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TPS65266 Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce TPS65266
Description  2.7- to 6.5-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS65266 Fiches technique(HTML) 3 Page - Texas Instruments

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BST1
PGND1
LX1
EN1
EN2
VIN1
BST2
LX2
VIN2
VIN3
LX3
Thermal Pad
BST3
EN3
PGND3
PGND2
AGND
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TPS65266
www.ti.com
SLVSCT9B – NOVEMBER 2014 – REVISED JANUARY 2015
5 Pin Configuration and Functions
RHB PACKAGE
Top View
A.
There is no electric signal down bonded to thermal pad inside IC. Exposed thermal pad must be soldered to PCB for
optimal thermal performance.
Pin Functions
PIN
DESCRIPTION
NO.
NAME
1
AGND
Analog ground pin
2
AGND
Analog ground pin
3
AGND
Analog ground pin
An open-drain output; asserts low if output voltage of bucks beyond regulation range due to thermal shutdown, over-
4
PGOOD
current, under-voltage, or ENx low.
Input voltage of converter controller and reference power supply bias. TI recommends to connect a 1-µF capacitor
5
VINQ
from the pin to analog ground and put the capacitor as near as possible to this pin.
6
FB2
Feedback Kelvin sensing pin for buck2 output voltage. Connect this pin to buck2 feedback resistor divider.
Error amplifier output and loop compensation pin for buck2. Connect a series resistor and capacitor to compensate
7
COMP2
the control loop of buck converter 2 with peak current PWM mode.
Soft-start and tracking input for buck2 converter. An internal 5.5-µA pullup current source is connected to this pin.
8
SS2
The soft-start time of buck2 can be programmed by connecting a capacitor between this pin and ground.
Boot strapped supply to the high-side floating gate driver in buck2 converter. Connect a capacitor (47 nF
9
BST2
recommended) from BST2 pin to LX2 pin.
Switching node connection to the inductor and bootstrap capacitor for buck2 converter. The voltage swing at this pin
10
LX2
is from a diode voltage below the ground up to VIN2 voltage.
Power ground connection of buck2. Connect PGND2 pin as close as practical to the (–) terminal of VIN2 input
11
PGND2
ceramic capacitor.
Input power supply for buck2. Connect VIN2 pin as close as practical to the (+) terminal of an input ceramic capacitor
12
VIN2
(10 µF suggested).
Copyright © 2014–2015, Texas Instruments Incorporated
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