SC900AEVB datasheet(8/23 Pages) SEMTECH

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POWER MANAGEMENT

SC900A

Pin Descriptions

Pin#

Pin Name

Pin Function

LDOB

LDO B output.

INB

Input supply for the digital system logic and the LDO B pass transistor.

SDA

Bidirectional open drain digital I/O pin. I2C serial data.

SCL

Digital input. I2C serial clock.

Digital input. High to enable part. Low to disable part (sleep mode).

Note I2C control is active only when part is enabled.

One bit address for connecting two SC900A devices on to the system through

the I2C interface.

DGND

Digital ground.

VASEL

LDO A selection default voltage. Tie this pin to ground for 1.8V or INB for 2.8V.

LDOPGD

Digital output. State change indicates that one of four LDO output voltages (A, C, D or E)

is out of spec. Note, desired state of pin is programmable through the I2C interface.

ARST

Digital output. State change indicates LDO A output voltage is out of spec.

Note, desired state of pin is programmable through the I2C interface.

VREF

Bandgap reference output voltage. Connect at least 0.1μF to ground (C

VREF ≥ 0.1μF).

GND

Analog ground.

VIN

Analog supply voltage.

INE

Input supply for the LDO E pass transistor.

LDOE

LDO E output.

LDOD

LDO D output.

INCD

Input supply for the LDO C and LDO D pass transistors.

LDOC

LDO C output.

INA

Input supply for the LDO A pass transistor.

LDOA

LDO A output.

Thermal

Pad

Thermal Pad for heatsinking purposes. Connect to ground plane using multiple vias.

Not connected internally.

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