Datasheet
V =3.3V
O
0 0.5
I -OutputCurrent- A
O
95
100
Efficiency-%
V =8V
IN
V =12V
IN
V =18V
IN
90
85
80
75
70
65
60
0.25 0.75 1 1.25 1.5 1.75 2
V =15V
IN
PH
VIN
GND
BOOT
VSENSE
COMP
SS
C
SS
D1
VIN
VOUT
EN
TPS54233
C
I
C
BOOT
L
O
C
O
Ren1
R
O2
C
1
C
2
R
3
Ren2
R
O1
TPS54233
www.ti.com
SLUS859B –OCTOBER 2008– REVISED FEBRUARY 2011
2A, 28V INPUT, STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODE™
Check for Samples: TPS54233
1
FEATURES
APPLICATIONS
• Consumer Applications such as Set-Top
2
• 3.5 V to 28 V Input Voltage Range
Boxes, CPE Equipment, LCD Displays,
• Adjustable Output Voltage Down to 0.8 V
Peripherals, and Battery Chargers
• Integrated 80 mΩ High Side MOSFET Supports
• Industrial and Car Audio Power Supplies
up to 2A Continuous Output Current
• 5V, 12V and 24V Distributed Power Systems
• High Efficiency at Light Loads with a Pulse
Skipping Eco-mode™
DESCRIPTION
• Fixed 300 kHz Switching Frequency
The TPS54233 is a 28 V, 2 A non-synchronous buck
• Typical 1 μA Shutdown Quiescent Current
converter that integrates a low R
DS(on)
high side
• Adjustable Slow Start Limits Inrush Currents
MOSFET. To increase efficiency at light loads, a
pulse skipping Eco-mode™ feature is automatically
• Programmable UVLO Threshold
activated. Furthermore, the 1 μA shutdown supply
• Overvoltage Transient Protection
current allows the device to be used in battery
• Cycle by Cycle Current Limit, Frequency Fold
powered applications. Current mode control with
Back and Thermal Shutdown Protection
internal slope compensation simplifies the external
compensation calculations and reduces component
• Available in Easy-to-Use SOIC8 Package
count while allowing the use of ceramic output
• Supported by SwitcherPro™ Software Tool
capacitors. A resistor divider programs the Hysteresis
(http://focus.ti.com/docs/toolsw/folders/print/s
of the input under-voltage lockout. An overvoltage
witcherpro.html)
transient protection circuit limits voltage overshoots
during startup and transient conditions. A cycle by
• For SWIFT™ Documentation, See the TI
cycle current limit scheme, frequency fold back and
Website at www.ti.com/swift
thermal shutdown protect the device and the load in
the event of an overload condition. The TPS54233 is
available in an 8-pin SOIC package that has been
internally optimized to improve thermal performance.
SIMPLIFIED SCHEMATIC EFFICIENCY
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.
2SWIFT, Eco-mode, SwitcherPro, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
© 2008–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.