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uP6103 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 5V/12V Synchronous-Rectified Buck Controller - uPI Semiconductor

भाग संख्या uP6103
समारोह 5V/12V Synchronous-Rectified Buck Controller
मैन्युफैक्चरर्स uPI Semiconductor 
लोगो uPI Semiconductor लोगो 
पूर्व दर्शन
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uP6103 pdf
uP6103
Functional Pin Description
No. Pin Name Pin Function
Bootstrap Supply for the floating upper gate driver. Connect the bootstrap capacitor CBOOT
1
BOOT
between BOOT pin and the PHASE pin to form a bootstrap circuit. The bootstrap capacitor
provides the charge to turn on the upper MOSFET. Typical values for CBOOT range from 0.1uF to
0.47uF. Ensure that CBOOT is placed near the IC.
Upper Gate Driver Output. Connect this pin to the gate of upper MOSFET. This pin is monitored
2 UGATE by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has
turned off.
3
GND
Signal and Power Ground for the IC. All voltages levels are measured with respect to this pin.
Tie this pin to the ground island/plane through the lowest impedance connection available.
Lower Gate Driver Output. Connect this pin to the gate of lower MOSFET. This pin is monitored
4 LGATE by the adaptive shoot-through protection circuitry to determine when the lower MOSFET has turn
off.
Supply Voltage. This pin provides the bias supply for the uP6103 and the lower gate driver. The
5
VCC
supply voltage is internally regulated to 4VDD for internal control circuit. Connect a well-decoupled
4.5V to 13.2V supply voltage to this pin. Ensure that a decoupling capacitor is placed near the
IC.
Feedback Voltage. This pin is the inverting input to the error amplifier. A resistor divider from
6 FB the output to GND is used to set the regulation voltage. Use this pin in combination with the
COMP/EN pin to compensate the voltage control feedback loop of the converter.
External Reference Input for Tracking Mode Operation. This pin receives a voltage with
7
REFIN
range from 0.4V to 3.0V as the reference voltage at the non-inverting input of the error amplifier.
Pulling this pin lower than 0.3V disables the controller and causes the oscillator to stop, the
UGATE and LGATE outputs to be held low. Let this pin open for internal 0.6V reference use.
PHASE Switch Node. Connect this pin to the source of the upper MOSFET and the drain of
the lower MOSFET. This pin is used as the sink for the UGATE driver, and to monitor the voltage
8
PHASE
drop across the lower MOSFET for over current protection. This pin is also monitored by the
adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off.
A Schottky diode between this pin and ground is recommended to reduce negative transient
voltage which is common in a power supply system.
Exposed Pad
For PSOP-8 package. The exposed pad should be well soldered to PCB for effective heat
conduction. Connect the exposed pad the ground.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F00, File Name: uP6103-DS-F0000
2

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