SC4517A Просмотр технического описания (PDF) - Semtech Corporation

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SC4517A

1.25MHz, 1.5A Step-Down Switching Regulator

Semtech Corporation 

SC4517A

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 (1)

Boost Pin Above VSW

Boost Pin Voltage

EN Pin Voltage

FB Pin Voltage

FB Pin Current

SYNC Pin Current

Thermal Impedance Junction to Ambient (2)

MSOP

MLPD

VIN

(VBST - VSW)

VBST

VEN

VFB

IFB

ISYNC

θJA

-0.3 to +24

16

-0.3 to +32

-0.3 to +16

-0.3 to +6

1

1

185

53

V

V

V

V

V

mA

mA

°C/W

Operating Ambient Temperature Range

TA

-40 to +85

°C

Operating Junction Temperature Range

TJ

-40 to +150

°C

Storage Temperature Range

TSTG

-65 to +150

°C

Lead Temperature (Soldering) 10s (MSOP)

TLEAD

300

°C

Peak IR Reflow Temperature 10-40s (MLPD)

TPKG

260

°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 125°C.

Parameter

Symbol

Conditions

Operating Input Voltage (1)

Maximum Switch Current Limit

Oscillator Frequency

Switch On Voltage Drop

VIN Undervoltage Lockout

VIN Standby Current

Shutdown Current

VIN

ISW

fOSC

VD(SW)

VUVLO

IQ

IQ(OFF)

VFB = VOUT(NOM) + 17%

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

Min Typ Max Units

16

V

1.5

A

0.9 1.25 1.6 MHz

330 550 mV

2.60 3

V

1.0

5

mA

45

µA

 2006 Semtech Corp.

2

www.semtech.com

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