IRDC3473 International Rectifier, IRDC3473 Datasheet - Page 2

• Manufacturer Part Number: IRDC3473
• Description: Power Management IC Development Tools 9999V 999A POL IC
• Manufacturer: International Rectifier
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of IRDC3473

• Product: Evaluation Boards
• Tool Is For Evaluation Of: IR3473
• Dimensions: 4 mm x 5 mm
• Factory Pack Quantity: 1

CONNECTIONS and OPERATING INSTRUCTIONS
LAYOUT
An input supply in the range of 8 to 19V should be connected from VIN to PGND. A maximum load
of 6A may be connected to V
inputs and outputs of the board are listed in Table 1.
IRDC3473 has two input supplies, one for biasing (VCC) and the other for input voltage (VIN).
Separate supplies should be applied to these inputs. VCC input should be a well regulated 4.5V to
5.5V supply connected to VCC and PGND. Enable (EN) is controlled by the first switch of SW1, and
FCCM option can be selected by the second switch of SW1. Toggle the switch to the ON position
(marked by a solid square) to enable switching or to select FCCM. The absolute maximum voltage
of the external signal applied to EN (TP4) and FCCM is +8V.
The PCB is a 4-layer board. All layers are 1 oz. copper. IR3473 and other components are mounted
on the top and bottom layers of the board.
The power supply decoupling capacitors, bootstrap capacitor and feedback components are located
close to IR3473. To improve efficiency, the circuit board is designed to minimize the length of the on-
board power ground current path.
Connection
VIN (TP2)
PGND (TP5)
VCC (TP16)
PGND (TP17)
VOUT (TP7)
PGND (TP10)
EN (TP4)
OUT
and PGND. The connection diagram is shown in Fig. 1, and the
Table 1. Connections
Signal Name
VIN
Ground for VIN
VCC Input
Ground for VCC Input
V
Ground for V
Enable Input
OUT
(+1.05V)
OUT
IRDC3473
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