST, VBST2 = 2V

A

Low side Gate Driver

Peak Source Current

AVCC = PVCC = 2V

.5

A

Low side Gate Driver

Peak Sink Current

AVCC = PVCC = 2V

A

Gate Drive Rise Time

C

L = 2200pF

20

ns

Gate Drive Fall Time

C

L = 2200pF

20

ns

Low side Gate Driver to High side

Gate Driver Non-overlapping delay

C

L = 0

90

ns

High side Gate Driver to Low side

Gate Driver Non-overlapping delay

C

L = 0

90

ns

Minimum On Time

T

A = 25°C

50

ns

Soft Start, Overload Latchoff and Enable

Soft Start Charging Current

I

SS , ISS2

V

SS = VSS2 = .5V

2

µA

Overload Enabling Soft Start Voltage

V

SS and VSS2 Rising

3.2

V

Overload IN- Threshold

V

SS = 3.8V, VIN- falling

0.75V

REF

V

Overload IN2- Threshold

V

SS2 = 3.8V, VIN2- falling

0.72 X

V

Soft Start Discharge Current

I

SS _DIS , ISS2_DIS

V

SS = VSS2 = 3.8V

.4

µA

Overload Recovery Soft Start Voltage

V

SSRCV ,

V

SSRCV2

V

SS and VSS2 Falling

0.3

0.5

0.7

V

Gate Driver Disable SS/EN Voltage

0.7

0.9

V

Gate Driver Enable SS/EN Voltage

.2

.5

V

Internal 0.5V Reference Buffer

Output Voltage

V

REF

I

REF = -mA

490

500

50

mV

Load Regulation

0 < I

REF <-5mA

0.05

%/mA

Electrical Characteristics (continued)

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