2.85 TO 12 VOLT FIXED POSITIVE LOCAL VOLTAGE REGULATOR
ISSUE 3 - DECEMBER 2001 DEVICE DESCRIPTION
The ZR78L 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 ZR78L 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 ZR78L devices are completely stable with no external components. The device will shut down under thermal overload conditions but as the device cools, regulation will restart.
ZR78L SERIES
FEATURES
• • • • • • • • • • •
Small outline SOT223 package SO8 package (3.3V and 5.0V) 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 ZR78L028 ZR78L03 ZR78L033 ZR78L04 ZR78L048 ZR78L05 ZR78L052 ZR78L057 ZR78L06 ZR78L07 ZR78L08 ZR78L085 ZR78L09 ZR78L10 ZR78L12 2.85V 3.0V 3.3V 4.0V 4.85V 5.0V 5.2V 5.7V 6.0V 7.0V 8.0V 8.5V 9.0V 10.0V 12.0V
4-200
ZR78L SERIES
ABSOLUTE MAXIMUM RATING
Input voltage 20V Output Current(Io) 200mA Operating Temperature -55 to 125°C Storage Temperature -65 to 150°C Power Dissipation (Tamb=25°C) SOT223 2W(Note 3) TO92 600mW S08 780mW(Note 3)
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.
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.
ZR78L028 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=6.85V
SYMBOL PARAMETER
VO
CONDITIONS
MIN. 2.78
TYP. 2.85
MAX. 2.92 2.964 2.964
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
IO=1 to 200mA τ 2.736 Vin=4.85 to 20V 2.736 IO=1 to 100mA τ
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=4.85 to 20V IO=1 to 200mA IO=1 to 100mA τ
10 5 2 350
40 25 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=4.85 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=5.85 to 18V f=120Hz 48 4.85 IO=5.0mA τ 0.1 75 62 4.55
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
τ=Tj=-55 to 125°C
ZR78L SERIES
ZR78L03 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=7V
SYMBOL PARAMETER
VO
CONDITIONS
MIN. 2.92
TYP. 3.0
MAX. 3.08 3.12 3.12
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
IO=1 to 200mA τ 2.88 Vin=5 to 20V 2.88 IO=1 to 100mA τ
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=5 to 20V IO=1 to 200mA IO=1 to 100mA τ
10 5 2 350
40 25 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=5 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=6 to 18V f=120Hz 48 5 IO=5.0mA τ 0.1 75 62 4.7
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
ZR78L033 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=7.3V
SYMBOL PARAMETER
VO
CONDITIONS IO=1 to 200mA τ Vin=5.3 to 20V IO=1 to 100mA τ
MIN. 3.218 3.168 3.168
TYP. 3.3
MAX. 3.382 3.432 3.432
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=5.3 to 20V IO=1 to 200mA IO=1 to 100mA τ
7.5 5 2 350
30 25 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=5.3 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=6.3 to 18V f=120Hz 50 5.3 IO=5.0mA τ 0.1 50 64 5
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
τ =Tj = -55 to 125 °C
ZR78L SERIES
ZR78L04 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=8V
SYMBOL PARAMETER
VO
CONDITIONS
MIN. 3.9
TYP. 4.0
MAX. 4.1 4.16 4.16
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
IO=1 to 200mA τ 3.84 Vin=6 to 20V 3.84 IO=1 to 100mA τ
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=6 to 20V IO=1 to 200mA IO=1 to 100mA τ
10 5 2 350
40 25 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=6 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=7 to 18V f=120Hz 48 6 IO=5.0mA τ 75 62 5.3 0.1
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
ZR78L048 TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=8.85V
SYMBOL PARAMETER
VO
CONDITIONS
MIN. 4.729
TYP. 4.85
MAX. 4.971 5.044 5.044
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
IO=1 to 200mA τ 4.656 Vin=6.8 to 20V 4.656 IO=1 to 100mA τ
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=6.85 to 20V IO=1 to 200mA IO=1 to 100mA τ
10 5 2 350
40 25 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=6.85 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=7.85 to 18V f=120Hz 50 6.85 IO=5.0mA τ 50 64 6.55 0.1
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
τ =Tj = -55 to 125°C
ZR78L SERIES
ZR78L10TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=14V
SYMBOL PARAMETER
VO
CONDITIONS IO=1 to 200mA τ Vin=12 to 20V IO=1 to 100mA τ
MIN. 9.75 9.6 9.6
TYP. 10
MAX. 10.25 10.4 10.4
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=12 to 20V IO=1 to 200mA IO=1 to 100mA τ
12 9 3 350
40 30 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=12 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=13 to 18V f=120Hz 43 12 IO=5.0mA τ 150 57 11.7 0.25
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
ZR78L12TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=16V
SYMBOL PARAMETER
VO
CONDITIONS IO=1 to 200mA τ Vin=14 to 20V IO=1 to 100mA τ
MIN. 11.7 11.52 11.52
TYP. 12
MAX. 12.3 12.48 12.48
UNITS V V V mV mV mV µA µA µA µV rms dB V mV/°C
Output Voltage
∆VO ∆VO lq ∆lq Vn
Line Regulation Load Regulation Quiescent Current
Vin=14 to 20V IO=1 to 200mA IO=1 to 100mA τ
12 9 3 350
40 30 600 100 100
Quiescent Current Change IO=1 to 200mA Vin=14 to 20V Output Noise Voltage f=10Hz to 10kHz Vin=15 to 18V f=120Hz 43 14 IO=5.0mA τ 150 57 13.7 0.25
∆Vin /∆VO Ripple Rejection Vin ∆VO /∆T
Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO
τ =Tj = -55 to 125 °C
ZR78L028 ZR78L03 ZR78L04 ZR78L057 ZR78L09
TYPICAL CHARACTERISTICS
3.01 3.00 5.72
ZR78L SERIES
ZR78L03
5.70
Output Voltage (V)
Output Voltage (V)
2.99 2.98
5.68
ZR78L057
5.66
Io= 5mA Vin= Vo+ 4V
Io= 5mA Vin= Vo+ 4V
4.00 3.98 3.96
2.86 2.85 2.84 2.82
ZR78L028
3.94 -50 -25 0 25 50 75 100 125
ZR78L04
-50 -25 0 25 50 75 100 125
Temperature ( °C)
Temperature ( °C)
Output Voltage Temperature Coefficient
9.08
Output Voltage Temperature Coefficient
450
ZR78L09
9.04
Io= 5mA Quiescent Current (uA) Vin= Vo+ 4V
400
Io= 0 Vin=Vo+ 4V
Output Voltage (V)
9.00
350
8.96
300
8.92 -50 -25 0 25 50 75
0
250 100 125 -50 -25 0 25 50 75
0
100 125
Temperature ( C)
Temperature ( C)
Output Voltage Temperature Coefficient
500
Quiescent Current vs. Temperature
2.5
Short-Circuit Output Current (mA)
400
2.0
Drop-Out Voltage (V)
Io=200mA
300
1.5 Io=100mA 1.0
200
100
Vo=0 Vin=10V
0.5
0 -50 -25 0 25 50 75
0
0 100 125 -50 -25 0 25 50 75
0
100 125
Temperature ( C)
Temperature ( C)
Peak Output Current vs. Temperature
Drop-Out Voltage vs. Temperature
ZR78L033 ZR78L05 ZR78L06 ZR78L08 ZR78L10
ZR78L SERIES
TYPICAL CHARACTERISTICS
8.02
5.01
ZR78L05
5.00 8.00
Output Voltage (V)
Output Voltage (V)
4.99 4.98
7.98
ZR78L08
7.96
IO = 5mA V in = V O + 4V
3.30 3.29 3.28
IO = 5mA V in = V O + 4V
6.00 5.98 5.96
ZR78L033
3.27 -50 -25 0 25 50 75 100 125 5.94
ZR78L06
-50 -25 0 25 50 75 100 125
Temperature (° C)
Temperature (° C)
Output Voltage Temperature Coefficient
10.08
Output Voltage Temperature Coefficient
450
ZR78L10
10.04
Quiescent Current (uA)
IO = 5mA V in = V O + 4V
IO = 0 V in = V O
