LP5550 datasheet(5/28 Pages) TI1

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LP5550

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SNVS378G – OCTOBER 2005 – REVISED APRIL 2013

LDO1 (PLL/Fixed Voltage) Characteristics (continued)

Unless otherwise noted, VBAT1,2,SW, 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

Unit

ΔVOUT

3.0V

≤ VBAT1,2,SW ≤ 5.5V,

Line Regulation

-0.125

0.125

%/V

IOUT = 50mA

Load Regulation

VIN = 3.6V, 1mA ≤ IOUT ≤ 100mA

-0.0085

0.0085

%/mA

Line Transient Regulation

3.6V

≤ VIN ≤ 3.9V, TRISE,FALL = 10 µs

VIN = 3.6V, 10mA ≤ IOUT ≤ 90 mA,

Load Transient Regulation

TRISE,FALL = 100 ns

Output Noise Voltage

10Hz

≤ f ≤ 100kHz, COUT = 2.2µF

0.103

mVRMS

PSRR

f = 1kHz, COUT = 2.2µF

Power Supply Ripple Rejection

Ratio

f = 10kHz, COUT = 2.2µF

COUT

0µA

≤ IOUT ≤ 100mA

2.2

µF

Output Capacitance

Output Capacitor ESR

500

Ω

tSTART-UP

Start-Up Time from Shut-down

COUT = 1µF, IOUT = 100mA

µs

LDO2 (I/O Voltage) Characteristics

Unless otherwise noted, VBAT1,2,SW , 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

Unit

VOUT Accuracy

1mA

≤ IOUT ≤ 250mA, VOUT = 2.5V,

Output Voltage Accuracy

-3%

2.5

VOUT +0.4V ≤ VBAT1,2,SW ≤ 5.5V

VOUT Range

Programmable Output Voltage

0µA

≤ IOUT ≤ 250mA, 1.5-2.3V =100mV

1.5

3.3

Range

step, 2.5V, 2.8V, 3.0V and 3.3V

IOUT

Recommended Output Current

VOUT +0.4V ≤ VBAT1,2,SW ≤ 5.5V

250

Output Current Limit

VOUT = 0V

740

Dropout Voltage(4)

IOUT = 125mA

260

Quiescent Current

IOUT = 0mA

(5)

µA

ΔVOUT

VOUT +0.4V ≤ VBAT1,2,SW ≤ 5.5V,

Line Regulation

-0.125

0.125

%/V

IOUT = 125mA

Load Regulation

VIN = 3.6V, 1mA ≤ IOUT ≤ 250mA

-0.011

0.011

%/mA

Line Transient Regulation

3.6V

≤ VIN ≤ 3.9V, TRISE,FALL = 10 us

VIN = 3.6V, 25mA ≤ IOUT ≤ 225 mA,

Load Transient Regulation

246

TRISE,FALL = 100 ns

Output Noise Voltage

10Hz

≤ f ≤ 100kHz, COUT = 4.7µF

0.120

mVRMS

PSRR

f = 1kHz, COUT = 4.7µF

Power Supply Ripple Rejection

Ratio

f = 10kHz, COUT = 4.7µF

COUT

Output Capacitance

4.7

µF

0µA

≤ IOUT ≤ 250mA

Output Capacitor ESR

500

Ω

tSTART-UP

Start-Up Time from Shut-down

COUT = 4.7µF, IOUT = 250mA

144

µs

(1)

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

(2)

Min and Max limits are ensured by design, test, or statistical analysis. Typical (Typ) numbers are not specified, but do represent the

most likely norm. Unless otherwise specified, conditions for Typ specifications are: VIN = 3.6V and TA = 25°C 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 3.0V 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, and LDO3 do not include shared functional blocks such as the bandgap reference.

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