DEVICE DESCRIPTION
The ZSR Series three terminal fixed positive voltage
regulators feature internal circuit current limit and
thermal shutdown making the devices difficult to
destroy. The circuit design allows creation of any
custom voltage in the range 2.85 to 12 volts. The
devices are available in a small outline surface mount
package, ideal for applications where space saving is
important, as well as through hole TO92 style
packaging. 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.
The ZSR Series show 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. Output voltage
change, with input voltage and load current, is much
lower than competitive devices. The ZSR devices are
completely stable with no external components.
FEATURES
•Small outline SO8 and SOT223 package
•TO92 package
•2.85 to 12 Volt
•Output current up to 200mA
•Tight initial tolerance
•Low quiescent current
•-55 to 125°C temperature range
•No external components
•Internal thermal shutdown
•Internal short circuit current limit
VOLTAGE RANGE
ZSR285 2.85V
ZSR300 3.0V
ZSR330 3.3V
ZSR400 4.0V
ZSR485 4.85V
ZSR500 5.0V
ZSR520 5.2V
ZSR570 5.7V
ZSR600 6.0V
ZSR700 7.0V
ZSR800 8.0V
ZSR850 8.5V
ZSR900 9.0V
ZSR1000 10.0V
ZSR1200 12.0V
ISSUE 3 - SEPTEMBER 2001
ZSR
SERIES
2.85 TO 12 VOLT FIXED POSITIVE
LOCAL VOLTAGE REGULATOR
1
ZSR
SERIES
ABSOLUTE MAXIMUM RATING
Input voltage 20V
Output Current(Io) 200mA
Operating Temperature -55 to 125°C
Storage Temperature -65 to 150°C
ELECTRICAL CHARACTERISTICS
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=125°C.
2. The following 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.
Power Dissipation (Tamb=25°C)
SOT223 2W(Note 3)
TO92 600mW
S08 780mW(Note 3)
3. Maximum power dissipation, for the SOT223 and
SO8 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 its
temperature exceeds its design limit as might occur
during external faults, short circuits etc. If the
regulator is supplied from an inductive source then a
large voltage transient, on the regulator input, can
result should the shut down circuit operate. It is
advised that a capacitor (1µF 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.
ISSUE 3 - SEPTEMBER 2001
2
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 2.78 2.85 2.92 V
IO=1 to 200mA τ2.736 2.964 V
Vin=4.85 to 20V
IO=1 to 100mA τ2.736 2.964 V
∆VOLine Regulation Vin=4.85 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current
Change IO=1 to 200mA
Vin=4.85 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µVrms
∆Vin /∆VORipple Rejection Vin=5.85 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required
To Maintain Regulation 4.85 4.55 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
ZSR285 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=6.85V
=Tj=-55 to 125°C
ISSUE 3 - SEPTEMBER 2001
3
ZSR
SERIES
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 3.218 3.3 3.382 V
IO=1 to 200mA τ3.168 3.432 V
Vin=5.3 to 20V
IO=1 to 100mA τ3.168 3.432 V
∆VOLine Regulation Vin=5.3 to 20V 7.5 30 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=5.3 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 50 µV rms
∆Vin /∆VORipple Rejection Vin=6.3 to 18V
f=120Hz 50 64 dB
Vin Input Voltage Required To
Maintain Regulation 5.3 5 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
ZSR330 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=7.3V
=Tj=-55 to 125°C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 2.92 3.0 3.08 V
IO=1 to 200mA τ2.88 3.12 V
Vin=5 to 20V
IO=1 to 100mA τ2.88 3.12 V
∆VOLine Regulation Vin=5 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=5 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µV rms
∆Vin /∆VORipple Rejection Vin=6 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 5 4.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
ZSR300 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=7V
ZSR
SERIES
ISSUE 3 - SEPTEMBER 2001
4
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 3.9 4.0 4.1 V
IO=1 to 200mA τ3.84 4.16 V
Vin=6 to 20V
IO=1 to 100mA τ3.84 4.16 V
∆VOLine Regulation Vin=6 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current
Change IO=1 to 200mA
Vin=6 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µV rms
∆Vin /∆VORipple Rejection Vin=7 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required
To Maintain Regulation 6 5.3 V
ZSR400 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=8V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 4.729 4.85 4.971 V
IO=1 to 200mA τ4.656 5.044 V
Vin=6.8 to 20V
IO=1 to 100mA τ4.656 5.044 V
∆VOLine Regulation Vin=6.85 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current
Change IO=1 to 200mA
Vin=6.85 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 50 µV rms
∆Vin /∆VORipple Rejection Vin=7.85 to 18V
f=120Hz 50 64 dB
Vin Input Voltage Required
To Maintain Regulation 6.85 6.55 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
=Tj= -55 to 125°C
ZSR485 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=8.85V
ISSUE 3 - SEPTEMBER 2001
5
ZSR
SERIES
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 11.7 12 12.3 V
IO=1 to 200mA τ11.52 12.48 V
Vin=14to20V
IO=1 to 100mA τ11.52 12.48 V
∆VOLine Regulation Vin=14 to 20V 12 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 9
330 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=14to20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 150 µVrms
∆Vin /∆VORipple Rejection Vin=15to18V
f=120Hz 43 57 dB
Vin Input Voltage Required To
Maintain Regulation 14 13.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.25 mV/°C
ZSR1200 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=16V
τ=Tj= -55 to 125 °C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 9.75 10 10.25 V
IO=1 to 200mA τ9.6 10.4 V
Vin=12to20V
IO=1 to 100mA τ9.6 10.4 V
∆VOLine Regulation Vin=12 to 20V 12 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 9
330 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=12to20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 150 µV rms
∆Vin /∆VORipple Rejection Vin=13to18V
f=120Hz 43 57 dB
Vin Input Voltage Required To
Maintain Regulation 12 11.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.25 mV/°C
ZSR1000 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=14V
ZSR
SERIES ZSR285 ZSR300 ZSR400
ZSR570 ZSR900
ISSUE 3 - SEPTEMBER 2001
6
Thermal Resistance (˚C/W)
1m 10m 100m 10
1
0
8
16
24
32
40
48
D=0
D=0.05
D=0.1
D=0.2
D=0.5
D=1
Pulse Width(s)
Thermal Resistance v Pulse Width Thermal Resistance v Pulse Width
Thermal Resistance (˚C/W)
SOT223 PACKAGE
01020
30 40 50
-1.0
-0.5
0
+0.5
OUTPUT VOLTAGE
DEVIATION
Time (us)
Line Transient Response
INPUT VOLTAGE
I
O
= 100mA
C
OUT
= 0
dV
IN
/dt = 5V/µs
(V + 9)
(V + 4)
O
O
01020
30 40 50
-1.0
-0.5
0
+0.5
0
OUTPUT VOLTAGE
DEVIATION
LOAD CURRENT
Time (us)
Output Voltage Deviation (V)
Load Transient Response
V
IN
= V
o
+ 4V
C
OUT
= 0
dI
o
/dt = 1A/µs
100 mA
0
10
20
30
40
50
60
70
80
90
10 100 1K 10K 100K
Ripple Frequency (Hz)
Ripple Rejection (dB)
I
o
= 100mA
V
in
= V
out
+ 3V
D
V
in
= 200mV p/p
ZSR285
ZSR400
ZSR570
ZSR900
100 1K 10K 100K
10
1.0
0.1
0.01
ZSR900
ZSR570
ZSR400
ZSR285
Frequency (Hz)
Output Impedance (Ohms)
I
o
= 100mA
V
IN
= V
OUT
+ 4V
Output Impedance v Frequency Ripple Rejection v Ripple Frequency
ZSR300
ZSR300
Pulse Width (s)
0
20
40
60
80
100
120
140
160
D=0
D=0.05
D=0.1
D=0.2
D=0.5
D=1
TO92 PACKAGE
10m 100m 101m 1
0
Output Voltage Deviation (V)
TYPICAL CHARACTERISTICS
ZSR
SERIES
ZSR285 ZSR300 ZSR400
ZSR570 ZSR900
ISSUE 3 - SEPTEMBER 2001
7
-50 -25 025 50 75 100 125
Temperature (˚C)
Short-Circuit Output Current (mA)
Peak Output Current v Temperature
500
400
300
200
100
0
-50 -25 025 50 75 100 125
Temperature (˚C)
Io=100mA
Io=200mA
2.5
2.0
1.5
1.0
0.5
0
Drop-Out Voltage (V)
Drop-Out Voltage v Temperature
-50 -25 025 50 75 100 125
Temperature (˚C)
450
400
350
300
250
Quiescent Current (µA)
Quiescent Current v Temperature
Io= 0
Vin=Vo+ 4V
-50 -25 025 50 75 100 125
Temperature (˚C)
Output Voltage Temperature Coefficient
9.08
9.04
9.00
8.96
8.92
Vin= Vo+ 4V
Io= 5mA
-50 -25 025 50 75 100 125
2.85
2.82
Temperature (˚C)
Output Voltage Temperature Coefficient
2.84
2.86
5.70
5.66
-50 -25 025 50 75 100 125
Temperature (˚C)
Output Voltage (V)
Output Voltage Temperature Coefficient
4.00
3.96 ZSR400
ZSR570
3.98
3.94
5.68
5.72
ZSR900
2.99
3.00
3.01
2.98
ZSR285
ZSR300
Io= 5mA
Vin= Vo+ 4V
Io= 5mA
Vin= Vo+ 4V
Vo=0
Vin=10V
Output Voltage (V)Output Voltage (V)
TYPICAL CHARACTERISTICS
ZSR
SERIES
ISSUE 3 - SEPTEMBER 2001
8
SYMBOL PARAMETER CONDITIONS MIN. Typ. MAX. UNITS
VOOutput Voltage 5.557 5.7 5.843 V
IO=1 to 200mA τ5.47 5.93 V
Vin=7.7 to 20V
IO=1 to 100mA τ5.47 5.93 V
∆VOLine Regulation Vin=7.7 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 7
2.5 30 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=7.7 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 90 µV rms
∆Vin /∆VORipple Rejection Vin=8.7 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 7.7 7.4 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.15 mV/°C
ZSR570 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=9.7V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 5.85 6 6.15 V
IO=1 to 200mA τ5.76 6.24 V
Vin=8 to 20V
IO=1 to 100mA τ5.76 6.24 V
∆VOLine Regulation Vin=8 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 7
2.5 30 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=8 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 90 µV rms
∆Vin /∆VORipple Rejection Vin=9 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 8 7.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.15 mV/°C
ZSR600 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=10V
τ=Tj= -55 to 125 °C
ISSUE 3 - SEPTEMBER 2001
9
ZSR
SERIES
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 5.070 5.2 5.330 V
IO=1 to 200mA τ4.99 5.41 V
Vin=7.2 to 20V
IO=1 to 100mA τ4.99 5.41 V
∆VOLine Regulation Vin=7.2 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=7.2 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µV rms
∆Vin /∆VORipple Rejection Vin=8.2 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 7.2 6.9 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
ZSR520 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=9.2V
=Tj= -55 to 125 °C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 4.875 5 5.125 V
IO=1 to 200mA τ4.8 5.2 V
Vin=7 to 20V
IO=1 to 100mA τ4.8 5.2 V
∆VOLine Regulation Vin=7 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=7 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µVrms
∆Vin /∆VORipple Rejection Vin=8 to 18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 7 6.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.1 mV/°C
ZSR500 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=9V
ZSR
SERIES
ISSUE 3 - SEPTEMBER 2001
10
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 8.775 9.0 9.225 V
IO=1 to 200mA τ8.64 9.36 V
Vin=11 to 20V
IO=1 to 100mA τ8.64 9.36 V
∆VOLine Regulation Vin=11 to 20V 12 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 9
330 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=11to20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 150 µV rms
∆Vin /∆VORipple Rejection Vin=12to18V
f=120Hz 43 57 dB
Vin Input Voltage Required To
Maintain Regulation 11 10.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.25 mV/°C
ZSR900 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=13V
=Tj= -55 to 125°C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 8.288 8.5 8.712 V
IO=1 to 200mA τ8.16 8.84 V
Vin=10to20V
IO=1 to 100mA τ8.16 8.84 V
∆VOLine Regulation Vin=10.5 to 20V 11 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 8
330 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=10.5 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 115 µVrms
∆Vin /∆VORipple Rejection Vin=11.5 to 18V
f=120Hz 44 60 dB
Vin Input Voltage Required To
Maintain Regulation 10.5 10.2 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.25 mV/°C
ZSR850 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=12.5V
ISSUE 3 - SEPTEMBER 2001
ZSR
SERIES
ZSR330 ZSR500 ZSR600
ZSR800 ZSR1000
11
TYPICAL CHARACTERISTICS
ZSR
SERIES ZSR330 ZSR500 ZSR600
ZSR800 ZSR1000
ISSUE 3 - SEPTEMBER 2001
12
4-38
TYPICAL CHARACTERISTICS
ISSUE 3 - SEPTEMBER 2001
13
ZSR
SERIES
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 7.8 8 8.2 V
IO=1 to 200mA τ7.68 8.32 V
Vin=10to20V
IO=1 to 100mA τ7.68 8.32 V
∆VOLine Regulation Vin=10 to 20V 11 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 8
330 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=10to20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 115 µVrms
∆Vin /∆VORipple Rejection Vin=11to18V
f=120Hz 44 60 dB
Vin Input Voltage Required To
Maintain Regulation 10 9.7 V
∆VO/∆TAverage Temperature
Coefficient of VO
IO=5.0mA τ0.25 mV/°C
ZSR800 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=12V
=Tj= -55 to 125°C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS
VOOutput Voltage 6.825 7 7.175 V
IO=1 to 200mA τ6.72 7.28 V
Vin=9 to 20V
IO=1 to 100mA τ6.72 7.28 V
∆VOLine Regulation Vin=9 to 20V 10 40 mV
∆VOLoad Regulation IO=1 to 200mA
IO=1 to 100mA 5
225 mV
mV
lqQuiescent Current τ350 600 µA
∆lqQuiescent Current Change IO=1 to 200mA
Vin=9 to 20V 100
100 µA
µA
VnOutput Noise Voltage f=10Hz to 10kHz 75 µVrms
∆Vin /∆VORipple Rejection Vin=10to18V
f=120Hz 48 62 dB
Vin Input Voltage Required To
Maintain Regulation 9 8.7 V
∆VO/∆TAverage Temperature
Coefficient of VOIO=5.0mA τ0.1 mV/°C
ZSR700 TEST CONDITIONS (Unless otherwise stated): Tj=25°C, IO=100mA, Vin=11V
ISSUE 3 - SEPTEMBER 2001
14
ZSR
SERIES ZSR485 ZSR520 ZSR700
ZSR850 ZSR1200
4-38
Output Voltage Temperature Coefficient
Temperature (°C)
025 7550
Output Voltage (V)
-50 -25 100125
4.90
5.15
5.20
5.25
4.80
4.85
Io = 10mA
Vin = Vout + 4v
ZSR520
ZSR485
Output Voltage Temperature Coefficient
Temperature (°C)
025 7550-50 -25 100125
7.10
8.55
8.45
8.50
6.90
7.00
Output Voltage Temperature Coefficient
Temperature (°C)
025 7550
Output Voltage (V)
-50 -25 100125
12.10
12.00
11.90
12.05
11.95
Io = 10mA
Vin = Vout + 4v
ZSR1200
Quiescent Current v Temperature
Temperature (°C)
025 7550-50 -25 100125
500
450
400
350
300
Peak Output Current v Temperature
Temperature (°C)
025 7550
0
Short-circuit Output Current (mA)
100
500
400
300
200
-50 -25 100125
Vo= 0
Vin= 10v
Drop-Out Votlage v Temperature
Temperature (°C)
025 7550
0
0.5
2.5
2.0
1.5
1.0
-50 -25 100125
Vo= 0
Vin= 10v
Io = 10mA
Vin = Vout + 4v
ZSR850
ZSR700
TYPICAL CHARACTERISTICS
CONNECTION DIAGRAMS
ISSUE 3 - SEPTEMBER 2001
15
ZSR
SERIES
SO8 Package Suffix –N8
Top View
TO92 Package Suffix –C
Bottom View
SOT223 Package Suffix –G
Top View –
Connect pin 4 to pin 2 or leave pin 4
electrically isolated
Part No Package Partmark
ZSR sC TO92 ZSR s
ZSR sG SOT223 ZSR s
ZSR sN8 SO8 ZSR s
sVoltage Option
eg 3V device in TO92 package
part number ZSR300C
part marked ZSR300 *
eg 12V device in SOT223 package
part number ZSR1200G
part marked ZSR1200 *
eg 5V device in SO8 package
part number ZSR500N8
part marked ZSR500 *
ORDERING INFORMATION
Voltage Voltage
Option s
TO92 SOT223 SO8
2.85V 285 33 3
3.0V 300 33 3
3.3V 330 33 3
4.0V 400 33 3
4.85V 485 33 3
5.0V 500 33 3
5.2V 520 33 3
5.7V 570 33 3
6.0V 600 33 3
7.0V 700 33 3
8.0V 800 33 3
8.5V 850 33 3
9.0V 900 33 3
10.0V 1000 33 3
12.0V 1200 33 3
OPTIONS
* NOTE: Exception. ZSR1000 part mark
is ZSR100 for all package options
ZSR
SERIES
ISSUE 3 - SEPTEMBER 2001
16
Q14
Q16 Q17
Q11
R7 R4
R3
Q18 Q19
R5
Q20
Q13
Q25
Q4
Q5
Q1
R1 Q3
C1
Q6 Q7
R2
Q8
R14
Q10
R9
R13
V
in
V
out
Gnd
R6
Q9
Q12
Q21
SCHEMATIC DIAGRAM
FixedOutputRegulator AdjustableOutputRegulator
Input Output
Gnd
ZR78L*** Input Output
Gnd
ZR78L***
R1
R2
Iq
Vo=Vreg+(V reg/R1+Iq)R2
CurrentRegulator
Input
Output
ZR78L***
R1
Iq
IO=(Vreg/R1) + 1q
APPLICATIONS
ISSUE 3 - SEPTEMBER 2001
ZSR
SERIES
17
ZSR485 ZSR520 ZSR700
ZSR850 ZSR1200
4-
Line Transient Response
Time (µs)
20 30 5040
Output Voltage Deviation (V)
+0.2
0
010
-0.2
Vo+4
Vo+9
Io= 100mA
Cout= 0
dVin/dt= 5v/us
Input
Voltage
Output Voltage
Deviation
Load Transient Response
Time (us)
20 30 5040
Output Voltage Deviation (V)
+0.2
0
010
-0.2
0
100mA Load Current
Output Voltage
Deviation
Vin= Vout+4v
Cout= 0
dIo/dt= 1A/us
Thermal Resistance v Pulse Width
Pulse Width (s)
1m 100m
0
60
110
10m
20
40
80
100
120
140
160 D=1
D=0.5
D=0.2
D=0.1
D=0.05
D=0
TO92 PACKAGE
Thermal Resistance v Pulse Width
Pulse Width (s)
1m 100m
Thermal Resistance (°C/W)
0
24
110
10m
8
16
32
40
48
SOT223 PACKAGE
D=1
D=0.5
D=0.2
D=0.1
D=0.05
D=0
Output Impedance v Frequency
Frequency (Hz)
10 1k
Output Impedance (Ohms)
0.01
10
10k 100k
100
0.1
1
Io= 100mA
Vin= Vout+4v
ZSR1200
ZSR850
ZSR700
ZSR520
ZSR485
Ripple Rejection v Ripple Frequency
Frequency (Hz)
100 10k
Open Loop Gain (dB)
0
50
100k 1M
1k
40
30
20
10
70
60
80
90
ZSR485
ZSR520
ZSR700
ZSR850
ZSR1200
Io= 100mA
Vin= Vout+4v
Vin= 200mV Pk/Pk
Thermal Resistance (°C/W)
TYPICAL CHARACTERISTICS
ISSUE 3 - SEPTEMBER 2001
18
Zetex plc
Fields New Road
Chadderton
Oldham, OL9 8NP
United Kingdom
Telephone (44) 161 622 4422
Fax: (44) 161 622 4420
Zetex GmbH
Streitfeldstraße 19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
Zetex Inc
Suite 315
700 Veterans Memorial Highway
Hauppauge NY11788
USA
Telephone: (631) 360 2222
Fax: (631) 360 8222
Zetex (Asia) Ltd
3701-04 Metroplaza, Tower 1
Hing Fong Road
Kwai Fong, Hong Kong
China
Telephone: (852) 26100 611
Fax: (852) 24250 494
These offices are supported by agents and distributors in major countries world-wide.
This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or
reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services
concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or
service.
For the latest product information, log on to www.zetex.com
© Zetex plc 2001
ZSR
SERIES
Thermal Resistance v Pulse Width
Pulse Width (s)
1m 100m
Thermal Resistance (˚C/W)
0
60
11010m
20
40
80
100
120
140
160
SO8 PACKAGE
D=0.2
D=0.1
D=0.05
D=0
Power dissipation Derating
Ambient Temperature (˚C)
-50 0
Maximum Power Dissipation (W)
0
1.0
25 50
-25
0.8
0.6
0.4
0.2
1.4
1.2
1.6
1.8
75 100125
2.0 SOT223
SO8
TO92
100µ 100
D=1
D=0.5
TYPICAL CHARACTERISTICS
