LP3990MF-1.8 datasheet(5/24 Pages) TI

5 / 24 page

LP3990

www.ti.com

SNVS251I – MAY 2004 – REVISED MAY 2013

Electrical Characteristics

Unless otherwise noted, VEN =950mV, VIN = VOUT + 1.0V, or 2.0V, whichever is higher. CIN = 1 µF, IOUT = 1 mA, COUT =0.47

µF.

Typical values and limits appearing in normal type apply for TJ = 27°C. Limits appearing in boldface type apply over the full

junction temperature range for operation,

−40 to +125°C.

(1)

Limit

Symbol

Parameter

Conditions

Typ

Units

Min

Max

VIN

Input Voltage

(2)

ΔVOUT

Output Voltage Tolerance

ILOAD = 1 mA

DSBGA

-1

WQFN

-1.5

+1.5

SOT-23

-1.5

+1.5

Over full line

DSBGA

-2.5

+2.5

and load

WQFN

-3

regulation.

SOT-23

-4

Line Regulation Error

VIN = (VOUT(NOM) + 1.0V) to 6.0V,

0.02

-0.1

0.1

%/V

Load Regulation Error

IOUT = 1mA

VOUT = 0.8 to 1.95V

0.002

-0.005

0.005

to 150mA

DSBGA

VOUT = 0.8 to 1.95V

0.003

-0.008

0.008

WQFN, SOT-23

%/mA

VOUT = 2.0 to 3.3V

0.0005

-0.002

0.002

DSBGA

VOUT = 2.0 to 3.3V

0.002

-0.005

0.005

WQFN, SOT-23

VDO

Dropout Voltage

IOUT = 150mA

(3) (4)

120

200

ILOAD

Load Current

See (5) (4)

µA

Quiescent Current

VEN = 950mV, IOUT = 0mA

VEN = 950mV, IOUT = 150mA

120

µA

VEN = 0.4V

0.002

0.2

ISC

Short Circuit Current Limit

See (6)

550

1000

IOUT

Maximum Output Current

150

PSRR

Power Supply Rejection Ratio

f = 1kHz, IOUT = 1mA to 150mA

f = 10kHz, IOUT = 150mA

VOUT = 0.8

BW = 10Hz to

Output noise Voltage (4)

VOUT = 1.5

125

µVRMS

100kHz,

VOUT = 3.3

180

TSHUTDOWN

Thermal Shutdown

Temperature

155

°C

Hysteresis

Enable Control Characteristics

IEN

(7)

Maximum Input Current at VEN

VEN = 0.0V

0.001

0.1

µA

Input

VEN = 6V

2.5

VIL

Low Input Threshold

VIN = 2V to 6V

0.4

VIH

High Input Threshold

VIN = 2V to 6V

0.95

(1)

All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production at TJ = 25°C or

correlated using Statistical Quality Control methods. Operation over the temperature specification is guaranteed by correlating the

electrical characteristics to process and temperature variations and applying statistical process control.

(2)

VIN(MIN) = VOUT(NOM) + 0.5V, or 2.0V, whichever is higher.

(3)

Dropout voltage is voltage difference between input and output at which the output voltage drops to 100mV below its nominal value.

This parameter only for output voltages above 2.0V.

(4)

This electrical specification is guaranteed by design.

(5)

The device maintains the regulated output voltage without the load.

(6)

Short circuit current is measured with VOUT pulled to 0V and VIN worst case = 6.0V.

(7)

Enable Pin has 1M

Ω typical, resistor connected to GND.

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