MIC2214 Micrel, Inc. MIC2214 Portable Power Management IC General Description Features The MIC2214 is a dual µCap low dropout regulator with an open-drain driver and power-on reset circuit. The first regulator is capable of sourcing 150mA, while the second regulator can source up to 300mA and includes a power-on reset function. The open-drain output is capable of sinking 150mA for LED backlighting applications. Ideal for battery operated applications, the MIC2214 offers 1% accuracy, extremely low dropout voltage (80mV @ 100mA), and extremely low ground current, only 48µA total. Equipped with a TTL-logic-compatible enable pin, the MIC2214 can be put into a zero-off-mode current state, drawing no current when disabled. The MIC2214 is a µCap design, operating with very small ceramic output capacitors for stability, reducing required board space and component cost. The MIC2214 is available in fixed output voltages in the 10-pin 3mm × 3mm MLF™ leadless package and is also available with adjustable output voltages in the 4mm × 4mm 16-pin MLF™ package. • Input voltage range: 2.25V to 5.5V • Stable with ceramic output capacitor • 2 LDO outputs • Output 1 – 150mA output current • Output 2 – 300mA output current • 1 Open-drain driver • Power-on reset function with adjustable delay time • Low dropout voltage of 80mV @ 100mA • Ultra-low quiescent current of 48µA • High output accuracy: • +1.0% initial accuracy • +2.0% over temperature • Thermal shutdown protection • Current limit protection • Tiny 3mm × 3mm MLF™-10 package Applications • Cellular/PCS phones • Wireless modems • PDAs Typical Application 100kΩ MIC2214-xxBML VIN 1µF OFF ON 0.01µF OFF ON VIN VOUT1 VANALOG EN VOUT2 VDIGITAL VCORE CBYP POR SW DRV SET CDELAY /RST Baseband Processor 1µF Ceramic Keyboard Backlighting LED MEMORY GND MIC2214 Typical Cellphone Application MicroLeadFrame and MLF are trademarks of Amkor Technology. Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com October 2005 1 M9999-101705 MIC2214 Micrel, Inc. Ordering Information Part Number Full Number Manufacturing Pb-Free MIC2214-1.5/2.8BML MIC2214-FMBML MIC2214-FMYML MIC2214-1.6/2.8BML MIC2214-WMBML MIC2214-WMYML MIC2214-1.6/3.0BML MIC2214-WPBML MIC2214-WPYML MIC2214-1.6/3.3BML MIC2214-WSBML MIC2214-WSYML MIC2214-1.8/2.6BML MIC2214-GKBML MIC2214-GKYML MIC2214-1.8/2.7BML MIC2214-GLBML MIC2214-GLYML MIC2214-1.8/2.8BML MIC2214-GMBML MIC2214-GMYML MIC2214-1.8/2.9BML MIC2214-GOBML MIC2214-GOYML MIC2214-1.8/3.0BML MIC2214-GPBML MIC2214-GPYML MIC2214-1.8/3.3BML MIC2214-GSBML MIC2214-GSYML MIC2214-1.85/2.65BML MIC2214-DIBML MIC2214-DIYML MIC2214-1.85/2.6BML MIC2214-DKBML MIC2214-DKYML MIC2214-1.85/2.7BML MIC2214-DLBML MIC2214-DLYML MIC2214-1.85/2.85BML MIC2214-DNBML MIC2214-DNYML MIC2214-1.85/2.9BML MIC2214-DOBML MIC2214-DOYML MIC2214-2.5/1.8BML MIC2214-JGBML MIC2214-JGYML MIC2214-2.5/2.8BML MIC2214-JMBML MIC2214-JMYML MIC2214-2.5/3.0BML MIC2214-JPBML MIC2214-JPYML MIC2214-2.5/3.1BML MIC2214-JQBML MIC2214-JQYML MIC2214-2.6/2.6BML MIC2214-KKBML MIC2214-KKYML MIC2214-2.6/2.85BML MIC2214-KNBML MIC2214-KNYML MIC2214-2.6/2.8BML MIC2214-KMBML MIC2214-KMYML MIC2214-2.6/3.0BML MIC2214-KPBML MIC2214-KPYML MIC2214-2.7/2.8BML MIC2214-LMBML MIC2214-LMYML MIC2214-2.7/3.0BML MIC2214-LPBML MIC2214-LPYML MIC2214-2.8/2.8BML MIC2214-MMBML MIC2214-MMYML MIC2214-2.8/3.0BML MIC2214-MPBML MIC2214-MPYML MIC2214-2.85/2.85BML MIC2214-NNBML MIC2214-NNYML MIC2214-3.0/1.6BML MIC2214-PWBML MIC2214-PWYML MIC2214-3.0/2.85BML MIC2214-PNBML MIC2214-PNYML MIC2214-3.0/2.8BML MIC2214-PMBML MIC2214-PMYML MIC2214-3.0/3.3BML MIC2214-PSBML MIC2214-PSYML MIC2214-3.3/1.6BML MIC2214-SWBML MIC2214-SWYML MIC2214-3.3/1.8BML MIC2214-SGBML MIC2214-SGYML MIC2214-3.3/2.8BML MIC2214-SMBML MIC2214-SMYML MIC2214-Adj/AdjBML MIC2214-AABML MIC2214-AAYML * Contact factory regarding availability for voltages not listed Voltage Adj 1.5 1.6 1.8 1.85 1.9 2.0 2.1 2.5 2.6 2.65 Code A F W G D Y H E J K I Voltage 2.7 2.8 2.850 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Voltage* (Vo1/Vo2) 1.5V/2.8V 1.6V/2.8V 1.6V/3.0V 1.6V/3.3V 1.8V/2.6V 1.8V/2.7V 1.8V/2.8V 1.8V/2.9V 1.8V/3.0V 1.8V/3.3V 1.85V/2.65V 1.85V/2.6V 1.85V/2.7V 1.85V/2.85V 1.85V/2.9V 2.5V/1.8V 2.5V/2.8V 2.5V/3.0V 2.5V/3.1V 2.6V/2.6V 2.6V/2.85V 2.6V/2.8V 2.6V/3.0V 2.7V/2.8V 2.7V/3.0V 2.8V/2.8V 2.8V/3.0V 2.85V/2.85V 3.0V/1.6V 3.0V/2.85V 3.0V/2.8V 3.0V/3.3V 3.3V/1.6V 3.3V/1.8V 3.3V/2.8V Adj/Adj Junction Temp. Range –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C –40°C to +125°C Package 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 10-Pin 3x3 MLF™ 16-Pin 4x4 MLF™ Code L M N O P Q R S T U V Table 1. Voltage Codes M9999-101705 2 October 2005 MIC2214 Micrel, Inc. Pin Configuration 16 VIN 1 10 VOUT1 EN 2 9 VOUT2 BYP 3 8 POR SW 4 7 DRV SET 5 6 GND 15 14 13 EN1 1 12 POR EN2 2 11 DRV BYP 3 10 ADJ ADJ1 4 9 NGND 5 10-Pin 3mm × 3mm MLF™ (ML) (Top View) 6 7 8 16-Pin 4mm × 4mm MLF™ (ML) Pin Description Pin Number MLF-10 (3x3) Pin Number MLF-16 (4x4) Pin Name Pin Function 1 15, 16 VIN Supply Input: (VIN1 and VIN2 are internally tied together) 2 – EN Enable Input: Enables both regulator outputs. Active High. High = on, low = off. Do not leave floating. – 1 EN1 Enable Input to Regulator 1: Enables regulator 1 output. Active high input. High = on, low = off. Do not leave floating. – 2 EN2 Enable Input to Regulator 2: Enables regulator 2 output. Active high input. High = on, low = off. Do not leave floating. 3 3 CBYP 4 5 SW – 4 ADJ1 Adjust Input (Regulator 1): Connect feedback resistors to program the output voltage for the regulator. 5 6 SET Delay Set Input: Connect external capacitor to GND to set the internal delay for the POR output. When left open, there is no delay. This pin cannot be grounded. 6 7,8 GND Ground: Connect externally to exposed pad. – 9 NGND Ground for the open-drain driver. Tied to the source of the NMOSFET. Tied to GND internally. – 10 ADJ2 Adjust Input (Regulator 2): Connect feedback resistors to program the output voltage for the regulator. 7 11 DRV Open-Drain Output: Capable of sinking 150mA. 8 12 POR Power-On Reset Output: Open-drain output. Active low indicates an output undervoltage condition on regulator 2. Reference Bypass: Connect external 0.01µF to GND to reduce output noise. May be left open. Active high signal drives open-drain N-Channel MOSFET. 9 13 VOUT2 Output of Regulator 2: 300mA output current 10 14 VOUT1 Output of Regulator 1: 150mA output current EP EP GND October 2005 Ground: Internally connected to the exposed pad. Connect externally to ground pin. 3 M9999-101705 MIC2214 Micrel, Inc. Absolute Maximum Rating (Note 1) Operating Ratings (Note 2) Supply Input Voltage (VIN) ......................................0V to 7V Enable Input Voltage (VEN) ....................................0V to 7V Power Dissipation (PD) ................ Internally Limited, Note 3 Junction Temperature ............................... –40°C to +125°C Storage Temperature (TS) .......................... –65°C to 150°C Open-Drain Output (DRV) ........................................ 250mA Lead Temperature (soldering, 5 sec.) ........................ 260°C Supply Input Voltage (VIN) ..............................2.25V to 5.5V Enable Input Voltage (VEN) ................................... 0V to Vin Junction Temperature (TJ) ........................ –40°C to +125°C Package Thermal Resistance MLF™-10 (θJA) 1" square 2 oz. copper ............... 60°C/W Electrical Characteristics (Note 4) VIN = VOUT +1.0V for higher output of the regulator pair; COUT = 1.0µF, IOUT = 100µA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted. Parameter Conditions Min Output Voltage Accuracy Variation from nominal VOUT –1.0 –2.0 Output Voltage Temp. Coefficient VIN = VOUT +1V to 5.5V Load Regulation IOUT = 100µA to 150mA (Regulator 1 and 2) Ground Pin Current Ground Pin Current in Shutdown Ripple Rejection Current Limit Output Voltage Noise Max Units +1.0 +2.0 % % 40 Line Regulation; Note 5 Dropout Voltage; Note 6 Typ –0.3 –0.6 IOUT = 100µA to 300mA (Regulator 2) ppm/C 0.02 0.3 0.6 %/V 0.2 1.0 % 1.5 % IOUT = 150mA (Regulator 1 and 2) 120 190 250 mV mV IOUT = 300mA (Regulator 2) 240 340 420 mV IOUT1 = IOUT2 = 0µA 48 65 80 µA µA IOUT1 = 150mA & IOUT2 = 300mA 60 f = 1kHz; COUT = 1.0µF ceramic; CBYP = 10nF f = 20kHz; COUT = 1.0µF ceramic; CBYP = 10nF VOUT = 0V (Regulator 1) VOUT = 0V (Regulator 2) µA 2.0 VEN ≤ 0.4V µA 60 dB 40 dB 150 280 460 mA 300 450 700 mA COUT =1µF, CBYP =0.01µF, 10Hz to 100kHz 30 µVrms Enable Input Enable Input Voltage Enable Input Current Logic Low (Regulator Shutdown) 0.6 V Logic High (Regulator Enabled) 1.8 VIL < 0.6V (Regulator Shutdown) –1 0.01 +1 µA VIH > 1.8V (Regulator Enabled) –1 0.01 +1 µA Low Threshold, % of nominal VOUT2 (Flag ON) 90 V POR Output VTH VOL IPOR M9999-101705 High Threshold, % of nominal VOUT2 (Flag OFF) POR output logic low voltage; IL = 250µA Flag leakage current, flag OFF 4 % 96 –1 % 0.02 0.1 V 0.01 +1 µA October 2005 MIC2214 Parameter Micrel, Inc. Conditions Min Typ Max Units 0.2 0.5 0.6 V 0.01 +1 µA DRV Output Voltage Low IDRV = 150mA Leakage Current IDRV = 0mA, VDRV = 5.5V, SW = 0V –1 Logic High (DRV enabled) 1.8 VIL < 0.6V (DRV shutdown) –1 0.01 +1 µA –1 0.01 +1 µA 0.75 1.25 1.75 µA SW Input Voltage SW Input Current 0.6 Logic Low (DRV shutdown) VIH > 1.8V (DRV enabled) V V SET Input SET Pin Current Source SET Pin Threshold Voltage VSET = 0V POR = High 1.25 V Note 1. Exceeding maximum rating may damage the device. Note 2. The device is not guaranteed to work outside its operating rating. Note 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. Note 4. Specification for packaged product only. Note 5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage. Note 6. 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 2.25V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.25V. Minimum input operating voltage is 2.25V. October 2005 5 M9999-101705 MIC2214 Micrel, Inc. 80 CB YP = 10nF CB YP = 1nF Spectral Noise Density Output 2 10E-6 CB YP = 1nF VIN = VOUT + 1 IOUT = 300mA COUT = 1µF 0 0.01 1000 3 100µA Load 0.1 1 10 100 FREQUENCY (kHz) 1000 100E-9 Dropout Characteristics Output 1 DROPOUT VOLTAGE (mV) 150 0 0 Dropout Voltage Output 1 150mA load 100 50 350 300 30 20 10 0 0 20 40 60 80 100 120 140 OUTPUT 1 LOAD CURRENT (mA) M9999-101705 300mA 1 0 0 Dropout Voltage Output 2 300mA load 100 50 60 Ground Current vs. Output 2 Current 50 40 30 20 10 0 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA) 6 50 1 2 3 4 5 SUPPLY VOLTAGE (V) Ground Current vs. Supply Voltage Output 1 and 2 with 100µA load 40 30 20 10 0 0 0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) 60 100µA 1.5 1 2 3 4 5 SUPPLY VOLTAGE (V) 150 GROUND CURRENT (µA) GROUND CURRENT (µA) 40 2 0.5 200 Ground Current vs. Output 1 Current 50 150mA 250 0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) 60 100µA 1 10k 100k 1M 100 1k FREQUENCY (Hz) 100 1k 10k 100k 1M FREQUENCY (Hz) Dropout Characteristics Output 2 3 GROUND CURRENT (µA) CB YP = 0.01µF CB YP = 0.01µF 2.5 0.5 IN 10E-9 10 1.5 COUT = 1µF CIN = 1µF 10E-9 10 GROUND PIN CURRENT (µA) COUT = 1µF C = 1µF 2 100µA Load 1E-6 OUTPUT (V) 100E-9 OUTPUT (V) 1E-6 Spectral Noise Density Output 1 10E-6 2.5 DROPOUT VOLTAGE (mV) SPECTRAL NOISE DENSITY (V/root Hz) 0.1 1 10 100 FREQUENCY (kHz) CB YP = 10nF 40 20 VIN = VOUT + 1 IOUT = 150mA COUT = 1µF 0 0.01 CB YP = 100nF 60 PSRR (dB) PSRR (dB) 40 20 80 CB YP = 100nF 60 PSRR Output 2 60 1 2 3 4 5 SUPPLY VOLTAGE (V) Ground Pin Current 1mA 50 40 6 0µA 100µA 30 20 10 0 Load on both outputs -40 -20 0 20 40 60 80 100 120 140 160 PSRR Output 1 SPECTRAL NOISE DENSITY (V/root Hz) Typical Characteristics TEMPERATURE (°C) October 2005 MIC2214 Micrel, Inc. Typical Characteristics (cont.) 2.600 2.595 2.590 2.585 2.580 0 25 50 75 100 125 150 OUTPUT 1 LOAD CURRENT (mA) Output Voltage 2 vs. Temperature 100µA load 1.20 SWITCH THRESHOLD (V) OUTPUT VOLTAGE (V) 2.95 2.90 2.870 2.865 2.860 2.855 2.850 2.845 2.840 2.835 2.830 2.825 2.820 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA) 2.85 2.80 2.75 2.70 2.65 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) 3.15 OUTPUT VOLTAGE (V) 2.605 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 2.610 Output Voltage vs. Load Current Switch Threshold vs. Supply Voltage Drive Current = 1mA 1.00 0.80 0.60 0.40 0.20 0.00 2.25 2.75 3.25 3.75 4.25 4.75 5.25 SUPPLY VOLTAGE (V) 3.10 Output Voltage 1 vs. Temperature 100µA load 3.05 3.00 2.95 2.90 2.85 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) 1.60 ENABLE THRESHOLD (V) Output Voltage vs. Load Current Enable Voltage Threshold vs. Supply Voltage 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 2.25 2.75 3.25 3.75 4.25 4.75 5.25 SUPPLY VOLTAGE (V) POR Delay 10M 1M TIME (µs) 100k 10k 1k 100 CIN = 1µF COUT = 1µF ILOAD = 100µA 10 1 1 10 100 1k 10k 100k 1M POR SETTING CAP (pF) October 2005 7 M9999-101705 MIC2214 Micrel, Inc. Functional Characteristics Power-On Reset Characteristics VOUT2 (1V/div) POR VOUT1 (1V/div) (2V/div) VOUT1 (2V/div) VEN (2V/div) VEN (2V/div) Enable Characteristics VOUT2 (1V/div) CIN = 1µF COUT = 1µF Ceramic CBYP = 0.01µF VIN = 5V CIN = 1µF COUT = 1µF Ceramic CSET = 0.01µF CBYP = 0.01µF VIN = 5V Time (100µs/div) Time (2ms/div) LoadTransient Response (LDO 1) LoadTransient Response (LDO 2) 300mA VOUT2 IOUT2 (100mV/div) (200mA/div) CIN = 1µF COUT = 1µF CBYP = 0.01µF VIN = VOUT +1V VOUT1 (100mV/div) VOUT2 (50mV/div) VOUT1 IOUT1 (50mV/div) (100mA/div) 150mA 100µA Time (4µs/div) M9999-101705 100µA CIN = 1µF COUT = 1µF CBYP = 0.01µF VIN = VOUT +1V Time (4µs/div) 8 October 2005 MIC2214 Micrel, Inc. Functional Diagram VIN OUT1 LDO1 EN LDO2 OUT2 POR & Delay POR SET CBYP DRV Reference SW SW Logic GND NGND MIC2214 Fixed Voltage Block Diagram VIN1 OUT1 LDO1 EN1 ADJ1 VIN2 EN2 SET CBYP OUT2 LDO2 ADJ2 POR & Delay Quickstart� Reference POR DRV SW SW Logic GND NGND MIC2214 Adjustable Voltage Block Diagram Functional Description Power-On Reset (POR) The power-on reset output is an open-drain N-Channel device, requiring a pull-up resistor to either the input voltage or output voltage for proper voltage levels. The POR output has a delay time that is programmable with a capacitor from the SET pin to ground. The delay time can be programmed to be as long as 1 second. The SET pin is a current source output that charges a capacitor that sets the delay time for the power-on reset output. The current source is a 1µA current source that charges a capacitor up from 0V. When the capacitor reaches 1.25V, the output of the POR is allowed to go high. Open-Drain Driver (DRV) The drive (DRV) pin is an open-drain output capable of sinking 150mA of current. This output is controlled by a logic level input, the switch (SW) pin. The switch pin is an active high input and cannot be left floating. The MIC2214 is a high performance, low quiescent current power management IC consisting of two µCap low dropout regulators, a power-on reset (POR) circuit and an open-drain driver. The first regulator is capable of sourcing 150mA at output voltages from 1.25V to 5V. The second regulator is capable of sourcing 300mA of current at output voltages from 1.25V to 5V. The second regulator has a POR circuit that monitors its output voltage and indicates when the output voltage is within 5% of nominal. The POR offers a delay time that is externally programmable with a single capacitor to ground. An open-drain driver completes the power management chipset, offering the capability of driving LEDs for keypad backlighting in applications such as cellphones. Enable The enable input allows for logic control of both output voltages with one enable input. The enable input is active high, requiring 1.8V for guaranteed operation. The enable input is CMOS logic and cannot by left floating. October 2005 9 M9999-101705 MIC2214 Micrel, Inc. Input Capacitor Good bypassing is recommended from input to ground to help improve AC performance. A 1µF capacitor or greater located close to the IC is recommended. Bypass Capacitor The internal reference voltage of the MIC2214 can be bypassed with a capacitor to ground to reduce output noise and increase power supply rejection (PSRR). A quick-start feature allows for quick turn-on of the output voltage regardless of the size of the capacitor. The recommended nominal bypass capacitor is 0.01µF, but it can be increased without limit. Output Capacitor Each regulator output requires a 1µF ceramic output capacitor for stability. The output capacitor value can be increased to improve transient response, but performance has been optimized for a 1µF ceramic type output capacitor. 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. M9999-101705 Adjustable Regulator Design R1 VOUT1 VOUT2 ADJ1 R2 R1 ADJ2 GND R2 MIC2214 Adjustable Regulator Design The MIC2214 allows the programming of the output voltages 1 and 2 anywhere between 1.25V and 5.5V, the maximum operating rating of the part. Two resistors are required for each output. Appropriate resistor values are required to prevent the low quiescent current performance being compromised. Resistor values recommended are between 100kΩ and 500kΩ. The resistor values are calculated by: VOUT R1 = R2 –1 1.250 where VOUT is the desired output voltage. Calculate separately for each output. 10 October 2005 MIC2214 Micrel, Inc. Package Information 10-Lead MLF™ (ML) 16-Lead MLF™ (ML) 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. © 2003 Micrel, Incorporated. October 2005 11 M9999-101705