LP3988 datasheet(6/25 Pages) TI1

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LP3988

SNVS161E – OCTOBER 2001 – REVISED OCTOBER 2015

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6.5 Electrical Characteristics

Unless otherwise specified: VEN = 1.8 V, VIN = VOUT + 0.5 V, CIN = 1 µF, IOUT = 1 mA, COUT = 1 µF; typical values and limits

are for TJ = 25°C, and minimum and maximum values and limits apply over the entire junction temperature range for

operation,

−40°C to +125°C.

(1) (2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

−2

−20°C ≤ TJ ≤ 125°C, SOT-23-5

–3

% of

Output voltage volerance

VOUT(NOM)

SOT-23-5

–3.5

3.5

DSBGA

–3

ΔVOUT

VIN = VOUT(NOM) + 0.5 V to 6 V

−0.15

0.15

TJ = 25°C

Line regulation error

%/V

VIN = VOUT(NOM) + 0.5 V to 6 V

–0.2

0.2

IOUT = 1 mA to 150 mA, TJ = 25°C

0.005

Load regulation error(3)

%/mA

IOUT = 1 mA to 150 mA

0.007

VIN = VOUT(NOM) + 1 V,

ƒ = 1 kHz,

IOUT = 50 mA (See Figure 11)

PSRR

Power Supply Rejection Ratio

VIN = VOUT(nom) + 1 V,

ƒ = 10 kHz, IOUT = 50 mA

(See Figure 11)

VEN = 1.4 V, IOUT = 0 mA, TJ = 25°C

120

Quiescent current

VEN = 1.4 V, IOUT = 0 to 150 mA

140

200

µA

VEN = 0.4 V

0.003

IOUT = 1 mA

Dropout voltage(4)

IOUT = 150 mA, TJ = 25°C

115

IOUT = 150 mA

150

ISC

Short circuit current limit

See(5)

600

BW = 10 Hz to 100 kHz,

Output noise voltage

220

µVRMS

COUT = 1 µF

Capacitance(6)

µF

COUT

Output capacitor

ESR(6)

500

Ω

Thermal shutdown

160

temperature

TSD

°C

Thermal shutdown hysteresis

ENABLE CONTROL CHARACTERISTICS

IEN

Maximum input current at EN

VEN = 0 V and VIN = 6 V

0.1

µA

VIL

Logic low input threshold

VIN = 2.5 V to 6 V

0.5

VIH

Logic high input threshold

VIN = 2.5 V to 6 V

1.2

(1)

All electrical characteristics having room-temperature limits are tested during production with TJ = 25°C or correlated using Statistical

Quality Control (SQC) methods. All hot and cold limits are specified by correlating the electrical characteristics to process and

temperature variations and applying statistical process control.

(2)

The target output voltage, which is labeled VOUT(NOM), is the desired voltage option.

(3)

An increase in the load current results in a slight decrease in the output voltage and vice versa.

(4)

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

(5)

Short-circuit current is measured on input supply line after pulling down VOUT to 95% VOUT(NOM).

(6)

Specified by design. Not production tested. The capacitor tolerance should be ±30% or better over the full temperature range. The full

range of operating conditions such as temperature, DC bias and even capacitor case size for the capacitor in the application should be

considered during device selection to ensure this minimum capacitance specification is met. X7R capacitor types are recommended to

meet the full device temperature range.

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