HMC860LP3E Datasheet, PDF (1/10 Pages) Analog Devices – Test Instrumentation

v01.0811
Typical Applications
The HMC860LP3E is ideal for:
• Test Instrumentation
• Military Radios, Radar and ECM
• Basestation Infrastructure
• Ultra Low Noise Frequency Generation
• Fractional-N Synthesizer Supply
• Mixed-Signal Circuit Supply
HMC860LP3E
QUAD LOW NOISE HIGH PSRR
LINEAR VOLTAGE REGULATOR
Features
Ultra Low Noise:
3nV/√Hz at 10 kHz, 7nV/√Hz at 1 kHz
High Power Supply Rejection Ratio (PSRR)
80 dB at 1 kHz, 60 dB at 1 MHz
Four Voltage Outputs:
VR1 @ 3V / 80 mA
VR2, VR3 @ 3V / 20 mA
VR4 @ 4.5V / 120 mA
Adjustable Outputs: 2.5V to 5.2V
Low Power-Down Current: <1 µA
16 Lead 3x3 mm SMT Package: 9mm²
Functional Diagram
9
General Description
The HMC860LP3E is a BiCMOS ultra low noise
quad-output voltage regulator. It features a low noise
band-gap reference externally decoupled for best
in-close noise performance. High Power Supply
Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz
range provides excellent rejection of preceding
switching regulator noise. The four voltage outputs are
ideal for frequency generation subsystems including
Hittite’s broad line of PLLs with Integrated VCOs.
Each output voltage can be adjusted higher or
lower than the default value by using one external
resistor. Each output can be set to 5V by grounding
the corresponding HV pin. The regulator can be
powered down by the TTL-compatible Enable input.
The HMC860LP3E is housed in a 3x3mm QFN SMT
package.
9-1
Electrical Specifications, T_A = +25 °C
Parameter
Conditions
Min
Typ
Default Output Voltage VR1, VR2, VR3
Vdd = 5.5V; Maximum load current
3
3.05
Default Output Voltage VR4
Vdd = 5.5V; Maximum load current
4.4
4.5
Output Voltage Tolerance
Vdd = 5.5V; Maximum load current
Input Voltage Range (Default)
Default output voltage configuration
4.8
Input Voltage Range
E.g.: VR1 = VR2 = VR3 = VR4 = 3.05V; Max (VRx) +
Vdd, min = 3.35V
0.3V
Output Voltage Range VR1 to VR4
Set by external resistors.
Vdd = Max(VRx)+0.3V
2.5
Max
Units
3.1
V
4.6
V
2
%
5.6
V
5.6
V
5.2
V
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