TPS54362-HT_15 Datasheet, PDF (1/34 Pages) Texas Instruments – 1-A, 48-V STEP DOWN DC/DC CONVERTER WITH LOW Iq

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TPS54362-HT
SLVSBI9 – SEPTEMBER 2012
1-A, 48-V STEP DOWN DC/DC CONVERTER WITH LOW Iq
Check for Samples: TPS54362-HT
FEATURES
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•2 Withstands Transients up to 60 V With an
Operating Range of 3.6 V to 48 V
• Asynchronous Switch Mode Regulator With
External Components (L and C), Load Current
up to 1 A (Maximum)
• 0.8 V ±1.5% Voltage Reference
• 200-kHz to 2.2-MHz Switching Frequency
• High Voltage Tolerant Enable Input for ON/OFF
State
• Soft Start on Enable Cycle
• Slew Rate Control on Internal Power Switch
• External Clock Input for Synchronization
• Pulse Skip Mode (PFM) During Light Output
Loads With Quiescent Current = 65 μA Typical
(LPM Operation)
• External Compensation for Wide Bandwidth
Error Amplifier
• Internal Undervoltage Lock Out UVLO
• Programmable Reset Power on Delay
• Reset Function Filter Time for Fast Negative
Transients
• Programmable Overvoltage Output Monitoring
• Programmable Undervoltage Output
Monitoring, Issuance of Reset if Output Falls
Below Threshold
• Switch Current Limit Protection
• Short Circuit and Overcurrent Protection of
FET
• Package: 20-pin HTSSOP PowerPAD™
APPLICATIONS
• Down-hole Drilling
• High Temperature Environments
SUPPORTS EXTREME TEMPERATURE
APPLICATIONS
• Controlled Baseline
• One Assembly and Test Site
• One Fabrication Site
• Available in Extreme (–55°C to 175°C)
Temperature Range
• Extended Product Life Cycle
• Extended Product-Change Notification
• Product Traceability
• Texas Instruments' high temperature products
utilize highly optimized silicon (die) solutions
with design and process enhancements to
maximize performance over extended
temperatures.
DESCRIPTION
The TPS54362 is a step down switch mode power supply with voltage supervisor. Integrated input voltage line
feed forward topology improves line transient regulation of the voltage mode buck regulator. The regulator has a
cycle-by cycle current limit. A pulse skip mode operation under no load reduces the supply current to 65 μA.
Using the enable pin, the supply shutdown current is reduced to 1 μA.
An open drain reset signal indicates when the nominal output drops below the threshold set by an external
resistor divider network. The output voltage start up ramp is controlled by a soft start capacitor. There is an
internal undervoltage shut down which is activated when the input supply ramps down to 2.6 V.
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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.
PowerPAD is a trademark of Texas Instruments.
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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 © 2012, Texas Instruments Incorporated