SC4519 Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC4519

600kHz, 3A Step-Down Switching Regulator

Semtech Corporation 

SC4519

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

Limits

Units

Input Supply Voltage

VIN

-0.3 to +24(1)

V

Boost Pin Above VSW

(VBST - VSW)

16

V

Boost Pin Voltage

VBST

-0.3 to +32

V

EN Pin Voltage

VEN

-0.3 to +16

V

FB Pin Voltage

VFB

-0.3 to +6

V

FB Pin Current

IFB

1

mA

SYNC Pin Current

ISYNC

1

mA

Thermal Impedance Junction to Ambient (2)

θJA

36.5

°C/W

Operating Ambient Temperature Range

TA

-40 to +85

°C

Maximum Junction Temperature

TJ

150

°C

Storage Temperature Range

TSTG

-65 to +150

°C

Lead Temperature (Soldering) 10 sec

TLEAD

300

°C

ESD Rating (Human Body Model)

ESD

2

kV

Notes:

(1) For proper operation of device, VIN should be within maximum Operating Input Voltage as defined in Electrical

Characteristics.

(2) Minimum pad size.

Electrical Characteristics

Unless specified: VIN = 12V, VCOMP = 0.8V, VBST = VIN + 5V, EN = tied to VIN, SYNC = 0, SW = open.

TA = TJ = -40°C to 85°C.

Parameter

Symbol

Conditions

Operating Input Voltage

Maximum Switch Current Limit

Oscillator Frequency

Switch On Voltage Drop

VIN Undervoltage Lockout

VIN Supply Current

Standby Current

VIN

ISW

fOSC

VD(SW)

VUVLO

IQ

IQ(OFF)

ISW = 3A

TA = 25oC

VFB = VOUT(NOM) + 17%

VEN = 0V, VIN = VBOOST = 16V, VSW = 0V

Min Typ Max Units

16(1)

V

3.0

A

550 600 750 kHz

330

mV

2.60 3

V

1.0

5

mA

5

45

µA

 2007 Semtech Corp.

2

www.semtech.com

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