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SC4806MLTRT

Multiple Function Double Ended PWM Controller

Semtech Corporation 

SC4806

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

Supply Current

SYNC, RC,RAMP, LUVLO, REF, ILM, SS to GND

FB to GND

REF Current

OUTA/OUTB to GND

OUTA/OUTB Source Current (peak)

OUTA/OUTB Sink Current (peak)

Thermal Resistance, Junction to Ambient

Thermal Resistance, Junction to Case

Junction Temperature

Storage Temperature Range

Peak IR Reflow Temperature 10 - 40s

ESD Rating (Human Body Model)

VCC

ICC

VFB

IREF

VOUTA/B

Isource

Isink

θJA

θJC

TJ

TSTG

TPKG

ESD

-0.5 to18

20

-0.5 to 7

-0.5 to (VREF+ 0.5)

10

-0.5 to 18

-250

250

32

3

-55 to 150

-65 to 150

260

2

V

mA

V

V

mA

V

mA

mA

°C/W

°C/W

°C

°C

°C

kV

Electrical Characteristics

Unless specified: VCC = 12V; CL = 100pF; TA = -40°C to 105°C

Parameter

Test Conditions

45455

Min

Typ

Max Units

VCC Supply

VCC Start Threshold

7.4

Hysteresis

1.17

Startup Current

VCC < start threshold

Operating Supply Current

FB = 0V, RAMP = 0V

VCC Zener Shunt Voltage

IDD = 10mA

16

PWM

Maximum Duty Cycle

Fosc = 50kHz, FB = 5V,

48

Measured at OUTA or OUTB

Minimum Duty Cycle

Fosc = 50kHz, FB = 1.5V,

Measured at OUTA or OUTB

Current Sense/Limit

ILM Cycle by Cycle Current Limit Threshold

450

ILM to Output Delay

ILM Auto Restart Over Current Threshold

750

FB to RAMP Offset

1.20

8

8.6

V

1.5

1.83

V

150

µA

7

mA

V

49

50

%

0

%

525

600 mV

50

ns

850

950 mV

1.40

1.60

V

 2006 Semtech Corp.

2

www.semtech.com

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