TPS61045_17 Datasheet, PDF (1/26 Pages) Texas Instruments – Digitally Adjustable Boost Converter

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TPS61045
SLVS440C – JANUARY 2003 – REVISED DECEMBER 2014
TPS61045 Digitally Adjustable Boost Converter
1 Features
•1 Input Voltage Range from 1.8 to 6 V
• Output Voltage of up to 28 V Possible
• Up to 85% Efficiency
• Digitally Adjustable Output Voltage Control
• Disconnects Output From Input During Shutdown
• Switching Frequency up to 1 MHz
• No Load Quiescent Current 40 μA Typical
• Thermal Shutdown Mode
• Shutdown Current 0.1 μA Typical
• Available in Small 3-mm × 3-mm VSON Package
2 Applications
• LCD Bias Supply for Small to Medium LCD
Displays
• OLED Display Power Supply
– PDA, Pocket PC, Smart Phones
– Handheld Devices
– Cellular Phones
3 Description
The TPS61045 device is a high-frequency boost
converter with digitally-programmable output voltage
and true shutdown. During shutdown, the output is
disconnected from the input by opening the internal
input switch. This allows a controlled power-up and
power-down sequencing of the display. The output
voltage can be increased or decreased in digital
steps by applying a logic signal to the CTRL pin. The
output voltage range, as well as the output voltage
step size, can be programmed with the feedback
divider network. With a high switching frequency of
up to 1 MHz, the TPS61045 device allows the use of
small external components, and together, with the
small 8-pin VSON package, a minimum system
solution size is achieved.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
TPS61045
VSON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_IN = 1.8 V to 6 V
C1
100 nF
Simplified Schematic
L1
4.7 mH
D1
MBR0530
C2
4.7mF
1L
SW ⁸
2 _VIN
DO ³
5 _CTRL
4
FB
6 _{GND PGND} 7
TPS61045
R1
2.2 MW
R3
1 MW
R2
180 kW
V_O
16.2 V to 18.9 V/ 10 mA
Cff
22 pF
C3
1 mF
Enable / LCD bias control
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.