ML4771 Просмотр технического описания (PDF) - Micro Linear Corporation
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ML4771 Datasheet PDF : 8 Pages
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ML4771
VIN
100µF
268kΩ
20µH
(Sumida CD75)
ML4771
VL1 PWR GND
VIN
NC
GND
VL2
SENSE VOUT
259kΩ
IOUT
VIN
200µF
Figure 1. Application Test Circuit.
IL
VIN
2
RSENSE
1
VL1
6
VL2
START-UP
+
–
BOOST
CONTROL
Q1
A1
SYNCHRONOUS
RECTIFIER
CONTROL
Q2
A2
A3
2.57V
ISET
VOUT
5
SENSE
4
VOUT
R1
R2
GND
3
PWR GND
8
Figure 2. PFM Regulator Block Diagram.
IL(MAX)
IL
ISET
0
VOUT
VL2
0
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
Figure 3. Inductor Current and Voltage Waveforms.
4
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