mc33466 ON Semiconductor, mc33466 Datasheet - Page 9

• Manufacturer Part Number: mc33466
• Description: Fixed Frequency Pwm Micropower Dc-to-dc Converter
• Manufacturer: ON Semiconductor

Line Regulation
Load Regulation
Output Ripple
Efficiency
V
in
330 μF
Test
1.0 k
MMBT2907ALT1
100
Figure 24. MC33466H−33JT1 Step−Down Application
Lx
3
V
V
in
in
= 7.0 V, I
MBRD0520LT1
= 5.0 V to 10 V, I
V
V
in
in
http://onsemi.com
V
Drive
Controller
Oscillator
Lx
= 7.0 V, I
= 7.0 V, I
50 kHz
PWM
BZX84C3V3LT1
Limiter
Condition
O
MC33466H−33JT1
= 3.3 mA to 320 mA
9
O
O
= 320 mA
= 320 mA
O
Soft−Start
= 320 mA
Phase
Comp
47 μH
1.5 k
MMBT2222ALT1
3.3 V
Startup Circuit
V
ref
1
Gnd
Output
2
3.0 mV = ±0.04%
7.0 mV = ±0.1%
70 mVpp
Results
63.8%
330 μF
V
3.3 V
320 mA
O
330 μF