ML4865 Datasheet, PDF (4/10 Pages) Fairchild Semiconductor – High Voltage High Current Boost Regulator

ML4865
PRODUCT SPECIFICATION
VIN
100µF
ML4865
SENSE
GND
VOUT
SHDN
VIN
VL2
VL1 PWR GND
27µH
(Sumida CD75)
Figure 1. Application Test Circuit
IOUT
100µF
VIN
3
VIN
L1
4
VL1
150mΩ
6
VL2
Q3
SHUTDOWN
CONTROL
SHDN
7
A1
+
–
Q2
A2
VOUT
8
Q1
BOOST
CONTROL
ISET
A3
FEEDBACK
CONTROL
2.42V
R1
SENSE
1
R2
Figure 2. PFM Regulator Detailed Block Diagram
+
C1 VOUT
–
IL(MAX)
IL
ISET
0
VOUT
VL
0
Q1 ON
Q2 OFF
Q1 OFF
Q2 ON
Figure 3. Inductor Current and Voltage Waveforms
4
REV. 1.0.2 8/10/01