TPS61086_15 Datasheet, PDF (1/30 Pages) Texas Instruments – TPS61086 18.5-V PFM – PWM Step-Up DC – DC Converter With 2.0-A Switch

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TPS61086
SLVSA05B – AUGUST 2009 – REVISED AUGUST 2015
TPS61086 18.5-V PFM – PWM Step-Up DC – DC Converter With 2.0-A Switch
1 Features
• 2.3-V to 6.0-V Input Voltage Range
• 18.5-V Boost Converter With 2.0-A Switch Current
• 1.2-MHz Switching Frequency
• Power Save Mode for Improved Efficiency at Low-
Output Power or Forced PWM
• Adjustable Soft-Start
• Thermal Shutdown
• Undervoltage Lockout
• 10-Pin VSON Package
2 Applications
• Handheld Devices
• GPS Receivers
• Digital Still Cameras
• Portable Applications
• DSL Modems
• PCMCIA Cards
• TFT LCD Bias Supply
1
3 Description
The TPS61086 device is a high-frequency, high-
efficiency DC-to-DC converter with an integrated 2.0-
A, 0.13-Ω power switch capable of providing an
output voltage up to 18.5 V. The implemented boost
converter is based on a fixed frequency of 1.2-MHz,
pulse-width-modulation (PWM) controller that allows
the use of small external inductors and capacitors
and provides fast transient response.
At light-load, the device can operate in Power Save
Mode with pulse-frequency-modulation (PFM) to
improve the efficiency while keeping a low-output
voltage ripple. For very noise-sensitive applications,
the device can be forced to PWM Mode operation
over the entire load range by pulling the MODE pin
high. The external compensation allows optimizing
the application for specific conditions. A capacitor
connected to the soft-start pin minimizes inrush
current at start-up.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61086
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
L
3.3 mH
V_IN
2.5 V to 6 V
Cin
10 mF
16 V
Cby
1 mF
16 V
8
IN
3
EN
SW ⁶
7
SW
9 _MODE
4 _AGND
5 _PGND
2
FB
COMP ¹
SS ¹⁰
TPS61086
D
PMEG2010AEH
R1
156 kW
Css
100 nF
Rcomp
68 kW
Ccomp
820 pF
R2
18 kW
V_S
12 V
Cout
2* 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.