MIC5236 Micrel, Inc. MIC5236 Low Quiescent Current µCap LDO Regulator General Description Features The MIC5236 is a low quiescent current, µCap low-dropout regulator. With a maximum operating input voltage of 30V and a quiescent current of 20µA, it is ideal for supplying keep-alive power in systems with high-voltage batteries. Capable of 150mA output, the MIC5236 has a dropout voltage of only 300mV. It can also survive an input transient of –20V to +60V. As a µCap LDO, the MIC5236 is stable with either a ceramic or a tantalum output capacitor. It only requires a 1.0µF output capacitor for stability. The MIC5236 includes a logic compatible enable input and an undervoltage error flag indicator. Other features of the MIC5236 include thermal shutdown, current-limit, overvoltage shutdown, load-dump protection, reverse leakage protections, and reverse battery protection. Available in the thermally enhanced SOIC-8 and MSOP-8, the MIC5236 comes in fixed 2.5V, 3.0V, 3.3V, 5.0V, and adjustable voltages. For other output voltages, contact Micrel. • Ultra-low quiescent current (IQ = 20µA @IO = 100µA) • Wide input range: 2.3V to 30V • Low dropout: 230mV @50mA; 300mV @150mA • Fixed 2.5V, 3.0V, 3.3V, 5.0V, and Adjustable outputs • ±1.0% initial output accuracy • Stable with ceramic or tantalum output capacitor • Load dump protection: –20V to +60V input transient survivability • Logic compatible enable input • Low output flag indicator • Overcurrent protection • Thermal shutdown • Reverse-leakage protection • Reverse-battery protection • High-power SOIC-8 and MSOP-8 Applications • Keep-alive supply in notebook and portable personal computers • Logic supply from high-voltage batteries • Automotive electronics • Battery-powered systems Typical Application VIN 30V MIC5236 IN OUT EN VOUT 3.0V/100µA VIN 5V IGND = 20µA ERR MIC5236 IN OUT EN GND Regulator with Low IO and Low IQ VIN 5V 47k COUT VERR Regulator with Error Output MIC5236 IN OUT EN ERR GND VOUT 3.0V/150mA R1 ADJ GND VOUT 3.0V/150mA R2 Regulator with Adjustable Output Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com July 2005 1 MIC5236 MIC5236 Micrel, Inc. Ordering Information Part Number* Voltage Junction Temp. Range Package Standard Pb-Free MIC5236BM MIC5236YM ADJ -40°C to +125°C 8-Pin SOIC MIC5236BMM MIC5236YMM ADJ -40°C to +125°C 8-Pin MSOP MIC5236-2.5BM MIC5236-2.5YM 2.5V -40°C to +125°C 8-Pin SOIC MIC5236-2.5BMM MIC5236-2.5YMM 2.5V -40°C to +125°C 8-Pin MSOP MIC5236-3.0BM MIC5236-3.0YM 3.0V -40°C to +125°C 8-Pin SOIC MIC5236-3.0BMM MIC5236-3.0YMM 3.0V -40°C to +125°C 8-Pin MSOP MIC5236-3.3BM MIC5236-3.3YM 3.3V -40°C to +125°C 8-Pin SOIC MIC5236-3.3BMM MIC5236-3.3YMM 3.3V -40°C to +125°C 8-Pin MSOP MIC5236-5.0BM MIC5236-5.0YM 5.0V -40°C to +125°C 8-Pin SOIC MIC5236-5.0BMM MIC5236-5.0YMM 5.0V -40°C to +125°C 8-Pin MSOP * Contact factory regarding availability for voltages not listed Pin Configuration ERR 1 8 GND ADJ 1 8 GND IN 2 7 GND IN 2 7 GND OUT 3 6 GND OUT 3 6 GND EN 4 5 GND EN 4 5 GND 8-Pin SOIC (M) 8-Pin MSOP (MM) 8-Pin SOIC (M) 8-Pin MSOP (MM) Pin Description Pin Number Pin Number Pin Name 1 /ERR 1 2 ADJ 2 IN 3 3 OUT 4 4 EN 5–8 5–8 GND MIC5236 Pin Function Error (Output): Open-collector output is active low when the output is out of regulation due to insufficient input voltage or excessive load. An external pull-up resistor is required. Adjustable Feedback Input. Connect to voltage divider network. Power supply input. Regulated Output Enable (Input): Logic low = shutdown; logic high = enabled. Ground: Pins 5, 6, 7, and 8 are internally connected in common via the leadframe. 2 July 2005 MIC5236 Micrel, Inc. Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (VIN), Note 3 .........................–20V to +60V Power Dissipation (PD), Note 4 ............... Internally Limited Junction Temperature (TJ) ....................................... +150°C Storage Temperature (TS) ........................ –65°C to +150°C Lead Temperature (soldering, 5 sec.) ........................ 260°C ESD Rating, Note 5 Supply Voltage (VIN) .................................... + 2.3V to +30V Junction Temperature (TJ) ........................ –40°C to +125°C Package Thermal Resistance MSOP (θJA) ........................................................................ 80°C/W SOIC (θJA) .......................................................... 63°C/W Electrical Characteristics VIN = 6.0V; VEN = 2.0V; COUT = 4.7µF, IOUT = 100µA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted. Symbol Parameter Conditions VOUT Output Voltage Accuracy variation from nominal VOUT Min Typ ΔVOUT/ΔT ppm/°C Output Voltage Note 6 50 –1 –2 Max Units 1 +2 % % Temperature Coefficient ΔVOUT/VOUT Line Regulation VIN = VOUT + 1V to 30V 0.2 0.5 1.0 % % ΔVOUT/VOUT Load Regulation IOUT = 100µA to 50mA, Note 7 0.15 0.3 0.5 % % IOUT = 100µA to 150mA, Note 7 0.3 0.6 1.0 % % IOUT = 100µA 50 100 mV IOUT = 50mA 230 400 mV IOUT = 150mA ΔV IGND Dropout Voltage, Note 8 Ground Pin Current IOUT = 100mA 270 300 500 mV VEN ≥ 2.0V, IOUT = 100µA 20 30 µA VEN ≥ 2.0V, IOUT = 50mA 0.5 0.8 mA VEN ≥ 2.0V, IOUT = 150mA 2.8 VEN ≥ 2.0V, IOUT = 100mA IGND(SHDN) ISC en Ground Pin in Shutdown Short Circuit Current Output Noise /ERR Output V/ERR Low Threshold High Threshold VOL /ERR Output Low Voltage ILEAK /ERR Output Leakage 1.5 VEN ≤ 0.6V, VIN = 30V VOUT = 0V 10Hz to 100kHz, VOUT = 3.0V, CL = 1.0µF % of VOUT mV mA 4.0 5.0 0.1 1 µA 260 350 mA 160 90 mA mA µVrms 94 % 95 98 % VIN = VOUT(nom) – 0.12VOUT, IOL = 200µA 150 250 400 mV mV VOH = 30V 0.1 1 2 µA µA % of VOUT Enable Input VIL VIH July 2005 Input Low Voltage regulator off Input High Voltage regulator on 0.6 2.0 3 V V MIC5236 MIC5236 Micrel, Inc. Symbol Parameter Conditions IIN Enable Input Current Min Typ Max Units VEN = 0.6V, regulator off 0.01 1.0 2.0 µA µA VEN = 2.0V, regulator on 0.15 1.0 2.0 µA µA VEN = 30V, regulator on 0.5 2.5 5.0 µA µA Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3: The absolute maximum positive supply voltage (60V) must be of limited duration (≤100ms) and duty cycle (≤1%). The maximum continuous supply voltage is 30V. Note 4: 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 termperature, and the regulator will go into thermal shutdown. The θJA of the MIC5236-x. xBM (all versions) is 63°C/W, and the MIC5236-x.xBMM (all versions) is 80°C/W, mounted on a PC board (see “Thermal Characteristics” for further details). Note 5. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. Note 6: Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range. Note 7: Regulation is measured at constant junction temperature using pulse testing with a low duty-cycle. Changes in output voltage due to heating effects are covered by the specification for thermal regulation. Note 8: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1.0V differential. MIC5236 4 July 2005 MIC5236 Micrel, Inc. Typical Characteristics OUTPUT VOLTAGE (V) 200 0 VOUT = 98% of Nominal VOUT 40 120 80 160 2.0 ILOAD = 150mA 1.5 ILOAD = 100mA 1.0 1.5 MIC5236-3.0 0 2.5 200 25 MIC5236-3.0 GROUND PIN CURRENT (µA) GROUND PIN CURRENT (mA) Ground Current vs. Output Current 3 VIN = 4V 2 1 0 VIN = 10V 0 20 40 60 80 100 120 140 160 20 GROUND CURRENT (mA) 60 50 40 1mA 100µA 30 20 10 0 0 GROUND CURRENT (mA) 4 10µA 1 2 3 4 5 6 7 200 100 MIC5236-3.0 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 5 VIN = 10V 5 0 MIC5236-3.0 0 100 200 300 400 0.08 VIN = 4V ILOAD = 10mA 0.04 0.02 MIC5236-3.0 MIC5236-3.0 4 ILOAD = 150mA 3 VOUT = 3V 2 1 0 500 ILOAD = 100µA 0 1 2 3 4 5 6 7 1.2 20 40 60 80 100 120 Ground Current vs. Temperature 1.0 0.8 VIN = 4V 0.6 ILOAD = 75mA 0.4 0.2 MIC5236-3.0 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) TEMPERATURE (°C) Ground Current vs. Temperature Output Voltage vs. Temperature Short Circuit Current vs. Temperature VIN = 4V ILOAD = 150mA 2 1 MIC5236-3.0 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 3.015 3.010 MIC5236-3.0 3.005 VIN = 4V ILOAD = 150mA 3.000 2.995 2.990 2.985 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 5 8 SUPPLY VOLTAGE (V) Ground Current vs. Temperature 0.06 Ground Current vs. Supply Voltage SUPPLY VOLTAGE (V) 3 July 2005 4.0 VIN = 4V 0 -40 -20 0 8 VOLTAGE OUTPUT (V) GROUND PIN CURRENT (µA) ILOAD = 10mA 70 3.5 10 0.10 MIC5236-3.0 80 3.0 ILOAD = 150mA 300 OUTPUT CURRENT (µA) Ground Current vs. Supply Voltage 90 2.5 400 Ground Pin Current vs. Output Current 15 OUTPUT CURRENT (mA) 100 2.0 500 SUPPLY VOLTAGE (V) OUTPUT CURRENT (mA) 4 MIC5236-3.0 GROUND CURRENT (mA) 100 ILOAD = 50mA GROUND CURRENT (mA) 300 Dropout Voltage vs. Temperature 600 ILOAD = 10mA 3.0 SHORT CIRCUIT CURRENT (mA) DROPOUT VOLTAGE (mV) 400 Dropout Characteristics 3.5 DROPOUT VOLTAGE (mV) Dropout Voltage vs. Output Current 285 280 275 270 VOUT = 0V 265 260 255 -40 -20 0 MIC5236-3.0 20 40 60 80 100 120 TEMPERATURE (°C) MIC5236 MIC5236 Micrel, Inc. Line Regulation 41 MIC5236-3.0 3.010 ILOAD = 10mA 3.006 3.004 3.002 0 5 10 15 20 25 30 35 REVERSE CURRENT (µA) Input Current 3.0 40 20 50 -20 -10 0 INPUT VOLTAGE (V) 10 2.5 2.0 1.5 Note 10 -40°C 30 +25°C 20 10 +85°C 10 15 20 5 EXTERNAL VOLTAGE (V) MIC5236 OUT EN GND MIC5236 2.0 1.5 1.0 0.5 MIC5236-3.0 0 1.25 MIC5236-3.0 VIN = 2.7V VOUT =2.62V No Load 0.5 0 0 70 60 0.5 1.0 1.5 SINK CURRENT (mA) 100 200 300 400 CURRENT LIMIT (mA) Dropout Induced Error Flag 2.0 1.00 Current Limit Induced Error Flag VIN = 6V VOUT = 2.03V RL = 6Ω 0.75 0.50 0.25 MIC5236-3.0 0 0 0.5 1.0 1.5 2.0 2.5 SINK CURRENT (mA) 3.0 Reverse Current (Grounded Input) Note 11 50 -40°C 40 +25°C 30 20 10 0 0 +85°C 10 15 20 5 EXTERNAL VOLTAGE (V) Note 10 IN 2.5 0 20 40 60 80 100 120 1.0 Reverse Current (Open Input) 40 0 0 OUTPUT-LOW VOLTAGE (V) MIC5236-3.0 60 60 37 3.0 TEMPERATURE (°C) VE N = 5V 80 R = 30Ω L 0 -30 38 REVERSE CURRENT (µA) INPUT CURRENT (mA) 100 39 36 -40 -20 0 INPUT VOLTAGE (V) 120 OUTPUT VOLTAGE (V) 3.012 40 Current Limit vs. Output Voltage 3.5 MIC5236-3.0 3.014 3.008 Overvoltage Threshold vs. Temperature OUTPUT-LOW VOLTAGE (V) 3.016 INPUT VOLTAGE (V) VOLTAGE OUTPUT (V) 3.018 Note 11 Reverse� Current MIC5236 IN EN OUT Reverse� Current GND 6 July 2005 MIC5236 Micrel, Inc. Functional Characteristics Load Transient Response VIN = 5V IL = 10mA TIME (250µs/div.) July 2005 VIN = 4V VOUT = 3V COUT = 15µF ESR = 200mΩ IOUT (100mA/div.) VEN (5V/div.) VOUT (100mV/div.) VOUT (2V/div.) Enable Transient Response TIME (250µs/div.) 7 MIC5236 MIC5236 Micrel, Inc. Functional Diagram IN OUT EN RFB1 Error Amplifier RFB2 RFB3 ERR VREF 1.23V Error Comparator MIC5236-x.x GND MIC5236 8 July 2005 MIC5236 Micrel, Inc. Application Information Error Detection Comparator Output The ERR pin is an open collector output which goes low when the output voltage drops 5% below it’s internally programmed level. It senses conditions such as excessive load (current limit), low input voltage, and over temperature conditions. Once the part is disabled via the enable input, the error flag output is not valid. Overvoltage conditions are not reflected in the error flag output. The error flag output is also not valid for input voltages less than 2.3V. The error output has a low voltage of 400mV at a current of 200µA. In order to minimize the drain on the source used for the pull-up, a value of 200k to 1MΩ is suggested for the error flag pull-up. This will guarantee a maximum low voltage of 0.4V for a 30V pull-up potential. An unused error flag can be left unconnected. The MIC5236 provides all of the advantages of the MIC2950: wide input voltage range, load dump (positive transients up to 60V), and reversed-battery protection, with the added advantages of reduced quiescent current and smaller package. Additionally, when disabled, quiescent current is reduced to 0.1µA. Enable A low on the enable pin disables the part, forcing the quiescent current to less than 0.1µA. Thermal shutdown and the error flag are not functional while the device is disabled. The maximum enable bias current is 2µA for a 2.0V input. An open collector pull-up resistor tied to the input voltage should be set low enough to maintain 2V on the enable input. Figure 1 shows an open collector output driving the enable pin through a 200k pull-up resistor tied to the input voltage. In order to avoid output oscillations, slow transitions from low to high should be avoided. 200k VIN 5V EN 4.75V 0V VALID ERROR Error Output VERR MIC5236 IN OUT 200k Output Voltage NOT VALID NOT VALID VOUT ERR Input Voltage COUT GND SHUTDOWN ENABLE 5V 1.3V 0V Figure 3. Error Output Timing Reverse Current Protection The MIC5236 is designed to limit the reverse current flow from output to input in the event that the MIC5236 output has been tied to the output of another power supply. See the graphs detailing the reverse current flow with the input grounded and open. Thermal Shutdown The MIC5236 has integrated thermal protection. This feature is only for protection purposes. The device should never be intentionally operated near this temperature as this may have detrimental effects on the life of the device. The thermal shutdown may become inactive while the enable input is transitioning a high to a low. When disabling the device via the enable pin, transition from a high to low quickly. This will insure that the output remains disabled in the event of a thermal shutdown. Current Limit Figure 4 displays a method for reducing the steady state short circuit current. The duration that the supply delivers current is set by the time required for the error flag output to discharge the 4.7µF capacitor tied to the enable pin. The off time is set by the 200K resistor as it recharges the 4.7µF capacitor, enabling the regulator. This circuit reduces the short circuit current from 280mA to 15mA while allowing for regulator restart once the short is removed. Figure 1. Remote Enable OUTPUT CAPACITOR ESR (Ω) Input Capacitor An input capacitor may be required when the device is not near the source power supply or when supplied by a battery. Small, surface mount, ceramic capacitors can be used for bypassing. Larger values may be required if the source supply has high ripple. Output Capacitor The MIC5236 has been designed to minimize the effect of the output capacitor ESR on the closed loop stability. As a result, ceramic or film capacitors can be used at the output. Figure 2 displays a range of ESR values for a 10µF capacitor. Virtually any 10µF capacitor with an ESR less than 3.4Ω is sufficient for stability over the entire input voltage range. Stability can also be maintained throughout the specified load and line conditions with 1µF film or ceramic capacitors. 5 4 3 Stable Region 2 1 0 TJ = 25°C VOUT = 10µF 5 10 15 20 25 30 INPUT VOLTAGE (V) Figure 2. Output Capacitor ESR July 2005 9 MIC5236 MIC5236 Micrel, Inc. which is typically 75°C/W. θCA is reduced because pins 5 through 8 can now be soldered directly to a ground plane which significantly reduces the case-to-sink thermal resistance and sink to ambient thermal resistance. Low-dropout linear regulators from Micrel are rated to a maximum junction temperature of 125°C. It is important not to exceed this maximum junction temperature during operation of the device. To prevent this maximum junction temperature from being exceeded, the appropriate ground plane heat sink must be used. 1N4148 200k VOUT ERR EN COUT GND 4.7µF SHUTDOWN ENABLE Figure 4. Remote Enable with Short-Circuit Current Foldback 900 COPPER AREA (mm2) 800 Thermal Characteristics The MIC5236 is a high input voltage device, intended to provide 150mA of continuous output current in two very small profile packages. The power SOIC-8 and power MSOP-8 allow the device to dissipate about 50% more power than their standard equivalents. One of the secrets of the MIC5236’s performance is its power SO-8 package featuring half the thermal resistance of a standard SO-8 package. Lower thermal resistance means more output current or higher input voltage for a given package size. Lower thermal resistance is achieved by joining the four ground leads with the die attach paddle to create a singlepiece electrical and thermal conductor. This concept has been used by MOSFET manufacturers for years, proving very reliable and cost effective for the user. Thermal resistance consists of two main elements, θJC (junction-to-case thermal resistance) and θCA (case-to-ambient thermal resistance). See Figure 5. θJC is the resistance from the die to the leads of the package. θCA is the resistance from the leads to the ambient air and it includes θCS (caseto-sink thermal resistance) and θSA (sink-to-ambient thermal resistance). 400 300 200 100 0.25 0.50 0.75 1.00 1.25 1.50 POWER DISSIPATION (W) Figure 6 shows copper area versus power dissipation with each trace corresponding to a different temperature rise above ambient. From these curves, the minimum area of copper necessary for the part to operate safely can be determined. The maximum allowable temperature rise must be calculated to determine operation along which curve. ΔT = TJ(max) – TA(max) TJ(max) = 125°C TA(max) = maximum ambient operating temperature For example, the maximum ambient temperature is 50°C, the ΔT is determined as follows: ΔT = 125°C – 50°C ΔT = 75°C Using Figure 6, the minimum amount of required copper can be determined based on the required power dissipation. Power dissipation in a linear regulator is calculated as follows: PD = (VIN – VOUT) IOUT + VIN · IGND If we use a 3V output device and a 28V input at moderate output current of 25mA, then our power dissipation is as follows: PD = (28V – 3V) × 25mA + 28V × 250µA PD = 625mW + 7mW PD = 632mW From Figure 6, the minimum amount of copper required to operate this application at a ΔT of 75°C is 25mm2. Quick Method Determine the power dissipation requirements for the design along with the maximum ambient temperature at which the device will be operated. Refer to Figure 7, which shows safe operating curves for three different ambient temperatures: qJA ground plane heat sink area AMBIENT printed circuit board Figure 5. Thermal Resistance Using the power SOIC-8 reduces the θJC dramatically and allows the user to reduce θCA. The total thermal resistance, θJA (junction-to-ambient thermal resistance) is the limiting factor in calculating the maximum power dissipation capability of the device. Typically, the power SOIC-8 has a θJC of 20°C/W, this is significantly lower than the standard SOIC-8 MIC5236 500 Figure 6. Copper Area vs. Power-SOIC Power Dissipation (∆TJA) SOP-8 qCA 600 0 0 Power SOIC-8 Thermal Characteristics qJC 700 100°C VIN 5V VERR MIC5236 IN OUT 40°C 50°C 55°C 65°C 75°C 85°C 200k 10 July 2005 MIC5236 Micrel, Inc. 25°C, 50°C and 85°C. From these curves, the minimum amount of copper can be determined by knowing the maximum power dissipation required. If the maximum ambient temperature is 50°C and the power dissipation is as above, 632mW, the curve in Figure 7 shows that the required area of copper is 25mm2. The θJA of this package is ideally 63°C/W, but it will vary depending upon the availability of copper ground plane to which it is attached. 900 COPPER AREA (mm2) 800 COPPER AREA (mm2) TJ = 125°C 700 85°C 50°C 25°C 50°C 25°C 500 400 300 200 100 0 0 0.25 0.50 0.75 1.00 1.25 1.50 POWER DISSIPATION (W) Figure 9. Copper Area vs. Power-MSOP Power Dissipation (TA) 600 500 400 Power MSOP-8 Thermal Characteristics 300 The power-MSOP-8 package follows the same idea as the power-SO-8 package, using four ground leads with the die attach paddle to create a single-piece electrical and thermal conductor, reducing thermal resistance and increasing power dissipation capability. Quick Method Determine the power dissipation requirements for the design along with the maximum ambient temperature at which the device will be operated. Refer to Figure 9, which shows safe operating curves for three different ambient temperatures, 25°C, 50°C, and 85°C. From these curves, the minimum amount of copper can be determined by knowing the maximum power dissipation required. If the maximum ambient temperature is 50°C, and the power dissipation is 639mW, the curve in Figure 9 shows that the required area of copper is 110mm2,when using the power MSOP-8. Adjustable Regulator Application 200 100 0 0 0.25 0.50 0.75 1.00 1.25 1.50 POWER DISSIPATION (W) 100°C 700 40°C 50°C 55°C 65°C 75°C 85°C Figure 7. Copper Area vs. Power-SOIC Power Dissipation (TA) COPPER AREA (mm2) 85°C 600 900 800 T = 125°C J 700 600 500 400 300 200 100 0 0 0.25 0.50 0.75 1.00 1.25 1.50 POWER DISSIPATION (W) MIC5236BM/MM Figure 8. Copper Area vs. Power-MSOP Power Dissipation (∆TJA) VIN 2 4 The same method of determining the heat sink area used for the power-SOIC-8 can be applied directly to the powerMSOP-8. The same two curves showing power dissipation versus copper area are reproduced for the power-MSOP-8 and they can be applied identically, see Figures 8 and 9. IN OUT EN ADJ GND 5-8 3 1 VOUT R1 R2 1µF Figure 10. Adjustable Voltage Application The MIC5236BM/MM can be adjusted from 1.24V to 20V by using two external resistors (Figure 10). The resistors set the output voltage based on the following equation: R1 VOUT = VREF (1 + ) R2 Where VREF = 1.23V. July 2005 11 MIC5236 MIC5236 Micrel, Inc. Package Information 0.026 (0.65) MAX) PIN 1 0.157 (3.99) 0.150 (3.81) DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) 0.050 (1.27) TYP 0.064 (1.63) 0.045 (1.14) 45° 0.0098 (0.249) 0.0040 (0.102) 0.197 (5.0) 0.189 (4.8) 0°–8° 0.010 (0.25) 0.007 (0.18) 0.050 (1.27) 0.016 (0.40) SEATING PLANE 0.244 (6.20) 0.228 (5.79) 8-Pin SOIC (M) 0.122 (3.10) 0.112 (2.84) 0.199 (5.05) 0.187 (4.74) DIMENSIONS: INCH (MM) 0.120 (3.05) 0.116 (2.95) 0.036 (0.90) 0.032 (0.81) 0.043 (1.09) 0.038 (0.97) 0.012 (0.30) R 0.012 (0.03) 0.0256 (0.65) TYP 0.008 (0.20) 0.004 (0.10) 5° MAX 0° MIN 0.007 (0.18) 0.005 (0.13) 0.012 (0.03) R 0.039 (0.99) 0.035 (0.89) 0.021 (0.53) 8-Pin MSOP (MM) 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 This 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. © 2005 Micrel, Inc. MIC5236 12 July 2005