TPS54062_15 Datasheet, PDF (1/41 Pages) Texas Instruments – TPS54062 4.7-V to 60-V Input, 50-mA Synchronous Step-Down Converter With Low IQ

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TPS54062
SLVSAV1C – MAY 2011 – REVISED DECEMBER 2014
TPS54062 4.7-V to 60-V Input, 50-mA Synchronous Step-Down Converter With Low IQ
1 Features
•1 Integrated High-Side and Low-Side MOSFET
• Peak Current Mode Control
• Diode Emulation for Improved Light-Load
Efficiency
• 89 µA (typical) Operating Quiescent Current
• 100-kHz to 400-kHz Adjustable Switching
Frequency
• Synchronizes to External Clock
• Internal Slow-Start
• 0.8 V ±2% Voltage Reference
• Stable with Ceramic Output Capacitors or Low-
Cost Aluminum Electrolytic
• Cycle-by-Cycle Current Limit, Thermal and
Frequency Foldback Protection
• MSOP-8 and 3mm × 3mm VSON-8 Packages
2 Applications
• Low-Power Standby or Bias Voltage Supplies
• 4-20 mA Current-Loop Powered Sensors
• Industrial Process Control, Metering, and Security
Systems
• High Voltage Linear Regulator Replacement
3 Description
The TPS54062 device is a 60-V, 50-mA, synchronous
step-down converter with integrated high-side and
low-side MOSFETs. Current mode control provides
simple external compensation and flexible component
selection. The non-switching supply current is 89 µA.
Using the enable pin, shutdown supply current is
reduced to 1.7 µA.
Undervoltage lockout is internally set at 4.5 V, but
can be increased using the accurate enable pin
threshold. The output voltage start-up ramp is
controlled by the internal slow-start time.
Adjustable switching frequency range allows
efficiency and external component size to be
optimized. Frequency foldback and thermal shutdown
protects the part during an overload condition.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54062
MSOP (8)
VSON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
100
V_IN = 10 V
90
80
70
60
50
40
30
20
10
0
0.001
Efficiency
V_O = 5 V, fsw = 100 kHz, EN Floating
V_O = 3.3 V, fsw = 400 kHz
0.01
Output Current (A)
0.05
G000
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.