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TPS61085 Datasheet(PDF) 9 Page - Texas Instruments

Part # TPS61085
Description  TPS61085 650-kHz,1.2-MHz, 18.5-V Step-Up DC-DC Converter
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS61085 Datasheet(HTML) 9 Page - Texas Instruments

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C
SS
100 nF
C
OUT
1
4
5
6
3
2
7
TPS61085
8
L
3.3 H
µ
V
3.3 V ±20%
IN
C
10 F
16 V
IN
µ
C
1 F
16 V
BY
µ
IN
EN
FREQ
GND
SW
FB
COMP
SS
D
PMEG2010AEH
V
12 V/600 mA max
S
R1
158 k
R2
18.2 k
2* 10 µF
25 V
R
47 k
COMP
C
1.6 nF
COMP
TPS61085
www.ti.com
SLVS859B – JUNE 2008 – REVISED DECEMBER 2014
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The TPS61085 is designed for output voltages up to 18.5 V with a switch peak current limit of 2.0 A minimum.
The device, which operates in a current mode scheme with quasi-constant frequency, is externally compensated
for maximum flexibility and stability. The switching frequency is selectable between 650 kHz and 1.2 MHz, and
the input voltage range is 2.3 V to 6.0V. To control the inrush current at start-up a soft-start pin is available. The
following section provides a step-by-step design approach for configuring the TPS61085 as a voltage regulating
boost converter.
9.2 Typical Application
Figure 8. Typical Application, 3.3 V to 12 V (fS = 1.2 MHz)
9.2.1 Design Requirements
Table 2. TPS61085 12V Output Design Requirements
PARAMETERS
VALUES
Input Voltage
3.3V ± 20%
Output Voltage
12V
Output Current
600mA
Switching Frequency
1.2MHz
Copyright © 2008–2014, Texas Instruments Incorporated
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