Austin LynxTM SIP Non-Isolated dc-dc Power Modules:
3.0 Vdc - 5.5 Vdc Input, 0.9 Vdc - 3.3 Vdc Output, 10 A
Data Sheet
March 28, 2008
Table 1. Austin Lynx™ Trim Values
Feature Descriptions
VO, set
Rbuffer
Remote On/Off
3.3 V
2.5 V
2.0 V
1.8 V
1.5 V
1.2 V
1.0 V
0.9 V
59 kW
78.7 kW
100 kW
100 kW
100 kW
59 kW
The Austin Lynx™ SIP power modules feature an
On/Off pin for remote On/Off operation. If not using the
remote On/Off pin, leave the pin open (module will be On).
The On/Off pin signal (Von/off) is referenced to ground. To
switch the module on and off using remote On/Off, connect
an open collector pnp transistor between the On/Off pin and
the VI pin (see Figure 20).
30.1 kW
5.11 kW
During a logic-low when the transistor is in the Off state, the
power module is On and the maximum
Note: VO, set is the typical output voltage for the unit.
Von/off generated by the module is 0.3V. The maximum
leakage current of the switch when Von/off = 0.3V and VI =
5.5V (Vswitch = 5.2V) is 10 µA. During a logic-high when the
transistor is in the active state, the power module is Off. Dur-
ing this state, Von/off = 2.5V to 5.5V and the maximum Ion/
off = 1mA.
For example, to trim-up the output voltage of 1.5V
module (AXH010A0M) by 8% to 1.62V, Rtrim-up is
calculated as follows:
ΔV
= 0.12V
out
R
= 100kΩ
buffer
24080
0.12
R
= -------------- – 100k
trim – up
VI
Ion/off
Vo
ON/OFF
R
= 100.66kΩ
trim – up
Vswitch
AXH010A0M
+
VO
GND
Von/off
RLOAD
TRIM
Rtrim-up
Figure 20. Remote On/Off Implementation.
GND
Output Voltage Set-Point Adjustment
(Trim)
Figure 21. Circuit Configuration to trim-up output
voltage.
Output voltage set-point adjustment allows the output volt-
age set point to be increased or decreased by connecting
either an external resistor or a voltage source between the
TRIM pin and either the VO pin (decrease output voltage) or
GND pin (increase output voltage).
For trim-down using an external resistor, connect Rtrim-
down between the TRIM and VOUT pins of the module
(Figure 22). The value of Rtrim-down is defined as:
V
– 0.8
out
⎛
⎝
⎞
R
=
------------------------ – 1 x30100 – R
kΩ
trim-down
buffer
⎠
For TRIM-UP using an external resistor, connect Rtrim-up
between the TRIM and GND pins (Figure 21). The value of
Rtrim-up defined as:
ΔV
out
Vout is the typical set point voltage of a module
|DVout| is the desired output voltage adjustment
Rbuffer (internal to the module) is defined in Table 3 for vari-
ous models
24080
ΔVout
Rtrim – up = ------------------ – Rbuffer
kΩ
For example, to trim-down the output voltage of 2.5 V mod-
ule (AXH010G) by 8% to 2.3V, Rtrim-down is
calculated as follows:
|DVout| is the desired output voltage set-point adjustment
Rbuffer (internal to the module) is defined in Table 1 for vari-
ous models.
ΔV
= 0.2V
out
V
= 2.5V
out
Lineage Power
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
