LD7538

4

Leadtrend Technology Corporation

LD7538-DS-00

November 2012

Absolute Maximum Ratings

Supply Voltage VCC

-0.3V ~30V

COMP, OTP, CS

-0.3V ~6V

OUT

-0.3V ~Vcc+0.3V

Maximum Junction Temperature

150

C

Storage Temperature Range

-65

C to 150C

Package Thermal Resistance (SOT-26,



JA)

250

C/W

Package Thermal Resistance (DIP-8,



JA)

100

C/W

Power Dissipation (SOT-26, at Ambient Temperature = 60

C)

250mW

Power Dissipation (DIP-8, at Ambient Temperature = 60

C)

650mW

Lead temperature (Soldering, 10sec)

260

C

ESD Voltage Protection, Human Body Model

2.5 KV

ESD Voltage Protection, Machine Model

250 V

Caution:

Stress exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the

Recommended Operating Conditions is not implied. Extended exposure to stress above Recommended Operating Conditions may affect

device reliability

Recommended Operating Conditions

Item

Min.

Max.

Unit

Operating Ambient Temperature

-40

85

C

Operating Junction Temperature

-40

125

C

Supply VCC Voltage

8.5

26.5

V

VCC Capacitor

3.3

10

F

Start-up resistor Value (AC Side, Half Wave)

400K

1.8M



Comp Pin Capacitor

1

100

nF

CS Pin Capacitor Value

47

390

pF

Note:

1.

It

’s essential to connect VCC pin with a SMD ceramic capacitor (0.1

F~0.47F) to

filter out the undesired switching noise for stable operation. This capacitor should be

placed close to IC pin as possible

2.

Connecting a capacitor to COMP pin is also essential to filter out the undesired

switching noise for stable operation.

3.

The small signal components should be placed to IC pin as possible.