TPS54061_15 Datasheet, PDF (1/39 Pages) Texas Instruments – TPS54061 Wide Input 60-V, 200-mA Synchronous Step-Down DC-DC Converter With Low IQ

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TPS54061
SLVSBB7E – MAY 2012 – REVISED NOVEMBER 2015
TPS54061 Wide Input 60-V, 200-mA Synchronous Step-Down DC-DC
Converter With Low IQ
1 Features
•1 Integrated High-Side and Low-Side MOSFET
• Diode Emulation for Improved Light Load
Efficiency
• Peak Current Mode Control
• 90-µA Operating Quiescent Current
• 1.4-µA Shutdown Supply Current
• 50-kHz to 1100-kHz Adjustable Switching
Frequency
• Synchronizes to External Clock
• Internal Slow-Start
• 0.8 V ±1% Voltage Reference
• Stable With Ceramic Output Capacitors or Low-
Cost Aluminum Electrolytic
• Cycle-by-Cycle Current Limit, Thermal, OVP and
Frequency Foldback Protection
• VSON-8 Package, 3 mm × 3 mm With Thermal
Pad
• –40°C to 150°C Operating Junction Temperature
2 Applications
• 4 to 20-mA Current-Loop Powered Sensors
• Low Power Standby or Bias Voltage Supplies
• Industrial Process Control, Metering, and Security
Systems
• High Efficiency Replacement for High Voltage
Linear Regulators
3 Description
The TPS54061 device is a 60-V, 200-mA,
synchronous step-down DC-DC 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 90 µA. Using the enable pin,
shutdown supply current is reduced to 1.4 µA.
To increase light load efficiency the low-side
MOSFET emulates a diode when the inductor current
reaches zero.
Under voltage lockout is internally set at 4.5 V, but
can be increased using two resistors on the enable
pin. The output voltage startup ramp is controlled by
the internal slow-start time.
The 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.
The TPS54061 enables small designs by integrating
the MOSFETs, boot recharge diode, and minimizing
the IC footprint with a small 3.00 mm x 3.00 mm
thermally enhanced VSON package
The TPS54061 is supported in the WEBENCH™
Designer at www.ti.com.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS54061
VSON (8)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VIN
VIN
BOOT
TPS54061
EN
PH
VOUT
RT /CLK
VSNS
COMP
GND
PowerPAD
Efficiency vs Load Current
100
V_IN = 12 V
90
80
70
60
50
40
30
20
10
0
0.001
V_OUT = 5 V, f_SW = 50 kHz
V_OUT = 5 V, f_SW = 400 kHz
V_OUT = 3.3 V, f_SW = 400 kHz
0.010
Load Current (A)
0.100
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.