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Details, datasheet, quote on part number:LM350
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| Part: | LM350 |
| Category: | Power Management => Regulators => Linear Voltage Regulators |
| Description: | Three-terminal Adjustable Output Positive Voltage Regulator |
| Company: | ON Semiconductor |
| Datasheet: | Download LM350 datasheet File size : 99 kB |
| Request For quote: | Find where to buy LM350
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Datasheet text preview:
ON Semiconductort
3.0 A, Adjustable Output, Positive Voltage Regulator
The LM350 is an adjustable threeterminal 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 blowout 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. · 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 3lead Transistor Package · Eliminates Stocking Many Fixed Voltages
Simplified Application
LM350
THREETERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR
SEMICONDUCTOR TECHNICAL DATA
T SUFFIX PLASTIC PACKAGE CASE 221A
Pin 1. Adjust 2. Vout 3. Vin
1 2 3
Heatsink surface is connected to Pin 2.
ORDERING INFORMATION
Device Vin LM350 vout R1 240 Adjust + C ** O 1µF LM350T LM350BT# Operating Temperature Range TJ = 0° to +125°C TJ = 40° to +125°C Package Plastic Power Plastic Power
IAdj Cin* 0.1µF
# Automotive temperature range selections are available with special test conditions and additional tests. Contact your local ON Semiconductor sales office for information.
R2
* = Cin is required if regulator is located an appreciable distance from power supply filter. ** = CO is not needed for stability, however, it does improve transient response. Vout + 1.25V
1 ) R2 ) IAdjR2 R1
Since IAdj is controlled to less than 100 µA, the error associated with this term is negligible in most applications.
© Semiconductor Components Industries, LLC, 2002
1
January, 2002 Rev. 2
Publication Order Number: LM350/D
LM350
MAXIMUM RATINGS
Rating InputOutput Voltage Differential Power Dissipation Operating Junction Temperature Range Storage Temperature Range Soldering Lead Temperature (10 seconds) Symbol VIVO PD TJ Tstg Tsolder Value 35 Internally Limited 40 to +125 65 to +150 300 Unit Vdc W °C °C °C
ELECTRICAL CHARACTERISTICS (VIVO = 5.0 V; IL = 1.5 A; TJ = Tlow to Thigh; Pmax [Note 1], unless otherwise noted.)
Characteristics Line Regulation (Note 2) TA = 25°C, 3.0 V VIVO 35 V Load Regulation (Note 2) TA = 25°C, 10 mA Il 3.0 A VO 5.0 V VO 5.0 V Thermal Regulation, Pulse = 20 ms, (TA = +25°C) Adjustment Pin Current Adjustment Pin Current Change 3.0 V VIVO 35 V 10 mA IL 3.0 A, PD Pmax Reference Voltage 3.0 V VIVO 35 V 10 mA IO 3.0 A, PD Pmax Line Regulation (Note 2) 3.0 V VIVO 35 V Load Regulation (Note 2) 10 mA IL 3.0 A VO 5.0 V VO 5.0 V Temperature Stability (Tlow TJ Thigh) Minimum Load Current to Maintain Regulation (VIVO = 35 V) Maximum Output Current VIVO 10 V, PD Pmax VIVO = 30 V, PD Pmax, TA = 25°C RMS Noise, % of VO TA= 25°C, 10 Hz f 10 kHz Ripple Rejection, VO = 10 V, f = 120 Hz (Note 3) Without CAdj CAdj = 10 µF Long Term Stability, TJ = Thigh (Note 4) TA= 25°C for Endpoint Measurements Thermal Resistance, JunctiontoCase Peak (Note 5) Average (Note 6) 4 3 1,2 Figure 1 2 Symbol Regline Regload Regtherm IAdj IAdj 5.0 0.1 0.002 50 0.2 25 0.5 100 5.0 mV % VO % VO/W µA µA Min Typ 0.0005 Max 0.03 Unit %/V
3
Vref
1.20
1.25
1.30
V
1 2
Regline Regload
0.02
0.07
%/V
3 3 3 TS ILmin Imax 3.0 0.25 N RR 66 3 S RJC
20 0.3 1.0 3.5
70 1.5 10
mV % VO % VO mA A
4.5 1.0 0.003
% VO dB
65 80 0.3
1.0 %/1.0 k Hrs. °C/W
2.3
1.5
NOTES: 1. Tlow to Thigh = 0° to +125°C; Pmax = 25 W for LM350T; Tlow to Thigh = 40° to +125°C; Pmax = 25 W for LM350BT 2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. 3. CAdj, when used, is connected between the adjustment pin and ground. 4. Since LongTerm 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).
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LM350
Representative Schematic Diagram
Vin 6.3V 170 6.7K 12K 5.0pF 6.8K 510 160 200 13K 6.3V
310
310
230
120
5.6K
125K
6.3V
135
12.4K
30 pF 3.6K 5.8K 5.1K 190 110
30 pF
2.4K 12.5K
105 4 0.45 Vout Adjust
VCC * VIH VIL Vin Vout
Line Regulation (%/V) =
VOH - VOL VOL
x 100 VOH VOL
LM350
IL
Adjust C in 0.1µF IAdj
R1
240 1% CO
+
RL 1µF
* Pulse Testing Required: 1% Duty Cycle is suggested.
R2 1%
Figure 1. Line Regulation and IAdj/Line Test Circuit
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