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Fairchild Semiconductor
Fairchild Semiconductor

LM350T Datasheet

3-Terminal 3A Positive Adjustable Voltage Regulator


LM350T Datasheet Preview


www.fairchildsemi.com
LM350
3-Terminal 3A Positive Adjustable Voltage
Regulator
Features
• Output adjustable between 1.2V and 33V
• Guaranteed 3A output current
• Internal thermal overload protection
• Load regulation (Typ: 0.1%)
• Line regulation (Typ: 0.015%/V)
• Internal short-circuit current limit
• Output transistor safe-area compensation
Description
The LM350 is an adjustable 3-terminal positive voltage
regulator capable of supplying in excess of 3.0 A over an
output voltage range of 1.2V to 33 V
TO-220
1
1. Adj 2. Output 3. Input
Internal Block Diagram
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0
Page 1

LM350
Absolute Maximum Ratings
Parameter
Input-Output Voltage Differential
Lead Temperature (Soldering, 10sec)
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Symbol
VI - VO
TLEAD
PD
TOPR
TSTG
Value
35
300
Internally limited
0 ~ +125
-65 ~ +150
Unit
VDC
°C
-
°C
°C
Electrical Characteristics
(VI-VO=5V, IO=1.5A, TJ=0°C to + 125°C; PD PDMAX, unless otherwise specified)
Parameter
Line Regulation (Note1)
Load Regulation (Note1)
Adjustment Pin Current
Adjustment Pin Current
Change
Thermal Regulation
Reference Voltage
Line Regulation
Load Regulation
Temperature Stability
Maximum Output Current
Minimum Load Current
RMS Noise, %of VOUT
Ripple Rejection
Long-Term Stability
Symbol
Conditions
Min.
Rline TA = +25°C, 3V VI -VO 35V
-
Rload
TA = +25 °C, 3V VI -VO 35V
VO 5V
VO 5V
-
IADJ
-
-
IADJ
3V VI -VO 35V,
10mA Io 3A, PD PMAX
-
REGT Pulse = 20ms, TA =+ 25°C
-
VREF 3V VI -VO 35V, 10mA I O3A,PD 30W 1.2
Rline 3.0V VI -VO 35V
-
Rload
STT
10mA I O 3.0A
VO 5.0V
VO 5.0V
TJ = 0°C to + 125°C
-
-
VI -VO 10V, PD PMAX
Io(MAX) VI -VO = 30V, PD PMAX,TA = +25°C
3.0
0.25
IL(MIN) VI -VO = 35V
-
VN 10Hz f 10KHz, TA= +25 °C
-
VO = 10V, f = 120Hz,
RR
CADJ = 0
CADJ = 10µF
66
ST TJ =+125 °C
-
Typ. Max. Unit
0.015 0.03 %/V
5 25
0.1 0.5
50 100
0.2 5.0
mV
%
µA
µA
0.002 -
1.25 1.30
0.02 0.07
%/W
V
%/W
20
0.3
1.0
4.5
1.0
3.5
0.003
65
80
0.3
70 mV
1.5 %
-%
-A
-A
10 mA
- %/Vo
-
dB
dB
1 %/
1000HR
Note:
1. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken into
account separately. Pulse testing with low duty cycle is used.
2
Page 2

Typical Perfomance Characteristics
LM350
Figure 1. Load Regulation
Figure 2. Current Limit
Figure 3. Adjustment Pin Current
Figure 4. Dropout Voltage
Figure 5. Temperature Stability
Figure 6. Minimum Load Current
3
Page 3

LM350
Typical Perfomance Characteristics (continued)
Figure 7. Ripple Rejection vs Vo
Figure 8. Ripple Rejection vs Io
Figure 9. Ripple Rejection vs Frequency
Figure 10. Output Impedance
Figure 11. Line Transient Response
4
Figure 12. Load Transient Response
Page 4
Part Number LM350T
Manufactur Fairchild Semiconductor
Description 3-Terminal 3A Positive Adjustable Voltage Regulator
Total Page 8 Pages
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