LD5523K

05/16/2018

4

Leadtrend Technology Corporation

www.leadtrend.com.tw

LD5523K-DS-00 May 2018

Absolute Maximum Ratings

Supply Voltage VCC,

-0.3V ~ 30V

COMP

-0.3V ~ 12V

FB, CS

-0.3V ~ 7V

OUT

-0.3V ~ VCC+0.3V

Maximum Junction Temperature

150

C

Storage Temperature Range

-65

C ~ 150C

Package Thermal Resistance (SOT-26, θJA)

200

C/W

Package Thermal Resistance (DIP-8, θJA)

100

C/W

Power Dissipation (SOT-26, at Ambient Temperature = 85

C)

200mW

Power Dissipation (DIP-8, at Ambient Temperature = 85

C)

400mW

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 Junction Temperature

-40

125

C

Supply VCC Voltage

8.0

26.5

V

VCC Capacitor

3.3

10

F

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

400K

2M



Comp Pin Capacitor (X7R type)

330

4700

pF

CS Pin Capacitor Value

47

470

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.

It

’s also essential to connect a capacitor to COMP to filter out the undesired switching

noise for stable operation.

3.

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