MIC39150/39151 MIC39150 MIC39151 MIC39150/1 MIC29150/1/2/3 MIC39150-2 - Datasheet Archive

 

Micrel MIC39150/39151 1.5A Low-Voltage Low-Dropout Regulator Final Information General Description Features The MIC39150 and

 

MIC39150/39151 MIC39150/39151 Micrel MIC39150/39151 MIC39150/39151 1.5A Low-Voltage Low-Dropout Regulator Final Information General Description Features The MIC39150 MIC39150 and MIC39151 MIC39151 are 1.5A low-dropout linear voltage regulators that provide a low voltage, high current output with a minimum of external components. Utilizing Micrel's proprietary Super eta PNPTM pass element, the MIC39150/1 MIC39150/1 offers extremely low dropout (typically 375mV at 1.5A) and low ground current (typically 17mA at 1.5A). The MIC39150/1 MIC39150/1 is ideal for PC add-in cards that need to convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC39150/1 MIC39150/1 to provide 2.5V from a supply as low as 3V or 1.8V from a supply as low as 2.3V. The MIC39150/1 MIC39150/1 also has fast transient response for heavy switching applications. This device requires only 10µF of output capacitance to maintain stability and achieve fast transient response The MIC39150/1 MIC39150/1 is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversedlead insertion, and reverse-leakage protection. The MIC39151 MIC39151 offers a TTL-logic compatible enable pin and an error flag that indicates undervoltage and over current conditions. Offered in fixed voltages of 2.5V, 1.8V and 1.65V, the MIC39150/1 MIC39150/1 comes in the TO-220 and TO-263 packages and is an ideal upgrade to older, NPN-based linear voltage regulators. · 1.5A minimum guaranteed output current · 500mV maximum dropout voltage over temperature Ideal for 3.0V to 2.5V conversion Ideal for 2.5 to 1.8V or 1.65V conversion · 1% initial accuracy · Low ground current · Current limiting and Thermal shutdown · Reversed-battery and reversed lead insertion protection · Reversed-leakage protection · Fast transient response · TO-263 and TO-220 packaging · TTL/CMOS compatible enable pin (MIC39151 MIC39151 only) · Error flag output (MIC39151 MIC39151 only) Applications · · · · · · Low-voltage digital ICs LDO linear regulator for PC add-in cards High-efficiency linear power supplies SMPS post regulator Low-voltage microcontrollers StrongARMTM processor supply For applications requiring input voltage greater than 16V or automotive load dump protection, see the MIC29150/1/2/3 MIC29150/1/2/3 family. Typical Application 100k MIC39150-2 MIC39150-2.5 VIN 3.3V IN OUT GND MIC39151-2 MIC39151-2.5 VOUT 2.5V ENABLE SHUTDOWN VIN 3.3V 10µF tantalum EN FLG ERROR FLAG OUTPUT IN OUT VOUT 2.5V GND 10µF tantalum MIC39150 MIC39150 MIC39151 MIC39151 StrongARM is a trademark of Advanced RSIC Machines, Ltd. Micrel, Inc. · 1849 Fortune Drive · San Jose, CA 95131 · USA · tel + 1 (408) 944-0800 · fax + 1 (408) 944-0970 · http://www.micrel.com June 2001 1 MIC39150/39151 MIC39150/39151 MIC39150/39151 MIC39150/39151 Micrel Ordering Information Part Number Voltage Temperature Range Package MIC39150-1 MIC39150-1.65BT 1.65V ­40°C to +125°C 3-lead TO-220 MIC39150-1 MIC39150-1.65BU 1.65V ­40°C to +125°C 3-lead TO-263 MIC39151-1 MIC39151-1.65BT 1.65V ­40°C to +125°C 5-lead TO-220 MIC39151-1 MIC39151-1.65BU 1.65V ­40°C to +125°C 5-lead TO-263 MIC39150-1 MIC39150-1.8BT 1.8V ­40°C to +125°C 3-lead TO-220 MIC39150-1 MIC39150-1.8BU 1.8V ­40°C to +125°C 3-lead TO-263 MIC39151-1 MIC39151-1.8BT 1.8V ­40°C to +125°C 5-lead TO-220 MIC39151-1 MIC39151-1.8BU 1.8V ­40°C to +125°C 5-lead TO-263 MIC39150-2 MIC39150-2.5BT 2.5V ­40°C to +125°C 3-lead TO-220 MIC39150-2 MIC39150-2.5BU 2.5V ­40°C to +125°C 3-lead TO-263 MIC39151-2 MIC39151-2.5BT 2.5V ­40°C to +125°C 5-lead TO-220 MIC39151-2 MIC39151-2.5BU 2.5V ­40°C to +125°C 5-lead TO-263 Pin Configuration OUT GND 1 IN 3 IN MIC39150-x.xBU TO-263-3 (U) FLG OUT GND IN EN 5 4 3 2 1 TAB 5 4 3 2 1 TAB GND 1 MIC39150-x.xBT TO-220-3 (T) OUT 2 TAB 2 TAB 3 FLG OUT GND IN EN MIC39151-x.xBU TO-263-5 (U) MIC39151-x.xBT TO-220-5 (T) Pin Description Pin Number MIC39150 MIC39150 Pin Number MIC39151 MIC39151 Pin Name 1 EN Enable (Input): TTL/CMOS compatible input. Logic high = enable; logic low or open = shutdown 1 2 IN Unregulated Input: +16V maximum supply. 2, TAB 3, TAB GND Ground: Ground pin and TAB are internally connected. 3 4 OUT Regulator Output 5 FLG Error Flag (Ouput): Open-collector output. Active low indicates an output fault condition. MIC39150/39151 MIC39150/39151 Pin Function 2 June 2001 MIC39150/39151 MIC39150/39151 Micrel Absolute Maximum Ratings (Note 1) Operating Ratings (Note 2) Supply Voltage (VIN) . ­20V to +20V Enable Voltage (VEN) . +20V Storage Temperature (TS) . ­65°C to +150°C Lead Temperature (soldering, 5 sec.) . 260°C ESD, Note 3 Supply Voltage (VIN) . +2.25V to +16V Enable Voltage (VEN) . +16V Maximum Power Dissipation (PD(max) . Note 4 Junction Temperature (TJ) . ­40°C to +125°C Package Thermal Resistance TO-263 (JC) . 2°C/W TO-220 (JC) . 2°C/W Electrical Characteristics VIN = VOUT +1V; VEN = 2.4V; TJ = 25°C, bold values indicate ­40°C TJ +125°C; unless noted Symbol Parameter Condition VOUT Output Voltage 10mA 10mA IOUT 1.5A, VOUT + 1V VIN 8V Line Regulation IOUT = 10mA, VOUT + 1V VIN 16V Load Regulation VIN = VOUT + 1V, 10mA IOUT 1.5A, 1 2 % % 0.06 0.5 % 0.2 1 % 20 100 ppm/°C IOUT = 100mA, VOUT = ­1% 80 200 mV 260 IOUT = 1.5A, VOUT = ­1% 375 500 mV IOUT = 750mA, VIN = VOUT + 1V 4 20 mA IOUT = 1.5A, VIN = VOUT + 1V Dropout Voltage, Note 6 Units IGND Ground Current, Note 7 Typ 17 mA ­1 ­2 Output Voltage Temp. Coefficient, Note 5 VDO Max IOUT = 750mA, VOUT = ­1% VOUT/T Min mV IGND(do) Dropout Ground Pin Current VIN VOUT(nominal) ­ 0.5V, IOUT = 10mA 1.1 mA IOUT(lim) Current Limit VOUT = 0V, VIN = VOUT + 1V 2.8 A IOUT(min) Minimum Load Current 7 10 mA 0.8 V Enable Input (MIC39151 MIC39151) VEN Enable Input Voltage logic low (off) logic high (on) IIN Enable Input Current 2.25 V µA µA µA µA 10 1 30 75 2 4 VEN = 2.25V 20 µA 15 VEN = 0.8V IOUT(shdn) Shutdown Output Current Note 8 Flag Output (MIC39151 MIC39151) IFLG(leak) Output Leakage Current VOH = 16V 0.01 1 2 µA µA VFLG(do) Output Low Voltage VIN = 2.250V, IOL, = 250µA, Note 9 180 300 400 mV mV VFLG Low Threshold % of VOUT High Threshold % of VOUT 93 99.2 Hysteresis June 2001 % 1 3 % % MIC39150/39151 MIC39150/39151 MIC39150/39151 MIC39150/39151 Micrel Note 1. Exceeding the absolute maximum ratings June damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3. Devices are ESD sensitive. Handling precautions recommended. Note 4. PD(max) = (TJ(max) ­ TA) ÷ JA, where JA depends upon the printed circuit layout. See "Applications Information." Note 5. Output voltage temperature coefficient is VOUT(worst case) ÷ (TJ(max) ­ TJ(min) where TJ(max) is +125°C and TJ(min) is ­40°C. Note 6. VDO = VIN ­ VOUT when VOUT decreases to 98% of its nominal output voltage with VIN = VOUT + 1V. For output voltages below 2.25V, dropout voltage is the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V. Note 7. IGND is the quiescent current. IIN = IGND + IOUT. Note 8. VEN 0.8V, VIN 8V, and VOUT = 0V. Note 9. For a 2.5V device, VIN = 2.250V (device is in dropout). MIC39150/39151 MIC39150/39151 4 June 2001 MIC39150/39151 MIC39150/39151 Micrel Typical Characteristics Power Supply Rejection Ratio VIN = 3.3V VOUT = 2.5V 50 30 20 20 ILOAD = 1.5A COUT = 47µF CIN = 0 10 Dropout Voltage vs. Temperature 200 ILOAD = 1.5A 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) ILOAD = 100mA 2.2 2.0 1.8 ILOAD = 1.5A 1.6 ILOAD = 750mA 1.4 1.2 0.6 0.4 ILOAD = 10mA 0 8 2 4 6 8 10 SUPPLY VOLTAGE (V) 12 Ground Current vs. Temperature 7 6 VOUT = 2.5V 5 4 VOUT = 1.8V 3 2 1 ILOAD = 750mA 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) June 2001 25 GROUND CURRENT (mA) 0.2 ILOAD = 1500mA ILOAD = 1000mA ILOAD = 750mA 0 2 4 6 8 10 SUPPLY VOLTAGE (V) 12 5 VOUT = 2.5V VOUT = 2.5V 15 VOUT = 1.8V 10 ILOAD = 1.5A 5 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 5 0 250 500 750 1000 1250 1500 OUTPUT CURRENT (mA) Ground Current vs. Temperature 0.35 0.34 VOUT = 1.8V 0.33 0.32 V = 2.5V OUT 0.31 ILOAD = 10mA 0.30 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Ground Current vs. Temperature 20 VOUT = 1.8V 10 0.36 GROUND CURRENT (mA) 0.8 65 60 55 50 45 40 35 30 25 20 15 10 5 0 SHORT CIRCUIT CURRENT (A) ILOAD = 100mA 1.0 15 INPUT VOLTAGE (V) GROUND CURRENT (mA) 1.4 20 0 Ground Current vs. Supply Voltage 1.6 500 1000 1500 OUTPUT CURRENT (mA) 25 2.4 1.8 1.2 0 Ground Current vs. Output Current 2.6 Ground Current vs. Supply Voltage GROUND CURRENT (mA) 0 GROUND CURRENT (mA) VOUT = 2.5V 100 VOUT = 2.5V 100 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 VOUT = 1.8V 300 GROUND CURRENT (mA) 200 2.8 400 VOUT = 1.8V 300 Dropout Characteristics 500 0.0 400 0 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1k 10k 100k 1M 10 100 FREQUENCY (Hz) OUTPUT VOLTAGE (V) DROPOUT VOLTAGE (mV) VIN = 3.3V VOUT = 2.5V 30 ILOAD = 1.5A 10 COUT = 10µF CIN = 0 0 1E+1 1E+2 1E+3 1E+4 1E+5 1E+6 1k 10k 100k 1M 10 100 FREQUENCY (Hz) 600 Dropout Voltage vs. Output Current 500 40 40 PSRR (dB) PSRR (dB) Power Supply Rejection Ratio 50 DROPOUT VOLTAGE (mV) 60 3.5 3.0 2.5 Short Circuit vs. Temperature typical 2.5V device typical 1.8V device 2.0 1.5 1.0 0.5 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) MIC39150/39151 MIC39150/39151 MIC39150/39151 MIC39150/39151 FLAG VOLTAGE (V) VIN = 5V 5 4 FLAG HIGH (OK) 3 2 FLAG LOW (FAULT) 1 0 0.01 0.1 12 10 Enable Current vs. Temperature VIN = VOUT + 1V VEN = 2.4V 8 6 4 2 0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) 1 10 100 100010000 RESISTANCE (k) 250 FLAG VOLTAGE (mV) Error Flag Pull-Up Resistor ENABLE CURRENT µA) 6 Micrel 200 Flag-Low Voltage vs. Temperature FLAG-LOW VOLTAGE 150 100 VIN = 2.25V RPULL-UP = 22k 50 0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) Output Voltage vs. Temperature OUTPUT VOLTAGE (V) 1.70 1.69 1.68 1.67 1.66 1.65 1.64 1.63 1.62 1.61 1.60 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (°C) MIC39150/39151 MIC39150/39151 6 June 2001 MIC39150/39151 MIC39150/39151 Micrel Functional Characteristics OUTPUT VOLTAGE (500mV/div.) Load Transient Response VIN = 3.3V VOUT = 2.5V COUT = 47µF 1.5A LOAD CURRENT (500mA/div.) 1.5A LOAD CURRENT (500mA/div.) OUTPUT VOLTAGE (500mV/div.) Load Transient Response VIN = 3.3V VOUT = 2.5V COUT = 10µF 100mA TIME (250µs/div.) 10mA TIME (250µs/div.) OUTPUT VOLTAGE (50mV/div.) Line Transient Response VOUT = 2.5V COUT = 10µF ILOAD = 10mA 5V INPUT VOLTAGE (2V/div.) 3.3V TIME (500µs/div.) Functional Diagram OUT IN O.V. ILIMIT 1.180V FLAG* Ref. 18V 1.240V EN* Thermal Shutdown GND * MIC39151 MIC39151 only June 2001 7 MIC39150/39151 MIC39150/39151 MIC39150/39151 MIC39150/39151 Micrel compared with the dropout voltage. Use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. The low dropout properties of Micrel Super eta PNP regulators allow significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a capacitor of at least 1µF is needed directly between the input and regulator ground. Refer to Application Note 9 for further details and examples on thermal design and heat sink specification. Output Capacitor The MIC39150/1 MIC39150/1 requires an output capacitor to maintain stability and improve transient response. Proper capacitor selection is important to ensure proper operation. The MIC39150/1 MIC39150/1 output capacitor selection is dependent upon the ESR (equivalent series resistance) of the output capacitor to maintain stability. When the output capacitor is 10µF or greater, the output capacitor should have an ESR less than 2. This will improve transient response as well as promote stability. Ultralow ESR capacitors (