USR1021

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

3 of 4

www.unisonic.com.tw

QW-R103-073.a



ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

18

V

LX to AGND

V

EN to AGND

V

FB to AGND

-0.3~6.0

V

COMP to AGND

-0.3~6.0

V

PGND to AGND

-0.3~+0.3

V

Junction Temperature

+150

°C

Storage Temperature

-65~+150

°C

Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.



THERMAL DATA

PARAMETER

SYMBOL

RATINGS

UNIT

Junction to Ambient (Note 2)

87

°С/W



RECOMMENDED OPERATING CONDIIONS

PARAMETER

SYMBOL

RATINGS

UNIT

Supply Voltage

6~18

V

Output Voltage Range

V

Ambient Temperature

-40~+85

°C



ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX UNIT

Supply Voltage

6

18

V

Supply Current (Quiescent)

3.5

5

mA

Shutdown Supply Current

1

10

µA

Feedback Voltage

0.788

0.8

0.812

V

Load Regulation

0.5

%

Line Regulation

1

%

Feedback Voltage Input Current

200

nA

EN Input Threshold

Off Threshold

0.6

V

On Threshold

2

V

SS Time

2

ms

MODULATOR

Frequency

400

500

600

kHz

Maximum Duty Cycle

85

%

Controllable Minimum On Time

150

ns

Current Sense Transconductance

7

A/V

Error Amplifier Transconductance

180

µA/V

PROTECTION

Current Limit

3.5

4.5

A

Over-Temperature Shutdown Limit

150

°C

100

°C

Notes: 1. Devices are inherently ESD sensitive, handling precautions are required. Human body model rating: 1.5

kΩ in series with 100pF.

design.

3. Specification in BOLD indicate an ambient temperature range of -40°C~+85°C. These specifications are

guaranteed by design.