FAN5066MX Fairchild Semiconductor, FAN5066MX Datasheet - Page 2

• Manufacturer Part Number: FAN5066MX
• Description: IC CTRLR DC/DC LV SYNC 20SOIC
• Manufacturer: Fairchild Semiconductor
• Type: Step-Down (Buck)r

Specifications of FAN5066MX

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.4 ~ 3.5 V
• Current - Output: 19A
• Frequency - Switching: 300kHz
• Voltage - Input: 5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Output Voltage: 0.4 V to 3.5 V
• Output Current: 19 A
• Input Voltage: 5 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: FAN5066MXTR; FAN5066MX_NL; FAN5066MX_NLTR; FAN5066MX_NLTR

FAN5066
Pin Assignments
Pin Definitions
2
Pin Number Pin Name Pin Function Description
10, 11
17-19
12
13
14
15
16
20
1
2
3
4
5
6
7
8
9
VID1-VID3 Voltage Identification Code Inputs . These open collector/TTL compatible inputs will
ENABLE
PWRGD
VCCQP
LODRV
CNTRL
HIDRV
GNDP
GNDD
GNDA
VCCA
VCCP
CEXT
VREF
VID4
VFB
IFB
Oscillator Capacitor Connection . Connecting an external capacitor to this pin sets
the internal oscillator frequency. Layout of this pin is critical to system performance.
See Application Information for details.
Output Enable . A logic LOW on this pin will disable the output. An internal pull-up
resistor allows for either open collector or TTL compatibility.
Power Good Flag . An open collector output that will be at logic LOW if the output
voltage is not within 12% of the nominal output voltage setpoint.
High Side Current Feedback . Pins 4 and 5 are used as the inputs for the current
feedback control loop. Layout of these traces is critical to system performance. See
Application Information for details.
Voltage Feedback . Pin 5 is used as the input for the voltage feedback control loop and
as the low side current feedback input. See Application Information for details regarding
correct layout.
Analog VCC . Connect to system 5V supply and decouple with a 0.1 F ceramic
capacitor.
Power VCC for low side FET driver . Connect to system 5V supply and place a 1 F
ceramic capacitor for decoupling and local charge storage.
VID4 Input . A logic 1 on this open collector/TTL input will enable the VID3–VID0 inputs
to set the output from 2.1V to 3.5V, and a logic 0 will set the output from 1.3V to 2.05V,
as shown in Table 1. Pullup resistors are internal to the controller.
Low Side FET Driver . Connect this pin to the gate of an N-channel MOSFET for
synchronous operation. The trace from this pin to the MOSFET gate should be < 0.5".
Power Ground . Return pin for high currents flowing in pins 7 and 13 (VCCP and
VCCQP). Connect to a low impedance ground.
High Side FET Driver . Connect this pin to the gate of an N-channel MOSFET. The
trace from this pin to the MOSFET gate should be < 0.5".
Power VCC . For high side FET driver. VCCQP must be connected to a voltage of at
least VCCA + V
and local charge storage. See Application Information for details
Digital Ground . Return path for digital logic. Connect to a low impedance system
ground plane to minimize ground loops.
Analog Ground . Return path for low power analog circuitry. This pin should be
connected to a low impedance system ground plane to minimize ground loops.
Voltage Control . The voltage forced on this pin determines the output voltage of the
converter.
program the output voltage of the reference over the ranges specified in Table 1.
Pull-up resistors are internal to the controller.
Reference Voltage Test Point . This pin provides access to the DAC output and should
be decoupled to ground using 0.1µF capacitor.
ENABLE
PWRGD
LODRV
GNDP
GS,ON
VCCA
VCCP
CEXT
VID4
VFB
IFB
(MOSFET), and place a 1 F ceramic capacitor for decoupling
2
3
4
5
6
7
8
9
10
1
FAN5066
15
20
19
18
17
16
14
13
12
11
VREF
VID1
VID2
VID3
CNTRL
GNDA
GNDD
VCCQP
HIDRV
GNDP
PRODUCT SPECIFICATION
REV. 2.1.4 11/13/01