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Zetex Semiconductors

ZSAT500 Datasheet Preview

ZSAT500 Datasheet

ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR

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5 VOLT ENHANCED POSITIVE
LOCAL VOLTAGE REGULATOR
ISSUE 1 - DECEMBER 1995
ZSAT500
DEVICE DESCRIPTION
The ZSAT500 is an enhanced three terminal
fixed positive 5 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 65dB up to 22KHz , and
40dB up to 200KHz.
The device features internal circuit current
limit and thermal shutdown making it almost
impossible to destroy. The ZSAT500 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 350µA.
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
www.DataSheet4U.com
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.
SCHEMATIC DIAGRAM
Q14
Q18
Q13
Q19
Q25
Q12
R6
Q16 Q17
R3
Q11
Q20 Q21
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 - 65dB at
22kHz
Small outline SO8 and SOT223
packages
TO92 package
5 volt output
Output current upto 200mA
Tight initial tolerance
Low quiescent current
-55 to 125°C temperature range
No external components
Internal thermal shutdown
Internal short circuit current limit
APPLICATIONS
Satellite receivers
Low noise blocks
Vin
Q9
Q4
Q5
Q10
Q8
R14
Q6 Q7
Vout
R7 R4
R5
Q1
R1
C1
Q3
R2
R9
R13
Gnd
4-299




Zetex Semiconductors

ZSAT500 Datasheet Preview

ZSAT500 Datasheet

ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR

No Preview Available !

ZSAT500
ABSOLUTE MAXIMUM RATING
Input voltage
20V
Output Current(Io)
Operating Temperature
200mA
-55 to 125°C
Storage Temperature
-65 to 150°C
Power Dissipation (Tamb=25°C)
SOT223
3W(Note 3)
TO92
600mW
SO8
780mW(Note 3)
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=9V
SYMBOL PARAMETER
CONDITIONS MIN.
VO Output Voltage
4.875
IO=1 to 200mA 4.8
Tj=-55 to 125°C
Vin=7 to 20V
IO=1 to 100mA
Tj=-55 to 125°C
4.8
VO Line Regulation
Vin=7 to 20V
VO Load Regulation
IO=1 to 200mA
IO=1 to 100mA
lq Quiescent Current
Tj=-55 to 125°C
lq Quiescent Current Change IO=1 to 200mA
Vin=7 to 20V
Vn Output Noise Voltage
Vin /VO Ripple Rejection
f=10Hz to 10KHz
Vin=8 to 18V
f=120Hz-22KHz 65
Vin /VO Ripple Rejection
Vin=8 to 18V
f=200KHz
40
Vin Input Voltage Required
To Maintain Regulation
7
VO/T Average Temperature
Coefficient of VO
IO=5.0mA
Tj=-55 to 125°C
VGI Reverse Supply
IGI=500mA
Protection Diode Forward
Voltage
TYP.
5
10
5
2
350
75
6.7
0.1
MAX.
5.125
5.2
UNITS
V
V
5.2 V
40 mV
25 mV
mV
600 µA
50 µA
100 µA
µV rms
dB
dB
V
mV/°C
2V
4-300


Part Number ZSAT500
Description ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR
Maker Zetex Semiconductors
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