LP5990

www.ti.com

SNVS438B – APRIL 2007 – REVISED DECEMBER 2007

OPERATING RATINGS

(1),(2)

VIN: Input Voltage Range

2.2V to 5.5V

VEN: Enable Voltage Range

0 to 5.5V (max)

Recommended Load Current (3)

0 to 200 mA

Junction Temperature Range (TJ)

-40°C to +125°C

Ambient Temperature Range (TA)

(3)

-40°C to +85°C

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under

which operation of the device is specified. Operating Ratings do not imply specified performance limits. For specified performance limits

and associated test conditions, see the Electrical Characteristics tables.

(2)

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

(3)

In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may

have to be derated. Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP =

125°C), the maximum power dissipation of the device in the application (PD-MAX), and the junction-to ambient thermal resistance of the

part/package in the application (

θJA), as given by the following equation: TA-MAX = TJ-MAX-OP – (θJA × PD-MAX). See applications section.

THERMAL PROPERTIES

Junction to Ambient Thermal Resistance

θJA

(1)

JEDEC Board (DSBGA) (2)

100.6°C/W

4L Cellphone Board (DSBGA)

174.8°C/W

(1)

Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power

dissipation exists, special care must be paid to thermal dissipation issues in board design.

(2)

Detailed description of the board can be found in JESD51-7

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

V

ΔVOUT

Output Voltage Tolerance

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

−1

1

%

Line Regulation

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

1

mV

mA

Load Regulation

IOUT = 1 mA to 200 mA

5

15

mV

ILOAD

Load Current

See(3)

0

mA

Maximum Output Current

200

IQ

Quiescent Current (4)

VEN = 1.0V, IOUT = 0 mA

30

75

VEN = 1.0V, IOUT = 200 mA

35

µA

VEN = <0.35V (Disabled)

0.01

VDO

Dropout Voltage(5)

IOUT = 200 mA

160

250

mV

ISC

Short Circuit Current Limit

See(6)

600

mA

PSRR

Power Supply Rejection Ratio (7)

f = 10 kHz, IOUT = 200 mA

55

dB

en

Output Noise Voltage (7)

BW = 10 Hz to 100

V OUT = 1.8V

60

μVRMS

kHz, VIN = 4.2V, IOUT =

V OUT = 2.8V

85

1 mA

TSHUTDOWN

Thermal Shutdown

Temperature

160

°C

Hysteresis

20

Enable Input Thresholds

VIL

Low Input Threshold (VEN)

VIN = 2.2V to 5.5V

0.35

V

(1)

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

(2)

Min and Max limits are specified by design, test, or statistical analysis. Typical numbers are not specified, 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 ensured by design.

Copyright © 2007, Texas Instruments Incorporated

Submit Documentation Feedback

3

Product Folder Links: LP5990