LP2966 datasheet(4/21 Pages) TI

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LP2966

SNVS028E – APRIL 2000 – REVISED APRIL 2013

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ELECTRICAL CHARACTERISTICS

Limits in standard typeface are for Tj = 25°C, and limits in boldface type apply over the full operating junction temperature

range. Unless otherwise specified, VIN = VO(NOM) + 1V

(1), C

OUT = 1µF, IOUT = 1mA, CIN = 1µF, VSD1 = VSD2 = VIN.

LP2966IMM(3)

Symbol

Parameter

Conditions

Typ(2)

Unit

Min

Max

(4)

Output Voltage

VOUT + 1V < VIN < 7.0V

0.0

−1

%VNOM

Tolerance

-3

1mA < IL < 100mA

0.0

−1.5

1.5

%VNOM

-3.5

3.5

ΔVO/ΔVIN

(4) (5)

Output Voltage Line

0.1

mV/V

Regulation

ΔVO/ΔIOUT

Output Voltage Load

1mA < IL< 100mA

(6)

0.1

mV/mA

Regulation(6)

ΔVO2/ΔIOUT1

Output Voltage Cross

1mA < IL1< 100mA

(7)

0.0004

mV/mA

Regulation(7)

VIN -VOUT

Dropout Voltage(8)

IL = 1mA

0.9

2.0

3.0

IL = 100mA

130

180

IL = 150mA

135

195

270

IGND(1,0)

(9)

Ground Pin Current

IL = 1mA

300

(One LDO On)

VSD2 ≤ 0.1V, VSD1= VIN

µA

IL = 100mA

340

VSD2 ≤ 0.1V, VSD1= VIN

IGND(1,1)

Ground Pin Current

IL = 1mA

340

450

(Both LDOs On)

500

µA

IL = 100mA

420

540

600

IGND(0,0)

Ground Pin Current in

VSD1= VSD2 ≤ 0.1V

0.006

0.3

µA

Shutdown Mode

IO(PK)

Peak Output Current

See(10)

500

350

VOUT≥ VOUT(NOM)- 5%

150

Short Circuit Foldback Protection

IFB

Short Circuit Foldback

See(10)(11)

600

Knee

(1)

The condition VIN = VO(NOM) + 1V applies when Vout1 = Vout2. If Vout1 ≠ Vout2, then this condition would apply to the output which is

greater in value. As an example, if Vout1 = 3.3V and Vout2 = 5V, then the condition VIN = VO(NOM)+ 1V would apply to Vout2 only.

(2)

:Typical numbers are at 25°C and represent the most likely parametric norm.

(3)

:Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using

Statistical Quality Control (SQC) methods. The limits are used to calculate Averaging Outgoing Quality Level (AOQL).

(4)

Output voltage tolerance specification also includes the line regulation and load regulation.

(5)

Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in input line voltage.

(6)

Output voltage load regulation is defined as the change in output voltage from the nominal value when the load current changes from

1mA to 100mA.

(7)

Output voltage cross regulation is defined as the percentage change in the output voltage from the nominal value at one output when

the load current changes from 1mA to full load in the other output. This is an important parameter in multiple output regulators. The

specification for

ΔVO1/ΔIOUT2 is equal to the specification for ΔVO2/ΔIOUT1.

(8)

Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below the nominal value. Drop-out

voltage specification applies only to output voltages greater than 2.7V. For output voltages below 2.7V, the drop-out voltage is nothing

but the input to output differential, since the minimum input voltage is 2.7V.

(9)

The limits for the ground pin current specification, IGND(0,1) will be same as the limits for the specification, IGND(1,0).

(10) At elevated temperatures, devices must be derated based on package thermal resistance. The device in the surface-mount package

must be derated at

θjA = 235°C/W, junction-to-ambient. Please refer to APPLICATIONS INFORMATION: Maximum Current Capability

for further information. The device has internal thermal protection.

(11) LP2966 has fold back current limited short circuit protection. The knee is the current at which the output voltage drops 10% below the

nominal value.

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