TPS54061 Datasheet, PDF (1/36 Pages) Texas Instruments – Wide Input 60V, 200mA Synchronous Step-Down DC-DC Converter with Low IQ

TPS54061
www.ti.com
SLVSBB7A – MAY 2012 – REVISED MAY 2012
Wide Input 60V, 200mA Synchronous Step-Down DC-DC Converter with Low IQ
Check for Samples: TPS54061
FEATURES
1
•2 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 Fold Back Protection
• VSON-8 Package, 3 mm X 3 mm With Thermal
Pad
• –40°C to 150°C Operating Junction
Temperature
APPLICATIONS
• 4-20 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
SIMPLIFIED SCHEMATIC
VIN
VIN
BOOT
TPS54061
EN
PH
VOUT
RT /CLK
COMP
VSNS
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 3mm x 3mm thermally
enhanced VSON package
The TPS54061 is supported in the Webench™
Designer at www.ti.com.
100
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY
V_IN = 12 V,
F_SW = 400 kHz
V_OUT = 5 V
V_OUT = 3.3 V
0.025 0.05 0.075 0.1 0.125 0.15 0.175 0.2
Load Current (A)
GND
PowerPAD
1
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.
Webench is a trademark of Texas Instruments.
2
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