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FAN2106 Fiches technique(PDF) 3 Page - Fairchild Semiconductor

No de pièce FAN2106
Description  TinyBuck 6A, 24V Input Integrated Synchronous Buck Regulator
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN2106 Fiches technique(HTML) 3 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN2106 Rev. 1.0.1
3
Pin Assignments
Figure 3. MLP 5x6mm Pin Configuration (PCB Layout View)
Pin Definitions
Pin
Name
Description
P1, 6-12
SW
Switching Node
.
P2, 2-5
PVIN
Power Input Voltage
. Connect to the main input power source.
P3, 21-23
PGND
Power Ground
. Power return and Q2 source.
1
BOOT
High-Side Drive BOOT Voltage
. Connect through capacitor (CBOOT) to SW. The IC includes
an internal synchronous bootstrap diode to recharge the capacitor on this pin to VCC when
SW is LOW.
13
PGOOD
Power-Good Flag
. An open-drain output that pulls LOW when FB is outside a ±10% range of
the reference when EN is HIGH. PGOOD does not assert HIGH until the fault latch is enabled.
14
EN
ENABLE
. Enables operation when pulled to logic HIGH or left open. Toggling EN resets the
regulator after a latched fault condition. This input has an internal pull-up when the IC is
functioning normally. When a latched fault occurs, EN is discharged by a current sink.
15
VCC
Input Bias Supply for IC
. The IC’s logic and analog circuitry are powered from this pin.
16
AGND
Analog Ground
. The signal ground for the IC. All internal control voltages are referred to this
pin. Tie this pin to the ground island/plane through the lowest impedance connection.
17
ILIM
Current Limit
. A resistor (RILIM) from this pin to AGND can be used to program the current-
limit trip threshold lower than the default setting.
18
R(T)
Oscillator Frequency
. A resistor (RT) from this pin to AGND sets the PWM switching frequency.
19
FB
Output Voltage Feedback
. Connect through a resistor divider to the output voltage.
20
COMP
Compensation
. Error amplifier output. Connect the external compensation network between
this pin and FB.
24
PWM# /
VOUT
Forced PWM / VOUT
. Connect to VOUT to enable light-load, power-saving mode of
operation. Connect to GND or leave open for PWM mode.
25
RAMP
Ramp Amplitude
. A resistor (RRAMP) connected from this pin to PVIN sets the ramp
amplitude and provides voltage feedforward functionality.


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