SC483 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

Manufacturer

SC483

Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller

Semtech Corporation 

SC483

POWER MANAGEMENT

Absolute Maximum Ratings(1)

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

TONn to VSSAn

-0.3 to +25.0

V

DHn, BSTn to PGNDn

-0.3 to +30.0

V

LXn to PGNDn

-2.0 to +25.0

V

PGNDn to VSSAn

-0.3 to +0.3

V

BSTn to LXn

-0.3 to +6.0

V

DLn, ILIMn, VDDPn to PGNDn

-0.3 to +6.0

V

EN/PSVn, FBn, PGDn, VCCAn, VOUTn to VSSAn

-0.3 to +6.0

V

VCCAn to EN/PSVn, FBn, PGDn, VOUTn

-0.3 to +6.0

V

Thermal Resistance Junction to Ambient (2)

θJA

84

Operating Junction Temperature Range

Storage Temperature Range

Lead Temperature (Soldering) 10 Sec.

TJ

TSTG

TLEAD

-40 to +125

-65 to +150

300

Notes:

(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.

(2) Measured in accordance with JESD51-1, JESD51-2 and JESD51-7.

°C/W

°C

°C

°C

Electrical Characteristics

Test Conditions: VBAT = 15V, EN/PSV1=EN/PSV2 = 5V, VCCA1 = VDDP1 = VCCA2 = VDDP2 = 5V, VOUT1 = VOUT2 =1.25V, RTON1 = RTON2 = 1MΩ

Parameter

Conditions

25°C

-40°C to 125°C

Units

Min Typ Max Min Max

Input Supplies

VCCA1, VCCA2

5.0

4.5

VDDP1, VDDP2

5.0

4.5

VBAT Voltage

Offtime > 800ns

1.8

25

VDDP1, VDDP2 Operating Current FB > regulation point, ILOAD = 0A

70

VCCA1, VCCA2 Operating Current FB > regulation point, ILOAD = 0A

700

TON1, TON2 Operating Current

RTON = 1M

15

Shutdown Current

EN/PSV1, EN/PSV2 = 0V

-5

5.5

V

5.5

V

V

150

µA

1100 µA

µA

-10

µA

VCCA1, VCCA2

5

VDDP1, TON1, VDDP2, TON2

0

10

µA

1

µA

 2005 Semtech Corp.

2

www.semtech.com

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