SC4620(2007) Просмотр технического описания (PDF) - Semtech Corporation

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производитель

SC4620
(Rev.:2007)

Low Input Voltage, High Effciency, 2.5A Integrated FET Synchronous Step down DC/DC Regulator

Semtech Corporation 

SC4620

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.

Parameter

Symbol

Maximum

Units

Supply Voltage

PVIN to VCC

PVIN, VCC

-0.3 to 6

V

+/- 0.3

V

FB, COMP, ISET, SYNC/EN, FS, SS, PGOOD to AGND

-0.3 to VCC+ 0.3

V

PGND to AGND

+/- 0.3

V

PHASE Voltage to PGND

PHASE Pulse Voltage to PGND Tpulse < 50ns

Storage Temperature Range

Junction Temperature

IR Reflow Temperature

VPHASE

VPHASE

TSTG

TJ

TP

-0.3 to PVIN+ 0.3

V

-3 to PVIN+ 2

V

-40 to 150

°C

150

°C

260

°C

Recommended Operating Conditions

The Performance is not guarantied if exceeding the specifications below.

Parameter

Symbol

Conditions

Min

Typ

Max Units

Power Supply

Input Voltage Operating Range

Ambient Temperature Range

Junction Temperature

Max. Output Current

VIN

TA

TJ

IOUTMAX

2.3

5.5

V

-40

85

°C

-40

125

°C

0

2.5

A

Electrical Characteristics

Unless otherwise specified, VIN= VCC=SYNC/EN=3.3V, ROSC=51.1KΩ, RISET=27.4KΩ, TA = -40°C to 85°C

Parameter

Symbol

Conditions

Min

Typ

Max Units

Power Supply

Start Threshold Voltage, UVLO

Hysteresis Voltage, UVLO

Supply Current, Shutdown

Supply Current, Operating

VIUV

VIUVHY

ISD

IQswitching

IQL

VIN Rising

VSYNC = 0V

FB = COMP, No Load

FB = 0.6V, No Load

2

2.25

V

120

mV

0.2

1

µA

7

10

mA

3.5

7

mA

 2007 Semtech Corp.



www.semtech.com

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