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http://www.union-ic.com Rev.01 Nov.2015

3/13

UM3502QA

Absolute Maximum Ratings (Note 1)

Symbol

Parameter

Value

Unit

Input and Output Voltages

-0.3 to +6.0

V

EN, FB Voltages

V

SW Voltage

V

Peak SW Sink and Source Current

1.5

A

Operating Temperature

-40 to +85

°C

Storage Temperature Range

-65 to +150

°C

Reflow Temperature,

MSL3 JEDEC J-STD-020C, 10 Sec

260

°C

Note 1: Stresses greater than those listed under Maximum Ratings may cause permanent damage

to the device. This is a stress rating only and functional operation of the device at these or any

other conditions above those indicated in the operational sections of this specification is not

implied. Exposure to absolute maximum rating conditions for extended periods may affect

reliability.

Electrical Characteristics (Note 2)

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Input Voltage Range

2.5

5.5

V

Output Voltage Range

0.6

5

V

Maximum Output Current

600

mA

300

(Active)

Input DC Supply Current

(Active Mode)

60

μA

(Shutdown)

Input DC Supply Current

(Shutdown Mode)

0.1

1.0

μA

Feedback Voltage

0.5880

0.6000

0.6120

V

0.5830

0.6000

0.6150

FB Input Bias Current

±30

nA

Reference Voltage Line

Regulation

2.5V≤V

0.11

0.40

%/V

Output Voltage Line

Regulation

2.5V≤V

0.11

0.40

%/V

Output Voltage Load

Regulation

100mA≤I

0.0015

%/mA

f

Oscillator Frequency

1.2

MHz

0.45

0.55

Ω

0.30

0.40

Ω

Internal Inductor DCR

0.18

0.23

Ω

Peak Inductor Current

Duty Cycle<35%

0.90

1.20

1.60

A