TPS54062 Datasheet, PDF (1/30 Pages) Texas Instruments – 4.7V to 60V Input, 50mA Synchronous Step-Down Converter with Low IQ

TPS54062
www.ti.com
SLVSAV1 – MAY 2011
4.7V to 60V Input, 50mA Synchronous Step-Down Converter with Low IQ
Check for Samples: TPS54062
FEATURES
1
•2 Integrated High Side and Low Side MOSFET
• Peak Current Mode Control
• 89 µA (typical) Operating Quiescent Current
• 100kHz to 400kHz Switching Frequency
• Synchronizes to External Clock
• Internal Slow Start
• 0.8V ±2% Voltage Reference
• Stable with Ceramic Output Capacitors or Low
Cost Aluminum Electrolytic
• Cycle-by-Cycle Current Limit, Thermal and
Frequency Fold Back Protection
• MSOP8 Package
APPLICATIONS
• Low Power Standby or Bias Voltage Supplies
• 4-20mA Current-Loop Powered Sensors
• Industrial Process Control, Metering, and
Security Systems
• High Voltage Linear Regulator Replacement
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SIMPLIFIED SCHEMATIC
DESCRIPTION
The TPS54062 device is a 60V, 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 89µA.
Using the enable pin, shutdown supply current is
reduced to 1.7µA.
Under voltage lockout is internally set at 4.5V, but
can be increased using the accurate enable pin
threshold. The output voltage startup ramp is
controlled by the internal slow start time.
Adjustable switching frequency range allows
efficiency and external component size to be
optimized. Frequency fold back and thermal
shutdown protects the part during an overload
condition.
EFFICIENCY
90
80
70
60
50
40
30
20
10
0
0
V_IN = 10V
V_IN = 24V
0.01
0.02
0.03
Output Current (A)
V_OUT = 3.3V
f_SW = 400kHz
0.04
0.05
G050
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.
SwitcherPro 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 © 2011, Texas Instruments Incorporated