LM4990

www.ti.com

SNAS184E – DECEMBER 2002 – REVISED MAY 2013

(1) (2)

LM4990

Units

Symbol

Parameter

Conditions

(Limits)

3

7

mA (max)

Quiescent Power Supply Current

4

10

mA (max)

Shutdown Current

(6)

0.1

2.0

µA (max)

Shutdown Voltage Input High

1.5

V

Shutdown Voltage Input Low

1.3

V

Shutdown Voltage Input High

1.5

V

Shutdown Voltage Input Low

1.3

V

Output Offset Voltage

7

50

mV (max)

9.7

k

Ω (max)

8.5

7.0

k

Ω (min)

(8

Ω)

THD+N = 1% (max); f = 1kHz

1.25

0.9

W (min)

Output Power

(4

THD+N = 1% (max); f = 1kHz

2

W

Wake-up time

100

ms

THD+N

Total Harmonic Distortion+Noise

0.2

%

+N

60 (f = 217Hz)

PSRR

Power Supply Rejection Ratio

55

dB (min)

Input terminated with 10

Ω

64 (f = 1kHz)

(1)

Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for

which the device is intended to be functional but specific performance is not ensured. Electrical Characteristics state DC and AC

electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within

the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good

indication of device performance.

(2)

All voltages are measured with respect to the ground pin, unless otherwise specified.

(3)

Typicals are measured at 25°C and represent the parametric norm.

(4)

Limits are specified to AOQL (Average Outgoing Quality Level).

(5)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

(6)

maximum of 2µA.

(7)

two 20k

Ω resistors.

(8)

The Exposed-DAP of the NGZ0010B package should be electrically connected to GND or an electrically isolated copper area. the

LM4990LD demo board has the Exposed-DAP connected to GND with a PCB area of 86.7mils x 585mils (2.02mm x 14.86mm) on the

copper top layer and 550mils x 710mils (13.97mm x 18.03mm) on the copper bottom layer.

(9)

The thermal performance of the WSON and exposed-DAP MSOP-PowerPAD packages when used with the exposed-DAP connected to

a thermal plane is sufficient for driving 4

Ω loads. The VSSOP and DSBGA packages do not have the thermal performance necessary

for driving 4

Ω loads with a 5V supply and is not recommended for this application.

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