ACT5101 datasheet(16/59 Pages) QORVO

16 / 59 page

Data Sheet Rev. E, November 2019 | Subject to change without notice

16 of 59

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ACT510x

23V Buck-Boost Converter with Integrated MOSFETs

PIN FUNCTIONS

VIN

VIN is the ACT510x input power pin. Input voltage

sensing is measured at the VIN pin. Connect input

bypass capacitors directly between VIN and PGND.

ISRP

ISRP is the positive sense pin for input current sensing.

ISRP requires an input RC filter. Refer to the Input

Current Regulation section for more details. ISRP

must be Kelvin connected to the input current sense

resistor. Connect the input current sense resistor

between ISRP and ISRN.

ISRN

ISRN is the negative sense pin for input current sensing.

ISRN requires an input RC filter. Refer to the Input

Current Regulation section for more details. ISRN

must be Kelvin connected to the input current sense

resistor. Connect the input current sense resistor

between ISRP and ISRN.

SW1, SW2

SW1 and SW2 are the switch nodes for the internal

buck-boost converter. SW1 switches between VOUT

and PGND when the IC operates in buck-boost and

boost modes. SW2 switches between VIN and PGND

when the IC operates in buck and buck-boost modes.

Connect the inductor between the SW1 and SW2 pins.

HSB1, HSB2

HSB1 and HSB2 provide power to the internal high-side

MOSFET gate driver circuitry. Connect a 47nF

capacitor from HSB1 to SW1. Connect a 47nF capacitor

from HSB2 to SW2.

VOUT

VOUT is the ACT510x output power pin. Connect output

bypass capacitors directly between VOUT and PGND.

VINS

VINS is the input voltage sense pin. Kelvin connect

input VINS to the input bypass capacitors.

OSRP

OSRP is the positive sense pin for the output current.

OSRP requires an input RC filter. Refer to the Setting

Maximum Output Current section for more details.

OSRP must be Kelvin connected to the output current

sense resistor. Connect the output current sense

resistor between OSRP and OSRN.

OSRN

OSRN is the negative sense pin for the output current.

OSRN requires an input RC filter. Refer to the Setting

Maximum Output Current section for more details.

OSRN must be Kelvin connected to the output current

sense resistor. Connect the output current sense

resistor between OSRP and OSRN.

ILIM

ILIM sets the maximum input current. Connect a resistor

between ILIM and AGND to set the current limits. The

ILIM current limit can be scaled using I2C. In some

operating conditions, ILIM requires additional RC

compensation. Refer to the Input Current Regulation

section for more details.

OLIM

OLIM sets the maximum output current. Connect a

resistor between OLIM and AGND to set the output

current limit. The OLIM current limit can be scaled using

I2C. In some operating conditions, OLIM requires

additional RC compensation. Refer to the Setting

Maximum Output Current section for more details.

INTBP

INTBP is the internal bias voltage output pin. INTBP is

supplied by an internal linear regulator. Do not power

external circuity from the INTBP pin. Connect a 100nF

ceramic capacitor between INTBP and AGND.

VREG

VREG is the internal LDO output pin. The internal LDO

is programmable between 2V and 5.1V. Its maximum

output current capability 100mA. Connect a 1uF

ceramic capacitor between VREG and AGND

EN is the active high enable input. Pulling EN high

enables the converter. The EN polarity is configurable

via NVM to make it active low or active high. Active high

is the default. EN is 5V compliant.

STAT

STAT is an open drain status pin. It indicates the state

of the converter. It goes low to indicate the converter is

enabled and has a valid output voltage. It goes HIZ to

indicate the converter is disabled or that the converter

is enabled but in a fault condition.

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