LOW DROPOUT VOLTAGE REGULATORS

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 input–to–output 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 power–up with mirror–image 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 microprocessor–based systems. • Input–to–Output 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 Mirror–Image Protection Ideally Suited for Battery Powered Equipment Economical 5–Lead TO–220 Package with Two Optional Leadforms Available in Surface Mount SOP–8, 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) DT–1 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 (SOP–8) 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 D i LM2931AD–5.0 LM2931ADT–5.0 LM2931ADT–1–5.0 LM2931AD2T–5.0 LM2931AT–5.0 LM2931AZ–5.0 LM2931D–5.0 LM2931D2T–5.0 LM2931DT–5.0 LM2931DT–1–5.0 LM2931T–5.0 LM2931Z–5.0 LM2931CD LM2931CD2T LM2931CT LM2931CTH LM2931CTV LM2931ACD LM2931ACD2T LM2931ACT LM2931ACTH LM2931ACTV Adjustable Adj bl ±2.0% 2 0% Adjustable Adj j bl ±5.0% 5 0% 5.0 50V ±38 3 8% % ±3.8% Voltage Tolerance Case C 751 369A 369 936 221A 29 751 936 369A 369 221A 29 751 936A 314D 314A 314B 751 936A 314D 314A 314B Package P k SOP–8 Surface Mount Surface Mount DPAK DPAK Surface Mount D2PAK TO–220 Type TO–92 Type SOP–8 Surface Mount Surface Mount D2PAK Surface Mount DPAK DPAK TO–220 Type TO–92 Type SOP–8 Surface Mount Surface Mount D2PAK 5–Pin TO–220 Type 5–Pin Horizontal Leadform 5–Pin Vertical Leadform SOP–8 Surface Mount Surface Mount D2PAK 5–Pin TO–220 Type 5–Pin Horizontal Leadform 5–Pin 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 2 MOTOROLA ANALOG IC DEVICE DATA LM2931 Series MAXIMUM RATINGS Rating Input Voltage Continuous Transient Input Voltage (τ ≤ 100 ms) Transient Reverse Polarity Input Voltage 1.0% Duty Cycle, τ ≤ 100 ms Power Dissipation Case 29 (TO–92 Type) TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 221A, 314A, 314B and 314D (TO–220 Type) TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 369 and 369A (DPAK) [Note 1] TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 751 (SOP–8) [Note 2] TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Case 936 and 936A (D2PAK) [Note 3] TA = 25°C Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Tested Operating Junction Temperature Range Storage Temperature Range Symbol VI VI(τ) –VI(τ) Value 40 60 – 50– Unit Vdc Vpk Vpk PD RθJA RθJC PD RθJA RθJC PD RθJA RθJC PD RθJA RθJC PD RθJA RθJC 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 Junction–to–Ambient Thermal Resistance is for vertical mounting. Refer to Figure 24 for board mounted Thermal Resistance. 2. SOP–8 Junction–to–Ambient Thermal Resistance is for minimum recommended pad size. Refer to Figure 23 for Thermal Resistance variation versus pad size. 3. D2PAK Junction–to–Ambient 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 Ω, TJ = 25°C [Note 1].) LM2931–5.0 Characteristic Ch i i 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 mΩ 5.0 – 5.25 5.50 4.81 4.75 5.0 – 5.19 5.25 mV V Symbol S b l Min Typ Max Min LM2931A–5.0 Typ Max Unit U i 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 Ω, TJ = 25°C [Note 1].) LM2931–5.0 Ch i i Characteristic FIXED OUTPUT Ripple Rejection (f = 120 Hz) Dropout Voltage IO = 10 mA IO = 100 mA Over–Voltage Shutdown Threshold Output Voltage with Reverse Polarity Input (Vin = –15 V) RR VI–VO – – 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 S b l Symbol Min Typ Max Min LM2931A–5.0 Typ Max U i Unit ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 10 mA, CO = 100 µF, CO(ESR) = 0.3 Ω, 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) Long–Term Stability Ripple Rejection (f = 120 Hz) Dropout Voltage IO = 10 mA IO = 100 mA Over–Voltage 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 VI–VO – – 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 mΩ/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. 4 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 I