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UNISONIC TECHNOLOGIES CO., LTD LP2950/2951
100 mA LOW-DROPOUT VOLTAGE REGULATOR
1 TO-92
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
The UTC LP2950/2951 are monolithic integrated voltage regulators with low dropout voltage, and low quiescent current. It includes many features that suitable for different applications.
SOP-8
FEATURES
* Fixed output versions, 2.5V, 3V, 3.3V, 3.6V and 5V, are available. * High accuracy output voltage. * Extremely low quiescent current and dropout voltage. * Extremely tight load and line regulation. * Current and thermal limiting. * Very low temperature coefficient. * Logic controlled shutdown and err flog available for 8 pin package. * Output voltage programmable for LP2951.
DIP-8
*Pb-free plating product number: LP2950L-XX/LP2951L
ORDERING INFORMATION
www..com Ordering Number Package Normal Lead Free Plating LP2950-xx-D08-T LP2950L-xx-D08-T DIP-8 LP2950-xx-S08-T LP2950L-xx-S08-T SOP-8 LP2950-xx-S08-R LP2950L-xx-S08-R SOP-8 LP2950-xx-T92-B LP2950L-xx-T92-B TO-92 LP2950-xx-T92-K LP2950L-xx-T92-K TO-92 LP2951-D08-T LP2951L-D08-T DIP-8 LP2951-S08-T LP2951L-S08-T SOP-8 LP2951-S08-R LP2951L-S08-R SOP-8 Note: xx: Output Voltage Code (For LP2950 only)
Packing Tube Tube Tape Reel Tape Box Bulk Tube Tube Tape Reel
LP2950L-xx-S08-R (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating (1) B: Tape Box, K: Bulk, R: Tape Reel, T: Tube (2) D08: DIP-8, S08: SOP-8, T92: TO-92 (3) xx: refer to Output Voltage Code (4) L: Lead Free Plating, Blank: Pb/Sn
OUTPUT VOLTAGE CODE(For LP2950)
OUTPUT VOLTAGE 2.5V 3.0V 3.3V 3.6V 5.0V CODE 25 30 33 36 50
www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd
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PIN CONFIGURATIONS
UTC LP2950
OUTPUT
1 2 3
LINEAR INTEGRATED CIRCUIT
1
8
INPUT
OUTPUT
1
8
INPUT
SENSE
2
7
FEEDBACK
NC
2
7
NC
OUTPUT GND
INPUT
SHUTDOWN
3
4
UTC LP2951
6 5V TAP SHUTDOWN
3
4
UTC LP2950
6 NC
GND
5
ERROR
GND
5
ERROR
TO-92 Plastic Package Bottom View
SOP-8 OR DIP-8 PACKAGE FOR UTC LP2951
SOP-8 OR DIP-8 PACKAGE FOR UTC LP2950
BLOCK DIAGRAM
UNREGULATED DC
FEEDBACK
7
INPUT
8
OUTPUT
1
5V 150mA MAX.
SENSE 182k FROM CMOS OR TTL SHUT DOWN 3 ERROR AMPLIFIER 60mV 60k ERROR 1.23 REF ERROR DETECTION COMPARATOR 5V TAP
2
6 1.5 5 F
330K
TO CMOS OR TTL GND 4
FOR UTC LP2951
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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ABSOLUTE MAXIMUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.3 ~ +30 V Feedback Voltage VFB -1.5 ~ +30 V Shutdown Voltage VSHDN -0.3 ~ +30 V Operation Junction Temperature TJ -40 ~ +125 C Storage Temperature TSTG -65 ~ +150 C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (TJ=25C, VIN=6V, IL=100A, CL=1F, unless otherwise specified.) For All Version:
PARAMETER Output Voltage Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage Ground Current Dropout Ground Current Current Limit Output Noise (10Hz ~ 100KHz) (Bypass=0.01F pins 7 to 1 (LP2951)) SYMBOL VOUT VOUT TEST CONDITION MIN TJ=25C (Note 1) VOUTx0.98 -25C TJ +85C(Note 1) VOUTx0.98 100A IL 100mA, TJ TJ(max) VOUTx0.98 20 0.03 0.04 50 380 75 8 110 160 0.1 0.1 80 450 120 12 170 200 TYP MAX VOUT VOUTx1.02 VOUT VOUTx1.02 VOUT VOUTx1.02 100 0.2 0.2 150 600 140 14 200 220 430 160 100 MAX 1.25 1.27 40 UNIT V V V ppm/C % % mV A mA A mA V
TcVo
VOUT 6V VIN 30V VOUT 100A IL 100 mA IL=100A VD IL=100mA (Note 2) IL=100A IG IL=100mA VIN=4.5V,IL=100A ILIMIT VOUT=0 CL=1F eN CL=200F CL=3.3F
For UTC LP2951 8-Pin Version Only
PARAMETER SYMBOL TEST CONDITION VREF Reference Voltage VREF Over temperature(Note 4) Reference Voltage Feedback pin Bias Current IFB Reference Voltage Temperature VREF(TC) Coefficient Feedback Bias Current IFB(TC) Temperature Coefficient Error Comparator Output Leakage Current IO(LEAK) VOH=30V Output Low Voltage VOL VIN=4.5V, IOL=400A VTHU (Note 3) Upper Threshold Voltage VTHL (Note 3) Lower VHYS (Note 3) Hysteresis MIN 1.22 1.19 TYP 1.235 20 50 0.1 UNIT V V nA ppm/C nA/C A mV %VO %VO mV
1 250 3.2 7.6 15
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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ELECTRICAL CHARACTERISTICS(Cont.) For UTC LP2951 8-Pin Version Only
PARAMETER Shutdown Input Input Logic Voltage Low High SYMBOL VIL VIH TEST CONDITION
LINEAR INTEGRATED CIRCUIT
MIN
TYP
MAX
UNIT
Regulator ON 1.3 0.70 V Regulator OFF 2.0 VSHDN=2.4V 30 50 A Shutdown Pin Input Current ISHDN VSHDN=30V 450 600 A VSHDN 2V, VIN 30V, VOUT=0 Regulator Output Current IDFF 3 10 A Shutdown Feedback pin tied to 5V Tap. Note 1:Additional conditions for 8-pin versions are FB pin tied to 5VTAP, Output tied to Sense(VOUT=5V) and VSHDN0.8V. Note 2: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential. Note 3: Comparator thresholds are expressed in terms of percentage value of voltage output. Note 4: VREFVOUT(VIN-1V), 2.3VVIN30V, 100AIL100mA, TJTJ(MAX)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TYPICAL APPLICATION CIRCUIT 10 Ampere Low Dropout Regulator
CURRENT LIMIT SECTION
LINEAR INTEGRATED CIRCUIT
+VIN=Vout+0.5V
680
0.05
2N3906
470
UTC D65H0
4.7M
8 +VIN ERROR
5
10k
+VOUT 100m A
UTC LP2951
3 220 20k SD FB GND 4 7
R1 100F 1% R2 4.7F
Vout
1 47
0.033F
VOUT=1.23V*(1+R1/R2) For 5V output use internal resistors.Wire pin 6 to 7 and wire pin 2 to +VOUT
Fig.1
VIN
UTC UTC UTC UTC UTC
LP2950-2.5 LP2950-3.0 LP2950-3.3 LP2950-3.6 LP2950-5.0
VOUT
Fig.2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TYPICAL CHARACTERISTICS
Dropout Characteristics 6 5 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0
LINEAR INTEGRATED CIRCUIT
Input Current
R L= 50
Output Voltage (V)
4
3 2 1 0 0
RL=50
1
3 4 2 Input Voltage (V)
5
6
Input Current (mA)
RL=50k
01
2 3 4 5 6 7 8 9 10 11 12 Input Voltage (V)
Ground Pin Current 8 120 110
Ground Pin Current
Quiescent Current (mA)
100 90 80 70 60 50 -75 -50 -25 0 25 50 75 100 125 150 ) VIN =6V I L=100A
Quiescent Current (mA)
7 V IN = 6V mA IL =100
6
5
4 -75 -50 -25 0 25 50 75 ) 100125 150
Temperature (
Temperature (
Dropout Voltage 1.8 600 500 IL =100 mA
Shutdown Threshold Voltage
Shutdown Threshold Voltage (V)
100125 150
1.6
Dropout Voltage (mV)
400 300 200 IL =100A 100 50 0 -75 -50 -25 0 25 50 75 )
1.4 1.2
1.0
0.8 0.6 -75 -50 -25
Temperature (
0 25 50 75 100125 150 Temperature ( )
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TYPICAL CHARACTERISTICS(Cont.)
Short Circuit Current 500 170
LINEAR INTEGRATED CIRCUIT
Dropout Voltage
Short Circuit Current (mA)
160 150 140 130 120 110 100 -75 -50 -25 0 25 50 75 100 125 150 ) Temperature (
400
D rop ou t Voltag e(mV)
300
200
100
TJ=25
0 0.1 1 10 100 Output Current (mA)
UTC assum es no responsibility for equipm ent failures that result from using products at v alues that exceed, ev en m om entarily, rated v alues (such as m axim um ratings, operating condition ranges, or other param eters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or system s where m alfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The inform ation presented in this docum ent does not form part of any quotation or contract, is believ ed to be accurate and reliable and m ay be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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