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TPS62260DDCTG4 Fiches technique(PDF) 4 Page - Texas Instruments

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No de pièce TPS62260DDCTG4
Description  2.25 MHz 600 mA Step Down Converter in 2x2 QFN / TSOT-23 Package
Download  32 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS62260DDCTG4 Fiches technique(HTML) 4 Page - Texas Instruments

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background image
V
IN
GND
EN
SW
FB
1
2
3
5
4
DDCPACKAGE
(TOP VIEW)
DRV PACKAGE
(TOPVIEW)
MODE
FB
GND
SW
EN
VIN
1
2
3
6
5
4
r
Po
w
e
P
A
D
Zero-Pole
Amp.
Integrator
Error Amplifier
+1% Voltagepositioning
PWM
Comp.
VREF
Control
Stage
GateDriver
Anti-
Shoot-Through
Current-
LimitComparator
Current-
LimitComparator
VREF +1%
FB
FB
VIN
GND
MODE
2.25-MHz
Oscillator
SW1
EN
V
IN
Softstart
VOUT RAMP
CONTROL
Thermal
Shutdown
.6
Reference
0
VVREF
Undervoltage
Lockout 1.8 V
Limit
HighSide
Limit
LowSide
Sawtooth
Generator
Int. Resistor
Network
FB
RI 1
RI..N
MODE
Onlyin 2x2SON
GND
PFMComparator
TPS62260, TPS62261
TPS62262, TPS62263
SLVS763D
– JUNE 2007 – REVISED FEBRUARY 2011
www.ti.com
PIN ASSIGNMENTS
TERMINAL FUNCTIONS
TERMINAL
NO.
I/O
DESCRIPTION
NO.
NAME
QFN
TSOT23-5
2x2-6
VIN
5
1
PWR
VIN power supply pin.
GND
6
2
PWR
GND supply pin
This is the enable pin of the device. Pulling this pin to low forces the device into shutdown
EN
4
3
I
mode. Pulling this pin to high enables the device. This pin must be terminated.
This is the switch pin and is connected to the internal MOSFET switches. Connect the
SW
1
5
OUT
external inductor between this terminal and the output capacitor.
Feedback Pin for the internal regulation loop. Connect the external resistor divider to this pin.
FB
3
4
I
In case of fixed output voltage option, connect this pin directly to the output capacitor
This pin is only available at QFN package option. MODE pin = high forces the device to
MODE
2
I
operate in fixed frequency PWM mode. MODE pin = low enables the Power Save Mode with
automatic transition from PFM mode to fixed frequency PWM mode.
FUNCTIONAL BLOCK DIAGRAM
4
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© 2007–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS62260 TPS62261 TPS62262 TPS62263


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