ADP1755ACPZ-R7 datasheet(4/20 Pages) AD

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ADP1754/ADP1755

Data Sheet

Rev. E | Page 4 of 20

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

OUTPUT NOISE

OUTNOISE

10 Hz to 100 kHz, VOUT = 0.75 V

µV rms

10 Hz to 100 kHz, VOUT = 2.5 V

µV rms

POWER SUPPLY REJECTION RATIO

PSRR

VIN = VOUT + 1 V, IOUT = 10 mA

1 kHz, VOUT = 0.75 V

1 kHz, VOUT = 2.5 V

10 kHz, VOUT = 0.75 V

10 kHz, VOUT = 2.5 V

100 kHz, VOUT = 0.75 V

100 kHz, VOUT = 2.5 V

Minimum output load current is 500 μA.

Accuracy when VOUT is connected directly to ADJ. When VOUT voltage is set by external feedback resistors, absolute accuracy in adjust mode depends on the

tolerances of resistors used.

Based on an end-point calculation using 10 mA and 1.2 A loads. See Figure 6 for typical load regulation performance.

Dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. This applies only to output voltages

above 1.6 V.

Start-up time is defined as the time between the rising edge of EN to VOUT being at 95% of its nominal value.

Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 1.0 V

output voltage is defined as the current that causes the output voltage to drop to 90% of 1.0 V, or 0.9 V.

INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS

Table 2.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

MINIMUM INPUT AND OUTPUT CAPACITANCE1

CMIN

TA = −40°C to +125°C

3.3

µF

CAPACITOR ESR

RESR

TA = −40°C to +125°C

0.001

0.1

Ω

The minimum input and output capacitance should be greater than 3.3 µF over the full range of operating conditions. The full range of operating conditions in the

application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R and X5R type capacitors are recommended;

Y5V and Z5U capacitors are not recommended for use with this LDO.

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