RT9174. Triple Linear Regulator Controllers. Features. General Description. Applications. Ordering Information RT9174. Pin Configurations
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1 Triple Linear Regulator Controllers General Description The is a triple linear regulator controller designed for motherboard application. The regulators are intended to regulate the computer system AGP (X/X) power, the.v clock power, and the.8v power for North/South Bridge core voltage and/or cache memory circuits. All controllers can drive NPN or NMOSFET pass transistor. A special scheme employing driver voltage could be higher than V DD when driving NMOSFET through the V power. The future a small SOP8 package for saving board area. It also builds in current limiting and thermal shutdown protection function. Ordering Information Note : Richtek products are : Package Type S : SOP8 Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) RoHS compliant and compatible with the current requirements of IPC/JEDEC JSTD00. Suitable for use in SnPb or Pbfree soldering processes. Features Integrated Three Linear Controllers in a SOP8 Package Driving NPN or NMOSFET Sourcing ( > 00mA) and Sinking ( > ma) Driver TriState Output Driver Low Internal 0.8V Reference Adjustable Output Voltage Setting High Output Stability V DDQ./ Automatic Changing for AGP Wide V to 8V Input Voltage Range Current Limiting and Thermal Protection RoHS Compliant and 00% Lead (Pb)Free Applications Mother Boards Power Supply Graphic Cards Pin Configurations DRI (TOP VIEW) 8 SOP8 DRI DRI Function Block Diagram OC Thermal Limit OC DRI OC DRI 0.8V.V Reference
2 Typical Application Circuit V V DDQ. / C 000uF V Q PHDN0LT K C 0nF DRI 8 DRI D N8 R8 #TYPEDET Q SD80 V O R.8V C R Q SD80 R R C V O.V Q = if >.V #TYPEDET = 0V to Q =.V #TYPEDET = Open to Q = Figure. Triple LDOs with Q for M/B Application V K V 8 DRI 0 V TTPG C8 0.0 R9 Q MMBT90 V DDQ. / Q PHDN0LT C 000uF R.K.99K C 0nF D N8 R8 DRI #TYPEDET V TTESL Q SD80 R R C R K C V TT 8.K Figure. Dual LDOs with V TTPG for VRM 8. Application
3 V O C 000uF V C 0. V Q PHDN0LT K R R8 K R9.K.V DRI 8 DRI Q PHD0LT R R.8V C Q PHD0LT R R V O V O.V C Figure. Triple LDOs Driving MOS Application Functional Pin Description Pin Name DRI DRI Pin Function Power Supply Input Regulator Driver Output Regulator Feedback Noninverting Input Power Ground Regulator Driver Output Regulator Feedback Noninverting Input Regulator Driver Output Regulator Feedback Noninverting Input
4 Absolute Maximum Ratings Input Voltage V DD 8V Feedback // 0. to 8V Driver DRI//DRI 0. to V Power Dissipation, P T A = C SOP8 0.W Package Thermal Resistance SOP8, θ JA 0 C/W Operating Junction Temperature Range 0 C to C Storage Temperature Range C to 0 C Electrical Characteristics (V DD = V, CIN = F, TA = C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Current I DD No Load 0.8 ma Feedback Reference Voltage V REF No Load V Line Regulation V LINE V DD = to V 0 mv Source 00mA, DRI//DRI =.V 0 Load Regulation V LOAD Sink ma, DRI//DRI =.V 0 mv Driving Capability I O Sourcing, DRI//DRI =.V 00 Sink DRI//DRI =.V ma Driver Current Limiting I CL Sourcing, DRI//DRI =.V Sink DRI//DRI =.V 0 0 ma Driver TriState Threshold V TS Sweep // to Driver Output Off.0..0 V Thermal Limit 0 C Power On Reset Voltage POR. V
5 Typical Operating Characteristics Reference (V) Reference vs Temperature Sourcing(mA) Driver Sourcing vs Drop Out 0 C C 8 C Temperature ( C) 0 0 V DD V DRI,, (V). Supply Current vs Temperature 0 Driver Sinking vs V OUT. 8 C 0 IQ(mA) 0.8 C 0 C Sinking (ma) 0 0 C C C 0. 8 V DD (V) 0 0 V OUT (V). TriSate Vth vs Temperature 00 Short Current vs Temperature 0 Vth(V)...0 Short Current (ma) Temperature ( C) Temperature ( C)
6 Application Information Capacitors Selection A 0.μF minimum capacitor is recommended between V DD and ground to increase stability. The linear controllers use dominant pole compensation integrated into the error amplifier and are sensitive to output capacitor selection. When driving external pass transistor, normally a minimum 0μF capacitor must be placed at output for stability and good transient response. When using internal pass transistor, just need 0μF capacitor for stable. Pass Transistor Selection The are designed specifically to driver external NPN or NMOSFET pass transistor for up to A output current. The driver could deliver more 00mA when driving NPN transistor and sinking for a pull up resistor load when driving a NMOSFET. Typically pass transistor with NPN hfe > 0 at Imax or NMOSFET Rdson 00mΩ are suitable in most application. Layout Considerations There are two critical layout considerations. One is the divider resistors should be located to as possible to avoid inducing any noise. The second is C OUT should be put at near the pass transistor to avoid oscillation. V DD D D D As close as to Figure R C OUT V IN V OUT Output Voltage Setting The develop a 0.8V reference voltage, especially suit for low voltage application. As shown in Figure, the output voltage could be easy set by & R resistor. The divided resistor must keep below kω for quick response and stability. Tristate Operation A special Tristate design is empolyed in the for AGP X/X power supply. Typical application shown the detail circuit. In AGP X SELECT = open, will be pulled up over.v through R 8 to trip the Tristate threshold. R 8 has to meet the following relationship: R 8 < 0. (V.) x R, R if 0.8 =.. When in AGP X SELECT =, V DDQ will work in normal.v setting.
7 Outline Dimension A H M J B F I C D Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A B C D F H I J M Lead SOP Plastic Package Richtek Technology Corporation Headquarter F, No. 0, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (88)89 Fax: (88) Richtek Technology Corporation Taipei Office (Marketing) F, No. 9, Minchiuan Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (88)899 Fax: (88)8 marketing@richtek.com Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.
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Dual High-Voltage Trench MOS Barrier Schottky Rectifier Ultra Low V F = 0.53 V at I F = 5.0 A 2 TMBS esmp Series Top View PIN PIN 2 PRIMARY CHARACTERISTICS K Bottom View I F(AV) 2 x A V RRM 0 V I FSM 50
Features. Y Wide supply voltage range 3V to 15V. Y Guaranteed noise margin 1V. Y High noise immunity 0 45 VCC (typ )
MM54C00 MM74C00 Quad 2-Input NAND Gate MM54C02 MM74C02 Quad 2-Input NOR Gate Hex Inverter MM54C10 MM74C10 Triple 3-Input NAND Gate MM54C20 MM74C20 Dual 4-Input NAND Gate General Description These logic
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N channel vertical power FET in Smart SIPMOS technology. Fully protected by embedded protection functions. Drain1. Source1. Drain2.
HITFET BTS 34G Features Logic Level Input Input Protection (ESD) Thermal shutdown with auto restart Green product (RoHS compliant) Product Summary Drain source voltage V DS 4 V Onstate resistance R DS(on)
DESCRIPTION TYPICAL APPLICATION. LTC Micropower, Regulated 5V Charge Pump in a 5-Pin SOT-23 Package FEATURES APPLICATIONS
LTC117- Micropower, Regulated V Charge Pump in a -Pin SOT-23 Package FEATRES ltralow Power: I CC = 6µA Typ Short-Circuit/Thermal Protected V ±% Regulated Output Range: 2.7V to V Output Current: 10mA (
SC1301A/B. 2A High Speed Low-Side MOSFET Driver in SOT-23 POWER MANAGEMENT. Applications. Typical Application Circuit
查询 SC1301B 供应商 Description The is a cost effective single-channel highspeed MOSFET driver. The driver is capable of driving a 1000pF load in 0ns rise/fall time and has a 60ns propagation delay time from
CD4013BC Dual D-Type Flip-Flop
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AME. 1A Single Cell Li-ion Battery Linear Charger AME2056. n General Description. n Applications. n Features
2056 n General Description The 2056 is constant-current/constant-voltage linear charger IC for single cell lithium-ion batteries. The battery charge termination voltage is fixed at 4.2V, the charge current
Features MIC4468 V S GND. Micrel, Inc Fortune Drive San Jose, CA USA tel + 1 (408) fax + 1 (408)
MIC// Quad.-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS General Description The MIC// family of -output CMOS buffer/drivers is an expansion from the earlier single- and dual-output drivers, to which
CD4021BC 8-Stage Static Shift Register
8-Stage Static Shift Register General Description The CD4021BC is an 8-stage parallel input/serial output shift register. A parallel/serial control input enables individual JAM inputs to each of 8 stages.
±1.0% (1.0 V to 1.45 V output product : ±15 mv)
S-1135 Series www.sii-ic.com HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR Seiko Instruments Inc., 28-21 Rev.2._ S-1135 Series, developed using the CMOS technology, is
TLE Data Sheet. Automotive Power. 5-V Low Dropout Voltage Regulator TLE7274-2E TLE7274-2D TLE7274-2G. Rev. 1.01,
5-V Low Dropout Voltage Regulator TLE7274-2E TLE7274-2D TLE7274-2G Data Sheet Rev. 1.1, 211-11-3 Automotive Power 5-V Low Dropout Voltage Regulator TLE7274-2 1 Overview Features Ultra Low Current Consumption
DM74LS244 Octal 3-STATE Buffer/Line Driver/Line Receiver
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CD4023M CD4023C Triple 3-Input NAND Gate CD4025M CD4025C Triple 3-Input NOR Gate
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