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LM350TG

P1-P3P4-P6P7-P9P10-P10
© Semiconductor Components Industries, LLC, 2006
August, 2006 − Rev. 4
1 Publication Order Number:
LM350/D
LM350
3.0 A, Adjustable Output,
Positive Voltage Regulator
The LM350 is an adjustable three−terminal positive voltage
regulator capable of supplying in excess of 3.0 A over an output
voltage range of 1.2 V to 33 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 LM350 serves a wide variety of applications including local,
on card regulation. This device also makes an especially simple
adjustable switching regulator, a programmable output regulator, or
by connecting a fixed resistor between the adjustment and output, the
LM350 can be used as a precision current regulator.
Features
• Guaranteed 3.0 A Output Current
• Output Adjustable between 1.2 V and 33 V
• Load Regulation Typically 0.1%
• Line Regulation Typically 0.005%/V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe Area Compensation
• Floating Operation for High Voltage Applications
• Standard 3−lead Transistor Package
• Eliminates Stocking Many Fixed Voltages
• Pb−Free Packages are Available*
Figure 1. Simplified Application
* = C
in
is required if regulator is located an appreciable distance from power supply filter.
** = C
O
is not needed for stability, however, it does improve transient response.
S
ince I
Adj
is controlled to less than 100 mA, the error associated with this term is negligible in most application
s
LM350
V
in
v
out
R
1
240
R
2
Adjust
I
Adj
C
in
*
0.1mF
+
C
O
**
1mF
V
out
+ 1.25 V
ǒ
1 )
R
2
R
1
Ǔ
) I
Adj
R
2
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques Reference
Manual, SOLDERRM/D.
TO−220
T SUFFIX
PLASTIC PACKAGE
CASE 221AB
THREE−TERMINAL
ADJUSTABLE POSITIVE
VOLTAGE REGULATOR
1
2
3
See detailed ordering and shipping information in the package
dimensions section on page 3 of this data sheet.
ORDERING INFORMATION
MARKING DIAGRAM
350T
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Device
AWLYWWG
LM
Pin 1. Adjust
2. V
out
3. V
in
Heatsink surface is connected to Pin 2.
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LM350
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2
MAXIMUM RATINGS
Rating Symbol Value Unit
Input−Output Voltage Differential V
I
−V
O
35 Vdc
Power Dissipation P
D
Internally Limited W
Operating Junction Temperature Range T
J
−40 to +125 °C
Storage Temperature Range T
stg
−65 to +150 °C
Soldering Lead Temperature (10 seconds) T
solder
300 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
ELECTRICAL CHARACTERISTICS (V
I
−V
O
= 5.0 V; I
L
= 1.5 A; T
J
= T
low
to T
high
; P
max
[Note 1], unless otherwise noted.)
Characteristics Figure Symbol Min Typ Max Unit
Line Regulation (Note 2) T
A
= 25°C, 3.0 V ≤ V
I
−V
O
≤ 35 V 1 Reg
line
− 0.0005 0.03 %/V
Load Regulation (Note 2)
T
A
= 25°C, 10 mA ≤ I
l
≤ 3.0 A
V
O
≤ 5.0 V
V
O
≥ 5.0 V
2 Reg
load
−
−
5.0
0.1
25
0.5
mV
% V
O
Thermal Regulation, Pulse = 20 ms, (T
A
= +25°C) Reg
therm
− 0.002 − % V
O
/W
Adjustment Pin Current 3 I
Adj
− 50 100 mA
Adjustment Pin Current Change
3.0 V ≤ V
I
−V
O
≤ 35 V
10 mA ≤ I
L
≤ 3.0 A, P
D
≤ P
max
1,2 DI
Adj
− 0.2 5.0 mA
Reference Voltage
3.0 V ≤ V
I
−V
O
≤ 35 V
10 mA ≤ I
O
≤ 3.0 A, P
D
≤ P
max
3 V
ref
1.20 1.25 1.30 V
Line Regulation (Note 2) 3.0 V ≤ V
I
−V
O
≤ 35 V 1 Reg
line
− 0.02 0.07 %/V
Load Regulation (Note 2)
10 mA ≤ I
L
≤ 3.0 A
V
O
≤ 5.0 V
V
O
≥ 5.0 V
2 Reg
load
−
−
20
0.3
70
1.5
mV
% V
O
Temperature Stability (T
low
≤ T
J
≤ T
high
) 3 T
S
− 1.0 − % V
O
Minimum Load Current to
Maintain Regulation (V
I
−V
O
= 35 V)
3 I
Lmin
− 3.5 10 mA
Maximum Output Current
V
I
−V
O
≤ 10 V, P
D
≤ P
max
V
I
−V
O
= 30 V, P
D
≤ P
max
, T
A
= 25°C
3 I
max
3.0
0.25
4.5
1.0
−
−
A
RMS Noise, % of V
O
T
A
= 25°C, 10 Hz ≤ f ≤ 10 kHz
N − 0.003 − % V
O
Ripple Rejection, V
O
= 10 V, f = 120 Hz (Note 3)
Without C
Adj
C
Adj
= 10 mF
4 RR
−
66
65
80
−
−
dB
Long Term Stability, T
J
= T
high
(Note 4)
T
A
= 25°C for Endpoint Measurements
3 S − 0.3 1.0 %/1.0 k
Hrs.
Thermal Resistance, Junction−to−Case
Peak (Note 5)
Average (Note 6)
R
q
JC
−
−
2.3
−
−
1.5
°C/W
1. T
low
to T
high
= 0° to +125°C; P
max
= 25 W for LM350T; T
low
to T
high
= −40° to +125°C; P
max
= 25 W for LM350BT
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
3. C
Adj
, when used, is connected between the adjustment pin and ground.
4. 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.
5. Thermal Resistance evaluated measuring the hottest temperature on the die using an infrared scanner. This method of evaluation yields very
accurate thermal resistance values which are conservative when compared to the other measurement techniques.
6. The average die temperature is used to derive the value of thermal resistance junction to case (average).
LM350
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3
ORDERING INFORMATION
Device
Operating Temperature
Range
Package Shipping
†
LM350T
T
J
= 0° to + 125 °C
TO−220 50 Units / Rail
LM350TG TO−220
(Pb−Free)
50 Units / Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
Figure 2. Representative Schematic Diagram
310 310 230 120
5.6K
V
in
170
6.3V
160
12K
5.0pF
6.8K
13K
6.3V
105
4
0.45
V
out
Adjust
12.5K
2.4K
30
pF
30
pF
6.3V
125K
135
190
12.4K3.6K
5.8K
110
5.1K
6.7K
510
200
*Pulse Testing Required:
1% Duty Cycleis suggested.
Line Regulation (%/V) =
V
OH
− V
OL
x 100
*
V
CC
V
IH
V
IL
V
in
V
out
V
OH
V
OL
R
L
+
1mFC
O
240
1%
R
1
Adjust
R
2
1%
C
in
0.1mF
LM350
I
Adj
I
L
Figure 3. Line Regulation and DI
Adj
/Line Test Circuit
V
OL
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LM350TG

Mfr. #:
Buy LM350TG
Manufacturer:
ON Semiconductor
Description:
Linear Voltage Regulators 3A 1.2-33V Positive
Lifecycle:
New from this manufacturer.
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