PT6440 Series
6-A 5-V/3.3-V Input Adjustable
Integrated Switching Regulator
SLTS133B
Revised (1/30/2002)
Features
• 6A Output Current
• Input Voltage Range:
3.1 V to 5.5 V
• 90% Efficiency
• Adjustable Output Voltage
• Standby Function
• Short Circuit Protection
• Small Footprint (0.61 in2)
• Solderable Copper Case
6
• 8.8 10 Hours MTBF
Description
Ordering Information
Pin-Out Information
PT 6441r = 3.3 Volts
† PT 6442r = 2.5 Volts
† PT 6443r = 2.0 Volts
† PT 6444r = 1.8 Volts
† PT 6445r = 1.5 Volts
† PT 6446r = 1.2 Volts
† PT 6447r = 1.0 Volts
The PT6440 Excalibur™ power modules
are a series of high performance Integrated
Switching Regulators (ISRs), housed in a
thermally efficient solderable copper case.
These modules operate from input voltages
as low as 3.1V to produce a high-output low-
voltage power source; ideal for powering the
industry’s latest DSP and microprocessors.
The series includes standard output bus
voltages as low as 1.0VDC.
The innovative copper case construction
provides superior thermal performance in a
small footprint. Both through-hole and
surface mount pin configurations are avail-
able. The PT6440 series operating features
include external output voltage adjustment,
an On/Off inhibit, and short-circuit protection.
A 100µF input, and 330µF output capacitor
are required for proper operation.
Pin Function
1
2
3
4
5
6
7
8
9
Inhibit *
Vin
Vin
Vin
GND
GND
GND
GND
Vout
† 3.3V Input Bus Capable
PT Series Suffix
(PT1234x)
10 Vout
11 Vout
12 Vout Adj *
Case/Pin
Configuration
O rder
Suffix
Package
Code *
Vertical
Horizontal
SMD
N
A
C
(EPH)
(EPJ)
(EPK)
*
For further information, see
application notes.
* Previously known as package styles 1540/50.
(Reference the applicable package code drawing
for the dimensions and PC board layout)
Standard Application
VO(ADJ)
12
+VIN
+VOUT
2,3,4
9,10,11
PT6440
+
+
1
5,6,7,8
CIN
COUT
INH
GND
GND
Cin = Required 100µF electrolytic
Cout = Required 330µF electrolytic
For technical support and more information, see inside back cover or visit www.ti.com