SC2443EVB(2007) Просмотр технического описания (PDF) - Semtech Corporation

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Компоненты Описание

производитель

SC2443EVB
(Rev.:2007)

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

Semtech Corporation 

SC2443

Electrical Characteristics (continued)

Parameter

Symbol

Conditions

Channel 2 Error Amplifier

Input Common-mode Range(1)

Inverting Input Voltage Range(1)

Input Offset Voltage

Non-inverting Input Bias Current

Inverting Input Bias Current

Inverting Input Voltage for 2 phases

Single Output Operation

Amplifier Transconductance

Amplifier Open Loop Gain

Amplifier Unity Gain Bandwidth

COMP2 Switching Threshold

Amplifier Output Sink Current

Amplifier Output Source Current

Oscillator

Channel Frequency

Synchronizing Frequency(1)

SYNC Input High Voltage

SYNC Input Low Voltage

Channel Maximum Duty Cycle

Channel Minimum Duty Cycle

Current Limit Comparator

Input Common Mode Range

Cycle by cycle Peak Currentr Limit

Valley Current Overload Shutdown

Threshold

Positive Current sense

Input Bias Current

Negative Current sense

Input Bias Current

IIN2+

IIN2-

GM2

AOL2

fCH1, fCH2

DMAX1, DMAX2

DMIN1, DMIN2

V , V ILIM1+ ILIM2+

V , V ILIM1- ILIM2-

ICS1+ , ICS2+

ICS1- , ICS2-

VCS2+=VCS2- = 0, VSS2 Rising

VCOMP2 = 2.5V

VCOMP2 = 2.5V

VCS1- = VCS2- = 0.5V, Sourcing

VCS1- = VCS2- = 0.5V, Sinking

VCS1+ = VCS1- = 0

VCS2+ = VCS2- = 0

VCS1+ = VCS1- = 0

VCS2+ = VCS2- = 0

Min

0

0

2.5

450

2.1fCH

1.5

0

60

-85

Typ Max Units

3

V

AVCC

V

1.5

mV

-150 -380

nA

-100 -250

nA

V

260

µW-1

65

dB

5

MHz

2.2

V

16

µA

12

µA

500

550

kHz

kHz

V

0.5

V

88

%

0

%

AVCC-1 V

75

90

mV

-110 -130

mV

-0.7

-2

µA

-0.7

-2

µA



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