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MC33466

Fixed Frequency PWM Micropower DC-to-DC Converter

ON Semiconductor 

MC33466

Fixed Frequency PWM

Micropower DC-to-DC

Converter

The MC33466 series are micropower switching voltage regulators,

specifically designed for handheld and laptop applications, to provide

regulated output voltages using a minimum of external parts. A wide

choice of output voltages are available. These devices feature a very

low quiescent bias current of 15 µA typical.

The MC33466H–XXJT1 series features a highly accurate voltage

reference, an oscillator, a pulse width modulation (PWM) controller, a

driver transistor (Lx), an error amplifier and feedback resistive

divider.

The MC33466H–XXLT1 is identical to the MC33466H–XXJT1,

except that a drive pin (EXT) for an external transistor is provided.

Due to the low bias current specifications, these devices are ideally

suited for battery powered computer, consumer, and industrial

equipment where an extension of useful battery life is desirable.

MC33466 Series Features:

• Low Quiescent Bias Current of 15 µA

• High Output Voltage Accuracy of ±2.5%

• Low Startup Voltage of 0.9 V at 1.0 mA

• Soft–Start = 500 µs

• Surface Mount Package

http://onsemi.com

MARKING

DIAGRAM

TAB SOT–89

xxy

H SUFFIX

1

CASE 1213

yzz

xx = Voltage Option (30, 33, 50)

yy = 1A = JT1, 2B= LT1

zz = Lot Code

PIN CONNECTIONS

MC33466H–XXJT1

Ground 1

Output 2

Lx 3

(Top View)

Tab

(Tab is connected

to Pin 2)

MC33466H–XXLT1

Ground 1

Output 2

EXT 3

(Top View)

Tab

(Tab is connected

to Pin 2)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 13 of this data sheet.

© Semiconductor Components Industries, LLC, 2001

1

November, 2001 – Rev. 5

Publication Order Number:

MC33466/D

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