Philips lm337t DATASHEETS
The LM337 is an adjustable 3–terminal negative voltage regulator
capable of supplying in excess of 1.5 A over an output voltage range of
–1.2 V to – 37 V. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it
employs internal current limiting, thermal shutdown and safe area
compensation, making it essentially blow–out proof.
The LM337 serves a wide variety of applications including local, on card
regulation. This device can also be used to make a programmable output
regulator, or by connecting a fixed resistor between the adjustment and
output, the LM337 can be used as a precision current regulator.
• Output Current in Excess of 1.5 A
• Output Adjustable between –1.2 V and –37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Eliminates Stocking many Fixed Voltages
• A vailable in Surface Mount D
Package
2
P AK and Standard 3–Lead Transistor
Order this document by LM337/D
THREE–TERMINAL
ADJUSTABLE NEGATIVE
VOLTAGE REGULATOR
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Standard Application
I
PROG
I
Adj
R
LM337
V
out
2
+
–1.25 Vǒ1
R
120
1.0 µF
R
2
Ǔ
R
1
+
–V
out
CO**
1
V
out
)
+
Cin*
µ
F
1.0
V
–V
in
*Cin is required if regulator is located more than 4 inches from power supply filter.
*A 1.0
**CO is necessary for stability. A 1.0 µF solid tantalum or 10 µF aluminum electrolytic
**is recommeded.
in
µ
F solid tantalum or 10 µF aluminum electrolytic is recommended.
Pin 1. Adjust
2. V
3. V
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
1
ORDERING INFORMATION
Operating
Device
LM337BD2T
LM337BT
LM337D2T
LM337T
Temperature Range
TJ = –40° to +125°C
TJ = 0° to +125°C
in
out
2
3
Package
Surface Mount
Insertion Mount
Surface Mount
Insertion Mount
MOTOROLA ANALOG IC DEVICE DATA
Motorola, Inc. 1996 Rev 1
1
MAXIMUM RATINGS
Rating Symbol Value Unit
Input–Output V oltage Differential VI–V
Power Dissipation
Case 221A
TA = +25°C P
Thermal Resistance, Junction–to–Ambient θ
Thermal Resistance, Junction–to–Case θ
Case 936 (D2PAK)
TA = +25°C P
Thermal Resistance, Junction–to–Ambient θ
Thermal Resistance, Junction–to–Case θ
Operating Junction Temperature Range T
Storage Temperature Range T
JA
JC
JA
JC
stg
D
D
J
LM337
O
40 Vdc
Internally Limited W
65 °C/W
5.0 °C/W
Internally Limited W
70 °C/W
5.0 °C/W
–40 to +125 °C
–65 to +150 °C
ELECTRICAL CHARACTERISTICS (|V
Characteristics
Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ |VI–VO| ≤ 40 V 1 Reg
Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ I
|VO| ≤ 5.0 V
|VO| ≥ 5.0 V
Thermal Regulation, TA = +25°C (Note 6), 10 ms Pulse Reg
Adjustment Pin Current 3 I
Adjustment Pin Current Change, 2.5 V ≤ |VI–VO| ≤ 40 V,
10 mA ≤ IL ≤ I
Reference Voltage, TA = +25°C, 3.0 V ≤ |VI–VO| ≤ 40 V,
10 mA ≤ IO ≤ I
Line Regulation (Note 3), 3.0 V ≤ |VI–VO| ≤ 40 V 1 Reg
Load Regulation (Note 3), 10 mA ≤ IO ≤ I
|VO| ≤ 5.0 V
|VO| ≥ 5.0 V
Temperature Stability (T
Minimum Load Current to Maintain Regulation
(|VI–VO| ≤ 10 V)
(|VI–VO| ≤ 40 V)
Maximum Output Current
|VI–VO| ≤ 15 V, PD ≤ P
|VI–VO| ≤ 40 V , PD ≤ P
max
max
, PD ≤ P
, PD ≤ P
low
max
max
, TA = +25°C
max
, TJ = T
max
≤ TJ ≤ T
) 3 T
high
, T Package
, TJ = +25°C, T Package
| = 5.0 V; IO = 0.5 A for T package; TJ = T
I–VO
Figure Symbol Min Typ Max Unit
max
to T
low
high
max
2 Reg
1, 2 ∆I
3 V
2 Reg
3 I
3 I
line
load
therm
Adj
Adj
ref
line
load
S
Lmin
max
low
to T
high
[Note 1] ; I
max
and P
max
– 0.01 0.04 %/V
–
–
15
0.3
50
1.0
– 0.003 0.04 % VO/W
– 65 100 µA
– 2.0 5.0 µA
–1.213
–1.20
–1.250
–1.25
–1.287
–1.30
– 0.02 0.07 %/V
–
–
20
0.3
70
1.5
– 0.6 – % V
–
–
–
–
1.5
2.5
1.5
0.15
6.0
10
2.2
0.4
[Note 2].)
RMS Noise, % of VO, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz N – 0.003 – % V
Ripple Rejection, VO = –10 V, f = 120 Hz (Note 4)
Without C
C
Long–Term Stability, TJ = T
Endpoint Measurements
Adj
Adj
= 10 µF
(Note 5), TA = +25°C for
high
Thermal Resistance Junction–to–Case, T Package R
NOTES: 1.T
to T
low
2.I
max
3.Load and line regulation are specified at constant junction temperature. Change in VO because of heating effects is covered under the Thermal
Regulation specification. Pulse testing with a low duty cycle is used.
4.C
Adj
5.Since Long Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from
lot to lot.
6.Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These
effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients
on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
= 0° to +125°C, for LM337T, D2T. T
high
= 1.5 A, P
, when used, is connected between the adjustment pin and ground.
max
= 20 W
low
to T
= –40° to +125°C, for LM337BT, BD2T.
high
4 RR
–
66
60
77
–
–
3 S – 0.3 1.0 %/1.0 k
θJC
– 4.0 – °C/W
mV
% V
mV
% V
mA
dB
Hrs.
O
V
O
O
A
O
2
MOTOROLA ANALOG IC DEVICE DATA
LM337
Representative Schematic Diagram
600
1.0k
270
75
0
4.0k
9.6k
2.9k
60k 100k
20k
8.0k
4.0k
18k
100
2.5k
810
5.0k
800
6.0k
100k
500
This device contains 39 active transistors.
2.4k
15pF
3.0k
100pF
10k
2.2k
15
2.0k
21k
15pF
2.0k
5.0pF
5.0k
800
25pF
500
18k
240
220
155
100
30k
2.0
pF
60
250
15
Adjust
V
0.2
0.05
V
out
in
Figure 1. Line Regulation and ∆I
C
1.0 µF
in
* Pulse testing required.
1% Duty Cycle
is suggested.
*
V
EE
MOTOROLA ANALOG IC DEVICE DATA
/Line T est Circuit
Adj
R21%
+
C
1.0 µF
120
1
1%
|VOL–VOH|
|VOH|
O
R
L
V
OH
V
OL
x 100
I
Adj
Adjust
V
in
LM337
V
IH
V
IL
Line Regulation (%ńV)
R
V
out
+
3
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