SC1176 Ver la hoja de datos (PDF) - Semtech Corporation

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Fabricante

SC1176

Dual Synchronous Voltage Mode Controller with Current Sharing Circuitry

Semtech Corporation 

SC1176/SC1176A

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless Specified: VCC = 4.75 to 5.25V, GND = PGND = 0V, FB = VO, 0mV < (CS(+) - (CS(-)) < 60mV , TJ = 25°C

PARAMETER

CONDITIONS

MIN

TYP MAX UNITS

DL Sink Current

DL - PGNG = 3.0V

1.3

A

DL Sink Current

DL - PGND = 2.0V

0.85

A

DL Source Current

BSTL - DL = 3.5V

1.3

A

DL Source Current

BSTL - DL = 2.5V

0.85

A

Dead Time

Note 5

50

100 150

ns

Soft Start Charge Current (2)

25

µA

Soft Start Enable

0% duty cycle

1.4

V

Soft Start End

100% duty cycle

2.5

V

Soft Start Transition(2)

Synchronous mode

3.3

V

Power Good Window(3)

Fold Back Current

Fold Back Voltage Knee

Input Bias Current

VOUT = 0V

I = ILIM

-IN1, +IN2, -IN2

+10

%VOUT

50%

I LIM

0.9

VOUT

V

1

µA

BSTH to DH Leakage

BSTH - DH = 5V

10

µA

DH to PGND Leakage

DH - PGND = 5V

10

µA

BSTL to DL Leakage

BSTL - DL = 5V

10

µA

DL to PGND

DL - PGND = 5V

10

µA

Notes:

(1) Specification refers to application circuit.

(2) The soft start pin sources 25µA to an external capacitor. The converter operates in synchronous mode above the soft

start transition threshold and in asynchronous mode below it.

(3) Power good is an open collector pulled low when the output voltage is outside the ±10% window.

(4) This device is ESD sensitive. Use of standard ESD handling precautions is required.

(5) 200ns maximum at 75°.

Marking Information

(SOIC-20)

(TSSOP-20)

6

TOP

yyww = Date Code (Example: 9908)

xxxx = Semtech Lot # (Example: 90101)

 2006 Semtech Corp.

nnnn = Part Number (Example: 1471)

yyww = Date Code (Example: 0012)

xxxxxx = Semtech Lot # (Example: P94A01)

4

www.semtech.com

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