LP3984 datasheet(4/19 Pages) TI1

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LP3984

SNVS160F – OCTOBER 2001 – REVISED OCTOBER 2013

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ELECTRICAL CHARACTERISTICS

Unless otherwise specified: VIN = 2.5V for 1.5V and 1.8V options, VIN = VOUT + 0.5 for output options higher than 2.5V, CIN = 1

µF, IOUT = 1mA, COUT = 1 µF, tantalum. 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

Symbol

Parameter

Conditions

Typ

Units

Min

Max

Output Voltage Tolerance

−1.2

1.2

% of

−2.0

2.0

VOUT(nom)

Line Regulation Error

VIN = 2.5V to 4.5V for 1.5V and 1.8V

options

0.05

−0.15

0.15

%/V

VIN = (VOUT + 0.5V) to 4.5V for Voltage

ΔVOUT

options higher than 2.5V

Load Regulation Error(3)

IOUT = 1 mA to 150 mA

0.002

0.005

LP3984IM5 (SOT-23-5)

%/mA

LP3984IBP (DSBGA)

0.0009

0.002

VIN = VOUT(nom) + 0.2V,

f = 1 kHz,

IOUT = 50 mA, Figure 4

PSRR

Power Supply Rejection Ratio

VIN = VOUT(nom) + 0.2V,

f = 10 kHz,

IOUT = 50 mA, Figure 4

Quiescent Current

VEN = 1.4V, IOUT = 0 mA

125

VEN = 1.4V, IOUT = 0 to 150 mA

110

150

µA

VEN = 0.4V

0.005

1.2

Dropout Voltage(4)

IOUT = 1 mA

0.6

2.5

IOUT = 50 mA

IOUT = 100 mA

IOUT = 150 mA

120

ISC

Short Circuit Current Limit

Output Grounded

600

(Steady State)

IOUT(PK)

Peak Output Current

VOUT ≥ VOUT(nom) - 5%

600

300

TON

Turn-On Time(5)

µs

Output Noise Voltage

BW = 10 Hz to 100 kHz,

µVrms

COUT = 1µF tant.

IEN

Maximum Input Current at EN

VEN = 0.4 and VIN = 6.0

±1

VIL

Maximum Low Level Input Voltage VIN = 2.5 to 6.0V

0.4

at EN

VIH

Minimum High Level Input Voltage VIN = 2.5 to 6.0V

1.4

at EN

COUT

Output Capacitor

Capacitance

µF

ESR

Thermal Shutdown Temperature

160

°C

TSD

Thermal Shutdown Hysteresis

°C

(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 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. This

specification does not apply for input voltages below 2.5V.

(5)

Turn-on time is time measured between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal

value.

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