FAN5066MX

FAN5066MX Datasheet

FAN5066

Part	Datasheet
FAN5066MX	FAN5066MX (pdf)

Related Parts	Information
FAN5066M	FAN5066M

PDF Datasheet Preview
FAN5066 Ultra Low Voltage Synchronous DC-DC Controller • Output adjustable from 400mV to 3.5V • Synchronous • Adjustable operation from 80KHz to 1MHz • Integrated Power Good and Enable functions • Overvoltage protection • Overcurrent protection • Drives N-channel MOSFETs • 20 pin SOIC or TSSOP package • Power supply DDR SDRAM VTT • Power Supply HSTL • Power Supply for ASICs • Adjustable ultra-low voltage step-down power supply The FAN5066 is a synchronous mode DC-DC controller IC which provides an adjustable output voltage for ultra-low voltage applications, down to 400mV. The FAN5066 uses a high level of integration to deliver load currents in excess of 19A from a 5V source with minimal external circuitry. Synchronous-mode operation offers optimum over the entire output voltage range, and the internal oscillator can be programmed from 80KHz to 1MHz for additional in choosing external components. The FAN5066 also offers integrated functions including a four-bit DAC-controlled reference, Power Good, Output Enable, over-voltage protection and current limiting. Block Diagram 1 OSC +12V FAN5066 16 CNTRL DIGITAL CONTROL VREF 20 4-BIT DAC 1.24V REFERENCE 19 18 17 8 VID2 VID4 VID1 VID3 2 ENABLE POWER GOOD 3 PWRGD PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are based on design goals and limited characterization. They may change without notice. Contact Fairchild Semiconductor for current informationR. EV. 11/13/01 FAN5066 PRODUCT SPECIFICATION Pin Assignments CEXT ENABLE PWRGD IFB VFB VCCA VCCP VID4 LODRV GNDP 5 FAN5066 16 VREF VID1 VID2 VID3 CNTRL GNDA GNDD VCCQP HIDRV GNDP Pin Number Pin Name Pin Function Description CEXT 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. ENABLE 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. PWRGD 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. IFB 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. VFB 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 Ordering Information Product Number FAN5066M FAN5066MTC FAN5066MTCX Package 20 pin SOIC 20 pin TSSOP 20 pin TSSOP PRODUCT SPECIFICATION DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, or c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 11/13/01 0.0m 001 Stock#DS30005066 2001 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FAN5066

Ultra Low Voltage Synchronous DC-DC Controller
• Output adjustable from 400mV to 3.5V
• Synchronous
• Adjustable operation from 80KHz to 1MHz
• Integrated Power Good and Enable functions
• Overvoltage protection
• Overcurrent protection
• Drives N-channel MOSFETs
• 20 pin SOIC or TSSOP package
• Power supply DDR SDRAM VTT
• Power Supply HSTL
• Power Supply for ASICs
• Adjustable ultra-low voltage step-down power supply

The FAN5066 is a synchronous mode DC-DC controller IC which provides an adjustable output voltage for ultra-low voltage applications, down to 400mV. The FAN5066 uses a high level of integration to deliver load currents in excess of 19A from a 5V source with minimal external circuitry. Synchronous-mode operation offers optimum over the entire output voltage range, and the internal oscillator can be programmed from 80KHz to 1MHz for additional in choosing external components. The FAN5066 also offers integrated functions including a four-bit DAC-controlled reference, Power Good, Output Enable, over-voltage protection and current limiting.

Block Diagram
1 OSC
+12V

FAN5066
16 CNTRL

DIGITAL

CONTROL

VREF 20
4-BIT DAC
1.24V REFERENCE
19 18 17 8

VID2 VID4 VID1 VID3
2 ENABLE

POWER GOOD
3 PWRGD

PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are based on design goals and limited characterization. They may change without notice. Contact Fairchild Semiconductor for current informationR. EV. 11/13/01

FAN5066

PRODUCT SPECIFICATION

Pin Assignments

CEXT ENABLE PWRGD

IFB VFB VCCA VCCP VID4 LODRV GNDP
5 FAN5066 16

VREF VID1 VID2 VID3 CNTRL GNDA GNDD VCCQP HIDRV GNDP

Pin Number Pin Name Pin Function Description

CEXT 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.

ENABLE 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.

PWRGD 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.

IFB 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.

VFB 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
Ordering Information

Product Number FAN5066M FAN5066MTC FAN5066MTCX

Package 20 pin SOIC 20 pin TSSOP 20 pin TSSOP

PRODUCT SPECIFICATION

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, or c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.

A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
11/13/01 0.0m 001 Stock#DS30005066 2001 Fairchild Semiconductor Corporation

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Datasheet ID: FAN5066MX 513908