Programmable Synchronous DC-DC Converter Voltage Microprocessors

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Programmable Synchronous DC-DC Converter Voltage Microprocessors

Datasheet Thumbnail

Top Searches for this datasheet

RC5052
Programmable Synchronous DC-DC Converter Voltage Microprocessors
Programmable output from 1.3V 3.5V using integrated 5-bit Remote Sense Crowbar Protection Active Droop efficiency typical full load Adjustable operation from 80KHz 1MHz Integrated Power Good Enable/Soft Start functions Overvoltage protection controls external Short circuit protection with current limiting Drives N-channel MOSFETs SOIC package Meets Intel Pentium specifications using minimum number external components Dead Time Adjustable
Description
RC5052 synchronous mode DC-DC controller which provides accurate, programmable output voltage Pentium applications. RC5052 uses 5-bit converter program output voltage from 1.3V 3.5V. RC5052 uses high level integration deliver load currents excess from source with minimal external circuitry. Synchronous-mode operation offers optimum efficiency over entire specified output voltage range, internal oscillator programmed from 80KHz 1MHz additional flexibility choosing external components. on-board precision reference achieves tight tolerance voltage regulation without expensive external components. RC5052 also offers integrated functions including Power Good, Output Enable/ Soft Start over-voltage protection current limiting.
Preliminary Information
Applications
Power supply Pentium processor Programmable step-down power supply
Block Diagram
VCCA RDTA
+12V RC5052
ROSC
VCCQP HIDRV VCCP LODRV 18.9A
DIGITAL CONTROL
GNDP 10C1 1500µF, 44m,
5-BIT
1.24v REFERENCE
POWER GOOD
PWRGD
VID0 VID2 VID4 VID1 VID3
GNDA ENABLE/SS
65-5052-01
Pentium registered trademark Intel Corporation.
Rev. 0.9.7
PRELIMINARY INFORMATION describes products that full production time printing. Specifications based design goals limited characterization. They change without notice. Contact Fairchild Semiconductor current information.
RC5052
PRODUCT SPECIFICATION
Assignments
ROSC ENABLE PWRGD VCCA GNDP LODRV VCCP
65-5052-02
VID0 VID1 VID2 VID3 VID4 GNDA HIDRV VCCQP
Definitions
Preliminary Information
Number Name Function Description ROSC Oscillator Resistor Connection. Connecting external resistor this sets internal oscillator frequency. Layout this critical system performance. Application Information details.
ENABLE/ Output Enable. logic this will disable output. internal current source allows open collector. 2.5nF soft start capacitor should connected from this ground. This also doubles soft start. PWRGD Power Good Flag. open collector output that will logic output voltage within ±12% nominal output voltage setpoint. Current Feedback. Pins used, conjunction with input current feedback control loop. Layout these trace critical system performance. Application Information details. Voltage Feedback. used input voltage feedback control loop side current feedback input. Application Information details regarding correct layout. Analog VCC. Connect system supply decouple with 0.1µF ceramic capacitor. Over Voltage Protection. This triggers gate external SCR. Power Ground. Return high currents flowing (VCCP). Connect impedance ground. Side Driver. Connect this gate N-channel MOSFET synchronous operation. trace from this MOSFET gate should 0.5". Power Side Driver Fet. Connect system supply place 4.7µF Tantalum capacitor decoupling local charge storage. Power VCC. This supply high side driver. VCCQP must connected voltage least VCCA VGS,ON (MOSFET) volt. High Side Driver. Connect this gate N-channel MOSFET. trace from this MOSFET gate should 0.5". High side driver source side driver drain switching node. Together with allows sensefet implementation. This also high current return (VCCQP). Analog Ground. Return path power analog circuitry. This should connected impedance system ground plane minimize ground loops. Dead Time Adjust. This allows control over dead time external resistor. VID4 Input. logic this open collector/TTL input will enable VID3-VID0 inputs output from 2.1V 3.5V, logic will output from 1.3V 2.05V, shown Table Pullup resistors internal controller. Voltage Identification Code Inputs. These open collector/TTL compatible inputs will program output voltage over ranges specified Table Pull-up resistors internal controller.
VCCA GNDP LODRV VCCP VCCQP HIDRV GNDA VID4
17-20
VID0VID3
PRODUCT SPECIFICATION
RC5052
Absolute Maximum Ratings
Input Voltage, Supply Voltages, VCCA, VCCP, VCCQP (DC) Supply Voltage VCCQP, Charge PUMP (Vin VCCA) Voltage Identification Code Inputs, VID4-VID0 Junction Temperature, Storage Temperature Lead Soldering Temperature, seconds 150°C 150°C 300°C
Operating Conditions
Parameter Supply Voltage, VCCA Input Logic HIGH Input Logic Ambient Operating Temp Output Driver Supply, VCCQP, VCCP PWRGD threshold Conditions Min. 4.75 Typ. Max. 5.25 Units
Preliminary Information
Logic High Logic
Electrical Specifications
(VCCA VCCP VCCQP 12V, VOUT 2.8V, fosc KHz, +25°C using circuit Figure unless otherwise noted) denotes specifications which apply over full operating temperature range. Parameter Output Voltage Output Current Initial Voltage Setpoint Output Temperature Drift Line Regulation Output Ripple Output Voltage (Pentium Steady State Steady State Positive Transient (Max Load) Load Regulation (Droop) Output Voltage (Deschutes) Steady State Steady State Steady State Conditions Min. Typ. Max. Units 2.93 Spec 8.2, Spec 8.2, 0.04 18.9 Minimum ILOAD 70°C 4.75V 5.25V ILOAD Specification 0.6: 2.8V -60/+100mV, Minimum Load1 (See Table Maximum Load1 (See Table 2.834 2.74 2.67 2.90 2.806
Negative Transient (Min Load) 300MHz Pentium 300MHz Pentium ILOAD Minimum Maximum Current
Specification Rev. 0.6: 2V±60mV 266/333MHz (-60/+100mV), Minimum Load1 (See Table Maximum Load (See Table Minimum Load (266MHz 333MHz) 450MHz Deschutes Flexible Motherboard
2.01 1.94 2.05 1.90
2.06 1.99 2.10
Negative Transient (Min Load) 450MHz Deschutes Positive Transient (Max Load) Positive Transient (Max Load) Negative Transient (Min Load) Flexible Motherboard
2.10 1.87 2.13
RC5052
PRODUCT SPECIFICATION
Parameter Load Regulation (Droop) Short Circuit Detect Threshold Efficiency Output Driver Rise Fall Time Output Driver Nonoverlap Time Turn-on Response Time Oscillator Range Oscillator Frequency Maximum Duty Cycle
Conditions ILOAD Minimum Maximum Current Maximum Load Figure Adjustability Minimum Maximum Current ROSC
Min.
Typ.
Max.
Units
1000
Preliminary Information
Note: Figures illustration voltage specifications static transient mode.
Table Processor Load Slew Rate
Maximum Load Minimum Load Slew Rate 14.2A 0.2A 30A/µs Deschutes 450MHz 14.2A 40mA 20A/µs Deschutes Flexible Motherboard 18.9A 40mA 20A/µs
2.93V 2910mV 2.90V 10mV 2.834V 2.806V 2.80V 124mV
104mV
2806mV
2.72V 2.71V
2.67V
2834 2710 124mV 2910 2806 104mV
Figure Pentium Static Transient Specification Illustration (droop saves 3C1, from down capacitors)
PRODUCT SPECIFICATION
RC5052
2.13V
2.06V 10mV 2.01V 80mV 2.0V 1.99V 1.94V 1.93V
1.87V 80mV
Preliminary Information
Figure Flexible Motherboard Static Transient Specification Illustration (droop saves from down
Applications Discussion
+12V RDTA
VCCA
ROSC VCCQP
RC5052
HIDRV VCCP LODRV PWRGD
VID0 VID1 VID2 VID3 VID4 GNDP GNDA
18.9A
ENABLE/SS
10C1 1500µF, 44m,
65-5052-05
Figure Desktop Application
RC5052
PRODUCT SPECIFICATION
+12V RDTA
+12V
VCCA
ROSC VCCQP
RC5052
HIDRV VCCP LODRV PWRGD
VID0 VID1 VID2 VID3 VID4 GNDP GNDA
18.9A
Preliminary Information
ENABLE/SS
10C1 1500µF, 44m,
65-5052-06
Figure Server Application
Table Output Voltage Programming Codes
NAME VID4 VID3 VID2 VID1 VID0 NOMINAL OUTPUT VOLTAGE DACOUNT 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 NAME VID4 VID3 VID2 VID1 VID0 NOMINAL OUTPUT VOLTAGE DACOUNT
NOTE: connected OPEN
PRODUCT SPECIFICATION
RC5052
Mechanical Dimensions
Lead SOIC
Symbol Inches Min. Max. Millimeters Min. Max. Notes: Notes Dimensioning tolerancing ANSI Y14.5M-1982. include mold flash. Mold flash protrusions shall exceed .010 inch (0.25mm). length terminal soldering substrate. Terminal numbers shown reference only. dimension does include solder finish thickness. Symbol maximum number terminals.
.093 .104 .004 .012 .013 .020 .009 .013 .496 .512 .291 .299 .050 .394 .010 .016 .004 .419 .029 .050
2.35 2.65 0.10 0.30 0.33 0.51 0.23 0.32 12.60 13.00 7.40 7.60 1.27 10.00 0.25 0.40 0.10 10.65 0.75 1.27
Preliminary Information
SEATING PLANE LEAD COPLANARITY
RC5052
PRODUCT SPECIFICATION
Ordering Information
Product Number RC5052M Package Lead SOIC
Preliminary Information
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES RIGHT MAKE CHANGES WITHOUT FURTHER NOTICE PRODUCTS HEREIN IMPROVE RELIABILITY, FUNCTION DESIGN. FAIRCHILD DOES ASSUME LIABILITY ARISING APPLICATION PRODUCT CIRCUIT DESCRIBED HEREIN; NEITHER DOES CONVEY LICENSE UNDER PATENT RIGHTS, RIGHTS OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT FAIRCHILD SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
www.fairchildsemi.com 1/21/99 0.0m Stock#DS30005052 1998 Fairchild Semiconductor Corporation

Programmable Synchronous DC-DC Converter Voltage Microprocessors

Top Searches for this datasheet

Other recent searches