Datasheet
LM5001
VIN
RT
EN
GND
SW
FB
COMP
VCC
V
IN
= 16V ± 48V
V
OUT
= 24V
I
OUT
= 250 mA
C1
4.7 éF
C2
1 PF
C6
22éF
D2
C5
0.015 PF
R1
60.4k
R2
6.04k
R3
52.3k
R4
11.5k
R5
11.5k
R6
634
L1
470 PH
L2
470 PH
C3
10 PF
C4
150 pF
LM5001
VIN
RT
EN
GND
SW
FB
COMP
VCC
V
IN
= 16V ± 36V
V
OUT
= 48V
I
OUT
= 150mA
C1
4.7 éF
C2
1 éF
C3
10éF
D2
C4
2200 pF
R1
60.4k
R2
6.04k
R3
52.3k
R4
73.2k
R5
54.9k
R6
1.47k
L1
100 PH
LM5001
,
LM5001-Q1
SNVS484G –JANUARY 2007–REVISED APRIL 2014
www.ti.com
Typical Applications (continued)
Figure 20. Boost
8.2.4 24-V SEPIC
The 24-V SEPIC converter (Figure 21) utilizes the internal voltage reference for the regulation setpoint. The
output is 24 V at 250 mA while the input voltage can vary from 16 V to 48 V. The switching frequency is set to
250 kHz. The internal VCC regulator provides 6.9 V bias power for the LM5001. An auxiliary voltage can be
created by adding a winding on L2 and a diode into the VCC pin.
Figure 21. 24-V SEPIC
8.2.5 12-V Automotive SEPIC
The 12-V Automotive SEPIC converter (Figure 22) utilizes the internal bandgap voltage reference for the
regulation setpoint. The output is 12 V at 50 mA while the input voltage can vary from 3.1 V to 60 V. The output
current rating can be increased if the minimum VIN voltage requirement is increased. The switching frequency is
set to 750 kHz. The internal VCC regulator provides 6.9 V bias power for the LM5001. The output voltage can be
used as an auxiliary voltage if the nominal VIN voltage is greater than 12 V by adding a diode from the output
into the VCC pin. In this configuration, the minimum input voltage must be greater than 12 V to prevent the
internal VCC to VIN diode from conducting. If the applied VCC voltage exceeds the minimum VIN voltage, then
an external blocking diode is required between the VIN pin and the power source to block current flow from VCC
to the input supply.
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