MIC5159 Micrel MIC5159 Programmable Current Limit µCap LDO Regulator Controller General Description Features Micrel’s MIC5159 is a precision-voltage regulator controller. Used with an external P-Channel MOSFET, the MIC5159 forms a two-chip low-dropout regulator capable of driving a wide range of output currents. The MIC5159 operates from an input of 1.65V to 5.5V. The low input voltage allows the MIC5159 to operate off of high power 1.8V rails to generate lower voltages such as 1.5V. Features of the MIC5159 include enable input and currentlimit protection. As a µCap design, the MIC5159 is stable with ceramic output capacitors. The MIC5159 is packaged in the IttyBitty® SOT-23-6, and is offered in fixed and adjustable output voltages. Junction temperature range of the MIC5159 is from –40°C to +125°C. • • • • • • • • • • • • Fast transient response Input voltage range: VIN 1.65V to 5.5V ±1.0% initial output tolerance Fixed 1.8V or adjustable output voltage down to 1.25V Stable with ceramic output capacitor Capable up to 10A Excellent line and load regulation specifications Logic-controlled shutdown Programmable current limit Current-limit protection IttyBitty® SOT-23-6 package Available temperature range: –40°C to +125°C Applications • • • • • • • Ultra-high current, ultra-low dropout voltage regulator High-efficiency linear power supplies Low-voltage distributed power Fixed telecom Multimedia and PC power supplies Battery chargers Low-voltage DSP, microprocessor and microcontroller power supplies Ordering Information Part Number Voltage Marking Junction Temp. Range Package MIC5159BM6 ADJ. LZAA –40°C to +125°C SOT-23-6 MIC5159-1.8BM6 1.8V LZ18 –40°C to +125°C SOT-23-6 MIC5159-3.0BM6 3.0V LZ30 –40°C to +125°C SOT-23-6 Other voltages available. Contact Micrel for details. Typical Application OUTPUT VOLTAGE (100mV/div.) Load Transient Response Q1ÐQ4 SUB15P01Ð52 ´ 4 VIN VOUT C1 1 3 U1 MIC5159BM6 EN GATE IN IS FB GND GND 10A R1 C1 C1 100mA OUTPUT CURRENT (5A/div.) 5 R2 GND Adjustable Output Voltage VIN = 3.3V VOUT = 2.5V COUT = 200µF TIME (20µs/div.) IttyBitty is a registered trademark of Micrel, Inc. Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com April 2004 1 M9999-041204 MIC5159 Micrel Pin Configuration ADJ 6 Pin 1 Index EN GATE 5 VO 4 6 LZAA 1 2 Pin 1 Index 3 5 4 LZxx 1 IN GND IS EN GATE 2 3 IN GND IS SOT-23-6 (M6) Adjustable Voltage Version SOT-23-6 (M6) Fixed Voltage Version Pin Description Pin Number Pin Name Pin Function 1 IN Input Voltage. 2 GND 3 IS 4 GATE 5 EN 6 ADJ. VO M9999-041204 Ground. Current Sense: IS must be tied to VIN pin if the current limit feature is not used. Gate drive of the external P-Channel MOSFET. Enable Input: Logic Level ON/OFF control. Logic high = ON; logic low = OFF. Adjustable Regulator Feedback Input: Connect to resistor voltage divider. Output Voltage: Connect to drain of P-Channel MOSFET to regulate output to proper voltage. 2 April 2004 MIC5159 Micrel Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) .................................................. +6.0V Enable Input Voltage (VEN) ........................................ +6.0V Power Dissipation (PD(max)) ................................... Note 3 Storage Temperature (TS) ....................... –65°C to +150°C Lead Temperature (soldering, 5 sec.) ....................... 260°C ESD Rating(4) ................................................................ 2kV Supply Voltage (VIN) ................................. +1.65V to +5.5V Enable Input Voltage (VEN) .............................. 0V to +5.5V Junction Temperature (TJ) ................ –40°C ≤ TJ ≤ +125°C Package Thermal Resistance SOT-23-6 (θJA) .............................................. 235°C/W Electrical Characteristics(4) TA = 25°C with VIN = VOUT + 1V; VEN = 1.2V, CIN = COUT = 10µF, ceramic, IOUT = 10mA; bold values indicate –40°C < TJ < +125°C; unless otherwise specified, Note 3 Parameter Condition Output Voltage Accuracy At 25°C Over temperature range Min Max Units –1 +1 % –2 +2 % 0.007 +0.1 %/V –0.1 Typ Output Voltage Line Regulation VIN = VOUT + 1.0V to 5.5V Output Voltage Load Regulation IL = 10mA to 1.0A 0.2 1.0 % Ground Pin Current(6) VEN ≤ 0.2V (MIC5159 OFF) 15 30 µA VEN ≥ 1.2V (MIC5159 ON) 10 20 mA 1 µA Adjust Pin Bias Current Maximum VGS (PFET fully ON); VIN = 5.0V 4.5 V (PFET fully ON); VIN = 3.3V 3.1 V (PFET fully ON); VIN = 2.5V 2.3 V Current-Limit Threshold VIN – VIS 40 Start-up Time VEN = VIN 50 65 mV 30 150 µs Enable Input Enable Input Threshold Regulator enabled 1.2 V Regulator shutdown Enable hysteresis Enable Pin Input Current 20 Independent of state 50 0.2 V 250 mV 0.01 nA 1 µA Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. PD(max) = (TJ(max) – TA) ÷ θJA, where θJA depends upon the printed circuit layout, see “Applications Information.” 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only. 6. IGND is the quiescent current. IIN = IGND + IOUT. April 2004 3 M9999-041204 MIC5159 Micrel Typical Characteristics Reference Voltage vs. Temperature REFERENCE VOLTAGE (V) 1.245 1.24 1.235 1.23 5.65 5.15 4.65 4.15 3.65 3.15 1.65 1.22 2.65 1.225 2.15 REFERENCE VOLTAGE (V) 1.25 1.24 1.239 1.238 1.237 1.236 Output Voltage vs. Load VIN = 3.3V 1.235 1.234 1.233 1.232 1.231 1.23 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) OUTPUT VOLTAGE (V) Reference Voltage vs. Input Voltage 1.24 1.239 1.238 1.237 1.236 VIN = 2.5V 1.235 1.234 1.233 1.232 1.231 1.23 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 LOAD (A) INPUT VOLTAGE (V) QUIESCENT CURRENT (mA) 5.65 5.15 4.65 4.15 3.65 3.15 2.65 2.15 1.65 QUIESCENT CURRENT (mA) ILOAD = 10mA Quiescent Current vs. Load 10 9 8 7 6 5 4 3 2 1 VIN = 3.3V 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) QUIESCENT CURRENT (mA) Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage 10 9 8 7 6 5 4 3 2 1 0 10 9 8 7 6 5 4 3 2 1 VIN = 2.5V 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 LOAD (A) Current Limit Threshold vs. Temperature Enable Threshold vs. Temperature 800 60 58 ENABLE THRESHOLD (mV) CURRENT LIMIT THRESHOLD (mV) 5.65 5.15 4.65 4.15 3.65 3.15 2.65 2.15 Current Limit Threshold vs. Input Voltage 60 58 56 54 52 50 48 46 44 42 40 1.65 CURRENT LIMIT THRESHOLD (mV) INPUT VOLTAGE (V) 56 54 52 50 48 46 44 42 40 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 700 600 500 EN on 400 300 200 EN off 100 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) INPUT VOLTAGE (V) Enable Threshold vs. Input Voltage Shutdown Current vs. Input Voltage 20 INPUT VOLTAGE (V) M9999-041204 8 6 4 5.65 5.15 0 4.65 2 4.15 5.65 5.15 4.65 4.15 3.65 3.15 1.65 0 2.65 100 85°C 10 3.65 200 12 3.15 300 25°C 14 2.65 EN off 400 16 2.15 500 -40°C 18 1.65 SHUTDOWN CURRENT (µA) EN on 600 2.15 ENABLE THRESHOLD (mV) 700 INPUT VOLTAGE (V) 4 April 2004 MIC5159 Micrel Functional Characteristics Enable Characteristics OUTPUT VOLTAGE (100mV/div.) OUTPUT VOLTAGE (100mV/div.) Load Transient Response OUTPUT CURRENT (1A/div.) 2A ENABLE VOLTAGE (1V/div.) 10mA VIN = 1.8V VOUT = 1.5V COUT = 100µF TIME (20µs/div.) April 2004 VIN = 3.3V VOUT = 1.8V TIME (20µs/div.) 5 M9999-041204 MIC5159 Micrel Functional Diagram VIN RS VOUT IS GATE Buffer ISNS Amplifier Error Amplifier Σ VOUT IN VREF VREF Enable EN GND Block Diagram — Fixed Output Voltages VIN RS VOUT IS GATE R1 Buffer ADJ. ISNS Amplifier Σ Error Amplifier IN R2 VREF VREF Enable EN Block Diagram — Adjustable Output Voltages M9999-041204 6 April 2004 MIC5159 Micrel According to the above calculation, the minimum RDS(ON) is 130mΩ for a 2.5V to 1.8V LDO with 5A of output current. For this design, the RDS(ON) for the FETs should maintain better than 130mΩ over the required temperature, current, and voltage conditions. Placing two or more P-Channel FETs in parallel can reduce the total RDS(ON) of the regulator. This also aids thermal dissipation by sharing the current and heat between the multiple FETs. Thermal Considerations Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Since the MIC5159 offers no thermal protection, thermal design requires the following application-specific parameters: • Maximum ambient temperature (TA) • Output current (IOUT) • Output voltage (VOUT) • Input voltage (VIN) First, calculate the maximum power dissipation of the regulator: PD = (VIN – VOUT) × IOUT Ground current can generally be ignored. The amount of power dissipated by ground current and input voltage is minimal. Minimum θJA for the MOSFET can be calculated using the following formula: Applications Information The MIC5159 is a high performance voltage regulator controller. When used with an external P-Channel MOSFET and a tiny ceramic output capacitor, it forms a wide variety of simple, inexpensive ultra-low-dropout voltage regulators. Current Sense Resistor Selection A current sense resistor placed between the input and the current sense pin (IS) allows for programmability of the current limit. This resistor can simply be calculated by: 50mV RSENSE = IOUT Where IOUT is the maximum output current. For example, the current sense resistor for a 2.5VIN to 1.8VOUT, 5A, linear regulator calculates as follows: 50mV RSENSE = 5A RSENSE = 10mΩ P-Channel MOSFET Selection The P-Channel MOSFET selected for use with the MIC5159 must satisfy the following requirements: • Input voltage • Gate threshold • Load current • Dropout voltage (input-to-output differential) • Thermal performance To prevent damage to the P-Channel MOSFET, the maximum input voltage (VIN(max)) must be less than its drainsource breakdown voltage (BVDS). In addition, the minimum input voltage (VIN(min)) must be greater than or equal to the gate threshold voltage (VGS) of the P-Channel MOSFET. For a given output current and dropout requirement, the ONresistance (RDS(ON)) of the P-Channel MOSFET must also be determined. The minimum RDS(ON) of the P-Channel MOSFET is calculated as follows: (T (max) − TA ) θ JA = J PD Where TJ (max) is equal to the maximum die temperature of the P-Channel. θJA = θJC + θCS + θSA Example For the same regulator, 2.5VIN to 1.8VOUT at 5A with an ambient temperature of 60°C: PD = (2.5V – 1.8V) × 5A PD = 3.5W Where VIN is the maximum VIN and IOUT is the maximum IOUT. The P-Channel MOSFET must be able to dissipate 3.5W. The minimum θJA to maintain a maximum TJ of 150°C (max.) TJ according to a typical MOSFET data sheet is as follows: (V (min) − VOUT ) RDS(ON) = IN − RSENSE IOUT (max) Where IOUT(max) is the maximum output current and RSENSE is the current sense resistor. For example, the MIC5159-1.8BM6 is used with an external MOSFET to form a 5A LDO with an input of 2.5V. Either a 2.5V or 1.8V gate threshold MOSFET can be selected. The minimum RDS(ON) is calculated as: θ JA = (150°C − 60°C) 3.5W θJA = 25.71°C/W The heatsink and MOSFET must have a combined thermal resistance to meet the above criteria. (2.5V − 1.8V) RDS(ON) = − 10mΩ 5A RDS(ON) = 130mΩ April 2004 7 M9999-041204 MIC5159 Micrel 2.0 3.3 VIN Q1,2,3 10 Si4433DYx3 W C2 ISENSE GATE VIN VOUT 47µF Figure 1. Re-Entrant Current Limit M9999-041204 0.8 0.6 1.60 1.40 1.20 1.00 0.60 0.20 0.2 Re-Entrant Current Limit 0 0.80 0.4 0.00 OUTPUT VOLTAGE (V) POWER DISSIPATION (W) W MIC5159-1.8BM6 10µF 1.0 5 4.5 4 3.5 3 2.5 2 1.5 Constant Current Limiting Re-Entrant Current Limiting 1 0.5 0 0 0.5 1 OUTPUT VOLTAGE (V) 1.5 Enable/Shutdown The MIC5159 comes 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 low off-modecurrent state. Forcing the enable pin high enables the output voltage. This part is CMOS and the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Output Capacitor The MIC5159 requires an output capacitor to maintain stability and improve transient response. Proper selection is important to ensure proper operation. The MIC5159 output capacitor selection is highly dependent upon the components and the application. With a very high gate charge (gate capacitance) MOSFET, the output requires a much larger valued ceramic capacitor for stability. As an alternative to a large valued ceramic capacitor, a smaller-valued tantalum capacitor can be used to provide stability. At higher load currents, lower RDS(ON) MOSFETs are used; these MOSFETs typically having much larger gate charge. If the application does not require ultra-low-dropout voltage, smaller values of ceramic capacitance may be used. Input Capacitor An input capacitor of 1.0µF or greater is recommended when the device is more than 4 inches away from the bulk AC supply capacitance or when the supply is a battery. Small, surface mount, ceramic capacitors can be used for bypassing the input to the regulator, further improving the integrity of the output voltage. Larger input capacitors may be required depending on the impedance of the source and the output load requirements. 1.8 VOUT 1.5A C1 1.2 Figure 3. Power Dissipation vs. Output Voltage RSENSE 25m 1.4 Figure 2. Output Voltage Characteristics Re-Entrant Current Limit W RVIN 1.6 OUTPUT CURRENT (A) RVOUT 1k Constant Current Limit 1.8 0.40 The typical thermal resistance from the junction to the case (θJC) of a TO-263 (D2 pack) is 6°C/W. Adding 0.2°C/W for case to sink thermal resistance (θCS), the heatsink must have a sink to ambient thermal resistance (θSA) of: θSA = θJA– (θJC + θCS) θSA = 25.71°C/W – (6°C/W + 0.2°C/W) θSA = 19.51°C/W According to the calculations, the heatsink must have a θSA of 19.51°C/W or better. 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. Short-Circuit Current Limit The above thermal design calculations apply to normal operation. In the case where the P-Channel MOSFET must survive extended periods of short-circuit current, another approach for thermal design must be considered. Due to the fact that the MIC5159 delivers constant current limiting, power dissipated by the MOSFET is equal to the input voltage multiplied by the maximum output current. Figure 1 shows a simple, inexpensive circuit that allows the current limiting to be re-entrant. This reduces power dissipation in current limited conditions. As the output voltage begins to drop, the differential voltage across the input and output increases. This pulls the current sense voltage lower, reducing the amount of output current to maintain 50mV across the sense resistor. This reduction in output current equates to a reduction in power dissipation in the MOSFET. Figures 2 and 3 show a comparison of linear current limiting versus the reentrant current limiting scheme implemented in Figure 1. 8 April 2004 MIC5159 Micrel Layout Considerations Input and output capacitor placement should be as close as possible to the input and output, respectively. Trace resistance between the current sense and the MOSFET source should be minimized. Trace resistance will increase dropout voltage. This is more of a factor at higher output currents. Also, a minimum amount of distance between the gate pin, on the MIC5159, and the P-Channel MOSFET gate is recommended. A long trace can create a small parasitic inductor. This, coupled to the gate capacitance of the MOSFET, can create a high frequency tank circuit. A small 50Ω resistor in series with the gate may be required to eliminate highfrequency noise. Adjustable Regulator Design The MIC5159 allows programming the output voltage anywhere between 1.235V to VIN. Two resistors are used. See Figure 4. The resistor values are calculated by: V R1= R2 × OUT − 1 1.235 Where VOUT is the desired output voltage. VIN RS VOUT Si3445 MIC5159-x.x IS GATE IN ADJ EN GND R1 COUT = 10µF ceramic R2 Figure 4. Adjustable Regulator Design April 2004 9 M9999-041204 MIC5159 Micrel 3.3VIN to 1.25VOUT Conversion Designing with MIC5159 IOUT The following section details: • Application examples of possible input/output configurations with related schematics designator. • Schematics with “Bill of Materials” recommendation, dropout performance and maximum output current for each FET combination. • Further advice on MOSFET selection. 3.3VIN to 2.5VOUT Conversion COUT MOSFET Package Schematic 0.4A 10µF Si4433DY SO-8 C 0.75A 22µF Si4433DY x2 SO-8 D 0.75A 10µF SUB15P01-52 D2PAK H 1.25A 44µF Si4433DY x3 SO-8 E 1.75A 44µF Si4433DY x4 SO-8 F 1.75A 22µF SUB15P01-52 x2 D2PAK I 2.75A 44µF SUB15P01-52 x3 D2PAK J 3.75A 44µF SUB15P01-52 x4 D2PAK K 2.5VIN to 1.8VOUT Conversion IOUT COUT MOSFET Package 1.0A 10µF Si4433DY SO-8 2.5A 22µF Si4433DY x2 SO-8 2.5A 10µF SUB15P01-52 D2PAK 3.5A 44µF Si4433DY x3 SO-8 5.0A 44µF Si4433DY x4 5.0A 22µF SUB15P01-52 x2 7.5A 44µF SUB15P01-52 x3 10.0A 44µF SUB15P01-52 x4 Schematic IOUT COUT MOSFET Package C 1.25A 10µF Si4433DY SO-8 C D 2.5A 22µF Si4433DY x2 SO-8 D H 2.5A 10µF SUB15P01-52 D2PAK H E 4.0A 44µF Si4433DY x3 SO-8 E SO-8 F 5.5A 44µF Si4433DY x4 SO-8 F D2PAK I 5.5A 22µF SUB15P01-52 x2 D2PAK I D2PAK J 8.0A 44µF SUB15P01-52 x3 D2PAK J D2PAK K 11.0A 44µF SUB15P01-52 x4 D2PAK K 3.3VIN to 1.8VOUT Conversion Schematic 2.5VIN to 1.5VOUT Conversion IOUT COUT MOSFET Package Schematic IOUT COUT MOSFET Package 0.6A 10µF Si4433DY SO-8 C 1.0A 10µF Si4433DY SO-8 C 1.25A 22µF Si4433DY x2 SO-8 D 2.0A 22µF Si4433DY x2 SO-8 D 1.25A 10µF SUB15P01-52 D2PAK H 2.0A 10µF SUB15P01-52 D2PAK H 2.0A 44µF Si4433DY x3 SO-8 E 3.0A 44µF Si4433DY x3 SO-8 E 2.5A 44µF Si4433DY x4 SO-8 F 4.0A 44µF Si4433DY x4 SO-8 F 2.5A 22µF SUB15P01-52 x2 D2PAK I 4.0A 22µF SUB15P01-52 x2 D2PAK I 3.75A 44µF SUB15P01-52 x3 D2PAK J 6.0A 44µF SUB15P01-52 x3 D2PAK J 5.0A 4 µF SUB15P01-52 x4 D2PAK K 8.0A 44µF SUB15P01-52 x4 D2PAK K 3.3VIN to 1.5VOUT Conversion 2.5VIN to 1.25VOUT Conversion IOUT COUT MOSFET Package 0.5A 10µF Si4433DY SO-8 1.0A 22µF Si4433DY x2 1.0A 10µF SUB15P01-52 1.5A 44µF Si4433DY x3 2.0A 44µF Si4433DY x4 2.0A 22µF SUB15P01-52 x2 3.0A 44µF SUB15P01-52 x3 4.25A 44µF SUB15P01-52 x4 M9999-041204 Schematic Schematic IOUT COUT MOSFET Package C 0.75A 10µF Si4433DY SO-8 SO-8 D 1.5A 22µF Si4433DY x2 SO-8 D D2PAK H 1.5A 10µF SUB15P01-52 D2PAK H SO-8 E 2.0A 44µF Si4433DY x3 SO-8 E SO-8 F 3.0A 44µF Si4433DY x4 SO-8 F D2PAK I 3.0A 22µF SUB15P01-52 x2 D2PAK I D2PAK J 4.5A 44µF SUB15P01-52 x3 D2PAK J D2PAK K 6.0A 4 µF SUB15P01-52 x4 D2PAK K 10 Schematic C April 2004 MIC5159 Micrel 1.8VIN to 1.5VOUT Conversion 1.8VIN to 1.25VOUT Conversion IOUT COUT MOSFET Package Schematic IOUT COUT MOSFET Package 2.0A 10µF Si3445DV 4.0A 22µF Si3445DV x2 Schematic TSOP-6 A 1.0A 10µF Si3445DV TSOP-6 A TSOP-6 B 1.5A 10µF Si4433DY SO-8 C 6.0A 200µF Si4403DY x2 SO-8 G 3.0A 22µF Si4433DY x2 SO-8 D 7.0A(1) 44µF SUB15P01-52 x4 D2PAK K 3.0A 10µF SUB15P01-52 D2PAK H Note: 4.5A 44µF Si4433DY x3 SO-8 E 1. For space constrained designs, a DPAK equivalent can be used in this application (SUD15P01-52). This is due to RDS(ON) limitation NOT power dissipation. 6.0A 44µF Si4433DY x4 SO-8 F 6.5A 22µF SUB15P01-52 x2 D2PAK I 9.0A 88µF SUB15P01-52 x3 D2PAK J 13.0A 88µF SUB15P01-52 x4 D2PAK K April 2004 11 M9999-041204 MIC5159 Micrel Schematic A Input/Output Combination Examples Input Output Maximum Current 1.8V 1.5V 2A 1.8V 1.25V 1A Q1 Si3445DV U1 5 C1 10 F 6.3V m 1 3 MIC5159BM6 EN GATE 4 IN FB 6 IS GND 2 R3 49.9 W VOUT R1 10k INPUT–OUTPUT VOLTAGE (V) VIN W C2 10 F 6.3V m R2* GND GND 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 0.5 1 1.5 2 2.5 OUTPUT CURRENT (A) 3 Si3445DV SOA Application Circuit Bill of Materials Item Part Number Manufacturer C1 GRM40 X7R 106 6.3 Murata(1) Description 10µF, 6.3V Ceramic MLCC, Size 0805 1 C2 C2012X5RR0J106M Murata 10µF, 6.3V Ceramic MLCC, Size 0805 1 Dale(2) Qty. R1 CRCW08051002 Vishay R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1 Si3445DV Vishay Siliconix(4) P-Channel MOSFET TSOP-6 1 Programmable Current Limit µCap LDO Regulator 1 U1 MIC5159BM6 Micrel, 10kΩ Resistor, Size 0805 Output Voltage: Output Voltage: Output Voltage: Output Voltage: Inc.(5) 1 2.5V; 9.76kΩ Resistor, Size 0805(3) 1.8V; 21.5kΩ Resistor, Size 0805(3) 1.5V; 46.4kΩ Resistor, Size 0805(3) 1.25V; 825kΩ Resistor, Size 0805(3) 1 1 1 1 Notes: 1. Murata tel: 949-916-4000 2. Vishay Dale tel: 402-563-6866 3. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 4. Vishay Siliconix tel: 402-563-6866 5. Micrel, Inc. tel: 408-944-0800 M9999-041204 12 April 2004 MIC5159 Micrel Schematic B Input/Output Combination Examples Input Output 1.8V 1.5V Maximum Current 4A Q1 Si3445DV VIN Q2 Si3445DV U1 5 C1 10 F 6.3V m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 W INPUT–OUTPUT VOLTAGE (V) VOUT R1 10k W C2 22 F 6.3V/10V m R2* GND GND 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 1 2 3 4 5 OUTPUT CURRENT (A) 6 Si3445DV x2 SOA Application Circuit Bill of Materials Item Part Number Manufacturer Description C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) Qty. 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 1 C2 GRM42-2 X5R 226K 6.3 C2012X5RR0J106M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 1 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 1 2.5V; 9.76kΩ Resistor, Size 0805(4) 1.8V; 21.5kΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale Output Voltage: Output Voltage: Output Voltage: Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 Siliconix(5) Q1, Q2 Si3445DV Vishay U1 MIC5159BM6 Micrel, Inc.(6) 1 1 1 1 1 P-Channel MOSFET TSOP-6 2 Programmable Current Limit µCap LDO Regulator 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 April 2004 13 M9999-041204 MIC5159 Micrel Schematic C Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 1A 3.3V 1.8V 0.6A 3.3V 1.5V 0.5A 3.3V 1.25V 0.4A 2.5V 1.8V 1.25A 2.5V 1.5V 1A 2.5V 1.25V 0.75A 1.8V 1.25V 1.5A Q1 Si4433DY U1 5 C1 10 F m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 W VOUT R1 10k INPUT–OUTPUT VOLTAGE (V) VIN W C2 10 F m R2* GND GND Application Circuit 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 0.5 1 1.5 OUTPUT CURRENT (A) 2 Si4433DY SOA Bill of Materials Item Part Number Manufacturer Description C1 GRM40 X7R 106 6.3 Murata(1) 10µF, 6.3V Ceramic MLCC, Size 0805 C2 C2012X5RR0J106M TDK(2) 10µF, 6.3V Ceramic MLCC, Size 0805 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 1 R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale *Output Voltage: *Output Voltage: *Output Voltage: *Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1 Si4433DY Vishay Siliconix(5) P-Channel MOSFET SO-8 1 Programmable Current Limit µCap LDO Regulator 1 U1 MIC5159BM6 Micrel, Inc.(6) Qty. 1 2.5V; 9.76kΩ Resistor, Size 0805(4) 1.8V; 21.5kΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 M9999-041204 14 April 2004 MIC5159 Micrel Schematic D Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 2.5A 3.3V 1.8V 1.25A 3.3V 1.5V 1A 3.3V 1.25V 0.75A 2.5V 1.8V 2.5A 2.5V 1.5V 2A 2.5V 1.25V 1.5A 1.8V 1.5V 2A 1.8V 1.25V 3A Q1 Si4433DY VIN Q2 Si4433DY U1 5 C1 10 F 6.3V m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 W INPUT–OUTPUT VOLTAGE (V) VOUT R1 10k W C2 22 F 6.3V/10V m R2* GND GND Application Circuit 6 5 Max. Power Dissipation at 60°C TA 4 3 2 Dropout 1 0 0 1 2 3 OUTPUT CURRENT (A) 4 Si4433DY x2 SOA Bill of Materials Item Part Number Manufacturer Description C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 C2 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale Output Voltage: Output Voltage: Output Voltage: Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 Siliconix(5) Q1, Q2 Si4433DY Vishay U1 MIC5159BM6 Micrel, Inc.(6) Qty. 1 2.3V; 9.76kΩ Resistor, Size 0805(4) 1.8V; 21.5kΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 1 P-Channel MOSFET SO-8 2 Programmable Current Limit µCap LDO Regulator 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 April 2004 15 M9999-041204 MIC5159 Micrel Schematic E Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 3.3V 1.8V 2A 3.3V 1.5V 1.5A 3.3V 1.25V 1.25A 2.5V 1.8V 4A 2.5V 1.5V 3A 2.5V 1.25V 2A 1.8V 1.25V 4.5A 3.5A Q1 Si4433DY VIN Q2 Si4433DY Q3 Si4433DY U1 5 C1 10 F 6.3V m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 INPUT–OUTPUT VOLTAGE (V) VOUT R1 10k W W C2 22 F 6.3V/10V m R2* GND GND Application Circuit 6 5 Max. Power Dissipation at 60°C TA 4 3 2 Dropout 1 0 0 1 2 3 4 5 OUTPUT CURRENT (A) 6 Si4433DY x3 SOA Bill of Materials Item Part Number Manufacturer Description C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) Qty. 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 C2 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 1 0805(4) 0805(4) 0805(4) R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale Output Voltage: Output Voltage: Output Voltage: Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 P-Channel MOSFET SO-8 3 Programmable Current Limit µCap LDO Regulator 1 Siliconix(5) Q1, Q2, Q3 Si4433DY Vishay U1 MIC5159BM6 Micrel, Inc. (6) 2.5V; 9.76kΩ Resistor, Size 1.8V; 21.5kΩ Resistor, Size 1.5V; 46.4kΩ Resistor, Size 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 M9999-041204 16 April 2004 MIC5159 Micrel Schematic F Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 5A 3.3V 1.8V 2.5A 3.3V 1.5V 2A 3.3V 1.25V 1.75A 2.5V 1.8V 5.5A 2.5V 1.5V 4A 2.5V 1.25V 3A 1.8V 1.25V 6.5A VIN Q4 Q2 Q3 Si4433DY Si4433DY Si4433DY VOUT U1 5 C1 10 F 6.3V m 1 3 MIC5159BM6 GATE 4 IN FB 6 IS GND 2 EN R3 49.9 C2 22 F 6.3V/10V R1 10k W m W C3 22 F 6.3V/10V m R2* GND GND Application Circuit INPUT–OUTPUT VOLTAGE (V) Q1 Si4433DY 6 5 Max. Power Dissipation at 60°C TA 4 3 2 Dropout 1 0 0 2 4 6 OUTPUT CURRENT (A) 8 Si4433DY x4 SOA Bill of Materials Item Part Number Manufacturer Description C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 C2 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 Output Voltage: Output Voltage: Output Voltage: Output Voltage: Qty. 1 0805(4) 0805(4) R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale 2.5V; 9.76kΩ Resistor, Size 1.8V; 21.5kΩ Resistor, Size 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1, Q2, Q3, Q4 Si4433DY Vishay Siliconix(5) P-Channel MOSFET SO-8 4 U1 MIC5159BM6 Micrel, Inc.(6) Programmable Current Limit µCap LDO Regulator 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 April 2004 17 M9999-041204 MIC5159 Micrel Schematic G Input/Output Combination Examples Input Output 1.8V 1.5V Maximum Current 6A Q1 Si4403DY VIN Q2 Si4403DY U1 5 C1 10 F 6.3V m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 W INPUT–OUTPUT VOLTAGE (V) VOUT R1 10k W C2, C3, C4, C5, C6 47 F x 5 m R2* GND GND Application Circuit 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 1 2 3 4 5 6 7 8 9 10 OUTPUT CURRENT (A) Si4403DY x2 SOA Bill of Materials Item Part Number Manufacturer Description GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 C2, C3 GRM43 ER60J476K C4, C5, C6 C4532X5R0J476M Murata TDK 47µF, 6.3V Ceramic MLCC, Size 1812 47µF, 6.3V Ceramic MLCC, Size 1812 1 R1 Vishay Dale(3) 10kΩ Resistor, Size 0805 1 C1 CRCW08051002 Qty. 2.5V; 9.76kΩ Resistor, Size 0805(4) 1.8V; 21.5kΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale Output Voltage: Output Voltage: Output Voltage: Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 Siliconix(5) Q1, Q2 Si4403DY Vishay U1 MIC5159BM6 Micrel, Inc.(6) 1 1 1 1 1 P-Channel MOSFET SO-8 2 Programmable Current Limit µCap LDO Regulator 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 M9999-041204 18 April 2004 MIC5159 Micrel Schematic H Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 2.5A 3.3V 1.8V 1.25A 3.3V 1.5V 1A 3.3V 1.25V 0.75A 2.5V 1.8V 2.5A 2.5V 1.5V 2A 2.5V 1.25V 1.5A 1.8V 1.25V 3A Q1 SUB15P01-52 U1 5 C1 10 F 6.3V m 1 3 MIC5159BM6 EN GATE 4 IN FB 6 IS GND 2 R3 49.9 W R1 10k VOUT INPUT–OUTPUT VOLTAGE (V) VIN W C2 10 F 6.3V m R2* GND GND Application Circuit 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 0.5 1 1.5 2 2.5 3 3.5 4 OUTPUT CURRENT (A) SUB15P01-52 SOA Bill of Materials Item Part Number Manufacturer C1 GRM40 X7R 106 6.3 Murata(1) C2 C2012X5RR0J106M TDK(2) Description Dale(3) Qty. 10µF, 6.3V Ceramic MLCC, Size 0805 1 10µF, 6.3V Ceramic MLCC, Size 0805 1 R1 CRCW08051002 Vishay R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1 SUB15P01-52 Vishay Siliconix(5) P-Channel MOSFET TO-263 1 Programmable Current Limit µCap LDO Regulator 1 U1 MIC5159BM6 Micrel, 10kΩ Resistor, Size 0805 Output Voltage: Output Voltage: Output Voltage: Output Voltage: Inc.(6) 1 2.5V; 9.76KΩ Resistor, Size 0805(4) 1.8V; 21.5KΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 April 2004 19 M9999-041204 MIC5159 Micrel Schematic I Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 5A 3.3V 1.8V 2.5A 3.3V 1.5V 2A 3.3V 1.25V 1.75A 2.5V 1.8V 5.5A 2.5V 1.5V 4A 2.5V 1.25V 3A 1.8V 1.25V 6.5A Q1 SUB15P01-52 VIN Q2 SUB15P01-52 U1 5 C1 10 F 6.3V m 1 3 MIC5159BM6 GATE 4 IN FB 6 IS GND 2 EN R3 49.9 INPUT–OUTPUT VOLTAGE (V) VOUT R1 10k W W C2 22 F 6.3V/10V m R2* GND GND Application Circuit 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 1 2 3 4 5 6 7 OUTPUT CURRENT (A) 8 SUB15P01-52 x2 SOA Bill of Materials Item Part Number Manufacturer Description Qty. C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) C2 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 1 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 1 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1, Q2 SUB15P01-52 Vishay Siliconix(5) P-Channel MOSFET TO-263 2 Programmable Current Limit µCap LDO Regulator 1 U1 MIC5159BM6 Micrel, Output Voltage: Output Voltage: Output Voltage: Output Voltage: 2.5V; 9.76KΩ Resistor, Size 0805 (4) 1.8V; 21.5KΩ Resistor, Size 0805(4) 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) Inc.(6) 1 1 1 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 M9999-041204 20 April 2004 MIC5159 Micrel Schematic J Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 7.5A 3.3V 1.8V 3.75A 3.3V 1.5V 3A 3.3V 1.25V 2.75A 2.5V 1.8V 8A 2.5V 1.5V 6A 2.5V 1.25V 4.5A 1.8V 1.25V 9.5A Q2 SUB15P01-52 Q1 SUB15P01-52 VIN Q3 SUB15P01-52 U1 5 C1 10 F 6.3V m MIC5159BM6 EN GATE 4 1 IN FB 6 3 IS GND 2 R3 49.9 R1 10k W W R2* GND INPUT–OUTPUT VOLTAGE (V) VOUT C2 22 F 6.3V/10V m C3 22 F 6.3V/10V m GND Application Circuit 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 2 4 6 8 10 OUTPUT CURRENT (A) 12 SUB15P01-52 x3 SOA Bill of Materials Item Part Number Manufacturer Description Qty. C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) C2, C3 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 1 Output Voltage: Output Voltage: Output Voltage: Output Voltage: 1 0805(4) 0805(4) R2 CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale 2.5V; 9.76kΩ Resistor, Size 1.8V; 21.5kΩ Resistor, Size 1.5V; 46.4kΩ Resistor, Size 0805(4) 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 Q1, Q2 Q3 SUB15P01-52 Vishay Siliconix(5) P-Channel MOSFET TO-263 3 U1 MIC5159BM6 Micrel, Inc.(6) Programmable Current Limit µCap LDO Regulator 1 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 April 2004 21 M9999-041204 MIC5159 Micrel Schematic K Input/Output Combination Examples Input Output Maximum Current 3.3V 2.5V 3.3V 1.8V 5A 3.3V 1.5V 4.25A 3.3V 1.25V 3.75A 2.5V 1.8V 11A 2.5V 1.5V 8A 2.5V 1.25V 6A 1.8V 1.5V 7A 1.8V 1.25V 13A 10A Q2 SUB15P01-52 VIN Q3 SUB15P01-52 VOUT U1 5 C1 10 F 6.3V m 1 3 MIC5159BM6 GATE 4 IN FB 6 IS GND 2 EN R3 49.9 C2 22 F 6.3V/10V R1 10k m W W C3 22 F 6.3V/10V m R2* GND GND Application Circuit INPUT–OUTPUT VOLTAGE (V) Q1 SUB15P01-52 Q4 SUB15P01-52 6 5 4 Max. Power Dissipation at 60°C TA 3 2 Dropout 1 0 0 2.5 5 7.5 10 12.5 15 OUTPUT CURRENT (A) SUB15P01-52 x4 SOA Bill of Materials Item Part Number Manufacturer Description Qty. C1 GRM40 X7R 106 6.3 C2012X5RR0J106M Murata(1) TDK(2) C2, C3 GRM42-2 X5R 226K 6.3 C3225X5R1A226M Murata TDK 22µF, 6.3V Ceramic MLCC, Size 1210 22µF, 10V Ceramic MLCC, Size 1210 R1 CRCW08051002 Vishay Dale(3) 10kΩ Resistor, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 10µF, 6.3V Ceramic MLCC, Size 0805 1 2 1 0805(4) 0805(4) 0805(4) CRCW08059761 CRCW08052152 CRCW08054642 CRCW08058253 Vishay Dale Vishay Dale Vishay Dale Vishay Dale Output Voltage: Output Voltage: Output Voltage: Output Voltage: R3 CRCW080549R9 F Vishay Dale 49.9Ω Resistor, Size 0805 1 P-Channel MOSFET TO-263 4 Programmable Current Limit µCap LDO Regulator 1 Siliconix(5) Q1, Q2 Q3, Q4 SUB15P01-52 Vishay U1 MIC5159BM6 Micrel, Inc.(6) 2.5V; 9.76kΩ Resistor, Size 1.8V; 21.5kΩ Resistor, Size 1.5V; 46.4kΩ Resistor, Size 1.25V; 825kΩ Resistor, Size 0805(4) 1 1 1 1 R2 Notes: 1. Murata tel: 949-916-4000 2. TDK tel: 1-888-835-6646 3. Vishay Dale tel: 402-563-6866 4. To calculate other output voltage values: R2 = R1 VOUT –1 1.235 5. Vishay Siliconix tel: 402-563-6866 6. Micrel, Inc. tel: 408-944-0800 M9999-041204 22 April 2004 MIC5159 Micrel Package Information 1.90 (0.075) REF 0.95 (0.037) REF 1.75 (0.069) 3.00 (0.118) 1.50 (0.059) 2.60 (0.102) DIMENSIONS: MM (INCH) 1.30 (0.051) 0.90 (0.035) 3.00 (0.118) 2.80 (0.110) 0.20 (0.008) 0.09 (0.004) 10° 0° 0.15 (0.006) 0.00 (0.000) 0.50 (0.020) 0.35 (0.014) 0.60 (0.024) 0.10 (0.004) SOT-23-6 (M6) MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 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 at Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2004 Micrel, Incorporated. April 2004 23 M9999-041204