MC33466 查看數據表（PDF） - ON Semiconductor

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产品描述 (功能)

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MC33466

Fixed Frequency PWM Micropower DC-to-DC Converter

ON Semiconductor 

Vin

330 µF

MMBT2907ALT1

1.0 k

100

3

Lx

MC33466

Startup Circuit

MMBT2222ALT1

BZX84C3V3LT1

1.5 k

3.3 V

47 µH

MBRD0520LT1

VO

3.3 V

320 mA

MC33466H–33JT1

VLx Limiter

Drive

PWM

Controller

50 kHz

Oscillator

Phase

Comp

Soft-Start

Vref

2

Output

330 µF 330 µF

1 Gnd

Figure 24. MC33466H–33JT1 Step–Down Application

Test

Line Regulation

Load Regulation

Output Ripple

Efficiency

Condition

Vin = 5.0 V to 10 V, IO = 320 mA

Vin = 7.0 V, IO = 3.3 mA to 320 mA

Vin = 7.0 V, IO = 320 mA

Vin = 7.0 V, IO = 320 mA

Results

7.0 mV = ±0.1%

3.0 mV = ±0.04%

70 mVpp

63.8%

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