TPS54362-Q1_15 Datasheet, PDF (1/40 Pages) Texas Instruments – TPS54362-Q1 3-A, 60-V Step-Down DC-DC Converter With Low I(q)

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TPS54362-Q1
SLVS845G – MARCH 2009 – REVISED AUGUST 2014
TPS54362-Q1 3-A, 60-V Step-Down DC-DC Converter With Low I_(q)
1 Features
2 Applications
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C5
• 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 3 A (max.)
• 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 Lockout, 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
• Thermal Shutdown During Excessive Power
Dissipation
• Switch Current-Limit Protection
• Short-Circuit and Overcurrent Protection of FET
• Junction Temperature Range: –40°C to 150°C
• 20-Pin HTSSOP PowerPAD™ Package
• Qualified for Automotive Applications
• Automotive Telematics
• Navigation Systems
• In-Dash Instrumentation
• Battery-Powered Applications
3 Description
The TPS54362-Q1 device is a step-down switch-
mode power supply with a low-power mode and a
programmable 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. Pulse-skip mode operation under no load
reduces the supply current to 65 μA. Using the
enable pin reduces the supply shutdown current to
1 μA.
An open-drain reset signal indicates when the
nominal output drops below the threshold set by an
external resistor-divider network. A soft-start
capacitor controls the output voltage start-up ramp.
The device activates an internal undervoltage
shutdown when the input supply ramps down to
2.6 V.
Frequency foldback operation protects the device
during an overload conditions on the output. The
device also has thermal shutdown protection due to
excessive power dissipation.
The B-revision has an improved leakage current
parameter, and improved discharged function while in
disable mode.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54362-Q1
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
V_(VIN)
LPM
VIN
EN
SYNC
RST
RT
VIN
Rslew
SS
VReg
BOOT
PH
TPS54362x-Q1
Cdly
VSENSE
COMP
GND
RST_TH
OV_TH
V_(Vreg)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.