FAN2103_08 FAIRCHILD [Fairchild Semiconductor], FAN2103_08 Datasheet - Page 3

• Manufacturer Part Number: FAN2103_08
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2007 Fairchild Semiconductor Corporation
FAN2103 Rev. 1.0.5
Pin Configuration
Pin Definitions
P3, 21-23
P1, 6-12
P2, 2-5
Pin
13
14
15
16
17
18
19
20
24
25
1
PGOOD
Name
COMP
PGND
AGND
RAMP
BOOT
VCC
R(T)
ILIM
SW
VIN
EN
NC
FB
Description
Switching Node.
Power Input Voltage. Connect to the main input power source.
Power Ground. Power return and Q2 source.
High-side Drive BOOT Voltage. Connect through capacitor (C
an internal synchronous bootstrap diode to recharge the capacitor on this pin to V
SW is LOW.
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.
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.
Input Bias Supply for IC. The IC’s logic and analog circuitry are powered from this pin.
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.
Current Limit. A resistor (R
limit trip threshold lower than the default setting.
Oscillator Frequency. A resistor (R
frequency.
Output Voltage Feedback. Connect through a resistor divider to the output voltage.
Compensation. Error amplifier output. Connect the external compensation network
between this pin and FB.
No Connect. This pin is not used.
Ramp Amplitude. A resistor (R
amplitude and provides voltage feedforward functionality.
Figure 3. MLP 5x6mm Pin Configuration (Bottom View)
ILIM
) from this pin to AGND can be used to program the current-
RAMP
3
) connected from this pin to VIN sets the ramp
T
) from this pin to AGND sets the PWM switching
BOOT
) to SW. The IC includes
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CC
when