|
|
Part: 06F9419
Category:
Power Management
-> Regulators
-> Voltage Regulators
Description: Ic-adj. Voltage Regulator
Company:
Datasheet: Download 06F9419 datasheet File size : 214 kB
Request For quote: Find where to buy 06F9419
Datasheet text preview:
Order this document by LM350/D
LM350 Three-Terminal 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
THREETERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR
SEMICONDUCTOR TECHNICAL DATA
T SUFFIX PLASTIC PACKAGE CASE 221A
· · · · · · · · ·
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
1 2 3
Pin 1. Adjust 2. Vout 3. Vin
Heatsink surface is connected to Pin 2.
Simplified Application
Vin vout R1 240 IAdj Cin* 0.1µF R2 Adjust + C ** O 1µF
LM350
ORDERING INFORMATION
Device * = 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 Operating Temperature Range TJ = 0° to +125°C TJ = 40° to +125°C Package Plastic Power Plastic Power
+ 1.25 V ) R2 R1
1)
LM350T LM350BT#
IAdj R2
Since IAdj is controlled to less than 100 µA, the error associated with this term is negligible in most applications.
# Automotive temperature range selections are available with special test conditions and additional tests. Contact your local Motorola sales office for information.
© Motorola, Inc. 1996 Rev 0
MOTOROLA ANALOG IC DEVICE DATA
1
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).
2
MOTOROLA ANALOG IC DEVICE DATA
LM350
Representative Schematic Diagram
Vin 310 310 230 120 5.6K 6.3V 170 6.7K 12K 5.0pF 6.8K 510 160 200 13K 6.3V
125K
6.3V
135
12.4K
30 pF 3.6K 5.8K 5.1K 110
30 pF
2.4K 12.5K
105 4
190
0.45 Vout Adjust
Figure 1. Line Regulation and IAdj/Line Test Circuit
VCC Line Regulation (%/V) = * VIH VIL Vin LM350 Vout IL VOH VOL x 100 VOL VOH VOL
Adjust Cin 0.1µF IAdj
R1
240 1% CO
RL + 1µF
* Pulse Testing Required: 1% Duty Cycle is suggested.
R2 1%
MOTOROLA ANALOG IC DEVICE DATA
3
LM350
Figure 2. Load Regulation and IAdj/Load Test Circuit
Load Regulation (% VO) = VO (min Load) VO (max Load) X 100 VO (min Load) Load Regulation (mV) = VO (min Load) VO (max Load) Vout IL RL (max Load) * + IAdj CO 1.0µF
Vin
Vin
VO (min Load) VO (max Load)
LM350
Adjust Cin 0.1µF
R1
240 1%
RL (min Load)
R2 1% * Pulse Testing Required: 1% Duty Cycle is suggested.
Figure 3. Standard Test Circuit
Vin Vout LM350
IL
Adjust VI Cin 0.1µF R1 IAdj
240 1%
Vref + CO 1.0µF
RL VO
ISET R2 1% To Calculate R2: Vout = ISET R2 + 1.250 V Assume ISET = 5.25 mA
Pulse Testing Required: 1% Duty Cycle is suggested.
Figure 4. Ripple Rejection Test Circuit
24V 14V f = 120 Hz Vin LM350 Vout IL Vout = 10 V
Adjust Cin 0.1µF
R1
240 1%
D1 * 1N4002 + CO 1.0µF
RL VO
R2
1.65K 1%
** CAdj
+
10µF
* D1 Discharges CAdj if Output is Shorted to Ground. **CAdj provides an AC ground to the adjust pin.
4
MOTOROLA ANALOG IC DEVICE DATA
LM350
Figure 5. Load Regulation
Vout , OUTPUT VOLTAGE CHANGE (%) 0.4 I out , OUTPUT CURRENT (A) 0.2 0 0.2 0.4 0.6 0.8 1.0 75 50 25 0 25 50 75 100 125 150 Vin = 15 V Vout = 10 V IL = 1.5 A IL = 0.5 A 7 TJ = 55°C 5 TJ = 25°C TJ = 150°C
Figure 6. Current Limit
3
1 0 0 10 20 30 40
TJ, JUNCTION TEMPERATURE (°C)
VinVout, INPUT VOLTAGE DIFFERENTIAL (Vdc)
Figure 7. Adjustment Pin Current
3.0 IAdj, ADJUSTMENT PIN CURRENT ( µA) 70 65 60 55 50 45 40 35 75 50 25 0 25 50 75 100 125 150 V in Vout , INPUTOUTPUT VOLTAGE DIFFERENTIAL (Vdc)
Figure 8. Dropout Voltage
V0 = 100 mV IL = 3.0 A IL = 2.0 A 2.0 IL = 500 mA 1.5 IL = 20 mA 50 25 0 25 50 75 100 TJ, JUNCTION TEMPERATURE (°C) IL = 200 mA 125 150
2.5
1.0 75
TJ, JUNCTION TEMPERATURE (°C)
Figure 9. Temperature Stability
1.260 Vref, REFERENCE VOLTAGE (V) IB , QUIESCENT CURRENT (mA) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 1.220 75 50 25 0 25 50 75 100 125 150 0 0
Figure 10. Minimum Operating Current
TJ = 55°C TJ = 25°C TJ = 150°C
1.250
1.240
1.230
10
20
30
40
TJ, JUNCTION TEMPERATURE (°C)
VinVout, INPUTOUTPUT VOLTAGE DIFFERENTIAL (Vdc)
MOTOROLA ANALOG IC DEVICE DATA
5
Others parts begin by 06
06-1
|
|
|
