HMC976 400 mA Low Noise, High PSRR Linear Voltage Regulator

The HMC976LP3E is a BiCMOS ultra low noise linear voltage regulator. The high Power Supply Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz range provides excellent rejection of any preceding switching regulator or other power supply noise. The voltage output is ideal for frequency generation subsystems including Hittite’s broad line of PLLs with integrated VCOs. The output voltage can be adjusted lower than the default value by using one external resistor.

The output can be set to 5V by grounding the HV pin. The regulator can be powered down by the TTL-compatible Enable input. The HMC976LP3E is housed in a 3x3mm QFN SMT package.

Applications

Test Instrumentation
Military Radios, Radar and ECM
Basestation Infrastructure
Ultra Low Noise Frequency Generation
Fractional-N Synthesizer Supply
Mixed-Signal Circuit Supply

Features and Benefits

High Current 400mA

Low Dropout: 300mV at 400mA Output

Ultra Low Noise: 3nV/√Hz at 10 kHz, 6nV/√Hz at 1 kHz

High Power Supply Rejection Ratio(PSRR): <60 dB at 1 kHz, <30 dB at 1 MHz

Adjustable Voltage Output: VR 1.8 to 5V at 400mA

Works with Low ESR Ceramic Capacitors

Low Power-Down Current: <1 μA

Thermal Protection

16 Lead 3 x 3 mm SMT Package: 9 mm²

Power Management

Linear Regulators

Data Sheets

Document	note
HMC976 Data Sheet	PDF 1.3 M

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
HMC976LP3E Production	16 ld QFN (3x3mm w/1.7mm ep)	OTH 50	-40 to 85C	4.82	3.9	Y
HMC976LP3ETR Production	16 ld QFN (3x3mm w/1.7mm ep)	REEL 500	-40 to 85C	4.82	3.9	Y