ADP5140WACCZ-R7 datasheet(36/128 Pages) AD

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ADP5140

Data Sheet

Rev. 0 | Page 36 of 128

LDO REGULATORS

The ADP5140 integrates seven LDO regulators with low

dropout voltages and low noise performance. Each LDO

regulator has a different input voltage range, different output

voltage options, and different output load capabilities.

Each LDO regulator integrates a soft start circuit to reduce the

inrush current during power-up.

LDO1 (Regulator 5)

LDO1 is a 300 mA LDO regulator with an input voltage range

from 1.7 V to 5.5 V. The output voltage is programmable

through the SPI with eight options available: 1.755 V, 1.8 V,

1.845 V, 1.89 V, 1.935 V, 1.98 V, 2.025 V, and 2.070 V. The

default output voltage for this regulator is 1.8 V.

LDO1 integrates input undervoltage and overvoltage detection

circuits on the corresponding input power supply (VPVIN56). When

undervoltage or overvoltage on the input is detected, it is

reported in the OTHER1_STATUS register and

OTHER1_LATCH register.

LDO2 (Regulator 6)

LDO2 is a high current LDO regulator that provides an output

load current of up to 2.3 A. The input voltage range is from 1.7

V to 5.5 V and the output voltage is programmable through the

SPI with eight options available: 1.755 V, 1.8 V, 1.845 V, 1.89 V,

1.935 V, 1.98 V, 2.025 V, and 2.070 V. The default output

voltage for this regulator is 1.8 V.

LDO2 integrates input undervoltage and overvoltage detection

circuits on the corresponding input power supply (VPVIN56). When

undervoltage or overvoltage on the input is detected, it is

reported in the OTHER1_STATUS register and

OTHER1_LATCH register.

LDO3 (Regulator 7)

LDO3 is a high current LDO regulator that provides an output

load current of up to 1.4 A. The input voltage range is from

0.9 V to 1.98 V and the output voltage is programmable

through the SPI with eight options available: 0.864 V, 0.9 V,

0.936 V, 0.972 V, 1.008 V, 1.044 V, 1.08 V, and 1.116 V. The

default output voltage for this regulator is 0.9 V.

LDO3 integrates input undervoltage and overvoltage detection

circuits on the corresponding input power supply (VPVIN78). When

undervoltage or overvoltage on the input is detected, it is

reported in the OTHER1_STATUS register and

OTHER1_LATCH register.

LDO4 (Regulator 8)

LDO4 is a high current LDO regulator that provides an output

load current of up to 1.2 A. The input voltage range is from

0.9 V to 1.98 V and the output voltage is programmable

through the SPI with eight options available: 0.864 V, 0.9 V,

0.936 V, 0.972 V, 1.008 V, 1.044 V, 1.08 V, and 1.116 V. The

default output voltage for this regulator is 0.9 V.

LDO4 integrates input undervoltage and overvoltage detection

circuits on the corresponding input power supply (VPVIN78). When

undervoltage or overvoltage on the input is detected, it is

reported in the OTHER1_STATUS register and

OTHER1_LATCH register.

LDO5 (Regulator 9)

LDO5 is a low noise LDO regulator that provides an output

load current of up to 500 mA. The input voltage range is from

0.9 V to 1.98 V and the output voltage is programmable

through the SPI with eight options available: 0.864 V, 0.9 V,

0.936 V, 0.972 V, 1.008 V, 1.044 V, 1.08 V, and 1.116 V. The

default output voltage for this regulator is 0.9 V.

LDO5 integrates input undervoltage and overvoltage detection

circuits on the corresponding input power supply (VPVIN9). When

undervoltage or overvoltage on the input is detected, it is

reported in the OTHER1_STATUS register and

OTHER1_LATCH register.

LDO6 (Regulator 10)

LDO6 is a 50 mA LDO regulator with an input voltage range

from 2.7 V to 5.5 V. The output voltage is programmable through

the SPI with four options available: 3.2 V, 3.3 V, 3.35 V, and 3.4 V.

The default output voltage for this regulator is 3.3 V.

LDO7 (Regulator 11)

LDO7 is a 400 mA LDO regulator with an input voltage range

from 2.7 V to 5.5 V. The output voltage is programmable

through the SPI with four options available: 3.2 V, 3.3 V, 3.35 V,

and 3.4 V. The default output voltage for this regulator is 3.3 V.

LDO Regulator Current Limits

Each LDO regulator has internal current-limit protection.

When the output current exceeds the current-limit threshold,

the output current maintains as a constant current while the

output voltage is reduced, which can cause an undervoltage event.

Output Undervoltage and Overvoltage Protection for

LDO Regulators

A window comparator monitors the output voltage of each LDO

regulator through each regulator feedback pin or output pin. If

the output voltage is outside of the warning or fault window, an

output voltage warning or fault event is detected. The window

comparator uses a dedicated reference for safety consideration.

The warning or fault threshold is programmable through the

SPI. Refer to the Feedback Voltage Monitor section for more

information.

LDO Regulator Local Temperature Warnings

Each LDO regulator has a local temperature monitor that provides

thermal warning protection. If the local temperature of the

LDO regulator is higher than the overtemperature threshold,

an overtemperature warning event occurs. This warning event

is reported in the OT_STATUS register and OT_LATCH

overtemperature warning occurs.

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