Datasheet

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Features of the PTH/PTV Family of Nonisolated, Wide-Output Adjust Power Modules
POLA™ Compatibility
Soft-Start Power Up
3.3V
5,6
9
7
3,4
81,210,11
C1
680 Fm
+
C3
330 Fm
+
GND
GND
1.8V
R
5.49k
1%,0.05W
SET
W
C2
22 Fm
PTV03020W
Track
V
I
V
O
GND
Sense
Adjust
GND
L
O
A
D
t-Time=5ms/div
I (5 A/div)
I
V (1V/div)
O
V (2V/div)
I
PTV03020W
SLTS243A – FEBRUARY 2005 – REVISED OCTOBER 2007
The PTH/PTV family of nonisolated, wide-output adjustable power modules from Texas Instruments are
optimized for applications that require a flexible, high-performance module that is small in size. Each of these
products are POLA™ compatible. POLA-compatible products are produced by a number of manufacturers, and
offer customers advanced, non-isolated modules with the same footprint and form factor. POLA parts are also
ensured to be interoperable, thereby providing customers with true second-source availability.
The Auto-Track feature allows the power up of multiple PTH/PTV modules to be directly controlled from the
Track pin. However, in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track
pin should be directly connected to the input voltage, V
I
(see Figure 7 ).
Figure 7. Power-Up Application Circuit
When the Track pin is connected to the input voltage, the Auto-Track function is permanently disengaged. This
allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is
under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate.
Figure 8. Power-Up Waveform
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