PJ79LXXCT 데이터 시트보기 (PDF) - Promax Johnton
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PJ79LXXCT Datasheet PDF : 8 Pages
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PJ79L00 Series
3-Terminal Negative Output Voltage Regulators
• PJ79L24 ELECTRICAL CHARACTERISTICS
( VI = -33V , IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, 0°C < TJ < 125°C unless otherwise noted.)
CHARACTERISTIC
SYMBOL
MIN
TYP
Output Voltage (TJ = + 25°C)
VO
- 23
- 24
Line Regulation (TJ = +25°C)
- 27 Vdc ≥VI ≥ -38 Vdc
- 28 Vdc ≥ VI ≥ -38 Vdc
REGline
--
--
--
--
Load Regulation
TJ = + 25°C, 1.0 mA ≤ IO ≤ 100 mA
1.0 mA ≤ IO ≤ 40 mA
REGload
--
--
--
--
Output Voltage
-27 Vdc ≥ VI ≥ -38 Vdc, 1.0mA ≤ IO ≤ 40 mA
VO
- 22.8
--
VI = -33 Vdc, 1.0 mA ≤ IO ≤ 70 mA
- 22.8
--
Input Bias Current
(TJ = + 25°C)
(TJ = + 125°C)
IIB
--
--
--
--
Input Bias Current Change
-28 Vdc ≥ VI ≥ -38 Vdc
1.0 mA ≤ IO ≤ 40 mA
∆IIB
--
--
--
--
Output Noise Voltage
(TA = + 25°C, 10 Hz ≤f ≤ 100 KHZ)
Vn
--
200
Ripple Rejection
(- 29 ≥ VI ≥ - 35 Vdc, f = 120 HZ , TJ = 25°C)
RR
31
47
Dropout Voltage ( IO = 40 mA, TJ = + 25°C)
|VI -VO|
--
1.7
MAX
- 25
350
300
200
100
-25.2
-25.2
6.5
6.0
1.5
0.1
--
--
--
UNIT
Vdc
mV
mV
Vdc
mA
mA
µV
dB
Vdc
APPLICATIONS INFORMATION
Design Considerations
The PJ79L00 Series of fixed voltage regulators are
designed with Thermal Overload Protection that shuts down
the circuit when subjected to an excessive power overload
condition, Internal Short-Circuit Protection that limits the
maximum current the circuit will pass.
In many low current applications, compensation capacitors
are not required. However, it is recommended that the
regulator input be bypassed with a capacitor if the regulator is
connected to the power supply filter with long
wire lengths, or if the output load capacitance is large. An
input bypass capacitor should be selected to provide good
high-frequency characteristics to insure stable operation under
all load conditions. A 0.33 µF or larger tantalum,mylar, or
other
capacitor having low internal impedance at high frequencies
should be used to minimize ground loops and lead resistance
drops since the regulator has no external sense lead.
Bypassing the output is also recommended.
FIGURE 1 - POSITIVE AND NEGATIVE REGULATOR
FIGURE 2-STANDARD APPLICATION
A common ground is required between the input and the
output voltages. The input voltage must remain typically 2.0
V above the output voltage even during the low point on the
input ripple voltage.
* = CI is required if regulator is located an appreciable
distance
from power supply filter.
** = CO improves stability and transient response.
5-8
2002/07.rev.A
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