LM237K STMicroelectronics, LM237K Datasheet - Page 6

• Manufacturer Part Number: LM237K
• Description: IC VOLT REG NEG ADJ 1.5A TO-3
• Manufacturer: STMicroelectronics

Specifications of LM237K

• Regulator Topology: Negative Adjustable
• Voltage - Output: -1.2 ~ -37 V
• Number Of Regulators: 1
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-204, TO-3
• Polarity: Negative
• Number Of Outputs: 1
• Output Type: Adjustable
• Output Voltage: - 1.2 V to - 37 V
• Output Current: 1.5 A
• Line Regulation: 0.02 % / V
• Load Regulation: 0.5 %
• Input Voltage Max: 40 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 25 C
• Maximum Power Dissipation: 20000 mW
• Mounting Style: Through Hole
• Reference Voltage: - 1.275 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Input: -
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4
Table 4.
1. Although power dissipation is internally limited, these specifications are applicable for power dissipation of:
2. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output
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Symbol
|I
ΔI
V
O(min)
V
K
I
K
R
K
K
K
K
I
ADJ
15 W for TO-220 and 20 W for TO-3 Package; I
voltage due to heating effects are covered under the specification for thermal regulation.
REF
OS
ADJ
NO
VO
VO
VT
VH
VF
VI
VI
| Minimum load current
Reference voltage
Line regulation
Load regulation
Thermal regulation
Adjustment pin current
Adjustment pin current
change
Line regulation
Load regulation
Short circuit output current
RMS output noise
(% of V
Ripple rejection ratio
Temperature stability
Long term stability
Electrical characteristics
Electrical characteristics of LM137 (T
otherwise specified)
O
Parameter
)
(2)
(2)
(2)
(2)
(1)
T
T
|V
|I
T
|V
T
|I
T
T
|V
|V
|I
|V
|V
|V
|V
T
V
C
a
O
O
a
a
O
a
a
a
a
O
ADJ
I
I
I
I
I
I
I
I
| = 10mA to |I
| = 10mA to |I
| = 10mA to |I
= 25°C
= 25°C, pulse 10 ms
= 25°C, |I
= 125°C, 1000 H
= 25°C
= 25°C
= 25°C, f = 10 Hz to 10 kHz
- V
- V
- V
- V
- V
- V
- V
- V
= -10 V, f = 120 Hz
= 10 µF
O
O
O
O
O
O
O
O
O(max)
| = 3 to 40 V, T
| = 3 to 40 V
| = 3 to 40 V
| = 3 to 40 V
| ≤ 40 V
| ≤ 10 V
| ≤ 15 V
| = 40 V, T
O
Test conditions
is 1.5 A
| = 10 mA to |I
O(max)
O(max)
O(max)
J
=25°C
J
= -55 to 150 °C, V
J
| P ≤ P
|
|
= T
I
I
|V
|V
|V
|V
O
O
min
O
O
O
O
= 0.1 A
= 20 mA
O(max)
| ≤ 5 V
| ≥ 5 V
| ≤ 5 V
| ≥ 5 V
max
to T
|
max
I
- V
-1.225
Min.
0.24
-1.2
1.5
66
O
= 5 V, I
0.002
0.003
-1.25
-1.25
Typ.
0.01
0.01
0.02
0.3
0.3
2.5
1.2
2.2
0.4
0.6
0.3
15
65
20
60
77
2
O
= 0.5 A unless
-1.275
Max.
0.02
0.02
0.02
0.05
-1.3
100
0.5
25
50
5
1
5
3
1
%/W
Unit
%/V
%/V
mV
mV
mA
µA
µA
dB
%
%
%
%
%
V
A