MIC5375/6/7/8 High Performance Low Dropout 150mA LDO General Description Features The MIC5375/6/7/8 is an advanced general purpose linear regulator offering low dropout in an ultra small package. The MIC5375/6 provides fixed output voltage in a 1mm x 1mm Thin MLF® package while the MIC5377/8 provides adjustable output voltage in a 1.2mm x 1.2mm Thin MLF® package. When the MIC5376/8 is disabled an internal resistive load is automatically applied to the output to discharge the output capacitor. The MIC5375/6/7/8 is capable of sourcing 150mA output current with low dropout making it an ideal solution for any portable electronic application. Ideal for battery powered applications, the MIC5375/6/7/8 offers 2% initial accuracy, low dropout voltage (120mV at 150mA), and ground current (typically 29µA). The MIC5375/6/7/8 can also be put into a zero-off-mode current state, drawing virtually no current when disabled. The MIC5375/6 is available in lead-free (RoHS compliant) 1mm x 1mm Thin MLF® and SC-70-5. The MIC5377/8 is available in lead-free (RoHS compliant) 1.2mm x 1.2mm Thin MLF® and SC-70-5. The MIC5375/6/7/8 has an operating junction temperature range of –40°C to 125°C. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. • • • • • • • • • • • • • 4-pin 1mm x 1mm Thin MLF® package– MIC5375/6 8-pin 1.2mm x 1.2mm Thin MLF® package– MIC5377/8 Low cost 5-Pin SC-70 package Low dropout voltage – 120mV at 150mA Input voltage range: 2.5V to 5.5V 150mA guaranteed output current Stable with 0402 ceramic capacitors as low as 1µF Low quiescent current – 29µA Excellent load/line transient response Fixed output voltages – MIC5375/6 Adjustable output – MIC5377/8 Output discharge circuit – MIC5376/8 High output accuracy – ±2% initial accuracy • Thermal shutdown and current limit protection Applications • • • • Mobile phones Digital cameras GPS, PDAs, PMP, handhelds Portable electronics ___________________________________________________________________________________________________________ Typical Application MIC5375/6-xxYMT VIN VOUT VBAT 1µF EN VOUT = 2.8V 1µF GND Typical Application MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com January 2009 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Block Diagram VIN EN VOUT LDO Auto Discharge* Reference *MIC5376 Only GND MIC5375/6 Block Diagram VIN EN VOUT LDO ADJ Auto Discharge* Reference *MIC5378 Only GND MIC5377/8 Block Diagram January 2009 2 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Ordering Information Part Number Marking Code Output Voltage Temperature Range Package Lead Finish MIC5375-2.8YMT J7 2.8V –40°C to +125°C 4-Pin 1mm x 1mm Thin MLF® Pb-Free MIC5375-2.8YC5 G7J 2.8V –40°C to +125°C 5-Pin SC-70 Pb-Free MIC5376-2.8YMT* TT 2.8V –40°C to +125°C 4-Pin 1mm x 1mm Thin MLF® Pb-Free MIC5376-2.8YC5* 2T8 2.8V –40°C to +125°C 5-Pin SC-70 Pb-Free ® MIC5377YMT AH ADJ –40°C to +125°C 8-Pin 1.2mm x 1.2mm Thin MLF MIC5377YC5 AHA ADJ –40°C to +125°C 5-Pin SC-70 Pb-Free Pb-Free MIC5378YMT* 67A ADJ –40°C to +125°C 8-Pin 1.2mm x 1.2mm Thin MLF® Pb-Free MIC5378YC5* A67 ADJ –40°C to +125°C 5-Pin SC-70 Pb-Free Notes: 1. Other voltages available. Contact Micrel for details. 2. Under bar symbol ( _ ) may not be to scale. 3. Thin MLF ▲ = Pin 1 identifier. 4. Thin MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. * MIC5376/8 offers Auto-Discharge function. ® ® January 2009 3 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Pin Configuration EN GND VIN 1 3 2 4 NC 5 VOUT 4-Pin 1mm x 1mm Thin MLF® (MT) MIC5375/6 Fixed Output (Top View) 5-Pin SC-70 (C5) MIC5375/6 Fixed Output 8 EN GND VIN 1 3 2 ADJ 7 1 EN 2 VIN GND 6 GND 5 3 4 VOUT 4 ADJ ® 8-Pin 1.2mm x 1.2mm Thin MLF (MT) MIC5377/8 Adjustable Output (Bottom View) 5 VOUT 5-Pin SC-70 (C5) MIC5377/8 Adjustable Output Pin Description Pin No. MIC5375/6 TMLF 1x1 Pin No. MIC5375/6 SC-70-5 Pin No. MIC5377/8 TMLF 1.2x1.2 Pin No. MIC5377/8 SC-70-5 Pin Name 3 3 1 3 EN Enable Input. Active High. High = on, low = off. Do not leave floating. 4 1 2 1 VIN Supply Input. 1 5 3 5 VOUT Output Voltage. 2 2 4,5,6,8 2 GND Ground. – – 7 4 ADJ Adjust Pin: Feedback input from external divider. – 4 – – NC No connection. – – EPAD HS Pad January 2009 Pin Function 4 Exposed Heatsink Pad connected to ground internally. M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ............................................... 0V to 6V Enable Voltage (VEN).............................................. 0V to VIN Power Dissipation (PD) ........................... Internally Limited(3) Lead Temperature (soldering, 5 sec)......................... 260°C Junction Temperature (TJ) ........................–40°C to +125°C Storage Temperature (Ts) .........................–65°C to +150°C ESD Rating(4) .................................................................. 2kV Supply Voltage (VIN)......................................... 2.5V to 5.5V Enable Voltage (VEN).............................................. 0V to VIN Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 1mm x 1mm Thin MLF-4 (θJA) .........................250°C/W 1.2mm x 1.2mm Thin MLF-8(θJA) ....................250°C/W SC-70-5 (θJA) ................................................256.5°C/W Electrical Characteristics(5) VIN = VEN = VOUT + 1V; CIN = COUT = 1µF for Vout ≥ 2.5V, CIN = COUT = 2.2µF for VOUT < 2.5V; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C to +125°C, unless noted. Parameter Condition Min Max Units Output Voltage Accuracy Variation from nominal VOUT –2.0 Typ +2.0 % Variation from nominal VOUT –3.0 +3.0 % Line Regulation VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 0.3 % Load Regulation(6) IOUT = 100µA to 150mA 0.3 1.0 % IOUT = 50mA 45 100 mV (7) Dropout Voltage IOUT = 150mA 120 200 mV Ground Pin Current(8) IOUT = 0mA 29 45 µA Ground Pin Current in Shutdown VEN ≤ 0.2V 0.05 1 µA Ripple Rejection f = 1kHz; COUT = 1µF 60 dB f = 10kHz; COUT = 1µF 50 dB Current Limit VOUT = 0V 200 370 550 mA Output Voltage Noise COUT = 1µF, 10Hz to 100kHz 200 µVRMS Auto-Discharge NFET Resistance VEN = 0V; VIN = 3.6V 30 Ω Reference Voltage (MIC5377/8) Reference Voltage Accuracy 0.97 Adjust Pin Input Current 1 1.03 0.01 V μA Enable Input Enable Input Voltage Logic Low 0.2 Logic High Enable Input Current Turn-on Time V V 1.2 VIL ≤ 0.2V 0.01 1 µA VIH ≥ 1.2V 0.01 1 µA 45 100 µs COUT = 1µF; IOUT = 150mA Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. 6. Regulation is measured at constant junction temperature using low duty cycle pulse testing. 7. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V. 8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current. January 2009 5 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Typical Characteristics 100µA 50mA 30 20 VIN = VEN = VOUT + 1V VOUT = 2.8V 10 CIN = COUT = 1µF 2.9 2.86 25 50 75 100 TEMPERATURE (°C) 125 VOUT = 2.8V CIN = COUT = 1µF 100µA 2.78 150mA 2.74 2.7 3 5.5 Output Voltage vs. Temperature 2.7 2.6 0 45 100mA 40 35 30 25 20 15 3 100µA VIN = VEN VOUT = 2.8V CIN = COUT = 1µF 3.5 4 4.5 5 SUPPLY VOLTAGE (V) IN OUT 100 80 60 40 20 25 50 75 100 125 150 LOAD CURRENT (mA) Dropout Voltage vs. Temperature 160 150mA 50 V = 2.8V OUT 120 C = C = 1µF 5.5 150mA 140 120 100 80 100mA VOUT = 2.8V 50mA 60 40 20 CIN = COUT = 1µF 0 10mA TEMPERATURE (°C) 10 1 2.8 0.1 January 2009 120 80 TEMPERATURE (°C) 100 60 40 0 20 2.7 -40 Ground Current vs. Supply Voltage +1V Dropout Voltage vs. Load Current 0 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) OUT Output Noise Spectral Density VIN = VEN = VOUT + 1 -20 OUTPUT VOLTAGE (V) 3.5 4 4.5 5 SUPPLY VOLTAGE (V) VOUT = 2.8V 2.9 C = C = 1µF IN OUT 2.6 2.8 55 2.82 3 2.9 C = C = 1µF IN OUT =V 25 50 75 100 125 150 OUTPUT CURRENT (mA) 140 VIN = VEN = VOUT + 1V VOUT = 2.8V Output Voltage vs. Supply Voltage VEN = VIN = VOUT + 1 Output Voltage vs. Load Current EN = 2.8V 120 40 OUTPUT VOLTAGE (V) 50 0 0 OUTPUT VOLTAGE (V) 3 100mA 15 0 5.5 =V OUT 80 150mA GROUND CURRENT (µA) GROUND CURRENT (µA) 60 IN V 100 Ground Current vs. Temperature V 20 60 FREQUENCY (Hz) 3 3.5 4 4.5 5 INPUT VOLTAGE (V) 25 40 300 2.5 100k 30 0 350 35 20 1k 400 40.0 40 -20 0 10 450 45 -40 VIN = VOUT = + 1V VOUT = 2.8V COUT = 1µF GROUND CURRENT (µA) 150mA VOUT = 2.8V DROPOUT VOLTAGE (mV) CURRENT LIMIT (mA) GAIN (dB) 50mA 500 50 CIN = COUT = 1µF DROPOUT VOLTAGE (mV) 550 100µA Ground Current vs. Output Current Current Limit vs. Input Voltage PSRR 0.01 V = V IN OUT + 1V VOUT = 2.8V COUT = 1µF 0.001 1k 100k 10 FREQUENCY (Hz) 6 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Functional Characteristics January 2009 7 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Application Information Enable/Shutdown The MIC5375/6/7/8 is provided with an active-high enable pin that allows the regulator to be disabled. Forcing the enable pin low disables the regulator and sends it into a “zero” off-mode-current state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. MIC5375/6/7/8 is Low noise 150mA LDO. The MIC5376/8 includes an auto-discharge circuit that is switched on when the regulator is disabled through the enable pin. The MIC5375/6/7/8 regulator is protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Input Capacitor The MIC5375/6/7/8 is a high-performance, high bandwidth device. An input capacitor of 1µF is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional high-frequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. Adjustable Regulator Design The MIC5377/8 adjustable version allows setting the output voltage down to 1V with the use of two external feedback resistors. J1 VIN J5 EN J2 GND Output Capacitor For output voltages ≥ 2.5V, the MIC5375/6/7/8 requires a minimum 1µF output capacitor. For output voltages below 2.5V a 2.2µF minimum output capacitor is required. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors are not recommended because they may cause high frequency oscillation. The output capacitor can be increased, but performance does not improve significantly with larger capacitance. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric capacitors change value by as much as 50% and 60%, respectively, over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. C1 2.2µF 6.3V U1 MIC5377/8-xxYMT 2 VIN VOUT 3 1 EN GND ADJ 7 C2 2.2µF 6.3V J3 VOUT R1 619k R2 267k 4,5,6,8 J4 GND ⎛ R ⎞ VOUT = VREF ⎜⎜1 + 1 ⎟⎟ R2 ⎠ ⎝ Thermal Considerations The MIC5375/6/7/8 is designed to provide 150mA of continuous current in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. For example if the input voltage is 3.6V, the output voltage is 2.8V, and the output current = 150mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN – VOUT1) I OUT + VIN IGND Because this device is CMOS and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.6V – 2.8V) × 150mA PD = 0.12W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: No-Load Stability Unlike many other voltage regulators, the MIC5375/6/7/8 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. ⎛ TJ(max) − TA PD(max) = ⎜⎜ θ JA ⎝ ⎞ ⎟ ⎟ ⎠ TJ(max) = 125°C, the maximum junction temperature of the die, θJA thermal resistance = 250°C/W for the YMT package and 256.5°C/W for the SC-70-5 package. January 2009 8 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Therefore the maximum ambient operating temperature of 95°C is allowed in a 1mm x 1mm TMLF® package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the “Regulator Thermals” section of Micrel’s Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 250°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5375-2.8YMT at an input voltage of 3.6V and 150mA load with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.12W = (125°C – TA)/(250°C/W) TA = 95°C January 2009 9 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 J1 VIN 2.5V - 5.5V U1 MIC5375/6-xxYMT 4 VIN VOUT 1 C1 1µF/10V J2 GND 2 GND EN 3 C2 1µF/10V R1 100k J3 VOUT J4 GND J5 EN Bill of Materials Item Part Number GRM155R61A105KE15D 0402ZD105MAT AVX(3) CRCW0603100KFKEA Vishay(4) MIC5375/6-xxYMT Qty. Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2 Resistor, 100k, 1%, 1/16W, Size 0603 1 High Performance 150mA LDO, 4 Pin 1mm x 1mm Thin MLF® 1 Murata TDK(2) U1 Description (1) C1005X5R1A105K C1, C2 R1 Manufacturer Micrel, Inc. (5) Notes: 1. Murata: www.murata.com 2. TDK: www.tdk.com 3. AVX: www.avx.com 4. Vishay: www.vishay.com 5. Micrel, Inc.: www.micrel.com January 2009 10 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 J1 VIN J5 EN R3 100k C1* 2.2µF 6.3V U1 MIC5375/6YC5 1 VIN VOUT 5 3 EN GND NC 4 C2* 2.2µF 6.3V 2 J2 GND J3 VOUT J4 GND Bill of Materials Item Part Number JMK105BJ225MV-F C1, C2 GRM155R60G225ME15D CV05X5R225K10AB C1, C2 R1 Manufacturer Description Qty. Capacitor, 2.2µF, 6.3V, X5R, Size 0402 2 Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2 (1) Taiyo Yuden Murata(2) (3) AVX/Kyocera GRM155R61A105KE15D Murata(1) C1005X5R1A105KT TDK(2) CV05X5R105K10AH AVX/Kyocera(3) CRCW0402619KFKEA Vishay(4) Resistor, 619kΩ, 1%, 1/16W, Size 0402 1 (4) R2 CRCW04022673KFKEA Vishay Resistor, 267kΩ, 1%, 1/16W, Size 0402 1 R3 CRCW04021003KFKEA Vishay(4) Resistor, 100kΩ, 1%, 1/16W, Size 0402 1 High Performance 150mA LDO, 5-Pin SC-70 1 U1 MIC5375/6YC5 Micrel, Inc. (5) Notes: 1. Taiyo Yuden: 2. Murata: www.murata.com 3. AVX/Kyocera: www.avx.com 4. Vishay: www.vishay.com 5. Micrel, Inc.: www.micrel.com * CIN = COUT = 1µF for Vout ≥ 2.5V, CIN = COUT = 2.2µF for VOUT < 2.5V January 2009 11 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 J1 VIN J5 EN R3 100k C1* 2.2µF 6.3V U1 MIC5377/8-xxYMT 2 VIN VOUT 3 1 EN GND ADJ 4,5,6,8 J2 GND 7 C2* 2.2µF 6.3V J3 VOUT R1 619k R2 267k J4 GND Bill of Materials Item Part Number JMK105BJ225MV-F C1, C2 GRM155R60G225ME15D CV05X5R225K10AB C1, C2 R1 Manufacturer Description Qty. Capacitor, 2.2µF, 6.3V, X5R, Size 0402 2 Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2 (1) Taiyo Yuden Murata(2) (3) AVX/Kyocera GRM155R61A105KE15D Murata(1) C1005X5R1A105KT TDK(2) CV05X5R105K10AH AVX/Kyocera(3) CRCW0402619KFKEA Vishay(4) Resistor, 619kΩ, 1%, 1/16W, Size 0402 1 (4) R2 CRCW04022673KFKEA Vishay Resistor, 267kΩ, 1%, 1/16W, Size 0402 1 R3 CRCW04021003KFKEA Vishay(4) Resistor, 100kΩ, 1%, 1/16W, Size 0402 1 High Performance 150mA LDO, 8 Pin 1.2mm x 1.2mm Thin MLF® 1 U1 MIC5377/8-xxYMT Micrel, Inc. (5) Notes: 1. Taiyo Yuden: 2. Murata: www.murata.com 3. AVX/Kyocera: www.avx.com 4. Vishay: www.vishay.com 5. Micrel, Inc.: www.micrel.com * CIN = COUT = 1µF for Vout ≥ 2.5V, CIN = COUT = 2.2µF for VOUT < 2.5V January 2009 12 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 J1 VIN J5 EN R3 100k C1* 2.2µF 6.3V U1 MIC5377/8YC5 1 VIN VOUT 5 3 EN GND ADJ 2 J2 GND 4 C2* 2.2µF 6.3V J3 VOUT R1 619k R2 267k J4 GND Bill of Materials Item Part Number JMK105BJ225MV-F C1, C2 GRM155R60G225ME15D CV05X5R225K10AB C1, C2 R1 Manufacturer Description Qty. Capacitor, 2.2µF, 6.3V, X5R, Size 0402 2 Capacitor, 1µF Ceramic, 10V, X5R, Size 0402 2 (1) Taiyo Yuden Murata(2) (3) AVX/Kyocera GRM155R61A105KE15D Murata(1) C1005X5R1A105KT TDK(2) CV05X5R105K10AH AVX/Kyocera(3) CRCW0402619KFKEA Vishay(4) Resistor, 619kΩ, 1%, 1/16W, Size 0402 1 (4) R2 CRCW04022673KFKEA Vishay Resistor, 267kΩ, 1%, 1/16W, Size 0402 1 R3 CRCW04021003KFKEA Vishay(4) Resistor, 100kΩ, 1%, 1/16W, Size 0402 1 High Performance 150mA LDO, 5-Pin SC-70 1 U1 MIC5377/8YC5 Micrel, Inc. (5) Notes: 1. Taiyo Yuden: 2. Murata: www.murata.com 3. AVX/Kyocera: www.avx.com 4. Vishay: www.vishay.com 5. Micrel, Inc.: www.micrel.com * CIN = COUT = 1µF for Vout ≥ 2.5V, CIN = COUT = 2.2µF for VOUT < 2.5V January 2009 13 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 PCB Layout Recommendations (1mm x 1mm 4-Pin Thin MLF®) Fixed Top Layer Bottom Layer January 2009 14 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 PCB Layout Recommendations (1.2mm x 1.2mm 8-Pin Thin MLF®) Adjustable Top Layer Bottom Layer January 2009 15 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 PCB Layout Recommendations (SC-70-5) Top Layer Bottom Layer January 2009 16 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 Package Information 4-Pin 1mm x 1mm Thin MLF® (MT) 8-Pin 1.2mm x 1.2mm Thin MLF® (MT) January 2009 17 M9999-011309-B Micrel, Inc. MIC5375/6/7/8 5-Pin SC-70 (C5) MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2008 Micrel, Incorporated. January 2009 18 M9999-011309-B