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PTN78000W Datasheet

  • PTN78000W

  • 1.5-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR

  • 20頁

  • TI

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PTN78000W
www.ti.com
SLTS230 鈥?NOVEMBER 2004
1.5-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR
FEATURES
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1.5-A Output Current
Wide-Input Voltage
(7 V to 36 V)
Wide-Output Voltage Adjust
(2.5 V to 12.6 V)
High Efficiency (Up to 95%)
On/Off Inhibit
Output Current Limit
Overtemperature Shutdown
Operating Temp: 鈥?0擄C to 85擄C
Surface Mount Package
APPLICATIONS
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General-Purpose, Industrial Controls,
HVAC Systems, Test and Measurement,
Medical Instrumentation, AC/DC Adaptors,
Vehicles, Marine and Avionics
DESCRIPTION
The PTN78000W is a series of high-efficiency, step-down Integrated Switching Regulator (ISR), that represent
the third generation in the evolution of the popular 78ST100 series of products. In new designs it may be
considered in place of the 78ST100, PT78ST100, PT5100, and PT6100 series of single in-line pin (SIP)
products. The PTN78000 is smaller and lighter than its predecessors, and has either similar or improved
electrical performance characteristics. The case-less, double-sided package, also exhibits improved thermal
characteristics, and is compatible with TI's roadmap for RoHS and lead-free compliance.
Operating from a wide-input voltage range of 7 V to 36 V, the PTN78000 provides high-efficiency, step-down
voltage conversion for loads of up to 1.5 A. The output voltage is set using a single external resistor, and may be
set to any value within the range, 2.5 V to 12.6 V. The output voltage can be as little as 2 V lower than the input,
allowing operation down to 7 V, with an output voltage of 5 V.
The PTN78000 has an integral on/off inhibit, and is suited to a wide variety of general-purpose applications that
operate off 12-V, 24-V, or 28-V dc power.
STANDARD APPLICATION
1
PTN78000W
(Top View)
4
R
SET#
0.05 W, 1%
(Required)
C
O
*
100
mF
Electrolytic
(Required)
5
V
O
V
I
C
I
*
2.2
mF
Ceramic
(Required)
Inhibit
GND
2
3
GND
*See The Application Information for Capacitor Recommendation.
#R
SET
is Required to Adjust the Output Voltage Higher Than 2.5 V.
See The Application Information for Values.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 漏 2004, Texas Instruments Incorporated

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