SI-8033JD

Step-Down

to 3.3 V, 1.5 A,

DC/DC Converter

www.allegromicro.com

Switching

Regulators

3

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Output Voltage

V

O

3.234

3.30

3.366

V

Ref. Volt. Temp. Coeff.

a

Vref

—

±0.5

—

mV/°C

Output Short-Circuit Current

I

OM

See note

1.6

—

—

A

Efficiency

η

—77

—

%

Operating Frequency

f

—

125

—

kHz

Line Regulation

∆V

O(

∆VI)

V

—

25

80

mV

Load Regulation

∆V

O(

∆IO)

V

—

10

30

mV

Quiescent Current

I

IQ

I

—

7.0

—

mA

V

—

—

200

µA

Chip Enable Voltage

V

CE

Converter turn-off voltage

—

—

0.5

V

Soft-Start Current

I

SS

V

—

—

-100

µA

Typical values are given for circuit design information only.

Note: Output short-circuit current is at point where output voltage has decreased 5% below V

SI-8033JD

Test Circuit

C1 = 220 µF/50 V

C2 = 470 µF/25 V

C3 = 0.47 µF/10 V

L1 = 100 µH

D1 = Sanken SFPB-66