LP3987 datasheet(4/21 Pages) TI1

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LP3987

SNVS164G – OCTOBER 2001 – REVISED MAY 2013

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Electrical Characteristics

Unless otherwise specified: VEN = 1.8V, MODE = 1.8V, VIN = VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF.

Typical values and limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the

entire junction temperature range for operation,

−40°C to +125°C.

(1) (2)

Limit

Parameter

Test Conditions

Typ

Unit

Min

Max

Output Voltage Tolerance

IOUT = 1mA, 25°C

-2

% of

VOUT(nom)

IOUT = 1mA

−3

Line Regulation Error

VIN = (VOUT(nom) + 0.5V) to 6.0V,

−0.1

0.1

%/V

IOUT = 1 mA

ΔVOUT

Load Regulation Error

IOUT = 1mA to 150 mA

0.0004

0.002

%/mA

Dropout Voltage(3)

IOUT = 1mA

0.4

IOUT = 150mA

100

ΔVOUT(SLEEP)

Output Voltage difference at

MODE = 0V, (4)

-150

+100

MODE = 0V

Transient

Line Transient Response(5)

MODE = 1.8V, ILOAD = 100mA, TRISE

mVpp

Response

= TFALL = 10µS,

VIN = 600mV P-P AC Square wave,

(6)

Load Transient Response(5)

MODE = 1.8V, COUT = 4.7µF, TRISE =

100

mVpk

TFALL = 100nS,

VIN = 3.1V, 3.6V, 4.2V,

(7) (8)

VIN = VOUT(nom) + 1V, MODE = 1.8V, f

= <10 kHz,

IOUT = 1mA

Power Supply Rejection

PSRR

Ratio(5)

VIN = VOUT(nom) + 1V, MODE = 0V, f =

<10 kHz,

IOUT = 1mA

IQ(ON)

Quiescent Current

MODE = 1.8V, IOUT = 0mA, VIN =

120

4.2V

µA

MODE = 1.8V, IOUT = 150mA, VIN =

160

200

4.2V

IQ(OFF)

Quiescent Current

ENABLE = 0V, VIN = 4.2V

µA

IQ(SLEEP)

Current in Standby Mode

MODE = 0V, IOUT = 50µA, VIN = 4.2V

µA

ISC

Short Circuit Current Limit(5)

Output Grounded

600

ISC(SLEEP)

Short Circuit Current in Sleep

Output Grounded

MODE

IOUT(ON)

Maximum Output Current at

MODE = 1.8V

150

MODE = 1.8V

IOUT(SLEEP)

Maximum Output Current at

MODE = 0V

Output Noise Voltage(5)

BW = 10 Hz to 100 kHz,

µVrms

COUT = 1µF

TSHUTDOWN

Shutdown Temperature(5)

Sleep MODE = 1.8V

155

°C

Logic Control Characteristics

IEN

Maximum Input Current at EN

VEN = 0 and VIN= 6.0V

0.015

µA

VIL

Logic Low Input Threshold

VIN = 3.05 to 6V

0.5

VIH

Logic High Input Threshold

VIN = 3.05 to 6V

1.2

(1)

Min and Max Limits are verified by design, test, or statistical analysis. Typical (Typ.) numbers are not verified, but do represent the most

likely norm.

(2)

The nominal output voltage, which is labeled VOUT(nom), is the output voltage measured with the input 0.5V above VOUT(nom) and a 1mA

load.

(3)

Dropout voltage is defined as the input to output voltage differential at which the output voltage falls to 100mV below the nominal output

voltage. VIN less than minimum operating voltage may be used for test purposes.

(4)

On/Sleep Mode voltage tolerance and current capability requirement. See Figure 3.

(5)

This electrical specification is specified by design.

(6)

Line Transient response requirement. See Figure 4.

(7)

Load Transient response requirement. See Figure 5.

(8)

During transient recovery, output voltage should not be oscillating.

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