ML4769ES Просмотр технического описания (PDF) - Micro Linear Corporation
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ML4769ES Datasheet PDF : 8 Pages
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ML4769
VIN
100µF
268kΩ
27µH
(Sumida CD75)
ML4769
VL1 PWR GND
VIN
SHDN
GND
VL2
SENSE
VOUT
259kΩ
IOUT
VIN
100µF
Figure 1. Application Test Circuit
VIN
2
IL
1
VL1
RSENSE
START-UP
+
–
A1 SHDN
BOOST
CONTROL
6
VL2
SHDN
SHUTDOWN
Q3
CONTROL
7
SYNCHRONOUS
RECTIFIER
CONTROL
Q2
A2
Q1
ISET
PWR GND
8
A3
2.57V
GND
3
VOUT
5
SENSE
4
VOUT
R1
COUT
R2
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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