PTB48520W Datasheet, PDF (2/18 Pages) Texas Instruments – 25-A, 48-V INPUT ISOLATED DC/DC CONVERTER WITH AUTO-TRACK™ SEQUENCING

PTB48520W
SLTS233A – NOVEMBER 2004 – REVISED APRIL 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.
Typical Circuit
Simultaneous Power Up
V1
4
Track
V2
PTB48520W
8
+Sense
+V_I
1 _+VI
10
V_OSeq
9
V_OBus
V1 = 3.3 V
2
7
V_OEnable _VOAdjust
3
V_I
2
Track
PTH03050W _VO ⁶
V2 = 1.8 V
5
V_OCOM
R_SET
887 W
Inhibit GND Adjust
−V_I
3
6
−V_I
−Sense
C1
100 mF
4
15
R1
5.49 kW
C2
100 mF
ORDERING INFORMATION
Output Voltage
1.8 V to 3.6 V
1.8 V to 3.6 V
PTB48520 (Basic Model)
Part Number
DESCRIPTION
PTB48520WAH
Horizontal T/H
PTB48520WAS
SMD, Standard ⁽²⁾
(1) See the applicable package reference drawing for the dimensions and PC board layout.
(2) Standard option specifies 63/37, Sn/Pb pin solder material.
Package Ref. ⁽¹⁾
ERP
ERQ
ABSOLUTE MAXIMUM RATINGS
UNIT
V_(Track)
I_(Track) max
T_A
Track input voltage
Track input current
Operating temperature range
Overtemperature protection
From external source
Over V_I range
PCB temperature (near pin 1)
0 V to V_O Bus + 0.3 V
10 mA ⁽¹⁾
–40°C to 85°C
115°C
T_(reflow)
T_stg
Solder reflow temperature
Storage temperature
Surface temperature of module or pins
235°C ⁽²⁾
–40°C to 125°C
(1) When the Track input is fed from an external voltage source, the input current must be limited. A 2.74-kΩ value series resistor is
recommended.
(2) During solder reflow of SMD package version, do not elevate the module PCB, pins, or internal component temperatures above a peak
of 235°C.
2