KEC [PW/IC] ƒ’ˆê¸°ë¶€ IC ë”ë™‍‘¤‘—(V IN ... Output Voltage (V) Voltage Regulator Line-up (G/P) First Best [PW / IC] Strategic Marketing

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    Regulator IC

    2009. 05. 18.2009. 05. 18.KEC [PW/IC] KEC [PW/IC]

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    Power Management IC

    . Linear Regulator1)

    2)

    3) Bipolar vs. MOS

    4) CMOS LDO

    . Switching Regulator1) Buck converter

    . Electrical Characteristics (KIA7805)1) Protection Function

    2) Thermal Consideration

    3) Capacitor Tip

    KEC Power Management IC

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    Power Management

    Linear Regulator

    Switching Regulator

    G.P Regulator

    LDO Regulator

    Quasi Regulator

    Shunt Regulator

    Inductorless

    Inductor Based

    External FET

    Integrated FET

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    Linear Regulator

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    [ Linear Regulator IC ][ Linear Regulator IC ]1) Regulator Set

    , Regulator

    IC .

    2) 1.5V24V ,

    .

    3) C-MOS, TTL Digital IC Linear

    System .

    , Regulator IC .

    Noise .

    , .

    Linear Regulator?

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    Vout VR3 Error amp (-) Q1 IB1 Q2 IB2 IL Vout

    Vout VR3 Error amp (+) Q1 IB1 Q2 IB2 IL Vout

    R2 R3 Error AMP VR3 ,

    Vref Q1 IB1 Q2 IB2 IC Vout

    Error AMP

    +

    -

    OUTRL

    R2

    R3

    Vin

    0

    Q1

    Q2

    D1

    Vout

    Vref

    IC

    IL

    Pass TR

    OUTR VRR

    RV32

    33

    +=VR3

    [ [ Linear RegulatorLinear Regulator ]]

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    STD REG : KIA7805APILDO REG : KIA78R05PI

    2 [W]=1 [A]2 [V]0.5 [W]= 1 [A]0.5 [V]PD= [(VIN-VOUT)IOUT]+(VINIGND)

    Condition : VOUT = 5 [V], IOUT =1 [A] Power Dissipation

    [ Output Power Transistor [ Output Power Transistor (V(VDD : Dropout Voltage) ]: Dropout Voltage) ]

    [ Regulator[ Regulator Power Dissipation ]Power Dissipation ] LDO Regulator : PD

    VD = 2VBE + PNP Sat

    1.7 ~ 2.5V

    VD = VBE + PNP Sat

    0.9 ~ 1.5V

    VD = PNP Sat

    0.1 ~ 0.7V

    (1)

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    [ Type[ Type Output Voltage Output Voltage ]]

    1) : VIN = VOUT VD) LDO General Type (KIA78R05PI) : 5V 0.3V (VD ) = 5.3V ) Quasi Type (KIA1117PI50) : 5V 1.1V (VD ) = 6.1V ) General Type (KIA7805API) : 5V 2.0V (VD ) = 7.0V

    2) LDO Quasi General Type

    (2)

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    [ Power Tr.[ Power Tr. ]]

    Bipolar vs. CMOS

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    1. Bipolar LDO CMOS

    (KIC3201S/T-xx : Typ. 8uA, KIC3210T-xx : 0.2uA (at shutdown)

    : Portable

    .

    . .

    . On .

    2. Low dropout voltage P MOSFET

    .

    ( / PDA / DSC / PC )

    3. (0.05V /0.1V Step )

    [ CMOS LDO[ CMOS LDO ]]

    CMOS LDO

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    Switching Regulator

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    [ Switching Regulator IC ][ Switching Regulator IC ]Switching Regulator ,

    IC .

    Vref

    OSC

    Error AMP

    Comparator

    SWControl

    [ Switching Regulator[ Switching Regulator ]]

    Error AMP Vref PWM

    Duty & Inductor

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    +

    Vin

    _

    Cin

    +

    VD

    _

    Lo

    iL +

    Vo

    _

    Co Ro

    VDVO

    iLL

    VinL

    VV oin LVo

    LVo

    +

    Vin

    _

    Cin

    +

    VD

    _

    Lo

    iL +

    Vo

    _

    Co Ro

    isw

    Switch ONSwitch OFF

    [ Buck Converter ][ Buck Converter ]

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    Vin - Vout

    L T(on)

    Vout

    L T(off)

    Switch ON Inductor

    Switch OFF Inductor

    Vin - Vout

    L T(on)

    Vout

    L T(off) Inductor

    Vout

    Iout

    VD

    iL

    Vout

    Vin

    T(on)

    T(on) + T(off)

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    Electrical CharacteristicsDescription

    (KIA7805 / G.P Regulator)

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    Junction

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    (mV % )

    (mV % )

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    Bias

    Bias

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    GND Short ( ),

    IOUT

    VOUT

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    Device Noise .

    PSRR : AC Noise .

    Ex.) PSRR = 60dB , 10mV AC Noise , 10uV Filtering

    . (1000 ), 78dB 10,000 Filtering .

    PSRRVOUTPUTRipple

    VINPUT Ripple= 20 log

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    [ [ ]] , IC

    IOUT

    VOUT

    [ [ ]]IC Chip , Off IC

    Tj

    VOUT

    150

    Protection Function

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    [ [ ]] , IC

    VIN

    VOUT

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    [ Regulator IC[ Regulator IC ]]Regulator IC (VIN VOUT) IOUT .

    IC (PD) , Junction

    .

    PD .

    PD = [(VIN VOUT) IOUT ] + (VIN IGND)

    Junction IC PD . ( Tj (max) =150 .)

    Junction Application , Heatsink .

    PD = [TJ(MAX) TA(MAX)] / RTH(J-A)

    TJ(MAX) .

    TJ(MAX) 150 20% Margin .

    Thermal Consideration

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    (1) J-C : Junction-Case Thermal Resistance. (2) C-A : Case-Ambient Thermal Resistance. (3) C-HS : Case-Heat Sink Thermal Resistance. (4) HS : Heat Sink Thermal Resistance.

    78

    C-A

    0.5

    C-HS

    84

    J-AJ-C

    6

    Thermal Resistance (/W)

    KIA7805API (1A)

    ITEM

    KIA7805API

    [ Regulator IC[ Regulator IC ]]

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    (C-A C-HS HS)

    (C-A) (C-HS HS) TOTAL = J-C

    [/W]78 HS

    (78 HS) TOTAL = 6

    [/W]PD

    TJ(MAX) TA(MAX)TOTAL =

    1. .

    2. Junction PD .

    ---- Eq. (1)

    ---- Eq. (2)

    [ Heatsink Size [ Heatsink Size ]]

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    - Vin=10V, Vout=5V, Io=1A.- Ta (max) = 50 ( 50 )- Tj (max)=150

    , Power dissipation .- PD = (Vin - Vout) Iout = (10V 5V) 1A = 5W

    Equation (2) ,50 + (5W TOTAL) 150

    TOTAL 20 /W

    TOTAL Equation (1) HS .

    HS = 17.06 /W

    3. Heatsink size ,

    KIA7805APIMaximum Junction 150

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    Heat sink size Graph

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    [ Input / Output Capacitor ]

    Regulator Gain (70~80dB) OP AMP .

    , System ( ) Output Capacitor

    .

    LDO Regulator ESR Capacitor Regulator .

    KEC Regulator COUT 10uF (4 LDO : 47uF) Noise

    .

    Capacitor Selection

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    Power Management ICProducts Guide

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    SOT-89 TO-92 TO-92L DPAK TO-126 TO-220IS

    KIA79MxxPIKIA79MxxTKIA79MxxF1.1-350.5

    KIA79LxxF

    KIA78LxxF

    SOT-89

    KIA79SxxP

    KIA78SxxP

    TO-92

    KIA79LxxBP

    KIA78LxxBP

    TO-92L

    KIA78MxxPIKIA78MxxTKIA78MxxF2350.5

    1

    0.15A

    1

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