PDT006A0X3-SRZ Datasheet, PDF (14/39 Pages) Lineage Power Corporation – 6A Digital Pico DLynxTM: Non-Isolated DC-DC Power Modules 3Vdc ––14.4Vdc input; 0.45Vdc to 5.5Vdc output; 6A Output Current

Preliminary Data Sheet
October 17, 2011
6A Digital Pico DLynx^TM: Non-isolated DC-DC Power Modules
3 –– 14.4Vdc input; 0.45Vdc to 5.5Vdc output; 6A output current
Analog Feature Descriptions
Remote On/Off
The module can be turned ON and OFF either by using
the ON/OFF pin (Analog interface) or through the
PMBus interface (Digital). The module can be
configured in a number of ways through the PMBus
interface to react to the two ON/OFF inputs:
• Module ON/OFF can be controlled only
through the analog interface (digital interface
ON/OFF commands are ignored)
• Module ON/OFF can be controlled only
through the PMBus interface (analog interface
is ignored)
• Module ON/OFF can be controlled by either
the analog or digital interface
The default state of the module (as shipped from the
factory) is to be controlled by the analog interface only. If
the digital interface is to be enabled, or the module is to
be controlled only through the digital interface, this
change must be made through the PMBus. These
changes can be made and written to non-volatile
memory on the module so that it is remembered for
subsequent use.
Analog On/Off
The 6A Digital Pico DLynx^TM power modules feature an
On/Off pin for remote On/Off operation. Two On/Off
logic options are available. In the Positive Logic On/Off
option, (device code suffix ““4”” –– see Ordering
Information), the module turns ON during a logic High on
the On/Off pin and turns OFF during a logic Low. With
the Negative Logic On/Off option, (no device code suffix,
see Ordering Information), the module turns OFF during
logic High and ON during logic Low. The On/Off signal
should be always referenced to ground. For either
On/Off logic option, leaving the On/Off pin disconnected
will turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for
using the On/Off pin is shown in Figure 39. When the
external transistor Q2 is in the OFF state, the internal
transistor Q1 is turned ON, and the internal PWM
#Enable signal is pulled low causing the module to be
ON. When transistor Q2 is turned ON, the On/Off pin is
pulled low and the module is OFF. A suggested value
for Rpullup is 20kΩ.
For negative logic On/Off modules, the circuit
configuration is shown in Fig. 40. The On/Off pin should
be pulled high with an external pull-up resistor
(suggested value for the 3V to 14V input range is
20Kohms). When transistor Q2 is in the OFF state, the
On/Off pin is pulled high, transistor Q1 is turned ON and
the module is OFF. To turn the module ON, Q2 is turned
ON pulling the On/Off pin low, turning transistor Q1 OFF
resulting in the PWM Enable pin going high.
Digital On/Off
Please see the Digital Feature Descriptions section.
DLYNX MODULE
+VIN
+3.3V
Rpullup
ION/OFF
22K
+
Q2
VON/OFF
_
GND
10K
ENABLE
Q1
22K
Figure 39. Circuit configuration for using positive
On/Off logic.
DLYNX MODULE
+VIN
+3.3V
Rpullup
ION/OFF
+
Q2
VON/OFF
10K
ENABLE
22K
Q1
22K
_
GND
Figure 40. Circuit configuration for using negative
On/Off logic.
Monotonic Start-up and Shutdown
The module has monotonic start-up and shutdown
behavior for any combination of rated input voltage,
output current and operating temperature range.
Startup into Pre-biased Output
The module can start into a prebiased output as long as
the prebias voltage is 0.5V less than the set output
voltage.
Analog Output Voltage Programming
The output voltage of the module is programmable to
any voltage from 0.6dc to 5.5Vdc by connecting a
resistor between the Trim and SIG_GND pins of the
module. Certain restrictions apply on the output voltage
set point depending on the input voltage. These are
shown in the Output Voltage vs. Input Voltage Set Point
Area plot in Fig. 41. The Upper Limit curve shows that
for output voltages lower than 1V, the input voltage must
be lower than the maximum of 14.4V. The Lower Limit
curve shows that for output voltages higher than 0.6V,
the input voltage needs to be larger than the minimum of
3V.
LINEAGE POWER
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