SC2446 View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC2446

Dual-Phase Single or Two Output Synchronous Step-Down Controllers

Semtech Corporation 

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SC2446

POWER MANAGEMENT

Absolute Maximum Rating

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 Ratings

Units

Supply Voltage For Step-Down Controllers

AVCC, PVCC

-0.3 to 20

V

Input Voltage For the Second Converter

High-Side Driver Supply Voltages

VPN

VIN2

V V BST1, BST2

VVPN

-0.3 to 20

V

-0.3 to 32 (steady state)

-0.3 to 40

V

(for <10ns @ freq. < 500kHz)

-0.3 to 20 (steady state)

-0.3 to 26

V

(for <10ns @ freq. < 500kHz)

IN1-, IN2- Voltages

REF, REFOUT Voltages

REFIN Voltage

COMP1, COMP2 Voltages

CS1+, CS1-, CS2+ and CS2- Voltages

SYNC Voltage

SS1/EN1 AND SS2/EN2 Voltages

Peak Gate Drive Currents

Peak VPN1 and VPN2 Output Currents

Ambient Temperature Range

Thermal Resistance Junction to Case (TSSOP-28)

Thermal Resistance Junction to Ambient (TSSOP-28)

Storage Temperature Range

Lead Temperature (Soldering) 10 sec

Maximum Junction Temperature

VIN1-,VIN2-

VREF ,VREFOUT

VREFIN

V V COMP1, COMP2

V V V V CS1+, CS1-, CS2+, CS2-

VSYNC

VSS1,VSS2

IGDH1, IGDH2, IGDL1, IGDL2

IVPN1, IVPN2

TA

θJC

θJA

TSTG

TLEAD

TJ

-0.3 to AVCC+0.3

-0.3 to 6

-0.3 to AVCC+0.3

-0.3 to AVCC+0.3

-0.3 to AVCC+0.3

-0.3 to AVCC+0.3

-0.3 to 6

3

100

-40 to 85

13

84

-60 to 150

260

150

V

V

V

V

V

V

V

A

mA

°C

°C/W

°C/W

°C

°C

°C

Electrical Characteristics

Unless specified: AVCC = PVCC = VIN2 =12V, VBST1 = VBST2 = 12V, SYNC= 0, ROSC = 51.1kΩ, -40°C < TA = TJ < 85°C

Parameter

Symbol

Conditions

Min

Typ

Max Units

Undervoltage Lockout

AVCC Start Threshold

AVCC Start Hysteresis

AVCC Operating Current

AVCC Quiescent Current in UVLO

Channel 1 Error Amplifier

AVCCTH

AVCCHYST

ICC

AVCC Increasing

AVCC= 12V

AVCC = AVCCTH - 0.2V

4.5

4.7

V

0.17

V

12

16

mA

1.7

mA

Non-inverting Input Voltage

Non-inverting Input Line Regulation

Input Offset Voltage

Inverting Input Bias Current

Amplifier Transconductance

Amplifier Open-Loop Gain

Amplifier Unity Gain Bandwidth

Minimum COMP1 Switching Threshold

 2004 Semtech Corp.

VIN1+

AVCCTH < AVCC< 15V

IIN1-

GM1

aOL1

VVCSSS11+In=cVreCaS1s-in=g0

2

0.490

0.500

1

-100

260

65

5

2.2

0.510

0.02

±3

-250

V

%/V

mV

nA

µΩ−1

dΒ

ΜΗz

V

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