PTH08080W_14 Datasheet, PDF (1/19 Pages) Texas Instruments – 2.25-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR

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PTH08080W
SLTS235D – FEBRUARY 2005 – REVISED SEPTEMBER 2013
2.25-A, WIDE-INPUT ADJUSTABLE SWITCHING REGULATOR
Check for Samples: PTH08080W
FEATURES
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• Up to 2.25-A Output Current at 85°C
• 4.5-V to 18-V Input Voltage Range
• Wide-Output Voltage Adjust
(0.9 V to 5.5 V)
• Efficiencies Up To 93%
• On/Off Inhibit
• Undervoltage Lockout (UVLO)
• Output Overcurrent Protection
(Nonlatching, Auto-Reset)
• Overtemperature Protection
• Ambient Temperature Range: –40°C to 85°C
• Surface-Mount Package
• Safety Agency Approvals:
UL/CUL 60950, EN60950
APPLICATIONS
• Telecommunications, Instumentation,
and General-Purpose Circuits
DESCRIPTION
The PTH08080W is a highly integrated, low-cost
switching regulator module that delivers up to 2.25 A
of output current. The PTH08080W sources output
current at a much higher efficiency than a TO-220
linear regulator IC, thereby eliminating the need for a
heat sink. Its small size (0.5 × 0.6 in) and flexible
operation creates value for a variety of applications.
The input voltage range of the PTH08080W is from
4.5 V to 18 V, allowing operation from either a 5-V or
12-V input bus. Using state-of-the-art switched-mode
power-conversion technology, the PTH08080W can
step down to voltages as low as 0.9 V from a 5-V
input bus, with less than 1 W of power dissipation.
The output voltage can be adjusted to any voltage
over the range, 0.9 V to 5.5 V, using a single external
resistor. Operating features include an undervoltage
lockout (UVLO), on/off inhibit, overcurrent protection,
and overtemperature protection. Target applications
include telecommunications, test and measurement
applications, and high-end consumer products. This
product is available in both through-hole and surface-
mount package options, including tape and reel.
STANDARD APPLICATION
D1^$
Inhibit
V_I
5
4
PTH08080W
(Top View )
1
3
R_SET #
0.05 W, 1%
(Required)
+ ^{CI *}
2
100 mF
Electrolytic
GND
(Required)
* See The Capacitor Application Information
# See the Specification Table for the R_SET value.
$ Diode is Required When V_O > 5.25 V and V_I > 16 V.
C_O *
100 mF
Electrolytic
(Optional)
V_O
GND
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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 © 2005–2013, Texas Instruments Incorporated