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    參數(shù)資料
    型號: PCA5010H
    廠商: NXP Semiconductors N.V.
    英文描述: Pager baseband controller
    中文描述: 傳呼機基帶控制器
    文件頁數(shù): 62/112頁
    文件大?。?/td> 627K
    代理商: PCA5010H
    1998 Nov 02
    62
    Philips Semiconductors
    Product specification
    Pager baseband controller
    PCA5010
    6.22
    DC/DC converter
    6.22.1
    F
    UNCTION
    The DC/DC converter converts the voltage from a single
    primary cell (0.9 to 1.6 V) to a nominal 2.2 V V
    DD
    for
    on-chip and off-chip use. For EMC reasons a special
    technique is used to minimize coil current ripples under all
    load conditions.
    The voltage generated by the DC/DC converter is
    available at pin V
    DD(DC)
    . The supply for all functions of the
    chip is taken from the V
    DD
    and V
    DDA
    pins. The user has to
    connect V
    DD(DC)
    to the other V
    DD
    pins. The supply used for
    the reference and comparators is taken from V
    DDA
    .
    A typical circuit configuration is shown in Fig.36.
    For a certain current load (I
    L
    ) the controller settles to a
    stable voltage V
    DD
    (I
    L
    ) in the window 2.15 to 2.25 V.
    Increasing the load decreases V
    DD
    (I
    L
    ) by a small amount.
    When V
    DD
    (I
    L
    ) drops below 2.15 V the DC/DC converter
    calculates a new set of coefficients and V
    DD
    (I
    L
    ) settles
    again between 2.15 and 2.25 V (see Fig.45).
    Fig.36 Typical operating circuit.
    handbook, full pagewidth
    MGL458
    VIND
    VDD(DC)
    2.25 V
    2.15 V
    DIGITAL
    CONTROL
    D1
    6 MHz
    MICROCONTROLLER
    VSS, VSSA
    RESETIN
    VBAT
    BAND GAP
    BLI
    Ci
    4.7
    μ
    F
    Co
    4.7
    μ
    F
    VBAT
    0.9
    to
    1.6 V
    C1
    R1
    VDD
    VDD
    VDDA
    L
    470
    μ
    H
    PCA5010
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