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Part: 06F9212
Category:
Power Management
-> Regulators
-> Voltage Regulators
Description: Ic-sm Adj. Voltage Regulator
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Order this document by LM2931/D
Low Dropout Voltage Regulators
The LM2931 series consists of positive fixed and adjustable output voltage regulators that are specifically designed to maintain proper regulation with an extremely low inputtooutput voltage differential. These devices are capable of supplying output currents in excess of 100 mA and feature a low bias current of 0.4 mA at 10 mA output. Designed primarily to survive in the harsh automotive environment, these devices will protect all external load circuitry from input fault conditions caused by reverse battery connection, two battery jump starts, and excessive line transients during load dump. This series also includes internal current limiting, thermal shutdown, and additionally, is able to withstand temporary powerup with mirrorimage insertion. Due to the low dropout voltage and bias current specifications, the LM2931 series is ideally suited for battery powered industrial and consumer equipment where an extension of useful battery life is desirable. The `C' suffix adjustable output regulators feature an output inhibit pin which is extremely useful in microprocessorbased systems. · InputtoOutput Voltage Differential of < 0.6 V @ 100 mA
LM2931 Series
LOW DROPOUT VOLTAGE REGULATORS
FIXED OUTPUT VOLTAGE
Z SUFFIX PLASTIC PACKAGE CASE 29
1 2 3
Pin 1. Output 2. Ground 3. Input
T SUFFIX PLASTIC PACKAGE CASE 221A Heatsink surface connected to Pin 2. Pin 1. Input 2. Ground 3. Output
3
· · · · · · · · · ·
Output Current in Excess of 100 mA Low Bias Current 60 V Load Dump Protection 50 V Reverse Transient Protection Internal Current Limiting with Thermal Shutdown Temporary MirrorImage Protection Ideally Suited for Battery Powered Equipment Economical 5Lead TO220 Package with Two Optional Leadforms Available in Surface Mount SOP8, D2PAK and DPAK Packages High Accuracy (±2%) Reference (LM2931AC) Available
1
2
1 3 1 2 3
DT SUFFIX PLASTIC PACKAGE CASE 369A (DPAK) D2T SUFFIX PLASTIC PACKAGE CASE 936 (D2PAK)
DT1 SUFFIX PLASTIC PACKAGE CASE 369 (DPAK)
1
2 3
Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2. (See Following Page for Ordering Information.)
FIXED N.C. Gnd Input 8 1 5 4 N.C. Gnd Output
8 1
ADJUSTABLE OUTPUT VOLTAGE Pin 1. Adjust 2. Output Inhibit 3. Ground 4. Input 5. Output
1 5
TH SUFFIX PLASTIC PACKAGE CASE 314A
(Top View)
ADJUSTABLE Output Inhibit Gnd Input 8 1 5 4
D SUFFIX PLASTIC PACKAGE CASE 751 (SOP8) Adjust Gnd Output
TV SUFFIX PLASTIC PACKAGE CASE 314B T SUFFIX PLASTC PACKAGE CASE 314D
1 1 5 5
D2T SUFFIX PLASTIC PACKAGE CASE 936A (D2PAK) Heatsink surface (shown as terminal 6 in case outline drawing) is connected to Pin 3.
Rev 4
1 5
(Top View)
Heatsink surface connected to Pin 3.
© Motorola, Inc. 1997
MOTOROLA ANALOG IC DEVICE DATA
1
LM2931 Series
ORDERING INFORMATION
Output Device LM2931AD5.0 LM2931ADT5.0 LM2931ADT15.0 LM2931AD2T5.0 LM2931AT5.0 LM2931AZ5.0 LM2931D5.0 LM2931D2T5.0 LM2931DT5.0 LM2931DT15.0 LM2931T5.0 LM2931Z5.0 LM2931CD LM2931CD2T LM2931CT LM2931CTH LM2931CTV LM2931ACD LM2931ACD2T LM2931ACT LM2931ACTH LM2931ACTV Adjustable ±2.0% Adjustable ±5.0% 5.0 V ±3.8% 8 % Voltage Tolerance Case 751 369A 369 936 221A 29 751 936 369A 369 221A 29 751 936A 314D 314A 314B 751 936A 314D 314A 314B Package SOP8 Surface Mount Surface Mount DPAK DPAK Surface Mount D2PAK TO220 Type TO92 Type SOP8 Surface Mount Surface Mount D2PAK Surface Mount DPAK DPAK TO220 Type TO92 Type SOP8 Surface Mount Surface Mount D2PAK 5Pin TO220 Type 5Pin Horizontal Leadform 5Pin Vertical Leadform SOP8 Surface Mount Surface Mount D2PAK 5Pin TO220 Type 5Pin Horizontal Leadform 5Pin Vertical Leadform
Representative Schematic Diagram
Input 6.0
6.0 k 350 500 Output 30 k 30 k * 3.94 k Adjust 3.0 k EPI Bias 30 k
30 k 6.8 V Output Inhibit 50 k 48 k 180 k 184 k 5.8 V
92.8 k * 11.5 k Ground *Deleted on Adjustable Regulators This device contains 26 active transistors. 35 k 10 k
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MOTOROLA ANALOG IC DEVICE DATA
LM2931 Series
MAXIMUM RATINGS
Rating Input Voltage Continuous Transient Input Voltage ( 100 ms) Transient Reverse Polarity Input Voltage 1.0% Duty Cycle, 100 ms Power Dissipation Case 29 (TO92 Type) TA = 25°C Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 221A, 314A, 314B and 314D (TO220 Type) TA = 25°C Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 369 and 369A (DPAK) [Note 1] TA = 25°C Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 751 (SOP8) [Note 2] TA = 25°C Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 936 and 936A (D2PAK) [Note 3] TA = 25°C Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Tested Operating Junction Temperature Range Storage Temperature Range Symbol VI VI() VI() Value 40 60 50 Unit Vdc Vpk Vpk
PD RJA RJC PD RJA RJC PD RJA RJC PD RJA RJC PD RJA RJC TJ Tstg
Internally Limited 178 83 Internally Limited 65 5.0 Internally Limited 92 6.0 Internally Limited 160 25 Internally Limited 70 5.0 40 to +125 65 to +150
W °C/W °C/W W °C/W °C/W W °C/W °C/W W °C/W °C/W W °C/W °C/W °C °C
NOTES: 1. DPAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 24 for board mounted Thermal Resistance. 2. SOP8 JunctiontoAmbient Thermal Resistance is for minimum recommended pad size. Refer to Figure 23 for Thermal Resistance variation versus pad size. 3. D2PAK JunctiontoAmbient Thermal Resistance is for vertical mounting. Refer to Figure 25 for board mounted Thermal Resistance. 4. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 10 mA, CO = 100 µF, CO(ESR) = 0.3 , TJ = 25°C [Note 1].)
LM29315.0 Characteristic FIXED OUTPUT Output Voltage Vin = 14 V, IO = 10 mA, TJ = 25°C Vin = 6.0 V to 26 V, IO 100 mA, TJ = 40° to +125°C Line Regulation Vin = 9.0 V to 16 V Vin = 6.0 V to 26 V Load Regulation (IO = 5.0 mA to 100 mA) Output Impedance IO = 10 mA, IO = 1.0 mA, f = 100 Hz to 10 kHz Bias Current Vin = 14 V, IO = 100 mA, TJ = 25°C Vin = 6.0 V to 26 V, IO = 10 mA, TJ = 40° to +125°C Output Noise Voltage (f = 10 Hz to 100 kHz) Long Term Stability VO 4.75 4.50 Regline Regload ZO IB Vn S 5.8 0.4 700 20 30 1.0 5.8 0.4 700 20 30 1.0 µVrms mV/kHR 200 200 mA 2.0 4.0 14 10 30 50 2.0 4.0 14 10 30 50 mV m 5.0 5.25 5.50 4.81 4.75 5.0 5.19 5.25 mV V Symbol Min Typ Max Min LM2931A5.0 Typ Max Unit
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
MOTOROLA ANALOG IC DEVICE DATA
3
LM2931 Series
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 10 mA, CO = 100 µF, CO(ESR) = 0.3 , TJ = 25°C [Note 1].)
LM29315.0 Characteristic FIXED OUTPUT Ripple Rejection (f = 120 Hz) Dropout Voltage IO = 10 mA IO = 100 mA OverVoltage Shutdown Threshold Output Voltage with Reverse Polarity Input (Vin = 15 V) RR VIVO Vth(OV) VO 26 0.3 0.015 0.16 29.5 0 0.2 0.6 40 26 0.3 0.015 0.16 29.5 0 0.2 0.6 40 V V 60 90 60 90 dB V Symbol Min Typ Max Min LM2931A5.0 Typ Max Unit
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 10 mA, CO = 100 µF, CO(ESR) = 0.3 , TJ = 25°C [Note 1].)
LM2931C Characteristic ADJUSTABLE OUTPUT Reference Voltage (Note 2, Figure 18) IO = 10 mA, TJ = 25°C IO 100 mA, TJ = 40 to +125°C Output Voltage Range Line Regulation (Vin = VO + 0.6 V to 26 V) Load Regulation (IO = 5.0 mA to 100 mA) Output Impedance IO = 10 mA, IO = 1.0 mA, f = 10 Hz to 10 kHz Bias Current IO = 100 mA IO = 10 mA Output Inhibited (Vth(OI) = 2.5 V) Adjustment Pin Current Output Noise Voltage (f = 10 Hz to 100 kHz) LongTerm Stability Ripple Rejection (f = 120 Hz) Dropout Voltage IO = 10 mA IO = 100 mA OverVoltage Shutdown Threshold Output Voltage with Reverse Polarity Input (Vin = 15 V) Output Inhibit Threshold Voltages Output "On": TJ = 25°C TJ = 40° to +125°C Output "Off": TJ = 25°C TJ = 40° to +125°C Output Inhibit Threshold Current (Vth(OI) = 2.5 V) Vref 1.14 1.08 VOrange Regline Regload ZO IB IAdj Vn S RR VIVO Vth(OV) VO Vth(OI) 2.50 3.25 Ith(OI) 2.15 2.26 30 1.90 1.20 50 2.50 3.25 2.15 2.26 30 1.90 1.20 50 µA 26 0.3 0.015 0.16 29.5 0 0.2 0.6 40 26 0.3 0.015 0.16 29.5 0 0.2 0.6 40 V V V 0.10 6.0 0.4 0.2 0.2 140 0.4 0.003 1.0 1.0 0.10 6.0 0.4 0.2 0.2 140 0.4 0.003 1.0 1.0 µA µVrms/V %/kHR %/V V 40 40 mA 3.0 to 24 1.20 2.7 to 29.5 0.2 0.3 1.26 1.32 1.5 1.0 1.17 1.15 3.0 to 24 1.20 2.7 to 29.5 0.2 0.3 1.23 1.25 1.5 1.0 V mV/V %/V m/V V Symbol Min Typ Max Min LM2931AC Typ Typ Unit
NOTES: 1. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 2. The reference voltage on the adjustable device is measured from the output to the adjust pin across R1.
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MOTOROLA ANALOG IC DEVICE DATA
LM2931 Series
Figure 1. Dropout Voltage versus Output Current
200 Vin VO , DROPOUT VOLTAGE (mV) Vin VO , DROPOUT VOLTAGE (mV) 160 120 80 40 0 Vin = 14 V Vout = 100 mV TJ = 25°C 300 Vin = 14 V Vout = 100 mV 200
Figure 2. Dropout Voltage versus Junction Temperature
IO = 100 mA
100 IO = 50 mA IO = 10 mA 0 0 25 50 75 100 125
0
20
40 60 IO, OUTPUT CURRENT (mA)
80
100
TJ, JUNCTION TEMPERATURE (°C)
Figure 3. Peak Output Current versus Input Voltage
350 I O , OUTPUT CURRENT (mA) 6.0 5.0 4.0 3.0 2.0 1.0 0
Figure 4. Output Voltage versus Input Voltage
250 TJ = 85°C
TJ = 25°C
150 Dashed lines below Vin = 5.0 V are for Adjustable output devices only. 50 0 5.0 10 15 20 Vin, INPUT VOLTAGE (V) 25 30
VO , OUTPUT VOLTAGE (V)
TJ = 40°C
Vout = 5.0 V TA = 25°C
RL = 50
IO = 100 mA
0
1.0
2.0 3.0 4.0 Vin, INPUT VOLTAGE (V)
5.0
6.0
Figure 5. Output Voltage versus Input Voltage
Vin , INPUT VOLTAGE (10 V/DIV) 6.0 VO , OUTPUT VOLTAGE (V) 5.0 4.0 3.0 2.0 1.0 0 20 Vout = 5.0 V RL = 500 TA = 25°C 10 0 10 20 30 Vin, INPUT VOLTAGE (V) 40 50 60 VCC = 15 V VFB1 = 5.05 V
Figure 6. Load Dump Characteristics
Vout = 5.0 V RL = 50 CO = 100 µF = 150 ms TA = 25°C
VO, OUTPUT VOLTAGE (5.0 V/DIV)
0
0
t, TIME (50 ms/DIV)
MOTOROLA ANALOG IC DEVICE DATA
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