Datasheet Texas Instruments PTV05020W — 数据表

PTV05020W www.ti.com SLTS232C – JANUARY 2005 – REVISED DECEMBER 2007 18-A, 5-V INPUT NONISOLATED WIDE-OUTPUT ADJUST SIP MODULE
FEATURES APPLICATIONS Up to 18-A Output Current 5-V Input Bus Wide-Output Voltage Adjust
(0.8 V to 3.6 V) Efficiencies up to 96% On/Off Inhibit Output Voltage Sense Prebias Start-Up Undervoltage Lockout Auto-Trackв„ў Sequencing Output Overcurrent Protection
(Nonlatching, Auto-Reset) Overtemperature Protection Operating Temperature: –40°C to 85°C Safety Agency Approvals:
UL/cUL 60950, EN60950 VDE POLAв„ў Compatible 1 2 Multivoltage Digital Systems
High-Density Logic Circuits
High-End Computers and Servers
5-V Intermediate Bus Architectures DESCRIPTION
The PTV05020W is a ready-to-use nonisolated power module, and part of a new class of complete dc/dc
switching regulators from Texas Instruments. These regulators combine high performance with double-sided,
surface-mount construction, to give designers the flexibility to power the most complex multiprocessor digital
systems using off-the-shelf catalog parts.
The PTV05020W series is produced in a 12-pin, single in-line pin (SIP) package. The SIP footprint minimizes
board space, and offers an alternate package option for space conscious applications. Operating from a 5-V
input bus, the series provides step-down conversion to a wide range of output voltages, at up to 18 A of output
current. The output voltage can be set to any value over the range, 0.8 V to 3.6 V. The output voltage is set
using a single external resistor.
This series includes Auto-Trackв„ў. Auto-Trackв„ў simplifies the task of supply-voltage sequencing in a power
system by enabling the output voltage of multiple modules to accurately track each other, or any external voltage,
during power up and power down.
Other operating features include an on/off inhibit, and the ability to start up into an existing output voltage or
prebias. For improved load regulation, an output voltage sense is provided. A nonlatching overcurrent trip and
overtemperature shutdown protects against load faults. …