2

© 2009 Semtech Corp.

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SC4808B-2

POWER MANAGEMENT

Absolute Maximum Ratings

Electrical Characteristics

Parameter

Test Conditions

Min

Typ

Max

Unit

PWM

Maximum Duty Cycle

Fosc = 50kHz, FB = 5V,

Measured at OUTA or OUTB

48

49

50

%

Minimum Duty Cycle

Fosc = 50kHz, FB = 1.5V,

Measured at OUTA or OUTB

0

%

Current Sense

Gain

3

Maximum Input Signal

475

525

575

mV

CS to Output Delay

100

ns

Over Current Threshold

.850

.950

1

V

Internal Slope Compensation Resistor

25

k

Ω

FB to CS Offset

1.30

1.50

1.70

V

Output

OUT Low Level

0

.50

.70

V

OUT High Level

11.0

11.25

12.00

V

Rise Time

25

ns

Fall Time

25

ns

Parameter

Symbol

Maximum

Units

Supply Voltage

V

CC

-0.5 to18

V

Supply Current

I

CC

20

mA

SYNC, RC,CS, LUVLO, REF to GND

-0.5 to 7

V

FB to GND

V

FB

-0.5 to (V

REF

+ 0.5)

V

REF Current

I

REF

10

mA

OUTA/OUTB to GND

V

OUTA/B

-0.5 to 18

V

OUTA/OUTB Source Current (peak)

I

source

-250

mA

OUTA/OUTB Sink Current (peak)

I

sink

250

mA

Power Dissipation at T

A

= 25°C

P

D

1.105

W

Thermal Resistance

θ

JA

113.1

°C/W

Junction Temperature

T

J

-40 to 150

°C

Storage Temperature Range

T

STG

-65 to 150

°C

Lead Temperature (Soldering) 10 Sec.

T

LEAD

+300

°C

ESD Rating (Human Body Model)

V

ESD

2

kV

Unless specified: VCC = 12V; CL = 100pF; T

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.