LP5990 datasheet(4/18 Pages) TI1

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LP5990

SNVS438B – APRIL 2007 – REVISED DECEMBER 2007

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Electrical Characteristics

Limits in standard typeface are for TA = 25°C. Limits in boldface type apply over the full operating junction temperature range

(-40°C

≤ TJ ≤ +125°C). Unless otherwise noted, specifications apply to the LP5990 Typical Application Circuit (pg. 1) with: VIN

= VOUT (NOM) + 1.0V, or 2.2V, whichever is higher. VEN = 1.0V, CIN = COUT = 1.0 μF, IOUT = 1.0 mA.

(1), (2)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VIN

Input Voltage

2.2

5.5

ΔVOUT

Output Voltage Tolerance

VIN = (VOUT(NOM) + 1.0V) to 5.5V

−1

Line Regulation

VIN = (VOUT(NOM) + 1.0V) to 5.5V, IOUT = 1

Load Regulation

IOUT = 1 mA to 200 mA

ILOAD

Load Current

(3)

Maximum Output Current

200

Quiescent Current (4)

VEN = 1.0V, IOUT = 0 mA

VEN = 1.0V, IOUT = 200 mA

µA

VEN = <0.35V (Disabled)

0.01

VDO

Dropout Voltage(5)

IOUT = 200 mA

160

250

ISC

Short Circuit Current Limit

(6)

600

PSRR

Power Supply Rejection Ratio

f = 10 kHz, IOUT = 200 mA

(7)

Output Noise Voltage

BW = 10 Hz to 100

V OUT = 1.8V

μVRMS

(7)

kHz, VIN = 4.2V, IOUT =

V OUT = 2.8V

1 mA

TSHUTDOWN

Thermal Shutdown

Temperature

160

°C

Hysteresis

(1)

All voltages are with respect to the potential at the GND pin.

(2)

Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the

most likely norm.

(3)

The device maintains a stable, regulated output voltage without a load current.

(4)

Quiescent current is defined here as the difference in current between the input voltage source and the load at VOUT.

(5)

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

nominal value. This parameter only applies to output voltages above 2.8V.

(6)

Short Circuit Current is measured with VOUT pulled to 0V.

(7)

This specification is guaranteed by design.

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