PTB78560A Datasheet, PDF (2/29 Pages) Texas Instruments – 30-W, 24-V/48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK SEQUENCING

PTB78560A, PTB78560B
PTB78560C
SLTS249 – JUNE 2005
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device
placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
+V_I
C_I ^$
(Required)
−V_I
Typical Circuit
Track ⁵
PTB78560x
1
+V_I
2 _PEN
* _+Sense ⁹
{ _{VO Seq} 11
V_O Bus ¹⁰
V_O Adjust 8
3 _NEN
V_O COM ⁶
4
7
−Sense
* See note
C_O ^#
(Required)
R_SET ^}
{ _{VO Seq}
(3.3 V)
Track
V_I
Auto −Track
POL Module
V_O
GND Adjust
C_I ^#
RSET
V_POL1
C_O
−V_I
Simultaneous Powerup
{ _VOSeq
V_POL1
V_POL2
To Other
POL Modules
Track
V_I
Auto −Track
POL Module
V_O
GND Adjust
C_I ^#
R_SET
V_POL2
C_O
Notes:
{ Sequenced output is available in the PTB78560B model only.
*
}
The +Sense may be connected to either V_OSeq or V_OBus output of the PTB78560B.
R_SET is required to set the output voltage higher than the minimum value. See the Application
Information
section
for
values.
# _{The PTB78560x modules require a minimum of 220 µF total output capacitance for proper operation.}
$ _{A minimum of 100 µF input capacitance is recommended for proper operation.}
2