HMC976LP3E
v01.0711
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Features
High Output Current: 400mA
Low Dropout: 300mV at 400mA Output and VR>3V
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
Designed to work with low ESR ceramic capacitors
Low Power-Down Current: <1 µA
Thermal Protection
16 Lead 3x3 mm SMT Package: 9mm²
Typical Applications
The HMC976LP3E is ideal for:
• Test Instrumentation
• Military Radios, Radar and ECM
• Basestation Infrastructure
• Ultra Low Noise Frequency Generation
• Fractional-N Synthesizer Supply
• Microwave VCO Supply
• Mixed-Signal Circuit Supply
• Low Noise Baseband Circuit Supply
Functional Diagram
General Description
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.
9
POWER CONDITIONING - SMT
Table 1. Electrical Specifications, TA = +25 °C
Parameter
Output Voltage VR (Default)
Output Voltage VR (5V setting)
Output Voltage Tolerance
Input Voltage Range (Default)
Input Voltage Range
Input Voltage Range
Conditions
Vdd = 5.5V; Maximum load current
Vdd = 5.5V; Maximum load current
Vdd = 5.5V; Maximum load current;
Default and 5V setting
Default output voltage configuration
VR>3V
[1]
VDD>VR+0.3V
VR<3V
[1]
5.1
3.3
3.3
Min
4.7
4.9
Typ
4.8
5
Max
4.9
5.1
2
5.5
5.5
5.5
Units
V
V
%
V
V
V
[1] See Absolute Maximum Ratings Table “Absolute
Maximum Ratings”
9-1
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: apps@hittite.com
HMC976LP3E
v01.0711
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Table 1. Electrical Specifications
(Continued)
Parameter
Output Voltage Range VR
Reference Voltage VREF
Output Current VR
[1]
Output Noise Spectral Density
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
Integrated Output Noise 100 Hz to 100 kHz
Load Regulation, VR
PSRR
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz
50 MHz
Output Voltage Variation vs. Package
Base Temperature
25°C to 85°C
-40°C to 25°C
Current Consumption (I
GND
)
Conditions
Set by external resistors.
Vdd = 5.5V; REF cannot source/sink
external current
T
A
= -40°C to +85°C
Vdd = 5.5V; VR = 5.0V
Measured on Application Schematic
[3]
Maximum Load Current
Vdd = 5.5V; VR = 5.0V
[3]
Vdd = 5.5V; VR=5.0V
-70
-65
-45
-35
-30
-20
4000
120
6
3
3
1.5
0.01
Min
1.8
1.17
400
Typ
Max
5.1
Units
V
V
mA
nV/rtHz
µVrms
% / mA
Vdd = 5.5V; VR=5.0V
Maximum load current
dB
Vdd = 5.5V; VR=5.0V
Maximum load current
Ven = Vdd = 5.5V;
Maximum Load Current
Vdd = 5.5V; EN = Low; Output is float-
ing (high - impedance) in Power-Down
mode
0 to 90% of final voltage
Vdd = 5.5V
[3]
Vdd>=VEN
Vdd>=VEN
To guarantee stability, noise and PSRR
performance
[3]
2
0
4.7
0.005
0.005
1.1
0.01
0.01
1.5
% / °C
% / °C
mA
9
POWER CONDITIONING - SMT
9-2
Power Down Current
1
µA
Start-Up Transient Time
Enable Input EN High Level
Enable Input EN Low Level
Output Load Capacitance
[2]
200
Vdd
0.8
ms
V
V
µF
Thermal Protection Threshold Junction
Temperature
Thermal Protection Hysteresis
115
10
°C
°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
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: apps@hittite.com
HMC976LP3E
v01.0711
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Vout=3.3V Output Noise Spectral Density
[2]
10
-5
Vout=5V Output Noise Spectral Density
[1]
10
-5
-6
NOISE VOLTAGE (V/rtHz)
10
C3=1uF
C2=10uF
C3=1uF
C2=1uF
NOISE VOLTAGE (V/rtHz)
10
-6
10
-7
10
-7
C3=4.7uF
C2=4.7uF
10
-8
10
-8
10
-9
C3=4.7uF
C2 =4.7uF
10
-9
C3=4.7uF
C2=10uF
10
3
10
-10
10
1
10
2
10
4
10
5
10
6
10
7
10
8
10
-10
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
FREQUENCY (Hz)
FREQUENCY (Hz)
Vout 4.8V PSRR vs. Vin-Vout
[3]
-20
Vout=3.3V PSRR vs. Vin-Vout
[2]
-20
VIN-VOUT=0.5V
-30
-40
PSRR (dB)
-50
-60
-70
VIN-VOUT=0.25V
9
PSRR (dB)
-30
VIN-VOUT=0.4V
-40
POWER CONDITIONING - SMT
-50
VIN-VOUT=0.6V
-60
VIN-VOUT=0.8V
VIN-VOUT=0.8V
VIN-VOUT=1.0V
VIN-VOUT=1.7V
-70
-80
-90
2
10
-80
2
10
10
3
10
4
10
5
10
6
10
7
10
8
10
3
10
4
10
5
10
6
10
7
10
8
FREQUENCY (Hz)
FREQUENCY (Hz)
Vout and Vref vs. Temperature
[1]
4.975
VREF
1.175
Vout vs. Vin vs. Temperature
[1]
5.00
25C
0.6
4.90
85C
-40
4.80
0.4
VIN-VOUT (V)
0.5
4.970
1.170
VOUT (V)
VOUT (V)
4.965
VR
4.960
1.165
VREF (V)
4.70
0.3
1.160
4.60
0.2
4.955
1.155
4.50
0.1
4.950
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
1.150
4.40
4
4.2
4.4
4.6
4.8
5
5.2
5.4
5.6
0
TEMPERATURE (°C)
INPUT VOLTAGE (V)
[1] VDD=5.5V,400mA Load see
“HMC976LP3E 5V User Application Schematic”.
[2] VDD=5.0V,400mA Load see
“HMC976LP3E 3.3V User Application Schematic”.
[3] VDD=5.5V,400mA Load see
“HMC976LP3E 4.8V User Application Schematic”.
9-3
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: apps@hittite.com
HMC976LP3E
v01.0711
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Output Load Switched ON to OFF
[1]
500
Output Load Switched OFF to ON
[1]
5.08
5.08
500
5.04
400
5.04
CURRENT (mA)
VR Output
400
CURRENT (mA)
OUTPUT (V)
OUTPUT (V)
5.00
300
5.00
300
4.96
VR Output
200
4.96
200
4.92
CURRENT
4.88
-5
100
4.92
CURRENT
100
0
0
5
10
15
20
25
30
35
40
45
TIME (ms)
4.88
-5
0
0
5
10
15
20
25
TIME (ms)
30
35
40
45
Supply Turn-On Transient
[2]
4.00
3.50
3.00
OUTPUT (V)
2.50
2.00
1.50
1.00
0.500
0.00
-50
VR Output
ENA
4.00
3.50
3.00
Supply Turn-Off Transient
[2]
4.00
3.50
3.00
OUTPUT (V)
2.50
2.00
1.50
1.00
0.500
0.00
-0.200
VR Output
ENA
4.00
3.50
3.00
2.50
ENA (V)
9
POWER CONDITIONING - SMT
9-4
2.50
ENA (V)
2.00
1.50
1.00
0.500
0.00
450
2.00
1.50
1.00
0.500
0.00
0.800
0
50
100
150
200
250
300
350
400
0.00
0.200
0.400
TIME (s)
0.600
TIME (ms)
HMC976LP3E Output Noise Spectral
Density vs. Commercial PSU
[1]
10
-5
Vout vs. Load current
[1]
5.050
10
NOISE VOLTAGE (V/rtHz)
-6
Commercial PSU Output
Input to regulator
5.030
10
-8
VOUT (V)
HMC976LP3E Output
10
-7
5.010
4.990
10
-9
4.970
10
-10
4.950
1
10
10
2
10
3
10
10
FREQUENCY (Hz)
4
5
10
6
10
7
10
8
0
50
100
150
200
250
300
350
400
LOAD CURRENT mA
[1] VDD=5.5V, 400mA Load
“HMC976LP3E 5V User Application Schematic”.
[2] VDD=5.0V, 400mA Load
“HMC976LP3E 3.3V User Application Schematic”
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: apps@hittite.com
HMC976LP3E
v01.0711
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Table 2. Absolute Maximum Ratings
Vdd to GND Voltage
EN to GND Voltage
RDx / HVx to GND Voltage
Maximum Dissipation
Thermal Resistance
(Junction to Ambient)
Maximum Junction Temperature
Max Output Current
Storage Temperature
Operating Temperature
ESD Sensitivity (HBM)
+5.8V / -0.3V
+5.8V /-0.3V
+5.8V / -0.3V
780mW
51.5 °C/W
+125 °C
420 mA
-65 to +150 °C
-40 to +85 °C
Class 1C
Stresses above those listed under Absolute Maximum
Ratings may cause permanent damage to the device. This
is a stress rating only; functional operation of the device
at these or any other conditions above those indicated in
the operational section of this specification is not implied.
Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. The absolute
maximum ratings apply individually only, not in combination.
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
9
POWER CONDITIONING - SMT
NOTES:
[1] PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED PLASTIC
SILICA AND SILICON IMPREGNATED.
[2] LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY.
[3] LEAD AND GROUND PADDLE PLATING: 100% MATTE TIN.
[4] DIMENSIONS ARE IN INCHES [MILLIMETERS].
[5] LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
[6] PAD BURR LENGTH SHALL BE 0.15mm MAX. PAD BURR HEIGHT SHALL
BE 0.25m MAX.
[7] PACKAGE WARP SHALL NOT EXCEED 0.05mm
[8] ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO
PCB GROUND.
[9] REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB LAND
PATTERN.
Table 3. Package Information
Part Number
HMC976LP3E
Package Body Material
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
100% matte Sn
MSL Rating
MSL1
[2]
Package Marking
[1]
976
XXX
X
[1] 4-Digit lot number XXXX
[2] Max peak reflow temperature of 260 °C
9-5
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com
Application Support: apps@hittite.com
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