2

FN7428.9

July 13, 2006

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are

PGND to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V

Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A

Operating Ambient Temperature . . . . . . . . . . . . . . . . -40°C to +85°C

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

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the

device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

Electrical Specifications

unless otherwise specified.

PARAMETER

DESCRIPTION

CONDITIONS

MIN

TYP

MAX

UNIT

DC CHARACTERISTICS

Feedback Input Voltage

PWM mode

790

800

810

mV

Junction temperature = -40°C to +85°C

(see Figure 7)

0.3

%

∆V

Line Regulation

0.1

%

0.4

%

Feedback Input Current

100

nA

Input Voltage

2.5

5.5

V

Minimum Voltage for Shutdown

2

2.2

V

Maximum Voltage for Startup

2.2

2.4

V

Input Supply Quiescent Current

Active - PFM Mode

120

145

µA

Active - PWM Mode

6.5

7.5

mA

Supply Current

400

500

µA

0.1

1

µA

70

100

m

Ω

45

75

m

Ω

Current Limit

1.5

A

Over-temperature Threshold

T rising

145

°C

Over-temperature Hysteresis

T falling

130

°C

EN, SYNC Current

-1

1

µA

2.4

1.8

V

9

1.4

0.8

V

95

%

86

%

PG Voltage Drop

35

70

mV

AC CHARACTERISTICS

PWM Switching Frequency

1.25

1.4

1.6

MHz

Minimum SYNC Pulse Width

Guaranteed by design

25

ns

Soft-start Time

650

µs

EL7531