TPS61087_15 Datasheet, PDF (1/34 Pages) Texas Instruments – TPS61087 650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter With 3.2-A Switch

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TPS61087
SLVS821D – MAY 2008 – REVISED DECEMBER 2014
TPS61087 650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter With 3.2-A Switch
1 Features
•1 2.5-V to 6-V Input Voltage Range
• 18.5-V Boost Converter With 3.2-A Switch Current
• 650-kHz, 1.2-MHz Selectable Switching
Frequency
• Adjustable Soft-Start
• Thermal Shutdown
• Undervoltage Lockout
• 10-Pin QFN and Thin QFN Packages
2 Applications
• Handheld Devices
• GPS Receivers
• Digital Still Cameras
• Portable Applications
• DSL Modems
• PCMCIA Cards
• TFT LCD Bias Supply
3 Description
The TPS61087 is a high-frequency, high-efficiency
DC-DC converter with an integrated 3.2-A, 0.13-Ω
power switch capable of providing an output voltage
up to 18.5 V. The selectable frequency of 650 kHz or
1.2 MHz allows the use of small external inductors
and capacitors and provides fast transient response.
The external compensation allows optimization of the
application for specific conditions. A capacitor
connected to the soft-start pin minimizes inrush
current at startup.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61087
VSON (10)
WSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
L
3.3 mH
V_IN
2.5 V to 6 V
Cin
2* 10 mF
16 V
Cby
1 mF
16 V
8
IN
3
EN
SW ⁶
7
SW
9 _FREQ
4 _AGND
5 _PGND
2
FB
COMP ¹
SS ¹⁰
TPS61087
D
SL22
R1
200 kW
Css
100 nF
Rcomp
100 kW
Ccomp
820 pF
R2
18 kW
V_S
15 V/500 mA
Cout
4* 10 mF
25 V
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.