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978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com

Application Support: apps@hittite.com

HMC976LP3E

400mA LOW NOISE, HIGH PSRR

LINEAR VOLTAGE REGULATOR

v01.0711

Parameter

Conditions

Min

Typ

Max

Units

Output Voltage Range VR

Set by external resistors.

1.8

5.1

V

Reference Voltage VREF

Vdd = 5.5V; REF cannot source/sink

external current

1.17

V

400

mA

Output Noise Spectral Density

10 Hz

100 Hz

1 kHz

10 kHz

100 kHz

Vdd = 5.5V; VR = 5.0V

Maximum Load Current

4000

120

6

3

3

nV/rtHz

Integrated Output Noise 100 Hz to 100 kHz

1.5

µVrms

Load Regulation, VR

Vdd = 5.5V; VR=5.0V

0.01

% / mA

PSRR

1 kHz

10 kHz

100 kHz

1 MHz

10 MHz

50 MHz

Vdd = 5.5V; VR=5.0V

Maximum load current

-70

-65

-45

-35

-30

-20

dB

Output Voltage Variation vs. Package

Base Temperature

25°C to 85°C

-40°C to 25°C

Vdd = 5.5V; VR=5.0V

Maximum load current

0.005

0.005

0.01

0.01

% / °C

% / °C

Ven = Vdd = 5.5V;

Maximum Load Current

1.1

1.5

mA

Power Down Current

Vdd = 5.5V; EN = Low; Output is float-

ing (high - impedance) in Power-Down

mode

1

µA

Start-Up Transient Time

0 to 90% of final voltage

200

ms

Enable Input EN High Level

Vdd>=VEN

2

Vdd

V

Enable Input EN Low Level

Vdd>=VEN

0

0.8

V

To guarantee stability, noise and PSRR

4.7

µF

Thermal Protection Threshold Junction

Temperature

115

°C

Thermal Protection Hysteresis

10

°C

[1] The regulator does not include short-circuit protection circuitry. The outputs will withstand short-circuit conditions for a duration <10s.

[2] HMC976LP3E was designed to work with low ESR ceramic capacitors connected to pin 4 VRX.

[3] See HMC976LP3E 5.0V User Application Schematic herein