LP3918TLSLASHNOPB datasheet(10/39 Pages) TI1

10 / 39 page

LP3918

SNVS476D – AUGUST 2007 – REVISED MAY 2013

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LDO5 (RX), LDO6 (TX), LDO7 (GP) Electrical Characteristics (continued)

Unless otherwise noted, VIN ( = VIN1 = VIN2 = BATT) = 3.6V, GND = 0V, CVIN1-2=10µF, CLDOX=1µF. RX_EN, TX_EN high.

LDO7 Enabled via Serial Interface. Note VINMIN is the greater of 3.0V or VOUT5/6/7 + 0.5V. 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, Ta = TJ = −40°C to +125°C.

(1)

operation, Ta = TJ = −40°C to +125°C.

(1)

Limit

Symbol

Parameter

Condition

Typ

Units

Min

Max

VOUT5, VOUT6,

Output Voltage

IOUT5/6/7 = 1mA, VOUT5/6/7=

−2

VOUT7

3.0V

−3

Output Voltage

LDO5 default

3.0

LDO6 default

3.0

LDO7 default

3.0

IOUT5, IOUT6,

Output Current

VINMIN ≤ VIN ≤ 5.5V

150

IOUT7

Output Current Limit

VOUT5/6/7 = 0V

300

VDO5, VDO6,

Dropout Voltage

IOUT5/6/7 = 150mA

(2)

180

240

VDO7

ΔVOUT5,

Line Regulation

VINMIN ≤ VIN ≤ 5.5V

ΔVOUT6, ΔVOUT7

IOUT5/6/7 = 1mA

Load Regulation

1mA

≤ IOUT5/6/7 ≤ 150mA

en5, en6, en7

Output Noise Voltage

10Hz

≤ f ≤ 100kHz,

µVRMS

COUT = 1µF

(3)

PSRR

Power Supply Rejection

F = 10kHz, COUT = 1µF

Ratio

IOUT5/6/7 = 20mA

(3)

tSTART-UP

Start-Up Time from Shut-

COUT = 1µF, IOUT5/6/7 =

µs

down

150mA

(3)

tTransient

Start-Up Transient

COUT = 1µF, IOUT5/6/7 =

Overshoot

150mA

(3)

(1)

All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C. All hot and cold limits are

specified by correlating the electrical characteristics to process and temperature variations and applying statistical process control.

(2)

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.

(3)

Specified by design. Not production tested.

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