LP873220RHDT

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LP873220RHDT

Dual High-Current Buck Converters and Linear Regulators

Packaging

Package | PIN: RHD | 28
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $3.50
10-24 $3.15
25-99 $2.93
100-249 $2.57
250-499 $2.41
500-749 $2.05
750-999 $1.73
1000+ $1.65

Features

  • Device Operating Temperature Range: –40°C to +125°C Ambient Temperature
  • Input Voltage: 2.8 V to 5.5 V
  • Two High-Efficiency Step-Down DC-DC Converters:
    • OutputVoltage: 0.7 V to 3.36 V
    • Maximum Output Current2 A
    • Programmable Output-Voltage Slew RateFrom 0.5 mV/µs to 10 mV/µs
    • 2-MHz SwitchingFrequency
    • Spread-Spectrum Mode and Phase Interleaving for EMIReduction
  • Two Linear Regulators:
    • Input Voltage: 2.5 V to 5.5 V
    • Output Voltage: 0.8 V to 3.3V
    • Maximum Output Current 300 mA
  • Configurable General-Purpose Output Signals (GPO, GPO2)
  • Interrupt Function With Programmable Masking
  • Programmable Power-Good Signal (PGOOD)
  • Output Short-Circuit and Overload Protection
  • Overtemperature Warning and Protection
  • Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)
  • 28-pin, 5-mm × 5-mm VQFN Package with Wettable Flanks

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Texas Instruments  LP873220RHDT

The LP873220 is designed to meet the power management requirementsof the latest processors andplatforms in industrial applications. The device contains two step-down DC-DCconverters and two linear regulators and general-purpose digital-output signals. The device iscontrolled by an I2C-compatible serial interface and by an enablesignal.

The automatic PWM/PFM (AUTO mode) operation gives high efficiency over a wide output-currentrange. The LP873220 supports remotevoltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) thusimproving the accuracy of the output voltage. In addition the switching clock can be forced to PWMmode and also synchronized to an external clock to minimize the disturbances.

The LP873220 device supportsload-current measurement without the addition of external current-sense resistors. TheLP873220 devicealso supportsprogrammable start-up and shutdown delays and sequences including GPO signals synchronized to theenable signal. A second GPO signal is available with pinmultiplexing of CLKIN pin, if external clock is not needed. During start-up and voltagechange, the device controls the output slew rate to minimize output voltage overshoot and thein-rush current.