SC4518H Просмотр технического описания (PDF) - Semtech Corporation

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SC4518H

600kHz, 2A Step-Down Switching Regulator

Semtech Corporation 

SC4518H

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

Boost Pin Above VSW

Boost Pin Voltage

EN Pin Voltage

FB Pin Voltage

FB Pin Current

SYNC Pin Current

Thermal Impedance Junction to Ambient

Operating Ambient Temperature Range

Maximum Junction Temperature

Storage Temperature Range

Lead Temperature (Soldering) 10 sec

ESD Rating (Human Body Model)

VIN

(VBST - VSW)

VBST

VEN

VFB

IFB

ISYNC

θJA

TA

TJ

TSTG

TLEAD

ESD

-0.3 to +28 (1)

16

-0.3 to +32

-0.3 to +24

-0.3 to +6

1

1

36.5(2)

-40 to +85

+150

-65 to +150

300

2

V

V

V

V

V

mA

mA

°C/W

°C

°C

°C

°C

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 125°C.

Parameter

Symbol

Conditions

Min Typ Max Units

Operating Input Voltage

Maximum Switch Current Limit

Oscillator Frequency

Switch On Voltage Drop

VIN Undervoltage Lockout

VIN UVLO Hysteresis

VIN Supply Current

Standby Current

VIN

ISW

fOSC

VD(SW)

VUVLO

IQ

IQ(OFF)

TA = 25°C, D = 50%

ISW = 2A

VFB = 1V

VEN = 0V

24 (1)

V

2.0

3.0

A

500 600 700 kHz

330

mV

3.9 4.4

V

60

mV

3

5

mA

100 150 µA

 2007 Semtech Corp.

2

www.semtech.com

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