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TPS61175 Datasheet(PDF) 4 Page - Texas Instruments

Part # TPS61175
Description  3-A High Voltage Boost Converter with Soft-start and Programmable Switching Frequency
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS61175 Datasheet(HTML) 4 Page - Texas Instruments

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1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW
SW
VIN
EN
SS
SYNC
AGND
PGND
PGND
PGND
NC
FREQ
FB
COMP
TSSOP 14-pin
(TOP VIEW)
TPS61175
SLVS892A – DECEMBER 2008 – REVISED OCTOBER 2010
www.ti.com
DEVICE INFORMATION
PIN ASSIGNMENTS
PIN FUNCTIONS
PIN
DESCRIPTION
I/O
NAME
NO.
VIN
3
I
The input supply pin for the IC. Connect VIN to a supply voltage between 2.9V and 18V. It is acceptable for
the voltage on the pin to be different from the boost power stage input for applications requiring voltage
beyond VIN range.
SW
1,2
I
This is the switching node of the IC. Connect SW to the switched side of the inductor.
FB
9
I
Feedback pin for positive voltage regulation. Connect to the center tap of a resistor divider to program the
output voltage.
EN
4
I
Enable pin. When the voltage of this pin falls below the enable threshold for more than 10ms, the IC turns
off.
COMP
8
O
Output of the internal transconductance error amplifier. An external RC network is connected to this pin to
compensate the regulator.
SS
5
O
Soft start programming pin. A capacitor between the SS pin and GND pin programs soft start timing. See
application section for information on how to size the SS capacitor.
FREQ
10
O
Switch frequency program pin. An external resistor is connected to this pin to set switch frequency. See
application section for information on how to size the FREQ resistor.
AGND
7
I
Signal ground of the IC
PGND
12,13,14
I
Power ground of the IC. It is connected to the source of the PWM switch.
SYNC
6
I
Switch frequency synchronous pin. Customers can use an external signal to set the IC switch frequency
between 200-kHz and 2.2-MHz. If not used, this pin should be tied to AGND as short as possbile to avoid
noise coupling.
NC
11
I
Reserved pin. Must connect this pin to ground.
Thermal Pad
The thermal pad should be soldered to the analog ground. If possible, use thermal via to connect to top and
internal ground plane layers for ideal power dissipation.
4
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Copyright © 2008–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS61175


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