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6 VOLT ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR
ISSUE 1 - AUGUST 1996 DEVICE DESCRIPTION
The ZSAT600 is an enhanced three terminal fixed positive 6 volt regulator. The device is designed particularly for use in Satellite receiver low noise blocks where a high degree of supply rejection is required to extended frequencies. The device has been improved to give superior performance with ripple rejection of 62dB up to 22KHz , and 37dB up to 200KHz. The device features internal circuit current limit and thermal shutdown making it almost impossible to destroy. The ZSAT600 shows performance characteristics superior to other local voltage regulators. The initial output voltage is maintained to within 2.5% with a quiescent current of typically 450A. Line and load regulation is superior to that of other devices, with load current up to a maximum 200mA. For the LNB application the regulator is offered in a surface mount SOT223 package which permits power dissipation up to 3 watts. Additionally the device can be made available in an SO8 surface mount package, as well as TO92 for through hole application.
ZSAT600
The devices are suited to local voltage regulation applications, where problems could be encountered with distributed single source regulation, as well as more general voltage regulation applications.
FEATURES
* * * * * * * * * * * * *
Enhanced ripple rejection - 62dB at 22kHz Small outline SO8 and SOT223 packages TO92 package 6 volt output Output current upto 200mA Tight initial tolerance Low quiescent current -55 to 125C temperature range No external components Internal thermal shutdown Internal short circuit current limit
APPLICATIONS
Satellite receivers Low noise blocks
SCHEMATIC DIAGRAM
Q14 Q25 Q18 Q19 Q13 Q10 Q8 Q4 Q12 R6 Q20 Q11 R7 R3 Q21 Q5 Q6 Q7 Q16 Q17 R14 Q9
Vin
Vout
R4
R5 Q1 R1 Q3
C1
R9
R13 R2
Gnd
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ZSAT600
ABSOLUTE MAXIMUM RATING
Input voltage Output Current(Io) Operating Temperature Storage Temperature 20V 200mA -55 to 125C -65 to 150C Power Dissipation (Tamb=25C) SOT223 3W(Note 3) TO92 600mW SO8 780mW(Note 3)
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25C, IO=100mA, Vin=9V
SYMBOL PARAMETER
VO
CONDITIONS
MIN. 5.85
TYP. 6
MAX. 6.15 6.24
UNITS V V
Output Voltage IO=1 to 200mA Tj=-55 to 125C Vin=8 to 20V IO=1 to 100mA Tj=-55 to 125C
5.76
5.76
6.24
V
VO VO lq lq
Line Regulation Load Regulation
Vin=8 to 20V IO=1 to 200mA IO=1 to 100mA Tj=-55 to 125C
10 5 2 450
40 25
mV mV mV A A A V rms dB
Quiescent Current
700 60 100
Quiescent Current Change IO=1 to 200mA Vin=8 to 20V Output Noise Voltage f=10Hz to 10KHz Vin=10 to 18V f=120Hz-22KHz Vin=10 to 18V f=200KHz 90
Vn
Vin /VO Ripple Rejection Vin /VO Ripple Rejection
62
37
dB
Vin VO/T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO IO=5.0mA Tj=-55 to 125C
8
7.7
V
0.18 2
mV/C V
VGI
Reverse Supply IGI=500mA Protection Diode Forward Voltage
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ZSAT600
TYPICAL CHARACTERISTICS
6.03 6.02 6.01 550
Io=5mA Vin=10V Io=0 Vin=10V
Quiescent Current (A)
500
Output Voltage (V)
6.00 5.99 5.98 5.97 5.96 5.95 5.94 -75 -25 25 75 125
450
400
350
300 -75
-25
25
75
125
Temperature (C)
Temperature (C)
Output Voltage Temperature Coefficient
Quiescent Current v Temperature
Output Voltage Deviation (V)
15 10
Input Voltage
Output Voltage Deviation (V)
Load Current
100mA
0mA
+0.2 0 -0.2
Output Voltage Deviation
Output Voltage Deviation
Vin=10V Cout=0 dIo/dt=1A/s
+0.2 0 -0.2
Io=100mA Cout=0 dVin/dt=5V/s
0
20
40
60
80
0
20
40
60
80
Time (s)
Time (us)
Line Transient Response
500
Load Transient Response
2.5
Short-Circuit Output Current (mA)
Dropout Voltage (V)
400
2.0
Io=200mA Io=100mA
300
1.5
200
Vo=0V Vin=10V
1.0
100
0.5
0 -75
-25
25
75
125
0 -75
-25
25
75
125
Temperature (C)
Temperature (C)
Peak Output Current v Temperature
Dropout Voltage v Temperature
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ZSAT600
TYPICAL CHARACTERISTICS
80 70 60 50 40 30 20 10 0 100 1.0
Io=100mA Vin=10V
Output Impedance (Ohms)
1K 10K 100K 1M
Ripple Rejection (dB)
0.1
0.01 100
1K
10K
100K
Ripple Frequency (Hz)
Frequency (Hz)
Ripple Rejection v Ripple Frequency
Output Impedance v Frequency
its temperature exceeds its design limit as might occur during external faults, short circuits etc. If the regulator is supplied from an inductive source, a large voltage transient, on the regulator input, can result should the shut down circuit operate. It is advised that a capacitor (1F or greater) should be applied across the regulator input to ensure that the maximum voltage rating of the device is not exceeded under shutdown conditions. 5. HF Stability The ZSAT600 is guaranteed stable without an input or output capacitor. However if an output capacitor is used then this should be a total value of at least 100nF and should be accompanied by an input capacitor of 200nF or greater, wired in close proximity to the regulator if stability is to be ensured.
Notes:
1. The maximum operating input voltage and output current of the device will be governed by the maximum power dissipation of the selected package. Maximum package power dissipation is specified at 25 C and must be linearly derated to zero at Tamb=125C. 2. The given data represents pulse test conditions with junction temperatures as indicated at the initiation of the test. Continuous operation of the devices with the stated conditions might exceed the power dissipation limits of the chosen package. 3. Maximum power dissipation, for the SO8 and SOT223 packages, is calculated assuming that the device is mounted on a PCB measuring 2 inches square. 4. The shut down feature of the device operates if
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ZSAT600
APPLICATIONS
Fixed Output Regulator
Adjustable Output Regulator
Input ZSR***
Output
Input ZSR***
Output
Iq Gnd Vo= Vreg + (Vreg/R1 + Iq)R2
R1
R2
Current Regulator
Gnd
Input ZSR*** R1 Output Io= (Vreg/R1) + Iq
Iq
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ZSAT600
CONNECTION DIAGRAMS SO8 Package Suffix - N8 SOT223 Package Suffix - G
Top View
Top View - Pin 4 floating or connected to pin 2
TO92 Package Suffix - C
Bottom View
ORDERING INFORMATION
Part Number ZSAT600N8 ZSAT600G ZSAT600C Package SO8 SOT223 TO92 Part Mark ZSAT600 ZSAT600 ZSAT600
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