RC5042 RAYTHEON | Alldatasheet
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Technical content
Features
+ 85% efficiency * 16 pin SOIC package + 3S0,A quiescent current in shutdown + Meets Intel VRM specification + 4 Bit DAC for voltage selection * On-board Power Good function it * Over-Voltage Protection Applications * Output voltage range from 2.1V to 3.5V + Programmable power supply for Pentium Pro™ based * Factory trimmed zero TC reference voltage CPU motherboards + Adjustable oscillator frequency to IMHz + VRM module for Pentium Pro™ CPU * Drives N-Channel MOSFETs * Programmable power supply Description . ‘The RCS042 is a non-synchronous DC-DC controller IC DAC, the RC5042 can generate accurate output voltages g 3 to 3.5V) for Pentium Pro™ CPU power. The RC5042 with Power Good function constantly monitors the output voltage [Eas the proper applications circuitry can be used to deliver load and produces a low-going interrupt signal to the Pentium Pro current greater than 12 Amps. The RCS042 is designed to CPU in the event of a out-of-tolerance voltage situation, operate in a standard PWM control mode under heavy load _thereby protecting the CPU. The programmable oscillator conditions and as a PFM controller in light load conditions. can operate from 200KHz to greater than 1MHz to provide Its highly accurate zero TC reference eliminates the need for _for flexibility in choosing external components such as precision external components in order to achieve tight toler- inductors, capacitors, and Power MOSFETs. ance voltage regulation. Through the use of the on-board Block Diagram f=}— , | 7 [> Fy ists ; [> DIGITAL .‘ v CONTROL, REF 46 v GOOD Pet essoizot
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@™ 7597360 00130413 936 Rev. 0.9.0 PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are based 4-55 ‘on design goals and limited characterization. They may change without notice. Contact Raytheon for current information.
PRODUCT SPECIFICATION RCSO42, Pin Assignments CEXT cyt 160 VIDO PWRGOOD cry2 15D ViO1 FB COS 14D vin2 vee cma 13h ving VCCA COS 120 VREF vecD a6 111 GNDA GNOP C7 10 GNDD HIDRV COr{s sg} vecaP womoerce Pin Definitions = [Pisname | Pin Number | Pin Function Description 3° External Capacitor for setting oscillator frequency ts (PWRGOOD | 2 _| Anopen collector. Logic HIGH indicated power is within limits | | 8 | Curent Fedack input foto Fences rot | = CL YCCA [5 _| Analog CC © [yeco [6 _| Digital voc we fonop | 7 __| Power ground for high current drivers < s[hiprav [8 _| Highside FET driver output m= fvecar | 9 __| VCC for High side FET output driver Br [eno [10 | Digi ground Be [anon [11 Analog ground @ bvacr | 12 | Reoronce vonage output £ Vi03-viD0_ | —_13-16 _| Voltage identification code input -— . == Absolute Maximum Ratings @ (beyond which the device may be damaged)* ts Q [ Peano ——eretons nin [tye _[ tix] unis] Tapa Vota ee a High FET Driver Supaly a Junction Tempetature ee oa Lead Seiderng Temperature [ioseconds [|| ato 20] Notes: 1. Functional operation under any of these conditions is NOT implied. “se Me 7597360 OOLO4L4 872
RC5042 PRODUCT SPECIFICATION Operating Conditions [Parameter —*[eondtions [in| typ] Max] Unite | [Woo [Suppvorse [Cid a Ts | [WeooP | Diver SuppiyVotpe | —=SC~C~sCiS*dSC(i Cw | [Win [TnoutVotage.togcniGH [—SSCSC~d S| [Vu [input Votage.togetow [| dT ST | (Vcc = SV, Vocap = 12V, fosc = 650 KHz, and TA = +25°C unless otherwise noted. Refer to Figure 1. Serer frawttowe | TL TY Table, TA = 0-70°C a [SetPontAccuracy [uoan=ta—SSSSC~wSCSC~‘idt (| [| frome | Wiad = O50 TOA Ce Line Regulation Input Voltage = 4.75 to 5.25V, Ri 33 lioad = 10A (See Figure 1) EE ee en Ta=0-700 bese gee es [PowerDispaion | SSCSCSC~S~sSSCSC*dS(C PW [ouputGurentOwver | —SSSSSCSCSCSC~C~w OB nC Notes: 1. Output Voltage Accuracy, Tempco, Load Regulation, Line Regulation, Ripple, &Transient Performance determine the Cumulative Accuracy. Ta = +25°C unless otherwise noted). Refer to Figure 1. [Parameter in Typ Tax Tits Response Time Sleep-to-Full Load fF | to [| | os | a a [Oscllator Frequency Precision Tt Maximum Duty Cycle in PWM Mode [9 | 3 | | % | Minimum Duty Cycle in PFM Mode [ff 00 | ors | | Shor Circuit Detection Comparator Threshold | 80 | t00 || mv | Short Circuit Protection/Coi Saturation Detection, reanso=SmQ || 20 [A | | Short Circult Current Foldback,reense= Sma | Tt | Response Time to MAX and Short Circuit Protection || 18 | 80 [ns | [Soft Start during Power-Up and Power-Down Tt Ts | Notes: a 1, Guaranteed by characterization, not tested 100%. M@™ 7597360 OOLO4LS 705 mm “7
PRODUCT SPECIFICATION C5042 Voltage Identification Codes Set Point | Total Room Temperature | Total System [ vios [ via | viot | vibo | (amv) Accuracy! (mV) Accuracy? (tmV) a ON A FR Oe | | Pao fa a ea eae pa foya fo, as [a es pa popotat ee [ow Pt fa fo fof of a Pow Pet Spota yet eee eo O Pope of 2a ees ea B® oft fof of sry stot 2 pope tts [sa pe Pe te we Pope tt to fT es Pete tes [= eg OO r Lopototot ss [ao Tw as Notes: —_ 1. includes set point accuracy + line reg + load reg + transient (¢mV). > 2. Includes temperature effects to total accuracy (mV). i a “58 MH 7597360 OO1041b b4YS mm
4 MBRB1545CT 660uF
Figure 1. Standard Test or Application Schematic Table 1. Components for RC5042
PRODUCT SPECIFICATION RC5042
Ordering Information
[ProductNumber [Package [JA | [Resor | Tepnsoie | arcw | 4 | L— | £ | ° : i Fe a 4-60 @® 7597360 0010418 416 |