SC2443MLTRT(2007) View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC2443MLTRT
(Rev.:2007)

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

Semtech Corporation 

SC2443

Absolute Maximum Ratings

AVCC, PVCC Voltage …………………………… -0.3 to 20V

VBST1, VBST2 Voltage ……………………………… -0.3 to 32V

SS1/EN1, SS2/EN2, SYNC Voltage ……………… -0.3 to 6V

IN1-, IN2-, REF Voltage ………………… -0.3 to AVCC+ 0.3V

REFIN , COMP1, COMP2 Voltage ………… -0.3 to AVCC+ 0.3V

CS1+, CS1-, CS2+, CS2- Voltage ………… -0.3 to AVCC+ 0.3V

PGND to AGND ……………………………………… ± 0.3V

Peak IR Reflow Temperature …………………………… 260°C

Recommended Operating Conditions

Input Voltage Range ………………………… 4.75V to 16V

Thermal Information

Junction to Ambient(1) …………………………… 29°C/W

Maximum Junction Temperature ……………………… 150°C

Storage Temperature ………………………… -65 to +150°C

Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters

specified in the Electrical Characteristics section is not recommended.

NOTES-

(1) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.

(2) This device is ESD sensitive. Use of standard ESD handing precautions is required

Electrical Characteristics

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

Parameter

Symbol

Conditions

Min

Typ

Undervoltage Lockout

AVCC Start Threshold

AVCC Start Hysteresis

AVCC Operating Current

AVCC Quiescent Current in UVLO

Channel 1 Error Amplifier

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

COMP1 Switching Threshold

Amplifier Output Sink Current

Amplifier Output Source Current

AVCCTH

AVCCHYST

ICC

Iq

VIN1+

IIN1-

GM1

AOL1

AVCC rising

4.5

170

12

AVCC = AVCCTH - 0.2V

1.7

AVCCTH < AVCC < 15V

VCS1+=VCS1- = 0, VSS1 Rising

VIN1- = 1V, VCOMP1 = 2.5V

VIN1- = 0V, VCOMP1 = 2.5V

0.49

0.5

1

-0.1

260

65

5

2.2

16

12

Max Units

4.7

V

mV

16

mA

mA

0.51

V

0.02

%/V

mV

-0.25

µA

µW-1

dB

MHz

V

µA

µA



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