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SA33101HSP

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36V Synchronous Buck Controller for Automotive Application
Datasheet
SA33101HSP 36V Synchronous Buck Controller for Automotive Application Datasheet
    Part numberSA33101HSP
    Channel(#)1
    Vin (min) (V)4
    Vin (max) (V)36
    TopologyBuck
    Switching frequency (min)(kHz)200
    Switching frequency (max)(kHz)1000
    Vout (min) (V)0.7
    Vout2 (min)(V)
    Vout (max) (V)5.3
    Vout2 (max )(V)
    Vref accuracy (±%)2
    Vout accuracy(±%)
    Control modeCurrent mode fix frequency
    Duty cycle (max)(%)94
    Operation modePFM/FCCM
    Iq (typ) (uA)8
    FeaturesSuport PLL/PFM/FCCM,Controller
    PackageSSOP-18E
    Operating temperature range(°C)-40 to 125
    Functional safety category
    • AEC-Q100-Grade 1 -40℃~125℃
    • Wide Input Voltage Ranges from 4.0 V to 36V
    • Start-up Input Voltage: 4.5V
    • Output Voltage Range from 0.7V to 5.3V
    • Fold Back Reference Voltage: 640mV±1%
    • Adjustable Switching Frequency: 250kHz to 1MHz
    • Spread Frequency Function
    • Adjustable Soft-start Time
    • Pre-bias Start-up
    • Output Voltage Abnormal Detection, Shows on PGOOD Pin, UVD/OVD
    • Cycle by Cycle Current Limit Protection
    • Thermal Shut down When Tj>160℃
    • Reliable Protection: SOP/UVD/OVD/OVP/OTP
    • Package: SSOP18E

    The SA33101 is a synchronous step-down controller that can generate output voltages from 0.7V to 5.3V by driving the external high/low side NMOS. The user-settable switching frequency can be adjusted from 250kHz to 1.0MHz through an external resistor, and can be synchronized with an external clock. The device supports three operating modes: PWM mode, PLL PWM mode and PFM mode. These modes can be selected under the conditions of the MODE pin. In particular, the automatic PFM mode increases efficiency under light load conditions.

    The SA33101 has the protection functions including cycle by cycle current limit function, UVD (Under Voltage Detection), OVD (Over Voltage Detection), OVP (Over Voltage Protection), SCP (Short Circuit Protection) and thermal shut down. Also, the PGOOD (Power Good) pin provides the status of output.

    The CLKOUT Pin of SA33101 is equipped with phase shift 180°function to meet the multiphase application. For EMI reduction purpose, spread-spectrum clock generator for diffused oscillation frequency at the PWM operation is available.

    The SA33101 is available in SSOP18E package.

    Technical Documentation