LP5551 datasheet(8/38 Pages) TI1

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LP5551

SNVS417B – DECEMBER 2006 – REVISED APRIL 2013

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LDO2 (I/O Voltage) Characteristics

Unless otherwise noted, VDD_A, _D , VPVDD1,2 RESETN, ENABLE = 3.6 V. Typical values and limits appearing in normal type

apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, -40 to

+125°C

(1) (2) (3)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VOUT Accuracy

IOUT = 125 mA, VOUT = 3.3 V,

Output Voltage

-3.7%

3.3

2.8%

3.6 V

≤ VDD_A, _D ≤ 5.5 V

VOUT Range

Programmable Output Voltage

1.5-2.3 V = 100 mV step, 2.5 V, 2.8 V,

1.5

3.3

Range

3.0 V and 3.3 V

IOUT

Rated Output Current

3.6 V

≤ VDD_A, _D, VPVDD1,2 ≤ 5.5 V

250

Output Current Limit

VOUT = 0V

615

Dropout Voltage(4)

IOUT = 125 mA

192

Quiescent Current

IOUT = 0 mA

(5)

µA

ΔVOUT

3.6 V

≤ VDD_A, _D ≤ 5.5 V,

Line Regulation

-0.08

0.312

%/V

IOUT = 125 mA

VDD_A, _D, VPVDD1,2 = 3.6 V,

Load Regulation

-0.018

0.018

%/mA

1 mA

≤ IOUT ≤ 250 mA

3.6 V

≤ VDD_A, _D, VPVDD1,2 ≤ 3.9 V,

Line Transient Regulation

TRISE,FALL = 10 us

VDD_A, _D, VPVDD1,2 = 3.6 V,

Load Transient Regulation

25 mA

≤ IOUT ≤ 225 mA,

246

TRISE,FALL = 100 ns

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz,COUT = 4.7 µF

0.120

mVRMS

PSRR

f = 1 kHz, COUT = 4.7 µF

Power Supply Ripple Rejection

Ratio

f = 10 kHz, COUT = 4.7 µF

COUT

Output Capacitance

4.7

µF

0 mA

≤ IOUT ≤ 250 mA

Output Capacitor ESR

500

Ω

tSTART-UP

Start-Up Time from Shut-down

COUT = 4.7 µF, IOUT = 250 mA

144

µs

(1)

All voltages are with respect to the potential at the GND pin.

(2)

All limits are ensured by design, test and/or statistical analysis. All electrical characteristics having room-temperature limits are tested

during production with TJ = 25C. All hot and cold limits are ensured by correlating the electrical characteristics to process and

temperature variations and applying statistical process control.

(3)

Capacitors: Low-ESR Surface-Mount Ceramic Capacitors are (MLCCs) used in setting electrical characteristics

(4)

Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. This specification

does not apply in cases it implies operation with an input voltage below the 2.7V minimum appearing under Operating Ratings. For

example, this specification does not apply for devices having 1.5V outputs because the specification would imply operation with an input

voltage at or about 1.5V

(5)

Quiescent current for LDO1, LDO2, LDO3, and LDO4 do not include shared functional blocks such as the bandgap reference.

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