MIC2950*/2951 150mA Low-Dropout Voltage Regulator General Description Features The MIC2950 and MIC2951 are “bulletproof” micropower • High accuracy 3.3, 4.85, or 5V, guaranteed 150mA voltage regulators with very low dropout voltage (typically output 40mV at light loads and 250mV at 100mA), and very low • Extremely low quiescent current quiescent current. Like their predecessors, the LP2950 and • Low-dropout voltage LP2951, the quiescent current of the MIC2950/MIC2951 • Extremely tight load and line regulation increases only slightly in dropout, thus pro-longing battery • Very low temperature coefficient life. The MIC2950/MIC2951 are pin for pin compatible with • Use as regulator or reference the LP2950/LP2951, but offer lower dropout, lower • Needs only 1.5µF for stability quiescent current, reverse battery, and automotive load dump protection. • Current and thermal limiting • Unregulated DC input can withstand –20V reverse The key additional features and protection offered include battery and +60V positive transients higher output current (150mA), positive transient protection for up to 60V (load dump), and the ability to survive an MIC2951 Version Only unregulated input voltage transient of –20V below ground • Error flag warns of output dropout (reverse battery). • Logic-controlled electronic shutdown The plastic DIP and SOIC versions offer additional system • Output programmable from 1.24 to 29V functions such as programmable output voltage and logic controlled shutdown. The 3-pin TO-92 MIC2950 is pincompatible with the older 5V regulators. Applications These system functions also include an error flag output • Automotive electronics that warns of a low output voltage, which is often due to • Voltage reference failing batteries on the input. This may also be used as a • Avionics power-on reset. A logic-compatible shutdown input is also available which enables the regulator to be switched on and • Cellular telephones off. This part may also be pin-strapped for a 5 V output, or • Battery powered equipment programmed from 1.24 V to 29 V with the use of two • SMPS post-regulator external resistors. • High efficiency linear power supplies Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. ___________________________________________________________________________________________________________ Block Diagram * MIC2950 Discontinuance September 2007. MM8 is a registered trademark of Micrel, 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 February 2010 M9999-021610 Micrel, Inc. MIC2950/2951 The MIC2950 is available as either an -05 or -06 version. The -05 and -06 versions are guaranteed for junction temperatures from –40°C to +125°C; the -05 version has a tighter output and reference voltage specification range over temperature. The MIC2951 is available as an -02 or -03 version. The MIC2950 and MIC2951 have a tight initial tolerance (0.5% typical), a very low output voltage temperature coefficient which allows use as a low-power voltage reference, and extremely good load and line regulation (0.04% typical). This greatly reduces the error in the overall circuit, and is the result of careful design techniques and process control. ___________________________________________________________________________________________________________ Ordering Information Part Number Voltage Accuracy Junction Temperature Range Package Lead Finish MIC2950-05BZ* 5.0V 0.5% –40° to +125°C 3-Pin TO-92 Standard MIC2950-06BZ* 5.0V 1.0% –40° to +125°C 3-Pin TO-92 Standard MIC2951-02BM 5.0V 0.5% –40° to +125°C 8-Pin SOIC Standard MIC2951-03BM 5.0V 1.0% –40° to +125°C 8-Pin SOIC Standard MIC2951-02BN** 5.0V 0.5% –40° to +125°C 8-Pin Plastic DIP Standard MIC2951-03BN 5.0V 1.0% –40° to +125°C 8-Pin Plastic DIP Standard MIC2951-03BMM 5.0V 1.0% –40° to +125°C 8-Pin MSOP Standard MIC2951-3.3BM 3.3V 1.0% –40° to +125°C 8-Pin SOIC Standard MIC2950-05YZ*/*** 5.0V 0.5% –40° to +125°C 3-Pin TO-92 Pb-Free MIC2950-06YZ*/*** 5.0V 1.0% –40° to +125°C 3-Pin TO-92 Pb-Free MIC2951-02YM*** 5.0V 0.5% –40° to +125°C 8-Pin SOIC Pb-Free MIC2951-03YM*** 5.0V 1.0% –40° to +125°C 8-Pin SOIC Pb-Free MIC2951-03YN*** 5.0V 1.0% –40° to +125°C 8-Pin Plastic DIP Pb-Free MIC2951-03YMM*** 5.0V 1.0% –40° to +125°C 8-Pin MSOP Pb-Free MIC2951-3.3YM*** 3.3V 1.0% –40° to +125°C 8-Pin SOIC Pb-Free Note: * TO-92 Package discontinuance notification issued September 2007. End-of-life-buy offer thru December 31, 2007. Contact factory for additional information. ** Contact factory for Pb-Free version. *** Pb-Free RoHS compliant with ‘high-melting solder’ exemption. February 2010 2 M9999-021610 Micrel, Inc. MIC2950/2951 Pin Configuration DIP (N), SOIC (M), MM8® (MM) (Top View) TO-92 (Z) (Bottom View) Pin Description Pin No. MIC2950 Pin No. MIC2951 Pin Name 3 2 1 February 2010 Pin Function 1 OUT Regulated Output. 2 SNS Sense (Input): Output-voltage sensing end of internal voltage divider for fixed 5V operation. Not used in adjustable configuration. 3 SHDN Shutdown/Enable (Input): TTL compatible input. High = shutdown, low or open = enable. 4 GND Ground. 5 ERR Error Flag (Output): Active low, open-collector output (low = error, floating = normal). 6 TAP 3.3V/4.85/5V Tap: Output of internal voltage divider when the regulator is configured for fixed operation. Not used in adjustable configuration. 7 FB Feedback (Input): 1.235V feedback from internal voltage divider’s TAP (for fixed operation) or external resistor network (adjustable configuration). 8 IN Unregulated Supply Input. 3 M9999-021610 Micrel, Inc. MIC2950/2951 Absolute Maximum Ratings(1) Operating Ratings(2) Input Supply Voltage (VIN) (5) .............................–20 to +60V Feedback Input Voltage (VFB) (6, 7) ....................–1.5 to +26V Shutdown Input Voltage (VSHDN) (6) ...................–0.3 to +30V Power Dissipation (PD) (4) ..........................Internally Limited Lead Temperature (soldering, 5 sec.)........................ 260°C Storage Temperature ................................–65°C to +150°C ESD(3) Input Supply Voltage (VIN)................................+2.0 to +30V Junction Temperature (TJ) (4) MIC2950-05/MIC2950-06 ................... –40°C to +125°C MIC2951-02/MIC2950-03 ................... –40°C to +125°C Electrical Characteristics(1) VIN = 6V; IL = 100µA; CL = 1µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; Note 8; unless noted. Parameter Condition Output Voltage TJ = 25°C MIC295x-02/-05 (±0.5%) 4.975 MIC295x-03/06 (±1%) 4.950 MIC2951-3.3 (±1%) 3.267 3.300 MIC2951-4.8 (±1%) 4.802 4.850 MIC295x-02/-05 (±0.5%) 4.950 MIC295x-03/-06 (±1%) 4.925 5.075 V MIC2951-3.3 (±1%) 3.251 3.350 V Output Voltage –25°C ≤ TJ ≤ +85°C Output Voltage Over Full Temperature Range –40°C to +125°C Output Voltage Over Load Variation Output Voltage Temperature Coefficient Line Regulation February 2010 Min Typ Max Units 5.000 5.025 V 5.000 5.050 V 3.333 V 4.899 V 5.050 V MIC2951-4.8 (±1%) 4.777 4.872 V MIC295x-02/-05 (±0.5%) 4.940 5.060 V MIC295x-03/06 (±1%) 4.900 5.100 V MIC2951-3.3 (±1%) 3.234 3.366 V MIC2951-4.8 (±1%) 4.753 4.947 V MIC295x-02/-05 (±0.5%), 100µA ≤ IL ≤ 150mA, TJ ≤ TJ(max) 4.930 5.070 V MIC295x-03/-06 (±1%), 100µA ≤ IL ≤ 150mA, TJ ≤ TJ(max) 4.880 5.120 V MIC2951-3.3 (±1%), 100µA ≤ IL ≤ 150mA, TJ ≤ TJ(max) 3.221 3.379 V MIC2951-4.8 (±1%), 100µA ≤ IL ≤ 150mA, TJ ≤ TJ(max) 4.733 4.967 V 100 ppm/°C MIC295x-02/-05 (±0.5%), Note 9 20 MIC295x-03/-06 (±1%), Note 9 50 150 ppm/°C MIC2951-3.3 (±1%), Note 9 50 150 ppm/°C MIC2951-4.8 (±1%), Note 9 50 150 ppm/°C MIC295x-02/-05 (±0.5%), Notes 10, 11 0.03 0.10 0.20 % % MIC295x-03/-06 (±1%), Notes 10, 11 0.04 0.20 0.40 % % MIC2951-3.3 (±1%), Notes 10, 11 0.04 0.20 0.40 % % MIC2951-4.8 (±1%), Notes 10, 11 0.04 0.20 0.40 % % 4 M9999-021610 Micrel, Inc. MIC2950/2951 Parameter Condition Typ Max Units Load Regulation MIC295x-02/-05 (±0.5%), 100µA ≤ IL ≤ 150mA, Note 10 0.04 0.10 0.20 % % MIC295x-03/-06 (±1%), 100µA ≤ IL ≤ 150mA, Note 10 0.10 0.20 0.30 % % MIC2951-3.3 (±1%), 100µA ≤ IL ≤ 150mA, Note 10 0.10 0.20 0.30 % % MIC2951-4.8 (±1%), 100µA ≤ IL ≤ 150mA, Note 10 0.10 0.20 0.30 % % MIC295x-02/-03/-05/-06, IL = 100µA, Note 12 40 80 140 mV mV MIC295x-02/-03/-05/-06, IL = 100mA, Note 12 Dropout Voltage Ground Current Dropout Ground Current February 2010 Min 250 300 mV MIC295x-02/-03/-05/-06, IL = 150mA, Note 12 300 450 600 mV mV MIC2951-3.3 (±1%), IL = 100µA, Note 12 40 80 150 mV mV MIC2951-3.3 (±1%), IL = 100mA, Note 12 250 350 mV MIC2951-3.3 (±1%), IL = 150mA, Note 12 320 450 600 mV mV MIC2951-4.8 (±1%), IL = 100µA, Note 12 40 80 140 mV mV MIC2951-4.8 (±1%), IL = 100mA, Note 12 250 300 mV MIC2951-4.8 (±1%), IL = 150mA, Note 12 320 450 600 mV mV MIC295x-02/-03/-05/-06, IL = 100µA 120 180 300 µA µA MIC295x-02/-03/-05/-06, IL = 100mA 1.7 2.5 3.5 mA mA MIC295x-02/-03/-05/-06, IL = 150mA 4 6 8 mA mA MIC2951-3.3 (±1%), IL = 100µA 100 180 300 µA µA MIC2951-3.3 (±1%), IL = 100mA 1.7 2.5 mA MIC2951-3.3 (±1%), IL = 150mA 4 6 10 mA mA MIC2951-4.8 (±1%), IL = 100µA 120 180 300 µA µA MIC2951-4.8 (±1%), IL = 100mA 1.7 2.5 3.5 mA mA MIC2951-4.8 (±1%), IL = 150mA 4 6 8 mA mA MIC295x-02/-03/-05/-06, VIN = 4.5V, IL = 100µA 280 350 400 µA µA MIC2951-3.3 (±1%), VIN = 3.0V, IL = 100µA 150 350 400 µA µA MIC2951-4.8 (±1%), VIN = 4.3V, IL = 100µA 280 350 400 µA µA 5 M9999-021610 Micrel, Inc. MIC2950/2951 Parameter Condition Typ Max Units Current Limit VOUT = 0V 300 400 450 mA mA Thermal Regulation Note 13 0.05 0.20 Output Noise 10Hz to 100kHz, CL = 1.5µF 430 µVRMS 10Hz to 100kHz, CL = 200µF 160 µVRMS 10Hz to 100kHz, CL = 3.3µF, 0.01µF bypass Feedback to Output 100 µVRMS Reference Voltage Reference Voltage Min MIC295x-02/-05 (±0.5%) 1.220 1.200 1.235 1.250 1.260 V V MIC295x-03/06 (±1%) 1.210 1.200 1.235 1.260 1.270 V V MIC2951-3.3 (±1%) 1.210 1.200 1.235 1.260 1.270 V V MIC2951-4.8 (±1%) 1.210 1.200 1.235 1.260 1.270 V V MIC295x-02/-05 (±0.5%), Note 14 1.190 1.270 V MIC295x-03/-06 (±1%), Note 14 1.185 1.285 V MIC2951-3.3 (±1%), Note 14 1.185 1.285 V MIC2951-4.8 (±1%), Note 14 1.185 1.285 V 40 60 nA nA Feedback Bias Current Reference Voltage Temperature Coefficient %/W 20 MIC295x-02/05 (±0.5%), Note 9 20 ppm/°C MIC295x-03/06 (±1%), Note 9 50 ppm/°C MIC2951-3.3 (±1%), Note 9 50 ppm/°C 50 ppm/°C 0.1 nA/°C MIC2951-4.8 (±1%), Note 9 Feedback Bias Current Temperature Coefficient Error Comparator (Flag) Output Leakage Current VOH = 30V 0.01 1.00 2.00 µA µA Error Comparator (Flag) Output Low Voltage (Flag) VIN = 4.5V, IOL = 200µA 150 250 400 mV mV Error Comparator (Flag) Upper Threshold Voltage Note 15 Error Comparator Lower Threshold Voltage Note 15 75 Error Comparator Hysteresis Note 15 15 February 2010 40 25 6 mV mV 60 95 140 mV mV mV M9999-021610 Micrel, Inc. MIC2950/2951 Parameter Condition Shutdown Input Logic Voltage MIC295x-02/-05 (±0.5%) Low High Min Units 0.7 V V V 0.7 V V V 0.7 V V V 0.7 V V V 2.0 1.3 2.0 MIC2951-3.3 (±1%) Low High 1.3 2.0 MIC2951-4.8 (±1%) Low High Regulator Output Current in Shutdown Max 1.3 MIC295x-03/-06 (±1%) Low High Shutdown Input Current Typ 1.3 2.0 VSHUTDOWN = 2.4V 30 50 100 µA µA VSHUTDOWN = 30V 450 600 750 µA µA 3 10 20 µA µA Note 7 Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions are recommended. 4. The junction-to-ambient thermal resistance of the TO-92 package is 180°C/W with 0.4” leads and 160°C/W with 0.25” leads to a PC board. The thermal resistance of the 8-pin DIP package is 105°C/W junction-to-ambient when soldered directly to a PC board. Junction-to-ambient thermal resistance for the SOIC (M) package is 160°C/W. Junction-to-ambient thermal resistance for the MM8™ (MM) is 250°C/W. 5. The maximum positive supply voltage of 60V must be of limited duration (≤100ms) and duty cycle (≤1%). The maximum continuous supply voltage is 30V. 6. When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped to ground. 7. VSHDN ≥ 2V, VIN ≤ 30V, VOUT = 0, with the FB pin connected to TAP. 8. Additional conditions for 8-pin devices are VFB = 5V, TAP and OUT connected to SNS (VOUT = 5V) and VSHDN ≤ 0.8V. 9. Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. 10. 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 in the specification for thermal regulation. 11. Line regulation for the MIC2951 is tested at 150°C for IL = 1mA. For IL = 100µA and TJ = 125°C, line regulation is guaranteed by design to 0.2%. See Typical Performance Characteristics for line regulation versus temperature and load current. 12. Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account. 13. Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 50mA load pulse at VIN = 30V (1.25W pulse) for t = 10ms. 14. VREF ≤ VOUT ≤ (VIN – 1 V), 2.3V ≤ VIN ≤ 30V, 100µA < IL ≤ 150mA, TJ ≤ TJMAX. 15. Comparator thresholds are expressed in terms of a voltage differential at the FB terminal below the nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT /VREF = (R1 + R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x 5V/1.235V = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed. 16. Specification for packaged product only. February 2010 7 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Characteristics February 2010 8 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Characteristics (continued) February 2010 9 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Characteristics (continued) February 2010 10 M9999-021610 Micrel, Inc. MIC2950/2951 Application Information Error Detection Comparator Output A logic low output will be produced by the comparator whenever the MIC2951 output falls out of regulation by more than approximately 5%. This figure is the comparator’s built-in offset of about 60mV divided by the 1.235V reference voltage. (Refer to the block diagram on Page 1). This trip level remains “5% below normal” regardless of the programmed output voltage of the MIC2951. For example, the error flag trip level is typically 4.75V for a 5V output or 11.4V for a 12V output. The out of regulation condition may be due either to low input voltage, current limiting, thermal limiting, or overvolt-age on input (over ≅ 40V). Figure 1 is a timing diagram depicting the /ERROR signal and the regulated output voltage as the MIC2951 input is ramped up and down. The /ERROR signal becomes valid (low) at about 1.3V input. It goes high at about 5V input (the input voltage at which VOUT = 4.75—for 5.0V applications). Since the MIC2951’s dropout voltage is load-dependent (see curve in Typical Performance Characteristics), the input voltage trip point (about 5V) will vary with the load current. The output voltage trip point does not vary with load. The error comparator has an open-collector output which requires an external pull-up resistor. Depending on system requirements, this resistor may be returned to the output or some other supply voltage. In determining a value for this resistor, note that while the output is rated to sink 200µA, this sink current adds to battery drain in a low battery condition. Suggested values range from 100k to 1MΩ. The resistor is not required if this output is unused. Automotive Applications The MIC2950/2951 are ideally suited for automotive applications for a variety of reasons. They will operate over a wide range of input voltages, have very low dropout voltages (40mV at light loads), and very low quiescent currents. These features are necessary for use in battery powered systems, such as automobiles. They are also “bulletproof” devices; with the ability to survive both reverse battery (negative transients up to 20V below ground), and load dump (positive transients up to 60V) conditions. A wide operating temperature range with low temperature coefficients is yet another reason to use these versatile regulators in automotive designs External Capacitors A 1.5µF (or greater) capacitor is required between the MIC2950/MIC2951 output and ground to prevent oscillations due to instability. Most types of tantalum or aluminum elec-trolytics will be adequate; film types will work, but are costly and therefore not recommended. Many aluminum electrolytics have electrolytes that freeze at about –30°C, so solid tantalums are recomm-ended for operation below –25°C. The important parameters of the capacitor are an effective series resistance of about 5Ω or less and a resonant frequency above 500kHz. The value of this capacitor may be increased without limit. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.5µF for current below 10mA or 0.15µF for currents below 1 mA. Using the 8-pin versions at voltages below 5V runs the error amplifier at lower gains so that more output capacitance is needed. For the worst-case situation of a 150mA load at 1.23V output (Output shorted to Feedback) a 5µF (or greater) capacitor should be used. The MIC2950 will remain stable and in regulation with no load in addition to the internal voltage divider, unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. When setting the output voltage of the MIC2951 version with external resistors, a minimum load of 1µA is recomm-ended. A 0.1µF capacitor should be placed from the MIC2950/ MIC2951 input to ground if there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the input. Stray capacitance to the MIC2951 Feedback terminal (pin 7) can cause instability. This may especially be a problem when using high value external resistors to set the output voltage. Adding a 100pF capacitor between Output and Feedback and increasing the output capacitor to at least 3.3µF will remedy this. February 2010 Programming the Output Voltage (MIC2951) The MIC2951 may be pin-strapped for 5V (or 3.3V or 4.85V) using its internal voltage divider by tying Pin 1 (output) to Pin 2 (sense) and Pin 7 (feedback) to Pin 6 (5V Tap). Alternatively, it may be programmed for any output voltage between its 1.235V reference and its 30V maximum rating. An external pair of resistors is required, as shown in Figure 2. The complete equation for the output voltage is: ⎧ R ⎫ VOUT = VREF × ⎨1 + 1 ⎬ + IFB R 1 ⎩ R2 ⎭ where VREF is the nominal 1.235 reference voltage and IFB is the feedback pin bias current, nominally –20nA. The minimum recommended load current of 1µA forces an upper limit of 1.2MΩ on the value of R2, if the regulator must work with no load (a condition often found in CMOS in standby), IFB will produce a 2% typical error in VOUT which may be eliminated at room temperature by trimming R1. For better accuracy, choosing R2 = 100k reduces this error to 0.17% while increasing the resistor program current to 12µA. 11 M9999-021610 Micrel, Inc. MIC2950/2951 Reducing Output Noise In some applications it may be advantageous to reduce the AC noise present at the output. One method is to reduce the regulator bandwidth by increasing the size of the output capacitor. This is the only method by which noise can be reduced on the 3 lead MIC2950 and is relatively inefficient, as increasing the capacitor from 1µF to 220µF only decreases the noise from 430µV to 160µV rms for a 100kHz bandwidth at 5V output. Noise can be reduced fourfold by a bypass capacitor across R1, since it reduces the high frequency gain from 4 to unity. Pick: C BYPASS ≅ 1 2πR 1 • 200Hz Figure 1. ERROR Output Timing or about 0.01µF. When doing this, the output capacitor must be increased to 3.3µF to maintain stability. These changes reduce the output noise from 430µV to 100µVrms for a100kHz bandwidth at 5V output. With the bypass capacitor added, noise no longer scales with output voltage so that improvements are more dramatic at higher output voltages. Figure 2. Adjustable Regulator February 2010 12 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Applications 5V Regulator with 2.5V Sleep Function Wide Input Voltage Range Current Limiter Low Drift Current Source 5V Current Limiter February 2010 13 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Applications Regulator with Early Warning and Auxiliary Output February 2010 14 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Applications Latch Off When Error Flag Occurs Open Circuit Detector for 4mA to 20mA Current Loop Regulator with State-of-Charge Indicator February 2010 15 M9999-021610 Micrel, Inc. MIC2950/2951 Typical Applications Low Battery Disconnect System Over Temperature Protection Circuit February 2010 16 M9999-021610 Micrel, Inc. MIC2950/2951 Schematic Diagram February 2010 17 M9999-021610 Micrel, Inc. MIC2950/2951 Package Information 8-Pin SOIC (M) PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.255 (6.48) 0.245 (6.22) 0.135 (3.43) 0.125 (3.18) 0.300 (7.62) 0.013 (0.330) 0.010 (0.254) 0.018 (0.57) 0.100 (2.54) 0.130 (3.30) 0.0375 (0.952) 0.380 (9.65) 0.320 (8.13) 8-Pin Plastic DIP (N) February 2010 18 M9999-021610 Micrel, Inc. MIC2950/2951 8-Pin MSOP (MM) February 2010 19 M9999-021610 Micrel, Inc. MIC2950/2951 0.090 (2.286) Radius, t yp. 2 3 1 0.145 (3.683) 0.135 (3.429) 0.055 (1.397) 0.045 (1.143) 10° typ. BOTTOM VIEW 0.085 (2.159) Diam. 0.185 (4.699) 0.175 (4.445) 5° t yp. 0.185 (4.699) 0.175 (4.445) 0.090 (2.286) typ. 5° typ. Seat ing Plane 0.025 (0.635) Max Uncont rolled Lead Diamet er 0.500 (12.70) Min. 0.016 (0.406) 0.014 (0.356) 0.0155 (0.3937) 0.0145 (0.3683) 0.055 (1.397) 0.045 (1.143) 0.105 (2.667) 0.095 (2.413) TO-92 (Z) 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. © 1999 Micrel, Incorporated. February 2010 20 M9999-021610