LP5551 datasheet(7/38 Pages) TI1

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LP5551

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SNVS417B – DECEMBER 2006 – REVISED APRIL 2013

LDO1 (PLL/Fixed Voltage) Characteristics

Unless otherwise noted, VDD_A, _D, VPVDD1,2 RESETN, ENABLE = 3.6V. 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 = 50 mA, VOUT = 1.2 V,

Output Voltage

-3.5%

1.2

3.1%

2.7 V

≤ VDD_A, _D, VPVDD1,2 ≤ 5.5 V

VOUT Range

Programmable Output Voltage

0.7

1.2

2.2

Programming Resolution = 100 mV

Range

IOUT

Rated Output Current

2.7 V

≤ VDD_A, _D ,PVDD1,2≤ 5.5 V

100

Output Current Limit

VOUT = 0 V

347

Quiescent Current

IOUT = 0 mA

(4)

µA

ΔVOUT

2.7 V

≤ VDD_A, _D, VPVDD1,2 ≤ 5.5 V,

Line Regulation

-0.083

0.316

%/V

IOUT = 50 mA

VDD_A, _D, VPVDD1,2 = 3.6 V,

Load Regulation

-0.013

0.013

%/mA

1 mA

≤ IOUT ≤ 100 mA

3.6 V

≤ VDD_A, _D, VPVDD1,2 ≤ 3.9 V,

Line Transient Regulation

TRISE,FALL = 10 µs

VDD_A, _D, VPVDD1,2= 3.6 V,

Load Transient Regulation

10 mA

≤ IOUT ≤ 90 mA,

TRISE,FALL = 100 ns

Output Noise Voltage

10 Hz

≤ f ≤ 100 kHz, COUT = 2.2 µF

0.103

mVRMS

PSRR

f = 1 kHz, COUT = 2.2 µF

Power Supply Ripple Rejection

Ratio

f = 10 kHz, COUT = 2.2 µF

COUT

0 mA

≤ IOUT ≤ 100 mA

2.2

µF

Output CapacitanceOutput

Capacitor ESR

500

Ω

tSTART-UP

Start-Up Time from Shut-down

COUT = 1 µF, OUT = 100 mA

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)

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

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