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PTH04000WAZ1 Datasheet

  • PTH04000WAZ1

  • 3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR

  • 20頁

  • TI

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PTH04000W
www.ti.com
SLTS247A 鈥?JUNE 2005 鈥?REVISED JULY 2005
3-A, 3.3/5-V INPUT, ADJUSTABLE SWITCHING REGULATOR
WITH AUTO-TRACK鈩?SEQUENCING
FEATURES
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Up to 3-A Output Current at 85擄C
3.3-V / 5-V Input Voltage
Wide-Output Voltage Adjust
(0.9 V to 3.6 V)
Efficiencies Up To 94%
On/Off Inhibit
Undervoltage Lockout (UVLO)
Output Overcurrent Protection
(Nonlatching, Auto-Reset)
Overtemperature Protection
Ambient Temperature Range: 鈥?0擄C to 85擄C
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Surface Mount Package
Safety Agency Approvals:
UL/CUL 60950, EN60950 VDE (Pending)
Point-of-Load Alliance (POLA鈩? Compatible
APPLICATIONS
Telecommunications, Instrumentation,
and General-Purpose Circuits
DESCRIPTION
The PTH04000W is a highly integrated, low-cost switching regulator module that delivers up to 3 A of output
current. Occupying a small PCB area, the PTH04000W provides output current at a high efficiency and with
minimal power dissipation, thereby eliminating the need for a heat sink. Their small size (0.75 inch 脳 0.5 inch),
high efficiency, and low cost makes these modules practical for a variety of applications.
The input voltage range of the PTH04000W is from 3 V to 5.5 V, allowing operation from either a 3.3-V or 5-V
input bus. Using state-of-the-art switched-mode power-conversion technology, the PTH04000W can step down to
voltages as low as 0.9 V from a 5-V input bus, with typically less than 1 W of power dissipation. The output
voltage can be adjusted to any voltage over the range, 0.9 V to 3.6 V, using a single external resistor. This series
includes Auto-Track鈩?sequencing. This feature simplifies the task of supply voltage sequencing in a power
system by enabling modules to track each other, or any external voltage, during power up and power down.
Other operating features include an undervoltage lockout (UVLO), on/off inhibit, output overcurrent protection,
and overtemperature protection. Target applications include telecommunications, test and measurement
applications, and high-end consumer products. The modules are available in both through-hole and sur-
face-mount package options, including tape and reel. The PTH04000W is also compatible with TI's roadmap for
RoHS and lead-free compliance.
STANDARD APPLICATION
Track
1
2
6
V
O
V
I
C
I
*
47
碌
F
(Required)
3
4
PTH04000W
(Top View)
5
R
SET
#
1%, 0.1 W
(Required)
+
C
O
*
47
碌
F
(Optional)
Inhibit
GND
* See the Application Information section for capacitor recommendations.
# See the Application Information section for R
SET
values.
GND
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.
POLA, Auto-Track, TMS320 are trademarks of Texas Instruments.
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 2005, Texas Instruments Incorporated

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