TPS62260 Datasheet, PDF (4/32 Pages) Texas Instruments – 2.25 MHz 600 mA Step Down Converter in 2x2SON/TSOT-23 Package

TPS62260, TPS62261, TPS62262
SLVS763 – JUNE 2007
PIN ASSIGNMENTS
DDC PACKAGE
(TOP VIEW)
V_{I 1}
5 SW
GND 2
EN 3
4 FB
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DRV PACKAGE
(TOP VIEW)
SW
MODE
FB
1
2
3
Power ^PAD
6
5
4
GND
VIN
EN
NAME
V_IN
GND
EN
SW
FB
MODE
TERMINAL
NO.
SON
2x2-6
NO.
TSOT23-5
5
1
6
2
4
3
1
4
3
5
2
TERMINAL FUNCTIONS
I/O
DESCRIPTION
PWR
PWR
I
OUT
I
I
VIN power supply pin.
GND supply pin
This is the enable pin of the device. Pulling this pin to low forces the device into shutdown
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
external inductor between this terminal and the output capacitor.
Feedback Pin for the internal regulation loop. Connect the external resistor divider to this pin.
In case of fixed output voltage option, connect this pin directly to the output capacitor
This pin is only available at SON package option. MODE pin = high forces the device to
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
VIN
Thermal
Shutdown
Undervoltage
Lockout 1.8V
EN
Reference
0.6V VREF
PFM Comp.
+1% Voltage positioning
FB
VREF +1%
Mode
FB
Only in 2x2SON
Softstart
VOUT RAMP
CONTROL
RI 1
Error Amp .
VREF
Integrator
FB
Zero-Pole
AMP.
MODE
PWM
Comp.
RI..N
Int. Resistor
Network
Sawtooth
Generator
2.25 MHz
Oscillator
Control
Stage
Current
Limit Comparator
VIN
Limit
High Side
Gate Driver
Anti
Shoot-Through
SW1
Limit
Low Side
Current
Limit Comparator
GND
GND
4
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