Datasheet

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7V SERIES REGULATOR
SW
LM5007
V
IN
BST
V
CC
SELF-BIAS
DIODE
0.01PF
0.1PF
10V
10k
30k
+
-
+
FB
REF
2.5V
SW
L
R1
R2
R
V
IN
LM5007
C
OUT
V
OUT
LM5007
SNVS252F –SEPTEMBER 2003–REVISED MARCH 2013 www.ti.com
High Voltage Bias Regulator
The LM5007 contains an internal high voltage bias regulator. The input pin (Vin) can be connected directly to line
voltages from 9 V to 75 V. To avoid supply voltage transients due to long lead inductances on the input pin (Vin
Pin 8), it is always recommended to connect low ESR ceramic chip capacitor (≊ 0.1µF) between "Vin" pin and
"RTN" pin (pin 4), located close to LM5007. The regulator is internally current limited to 10mA. Upon power up,
the regulator is enabled and sources current into an external capacitor connected to the Vcc pin. When the
voltage on the Vcc pin reaches the regulation point of 7V, the controller output is enabled.
An external auxiliary supply voltage can be applied to the Vcc pin. If the auxiliary voltage is greater than 7 V, the
internal regulator will essentially shutoff, thus reducing internal power dissipation.
Figure 2. Low Ripple Output Configuration
Figure 3. Self Biased Configuration
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Product Folder Links: LM5007