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LP87564-Q1: the difference between LP875640 and LP87564T

Part Number: LP87564-Q1

Hi, all

       What is the difference between LP875640RNFRQ1 and LP87564TRNFRQ1? It is not listed  in LP8756x datasheet.

  • Hi Ken,

    See the technical reference manuals https://www.ti.com/lit/pdf/snvu815 and https://www.ti.com/lit/pdf/snvu634

    Here are the register differences between those two devices.

    LP875640RNFRQ1 LP87564TRNFRQ1
    Register address Bitfield name Value Value description Value Value description SAME?
    0x01 OTP_ID 0x16 0x16 0x89 0x89 FALSE
    0x02 BUCK0_FPWM 0x00 AUTO mode 0x01 Forced PWM FALSE
    0x03 SLEW_RATE0 0x04 3.8 mV/us 0x05 1.9 mV/us FALSE
    0x04 BUCK1_FPWM 0x00 AUTO mode 0x01 Forced PWM FALSE
    0x05 SLEW_RATE1 0x04 3.8 mV/us 0x05 1.9 mV/us FALSE
    0x06 EN_BUCK2 0x00 DISABLED 0x01 ENABLED FALSE
    0x06 EN_PIN_CTRL2 0x00 EN_BUCK2 bit 0x01 EN_BUCK1 bit AND ENx pin FALSE
    0x06 BUCK2_FPWM 0x00 AUTO mode 0x01 Forced PWM FALSE
    0x07 SLEW_RATE2 0x04 3.8 mV/us 0x05 1.9 mV/us FALSE
    0x08 BUCK3_FPWM 0x00 AUTO mode 0x01 Forced PWM FALSE
    0x09 SLEW_RATE3 0x04 3.8 mV/us 0x05 1.9 mV/us FALSE
    0x0A BUCK0_VSET 0x0A 600 mV 0x61 1100 mV FALSE
    0x0C BUCK1_VSET 0x0A 600 mV 0x61 1100 mV FALSE
    0x0E BUCK2_VSET 0x0A 600 mV 0x4D 1000 mV FALSE
    0x10 BUCK3_VSET 0x0A 600 mV 0x61 1100 mV FALSE
    0x21 TDIE_WARN_MASK 0x01 MASKED 0x00 UNMASKED FALSE
    0x22 RESET_REG_MASK 0x00 UNMASKED 0x01 MASKED FALSE
    0x28 PG3_SEL 0x01 Power-Good-threshold voltage 0x00 Masked FALSE
    0x28 PG1_SEL 0x01 Power-Good-threshold voltage 0x00 Masked FALSE
    0x28 PG0_SEL 0x01 Power-Good-threshold voltage 0x00 Masked FALSE
    0x29 HALF_DELAY 0x00 0-15ms (DOUBLE_DELAY=0) / 0-30ms (DOUBLE_DELAY=1) 0x01 0-4.8ms (DOUBLE_DELAY=0) / 0-9.6ms (DOUBLE_DELAY=1) FALSE
    0x2C EN_SPREAD_SPEC 0x00 DISABLED 0x01 ENABLED FALSE
    0x2C GPIO3_SEL 0x00 EN3 0x01 GPIO3 FALSE
    0x2C GPIO2_SEL 0x00 EN2 0x01 GPIO2 FALSE
    0x2D GPIO1_OD 0x01 Open-drain output 0x00 Push-pull output FALSE
    0x2D GPIO3_DIR 0x01 Output 0x00 Input FALSE
    0x2D GPIO2_DIR 0x01 Output 0x00 Input FALSE
    0x2D GPIO1_DIR 0x01 Output 0x00 Input FALSE
    0x2F GPIO3_OUT 0x00 Logic low level 0x01 Logic high level FALSE
    0x2F GPIO2_OUT 0x00 Logic low level 0x01 Logic high level FALSE

    BR,

    Samuli

  • thanks!

    Input error? they are should be LP875640, LP87564T.

  • Hi Ken,

    Ah, you are correct. I fixed the table now. The right one is LP87564T-Q1.

    BR,

    Samuli