AIC1642. One Cell Step-Up DC/DC Converter

Transcription

1 3-Pin One-Cell Step-Up DC/DC Converter FEATURES A Guaranteed Start-Up from less than 0.9 V. High Efficiency. ow Quiescent Current. ess Number of External Components needed. ow Ripple and ow Noise. Fixed Output Voltage: 2.0V, 2.2V, 2.7V, 2.8V, 3.0V, 3.1V, 3.3V, 3.7V, 4.5V and 5V. Space Saving Packages: SOT-89, TO-92 (3 pin) and SOT-23 (3 & 5 pin). APPICATIONS Pagers. Cameras. Wireless Microphones. Pocket Organizers. Battery Backup Suppliers. Portable Instruments. DESCRIPTION The AIC1642 is a high efficiency step-up DC/DC converter for applications using 1 to 4 NiMH battery cells. Only three external components are required to deliver a fixed output voltage of 2.0V, 2.2V, 2.7V, 2.8V, 3.0V, 3.1V, 3.3V, 3.7V, 4.5V or 5V. The AIC1642 starts up from less than 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode. The PFM control circuit operating in 100KHz (max.) switching rate results in smaller passive components. The space saving SOT-23, SOT- 89 and TO-92 packages make the AIC1642 an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones. TYPICA APPICATION CIRCUIT V IN H C1 22F SW AIC1642 D1 GS SS12 GND VOUT V OUT + C2 47F V IN ENABE 1 100H + C1 22F SW EN AIC1642 D1 GS SS12 GND VOUT + V OUT C2 47F One Cell Step-Up DC/DC Converter One Cell Step-Up DC/DC Converter with Enable Control Analog Integrations Corporation Si-Soft Research Center DS-1642G A1, 1 i-hsin 1 st Rd., Science Park, Hsinchu 300, Taiwan, R.O.C. TE: FAX:

2 ORDERING INFORMATION AIC1642-XXXXXX PIN CONFIGURATION PACKING TYPE TR: TAPE & REE TB: TUBE BG: BAG PACKAGE TYPE U: SOT-23 V: SOT-23-5 V:SOT X: SOT-89 Z: TO-92 C: COMMERCIA P: EAD FREE C OM MER CIA G: GREEN PACKAGE OUTPUT VOTAGE 20: 2.0V 22: 2.2V 27: 2.7V 28: 2.8V 30: 3.0V 31: 3.1V 33: 3.3V 37: 3.7V 45: 4.5V : 5.0V Example: AIC CXTR 2.7V Version, in SOT-89 Package & T ape & Reel Packing Type AIC PXTR 2.7V Version, in ead Free SOT-89 Package & Tape & Reel Packing SOT-89 TOP VIEW 1: GN D 2: VOUT 3: SW TO-92 TOP VIEW 1: GND 2: VOU T 3: SW SOT-23 TOP VIEW 1: GND 2: SW 3: VOUT SOT-23-5(GV) TOP VIEW 1: EN 2: VOUT 3: NC 4: GND 5: SW SOT-23-5(GV) TOP VIEW 1: SW 2: GND 3: OUT 4: NC 5: NC

3 ORDERING INFORMATION (Continuous) SOT-23-5 MARKING Part No. GV GV AIC GW20G GY20G AIC GW22G GY22G AIC GW27G GY27G AIC GW28G GY28G AIC GW30G GY30G AIC GW31G GY31G AIC GW33G GY33G AIC GW37G GY37G AIC GW45G GY45G AIC1642- GWG GYG SOT-23 MARKING Part No. CU PU GU AIC GM20 GM20P GM20G AIC GM22 GM22P GM22G AIC GM27 GM27P GM27G AIC GM28 GM28P GM28G AIC GM30 GM30P GM30G AIC GM31 GM31P GM31G AIC GM33 GM33P GM33G AIC GM37 GM37P GM37G AIC GM45 GM45P GM45G AIC1642- GM GMP GMG SOT-89 MARKING Part No. CX PX GX AIC AM20 AM20P AM20G AIC AM22 AM22P AM22G AIC AM27 AM27P AM27G AIC AM28 AM28P AM28G AIC AM30 AM30P AM30G AIC AM31 AM31P AM31G AIC AM33 AM33P AM33G AIC AM37 AM37P AM37G AIC AM45 AM45P AM45G AIC1642- AM AMP AMG 3

4 ABSOUATE MAXIMUM RATINGS Supply Voltage (VOUT pin) 6V SW pin Voltage 6V SW pin Switch Current A EN pin Voltage 6V Operating Temperature Range -C to 85C Maximum Junction Temperature 125C Storage Temperature Range -65C to 1 C ead Temperature (Soldering 10 Sec.) 2C Thermal Resistance Junction to Case TO C/W SOT C/W SOT C/W SOT-89 45C/W Thermal Resistance Junction to Ambient TO-92 1C/W (Assume no ambient airflow, no heatsink) SOT-23 2C/W SOT C/W SOT-89 1C/W Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. TEST CIRCUIT V IN V OUT I IN 1 100H D1 SS12 IS AIC1642 AIC C2 + C1 22F SW VOUT 47F GND VS VOUT GND SW VSW Fig. 1 Test Circuit 1 Fig. 2 Test Circuit 2 AIC1642 V S VOUT SW 100 F OSC GND Fig. 3 Test Circuit 3 4

5 EECTRICA CHARACTERISTICS (T A =25C, I OUT =10mA, Unless otherwise specified) (Note1) PARAMETER Output Voltage TEST CONDITIONS AIC V IN =1.8V AIC V IN =1.8V AIC V IN =1.8V AIC V IN =1.8V AIC V IN =1.8V AIC V IN =1.8V AIC V IN =2.0V AIC V IN =2.0V AIC V IN =3.0V AIC1642- V IN =3.0V TEST CKT SYMBO MIN. TYP. MAX. UNIT 1 V OUT V Start-Up Voltage I OUT =1mA, V IN :02V 1 V START 0.9 V Min. Hold-on Voltage I OUT =1mA, V IN :20V 1 V HOD 0.7 V No-oad Input Current I OUT =0mA 1 I IN 15 A SW eakage Current V SW =6V, V S =V OUT + 0.5V A AIC AIC AIC AIC AIC Supply Current AIC AIC I S1 55 A AIC AIC AIC1642- V S =V OUT x Measurement of the IC input current (VOUT pin) 5

6 EECTRICA CHARACTERISTICS (Continued) PARAMETER Supply Current SW Switch-On Resistance Oscillator Duty Cycle Max. Oscillator Freq. TEST CONDITIONS AIC AIC AIC AIC AIC AIC AIC AIC AIC AIC1642- V S =V OUT + 0.5V Measurement of the IC input current (VOUT pin) AIC AIC AIC AIC AIC AIC AIC AIC AIC AIC1642- V S =V OUT x 0.95, V SW =V V S =V OUT x 0.95 Measurement of the SW pin waveform V S =V OUT x 0.95 Measurement of the SW pin waveform TEST CKT 2 I S2 2 R ON SYMBO MIN. TYP. MAX. UNIT DUTY % A 3 F OSC KHz Efficiency 1 85 % EN Pin Current V EN = V OUT I EN A EN Input Threshold Chip Enable V ENH 1.6 Chip Disable V EN V Note 1: Specifications are production tested at T A =25C. Specifications over the -C to 85C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). 6

7 TYPICA PERFORMANCE CHARACTERISTICS Test circuit refer to typical application circuit Capacitor (C2) : 47 F (Tantalum Type) Diode (D1) : 1N5819 Schottky Type V IN=1.8V V IN=2.0V V IN =1.2V V IN=0.9V Fig. 4 AIC oad Regulation (=100H CD54) Efficiency (%) V IN =1.8V V IN=2.0V V IN=0.9V V IN=1.2V Output current (ma) Fig. 5 AIC Efficiency (=100H CD54) V IN=1.2V V IN=0.9V V IN=1.5V V IN=1.8V V IN=2.0V Efficiency (%) V IN =0.9V V IN =1.2V V IN =1.8V V IN =2.0V Fig. 6 AIC oad Regulation (=47H CD54) Output current (ma) Fig. 7 AIC Efficiency (=47H CD54) 2 Input Voltage (V) Start up Hold on Fig. 8 AIC Start-Up & Hold-ON Voltage (=47H CD54) Input Voltage (V) Start up Hold on Fig. 9 AIC Start-Up & Hold-ON Voltage (=100H CD54) 7

8 TYPICA PERFORMANCE CHARACTERISTICS (Continued) Switching Frequency (khz) Temperature (C) Fig. 10 AIC Output Voltage vs. Temperature Temperature (C) Fig. 11 AIC Switching Frequency vs. Temperature Maximum Duty Cycle (%) Temperature (C) Fig. 12 AIC Maximum Duty Cycle vs. Temperature SW Turn ON Resistance () Temperature (C) Fig. 13 AIC SW Turn ON Resistance vs. Temperature Supply Current (A) Temperature (C) Fig. 14 AIC Supply Current vs. Temperature Output voltage VOUT(V) V IN =0.9V V IN =1.2V V IN =2.0V V IN =1.8V Fig. 15 AIC oad Regulation (=100H, CD54) 8

9 TYPICA PERFORMANCE CHARACTERISTICS (Continued) Efficiency (%) V IN =1.8V V IN = V IN=1.2V V IN=1.5V V IN =1.8V V IN=2.0V 55 V IN =0.9V V IN =1.2V 2.3 V IN=0.9V Fig. 16 AIC Efficiency (=100H, CD54) Fig. 17 AIC oad Regulation (=47H CD54) Start up Efficiency (%) V IN =1.8V V IN=2.0V Input Voltage (V) Hold on 55 V IN=0.9V V IN=1.2V Fig. 18 AIC Efficiency (=47H CD54) Fig. 19 AIC Start-up & Hold-on Voltage (=100H CD54) Input Voltage (V) Start up Hold on Fig. 20 AIC Start-up & Hold-on Voltage (=47H CD54) No oad 2.90 Temperature (C) Fig. 21 AIC Output Voltage vs. Temperature 9

10 TYPICA PERFORMANCE CHARACTERISTICS (Continued) 1 Switching Frequency (khz) Maximum Duty Cycle (%) Temperature (C) Fig. 22 AIC Switching Frequency vs. Temperature Temperature (C) Fig. 23 AIC Maximum Duty Cycle vs. Temperature SW Turn ON Resistance () Temperature (C) Fig. 24 AIC SW Turn ON Resistance vs. Temperature Supply Current (A) Temperature (C) Fig. 25 AIC Supply Current vs. Temperature V IN=1.2V V IN=0.9V V IN=1.5V V IN=1.8V V IN=2.0V Fig. 26 AIC oad Regulation (=100H, CD54) Efficiency (%) V IN=0.9V V IN=1.2V V IN=1.5V V IN=1.8V V IN=2.0V Fig. 27 AIC Efficiency (=100H, CD54) 10

11 TYPICA PERFORMANCE CHARACTERISTICS (Continued) V IN =0.9V V IN =1.2V V IN =1.8V V IN =2.0V Efficiency (%) V IN =0.9V V IN =1.2V V IN =1.8V V IN =2.0V Fig. 28 AIC oad Regulation (=47H, CD54) Fig. 29 AIC Efficiency (=47H,CD54) Input Voltage (V) Start up Hold on Fig. 30 AIC Start-up & Hold-on Voltage (=100H CD54) Output Voltage Vout (V) No oad 3.00 Temperature (C) Fig. 31 AIC Output Voltage vs. Temperature 1 Switching Frequency (khz) Maximum Duty Cycle (%) Temperature (C) Fig. 32 AIC Switching Frequency vs. Temperature Temperature (C) Fig. 33 AIC Maximum Duty Cycle vs. Temperature 11

12 TYPICA PERFORMANCE CHARACTERISTICS (Continued) SW Turn ON Resistance () Temperature (C) Fig. 34 AIC SW Turn ON Resistance vs. Temperature Supply Current IDD1 (A) Temperature (C) Fig. 35 AIC Supply Current vs. Temperature V IN=1.2V V IN =0.9V V IN=1.8V V IN =2.0V Fig. 36 AIC oad Regulation (=100H) V IN=2.5V Efficiency (%) V IN=0.9V V IN=1.2V V IN=1.8V V IN=2.0V Fig. 37 AIC Efficiency (100H) V IN =2.5V V IN=0.9V V IN=1.2V V IN=1.8V V IN=2.0V Fig. 38 AIC oad Regulation (=47H) V IN=2.5V Efficiency (%) V IN=0.9V V IN=1.2V V IN=1.8V V IN=2.0V Fig. 39 AIC Efficiency (47H) V IN=2.5V 12

13 TYPICA PERFORMANCE CHARACTERISTICS (Continued) Input Voltage (V) Start up Hold on Fig. AIC Start-up & Hold-on Voltage (=100H) No oad 3. Temperature (C) Fig. 41 AIC Output Voltage vs. Temperature 1 Switching Frequency (KHz) Maximum Duty Cycle (%) Temperature (C) Fig. 42 AIC Switching Frequency vs. Temperature Temperature (C) Fig. 43 AIC Maximum Duty Cycle vs Temperature V IN=0.9V V IN=1.2V V IN=2.0V V IN =3.0V Efficiency (%) V IN=0.9V V IN=1.2V V IN=1.5V V IN=2.0V V IN=3.0V Fig. 44 AIC oad Regulation (=100H) Fig. 45 AIC Efficiency (=100H) 13

14 TYPICA PERFORMANCE CHARACTERISTICS (Continued) V IN=0.9V V IN=1.2V V IN=2.0V V IN =3.0V Input Voltage (V) 1.2 Start up Hold on Fig. 46 AIC oad Regulation (=100H) Fig. 47 AIC Start-up & Hold-On Voltage (=100H) No oad Supply Current (A) Temperature (C) Fig. 48 AIC Output Voltage vs. Temperature 10 Temperature (C) Fig. 49 AIC Supply Current vs. Temperature 1 Switching Frequency (khz) Maximum Duty Cycle (%) Temperature (C) Fig. AIC Switching Frequency vs. Temperature Temperature (C) Fig. 51 AIC Maximum Duty Cycle vs. Temperature 14

15 TYPICA PERFORMANCE CHARACTERISTICS (Continued) SW Turn ON Resistance () Temperature (C) Fig. 52 AIC SW Turn ON Resistance vs. Temperature V IN =0.9V V IN =1.2V V IN =2.0V V IN =3.0V Fig. 53 AIC1642- oad Regulation ( =100H CD54) Efficiency (%) 30 V IN =2.0V V IN =0.9V V IN =1.2V V IN =3.0V V IN =2.0V V IN =1.2V V IN =0.9V V IN =3.0V Fig. 54 AIC1642- Efficiency (=100H CD54) Fig. 55 AIC1642- oad Regulation (=47H CD54) Efficiency (%) V IN =2.0V 55 V IN =0.9V V IN =1.2V V IN =3.0V Fig. 56 AIC1642- Efficiency (=47H CD54) Input Voltage (V) Start up Hold on Fig. 57 AIC1642- Start-up & Hold-on Voltage (=100H CD) 15

16 TYPICA PERFORMANCE CHARACTERISTICS (Continued) Output Voltage VOUT (V) No oad Switching Frequency (khz) Temperature (C) Fig. 58 AIC1642- Output Voltage vs. Temperature Temperature (C) Fig. 59 AIC1642- Switching Frequency vs. Temperature Maximum Duty Cycle (%) Temperature (C) Fig. AIC1642- Maximum Duty Cycle vs. Temperature SW Turn ON Resistance () Temperature (C) Fig. 61 AIC1642- SW Turn ON Resistance vs. Temperature Supply Current IDD1 (A) mA V OUT mv/div oad Step ma/div 10 Temperature (C) Fig. 62 AIC1642- Supply Current vs. Temperature Fig. 63 oad Transient Response (1=100H, C2=47F, V IN =2V) 16

17 TYPICA PERFORMANCE CHARACTERISTICS (Continued) V OUT 20mv/div V IN 0.5V/div Fig. 64 ine Transient Response ( 1=100H, C 2=47F) BOCK DIAGRAM VOUT 1.25V REF. SW 1M - + GND OSC, 100KHz EN PIN DESCRIPTIONS GND Ground. Must be low impedance; sorer directly to ground plane. VOUT IC supply pin. Connect VOUT to the regulator output. SW Internal drain of N-MOSFET switch. EN (5 Pin) Chip Enable. This pin is not allowed to float. 17

18 3-Pin One-Cell Step-Up DC/DC Converter APPICATION INFORMATION GENERA DESCRIPTION AIC1642 PFM (pulse frequency modulation) controller ICs combine a switch mode regulator, N-channel power MOSFET, precision voltage reference, and voltage detector in a single monolithic device. They offer extreme low quiescient current, high efficiency, and very low gate threshold voltage to ensure startup with low battery voltage (V typ.). Designed to maximize battery life in portable products, and minimize switching losses by only switching as needed service the load. PFM controllers transfer a discrete amount of energy per cycle and regulate the output voltage by modulating switching frequency with the constant turn-on time. Switching frequency depends on load, input voltage, and inductor value, and it can range up to 100KHz. The SW on-resistance is typically 1.9 to 2.2 to minimize switch losses. When the output voltage drops, the error comparator enables 100kHz oscillator that turns on the MOSFET around 7.5us and 2.5us off time. Turning on the MOSFET allows inductor current to ramp up, storing energy in a magnetic field. When MOSFET turns off that force inductor current through diode to the output capacitor and load. As the stored energy is depleted, the current ramp down until the diode turns off. At this point, inductor may ring due to residual energy and stray capacitance. The output capacitor stores charge when current flowing through the diode is high, and release it when current is low, thereby maintaining a steady voltage across the load. As the load increases, the output capacitor discharges faster and the error comparator initiates cycles sooner, increasing the switching frequency. The maximum duty cycle ensure adequate time for energy transfer to output during the second half each cycle. Depending on circuit, PFM controller can operate in either discontinuous mode or continuous conduction mode. Continuous conduction mode means that the inductor current does not ramp to zero during each cycle. VIN I IN I D I OUT SW + V OUT EXT Isw Ico V EXT I IN I PK I SW I D I OUT T DIS V SW Charge Co. Discharge Co. t Discontinuous Conduction Mode Analog Integrations Corporation Si-Soft Research Center DS-1642G A1, 1 i-hsin 1 st Rd., Science Park, Hsinchu 300, Taiwan, R.O.C. TE: FAX:

19 V EXT I IN I SW I PK In the continuous mode, the switching frequency is f SW 1 T ON V (V OUT OUT x * [1 ( 2 V 1 V TON V OUT V V V V VIN VSW VD V VD V VD V OUT OUT D D IN SW where Vsw = switch drop and proportion to output current. ) SW IN SW )] I D V SW Continuous Conduction Mode Continuous Conduction Mode I OUT At the boundary between continuous and discontinuous mode, output current (IOB) is determined by I OB V V IN OUT * 1 V * 2 IN * T ON where Vd is the diode drop, x (R ON T RS) * ON * (1 x) R ON = Switch turn on resistance, R S = Inductor DC resistance T ON = Switch ON time In the discontinuous mode, the switching frequency (Fsw) is 2 * () * (VOUT VD VIN) * (IOUT) Fsw = (1 x) 2 2 VIN TON t Inductor Selection To operate as an efficient energy transfer element, the inductor must fulfill three requirements. First, the inductance must be low enough for the inductor to store adequate energy under the worst case condition of minimum input voltage and switch ON time. Second, the inductance must also be high enough so maximum current rating of AIC1642 and inductor are not exceed at the other worst case condition of maximum input voltage and ON time. astly, the inductor must have sufficiently low DC resistance so excessive power is not lost as heat in the windings. But unfortunately this is inversely related to physical size. Minimum and maximum input voltage, output voltage and output current must be established in advance and then inductor can be selected. In discontinuous mode operation, at the end of the switch ON time, peak current and energy in the inductor build according to I PK V VIN RON Rs * 1 exp( * TON) RON Rs IN * T ON * 1 x 2 VIN TON (simple loss equation), where x (R ON T RS) * ON 2 E = 1 Ipk 2 Power required from the inductor per cycle must be equal or greater than 19

20 1 P/fSW (VOUT VD VIN) * (IOUT) * ( ) fsw In order for the converter to regulate the output. When loading is over IOB, PFM controller operates in continuous mode. Inductor peak current can be derived from VOUT VD VSW x IPK *I VINVSW 2 Valley current (Iv) is VOUT VD V IV VINVSW SW x *I 2 OUT OUT VINV 2 V IN SW *T VSW *T 2 ON ON x * 1 2 x * 1 2 A poor choice for an output capacitor can result in poor efficiency and high output ripple. Ordinary aluminum electrolytic, while inexpensive may have unacceptably poor ESR and ES. There are low ESR aluminum capacitors for switch mode DC-DC converters which work much well than general unit. Tantalum capacitors provide still better performance at more expensive. OS-CON capacitors have extremely low ESR in a small size. If capacitance is reduced, output ripple will increase. Most of the input supply is supplied by the input bypass capacitor, the capacitor voltage rating should be at least 1.25 times greater than a maximum input voltage. Diode Selection Speed, forward drop, and leakage current are the three main considerations in selecting a rectifier diode. Best performance is obtained with Schottky rectifier diode such 1N5819. Motorola makes MBR0530 in surface mount. For lower Table 1 Indicates resistance and height for each coil. Power Inductor Type Inductance ( H ) Resistance ( ) Rated Current (A) Height (mm) DS Coilcraft SMT Type ( DO Sumida SMT Type CD Hold SMT Type PM Hold SMT Type PM Capacitor Selection output power a 1N4148 can be used although efficiency and start-up voltage will suffer substantially. Component Power Dissipation Operating in discontinuous mode, power loss in the winding resistance of inductor can be approximate equal to PD 2 T 3 ON * V V V OUT F R D* * P OUT OUT where P OUT =V OUT * I OUT ; R S =Inductor DC R; V D = Diode drop. The power dissipated in a switch loss is PD SW 2 T 3 ON * V V V OUT D IN R ON* * P OUT OUT V The power dissipated in rectifier diode is V PDd V D OUT * P OUT 20

21 3-Pin One-Cell Step-Up DC/DC Converter PHYSICA DIMENSIONS (unit: mm) SOT-23 D e b A2 A WITH PATING A1 E1 E A A e1 SEE VIEW B c BASE META SECTION A-A 1 VIEW B θ 5 GAUGE PANE SEATING PANE Note: 1. Refer to JEDEC MO Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil per side. 3. Dimension "E1" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. b c e S Y M B O A1 A2 D E E1 e1 1 θ MIN SOT-23 MIIMETERS 0.95 BSC 1.90 BSC 0. REF MAX. A

22 SOT-89 D A D1 C H E e e1 S Y M B O MIN. SOT-89 MIIMETERS MAX. A B B C D D B1 B E e BSC 2. e BSC H Note: 1. Refer to JEDEC TO-243AA. 2. Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3. Dimension "E" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 22

23 TO-92 (Straight lead option available in Bag packing) D b S E j S Y M B O MIN. TO-92 MIIMETERS MAX. A b D A E e e j S Note: 1. Refer to JEDEC TO Dimension "D" does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3. Dimension "A" does not include inter-lead flash or protrusions. 4. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. e1 e 23

24 TO-92 (Formed lead option available in Reel packing) P1 A W B E F P φd e T SYMBO W A B E F SPEC. 18.0± 9.0± 6.0± ± ± 0.5 SYMBO P P1 D e T SPEC B S C 12.7 BSC 4.0± 2.5 BSC ± 0.1 Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. ife Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. ife support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 24