SC1185ACSW.TRT(2005) 데이터 시트보기 (PDF) - Semtech Corporation

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SC1185ACSW.TRT
(Rev.:2005)

Programmable Synchronous DC/DC Converter, Dual LDO Controller

Semtech Corporation 

SC1185 & SC1185A

POWER MANAGEMENT

Absolute Maximum Ratings

Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified

in the Electrical Characteristics section is not implied. Exposure to Absolute Maximum rated conditions for extended periods of time may affect device

reliability.

Parameter

Symbol

Maximum

Units

VCC to GND

PGND to GND

VIN

-0.3 to +7

V

+1

V

BST to GND

-0.3 to +15

V

Operating Temperature Range

Junction Temperature Range

Storage Temperature Range

Lead Temperature (Soldering) 10 Sec.

Thermal Impedance Junction to Ambient

Thermal Impedance Junction to Case

TA

0 to +70

°C

TJ

0 to +125

°C

TSTG

-65 to +150

°C

TL

300

°C

θJA

80

°C/W

θJC

25

°C/W

Electrical Characteristics

Unless specified: VCC = 4.75V to 5.25V; GND = PGND = 0V; VOSENSE = VO; 0mV < (CS+-CS-) < 60mV; LDOV = 11.4V to 12.6V; TA = 0 to 70°C

Parameter

Conditions

Min

Typ

Max

Units

Switching Section

Output Voltage

Supply Voltage

IO = 2A in Application Circuit

VCC

See Output Voltage Table

4.5

7

V

Supply Current

VCC = 5.0V

8

15

mA

Load Regulation

Line Regulation

IO = 0.8A to 15A

1

%

+0.15

%

Current Limit Voltage

60

70

85

mV

Oscillator Frequency

125

140

160

kHz

Oscillator Max Duty Cycle

90

95

%

Peak DH Sink/Source Current BSTH - DH = 4.5V, DH - PGNDH = 3.1V

1

A

DH - PGNDH = 1.5v

100

mA

Peak DL Sink/Source Current BSTL - DL = 4.5V, DL - PGNDL = 3.1V

1

A

DL - PGNDL = 1.5V

100

mA

Gain (AOL)

VID Source Current

VOSENSE to VO

VIDx < 2.4V

35

dB

1

10

µA

VID Leakage

VIDx < 2.4V

10

µA

Power good threshold voltage

88

100

112

%

Dead time

40

100

ns

 2005 Semtech Corp.

2

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