MIC5332 Micro-Power High Performance Dual 300mA ULDO™ General Description Features The MIC5332 is a tiny dual low quiescent current LDO ideal for applications that are power sensitive. The MIC5332 integrates two high performance 300mA LDOs, and a POR generator into a 2mm x 2mm Thin MLF® package. This solution occupies the same PC board area of a single SOT-23 package. The MIC5332 is designed to reject input noise and provide low output noise with fast transient response so as to respond to any load change quickly even though it is a low quiescent current part. This combination of PSRR, low noise and transient response, along with low power consumption makes for a very high performance, yet general purpose product. The MIC5332 is a µCap design, operating with very small ceramic output capacitors, which reduces required board space and component cost. It is available in fixed output voltages in a tiny 8-pin 2mm x 2mm Thin MLF® leadless package. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. • • • • • • • • • • • 2.3V to 5.5V input voltage range 300mA output current per LDO Very low quiescent current: 25µA per LDO POR output with programmable delay on LDO2 High PSRR - >65dB on each LDO Stable with 1µF ceramic output capacitors Tiny 8-pin 2mm x 2mm Thin MLF® package Ultra-low dropout voltage – 120mV @ 300mA Low output voltage noise – 50µVrms Thermal shutdown protection Current limit protection Applications • • • • • Camera phones Mobile phones PDAs GPS receivers Portable devices ___________________________________________________________________________________________________________ Typical Application MIC5332-xxYMT 10k VIN VOUT1 VI/O EN1 VOUT2 VCORE EN2 VBAT CSET2 CIN 1µF /RST POR2 GND 1µF 1µF µProcessor Camera DSP Power Supply Circuit ULDO is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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 January 2007 M9999-011608-A Micrel, Inc. MIC5332 Ordering Information Manufacturing Part Number Part Number Voltage Junction Temperature Range Package MIC5332-2.5/1.2YMT MIC5332-J4YMT 2.5V/1.2V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-2.8/2.8YMT MIC5332-MMYMT 2.8V/2.8V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-2.8/2.85YMT MIC5332-MNYMT 2.8V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-2.85/2.85YMT MIC5332-NNYMT 2.85V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-3.0/2.8YMT MIC5332-PMYMT 3.0V/2.8V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-3.0/2.85YMT MIC5332-PNYMT 3.0V/2.85V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® MIC5332-3.0/3.0YMT MIC5332-PPYMT 3.0V/3.0V –40° to +125°C 8-Pin 2mm x 2mm Thin MLF® Note: Other voltage options available. Contact Micrel for additional details. Pin Configuration VIN 1 8 VOUT1 GND 2 7 VOUT2 POR2 3 6 CSET2 EN2 4 5 EN1 8-Pin 2mm x 2mm Thin MLF® (MT) (Top View) Pin Description Pin Number Pin Name Pin Function 1 VIN Supply Input. 2 GND Ground. 3 POR2 Power-On Reset Output (Regulator 2): Open-drain output. Active low indicates an output under-voltage condition on regulator 2 when the device is enabled. 4 EN2 Enable Input (Regulator 2): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. 5 EN1 Enable Input (Regulator 1): Active High Input. Logic High = On; Logic Low = Off. Do not leave floating. 6 CSET2 Delay Set Input (Regulator 2): Connect external capacitor to GND to set the internal delay for the POR2 output. When left open, there is no delay. This pin cannot be grounded. 7 VOUT2 Regulator Output – LDO2. 8 VOUT1 Regulator Output – LDO1. January 2007 2 M9999-011608-A Micrel, Inc. MIC5332 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VIN) ............................................. 0V to +6V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN POR2 Voltage (VPOR2) .......................................... 0V to +6V Power Dissipation .................................. Internally Limited(3) Lead Temperature (soldering, 3sec.)......................... 260°C Storage Temperature (Ts) .........................–65°C to +150°C ESD Rating(4) .................................................................. 2kV Supply Voltage (VIN)..................................... +2.3V to +5.5V Enable Input Voltage (VEN1, VEN2) .......................... 0V to VIN POR2 Voltage (VPOR2) ....................................... 0V to +5.5V Junction Temperature (TJ) ........................ –40°C to +125°C Junction Thermal Resistance 2mm x 2mm Thin MLF-8 (θJA) ...........................90°C/W Electrical Characteristics(5) VIN = VEN1 = VEN2 = VOUT + 1.0V, higher of the two regulator outputs; IOUT1 = IOUT2 = 100µA; COUT1 = COUT2 = 1µF; TJ = 25°C, bold values indicate –40°C < TJ < +125°C; unless noted. Parameter Output Voltage Accuracy Condition Min Typ Max Units Variation from nominal VOUT –1.0 +1.0 % Variation from nominal VOUT; –40°C to +125°C –2.0 +2.0 % Line Regulation VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 0.3 0.6 %/V %/V Load Regulation IOUT = 100µA to 300mA 0.2 0.5 % Dropout Voltage IOUT = 50mA 20 40 mV IOUT = 300mA 120 240 mV Ground Current VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA 25 50 µA VEN1 = Low; VEN2 = High; IOUT = 100µA to 300mA 25 50 µA 40 75 µA 0.01 1.0 µA VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA Ground Current in Shutdown VEN1 = VEN2 < 0.2V Ripple Rejection f = 1kHz; COUT = 2.2µF; 65 f = 20kHz; COUT = 2.2µF; Current Limit VOUT = 0V Output Voltage Noise COUT=1µF, 10Hz to 100kHz dB 45 350 550 dB 800 50 mA µVRMS Enable Inputs (EN1/EN2 ) Enable Input Voltage Logic Low 0.2 Logic High Enable Input Current V V 1.2 VIL ≤ 0.2V 0.01 1.0 µA VIH ≥ 1.2V 0.01 1.0 µA COUT = 1µF (Enable of First LDO) 140 500 µs COUT = 1µF (Enable of Second LDO after First Enabled) 110 500 µs Turn-on Time Turn-on Time (LDO1 and 2) POR2 Output (LDO2 only) VTH Low Threshold, % of VOUT2 (POR2 ON) 88 % High Threshold, % of VOUT2 (POR2 OFF) VOL POR2 Output Logic Low Voltage; IL = 250µA IPOR2 POR2 Leakage Current, POR2 OFF January 2007 3 –1.0 98 % 0.02 0.1 V 0.01 +1.0 µA M9999-011608-A Micrel, Inc. Parameter MIC5332 Condition Min Typ Max Units CSET2 Pin Current Source VCSET2 = 0V 0.8 1.4 2 µA CSET2 Pin Threshold Voltage POR2 = High 1.21 1.25 1.29 V CSET2 INPUT Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 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. 4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF. 5. Specification for packaged product only. January 2007 4 M9999-011608-A Micrel, Inc. MIC5332 Typical Characteristics PSRR -100 -90 PSRR 0.14 -90 -80 50mA -80 -70 -60 0.10 -60 -50 300mA -50 -40 0.06 -30 -20 VIN = 2.3V V = 1.2V -10 OUT COUT = 2.2µF 0 -20 VIN = 2.3V -10 VOUT = 1.2V COUT = 1µF 0 0.18 Dropout Voltage vs. Temperature Ground Current vs. Supply Voltage 41 39 300mA 0.08 100mA 0.06 0.04 50mA 0.02 10mA Ground Current vs. Temperature 39 300mA EN1 = EN2 = VIN VIN = VOUT + 1V 33 VOUT = 2.8V COUT = 1µF 30 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 39 Single LDO Enabled 27 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) 5.5 Output Voltage vs. Load Current 25 0 3.0 2.9 2.812 2.8 2.808 2.7 2.800 0 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 50 100 150 200 250 300 LOAD CURRENT (mA) 100K 2.6 Dual LDO Enabled 1.2 10K Single LDO Enabled 50 100 150 200 250 300 LOAD CURRENT (mA) Output Voltage vs. Temperature VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 2.5 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 1.0 650 600 Ground Current vs. Load Current 35 VIN = VOUT + 1V VOUT1 = 2.5V 33 VOUT2 = 1.2V 31 COUT1 = 1µF COUT2 = 1µF 29 2.816 2.804 50 100 150 200 250 300 LOAD CURRENT (mA) 37 POR2 Delay vs. CSET2 Current Limit vs. Supply Voltage 800 750 700 0.8 Output Noise Spectral Density VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Load = 50mA LDO2 0.6 550 500 450 400 350 2.5 25 2.5 2.820 42 100mA 41 Dual LDO Enabled VOUT1 = 2.5V 35 VOUT2 = 1.2V COUT1 = 1µF 33 COUT2 = 1µF 31 IOUT1 = 300mA IOUT2 = 300mA 29 27 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) 10mA 0 0 37 0.12 VOUT = 2.8V COUT = 1µF 0.02 FREQUENCY (Hz) 0.10 850 0.04 FREQUENCY (Hz) VOUT = 2.8V 0.16 COUT = 1µF 0.14 45 0.08 300mA -40 -30 36 0.12 50mA -70 Dropout Voltage vs. Load Current 0.4 1K CIN = 1µF COUT = 1µF 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) January 2007 5.5 100 100 VIN = 3.6V VOUT = 1.2V COUT = 1µF 1K 10K CSET2 (pF) 5 100K 0.2 0 10 100 1K 10K 100K FREQUENCY (Hz) 1M M9999-011608-A Micrel, Inc. MIC5332 Functional Characteristics January 2007 6 M9999-011608-A Micrel, Inc. MIC5332 Functional Diagram VIN VOUT1 LDO1 LDO2 EN1 EN2 Reference Enable Thermal Shutdown POR Delay VOUT2 POR2 CSET2 GND MIC5332 Block Diagram January 2007 7 M9999-011608-A Micrel, Inc. MIC5332 the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. Application Information MIC5332 is a dual 300mA LDO, with an integrated Power On Reset (POR) for the second regulator. The MIC5332 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Power On Reset The second regulator has a Power On Reset status pin (POR2). This pin is an open drain output. When LDO2 is enabled an active low POR2 indicates an under voltage condition on VOUT2. The POR2 status signal can be programmed for a delay of 1sec/µF by placing a capacitor from the CSET2 pin to ground. Zero delay is added by leaving the CSET2 pin open circuit. Input Capacitor The MIC5332 is a high-performance, high bandwidth device. Therefore, it requires a well-bypassed input supply for optimal performance. A 1µF capacitor is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional highfrequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics lose most of their capacitance over temperature and are therefore, not recommended. Thermal Considerations The MIC5332 is designed to provide 300mA of continuous current for both outputs in a very small package. Maximum ambient operating temperature can be calculated based upon the output current and the voltage drop across the part. For example if the input voltage is 3.6V, the output voltage is 3.0V for VOUT1, 2.8V for VOUT2 and the output current = 300mA. The actual power dissipation of the regulator circuit can be determined using the equation: PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) I OUT2 + VIN IGND Because this device is CMOS and the ground current is typically <100µA over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.6V – 3.0V) × 300mA + (3.6V -2.8) × 300mA PD = 0.42W To determine the maximum ambient operating temperature of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: Output Capacitor The MIC5332 requires an output capacitor of 1µF or greater to maintain stability. The design is optimized for use with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1µF ceramic output capacitor and does not improve significantly with larger capacitance. 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. ⎛ TJ(MAX) − TA PD(MAX) = ⎜⎜ θ JA ⎝ TJ(max) = 125°C, and the maximum junction temperature of the die, θJA, thermal resistance = 90°C/W. Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-toambient thermal resistance for the minimum footprint is 90°C/W. The maximum power dissipation must not be exceeded for proper operation. For example, when operating the MIC5332-PMYMT at an input voltage of 3.6V and 300mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.42W = (125°C – TA)/(90°C/W) TA = 87.2°C No-Load Stability Unlike many other voltage regulators, the MIC5332 will remain stable and in regulation with no load. This is especially import in CMOS RAM keep-alive applications. Enable/Shutdown The MIC5332 comes with dual active-high enable pins that allow each regulator to be disabled independently. Forcing the enable pin low disables the regulator and sends it into a “zero” off-mode-current state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin high enables the output voltage. The active-high enable pin uses CMOS technology and January 2007 ⎞ ⎟ ⎟ ⎠ 8 M9999-011608-A Micrel, Inc. MIC5332 Therefore, a 3.0V/2.8V application with 300mA at each output current can accept an ambient operating temperature of 87°C in a 2mm x 2mm MLF® package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the “Regulator Thermals” January 2007 section of Micrel’s Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf 9 M9999-011608-A Micrel, Inc. MIC5332 MIC5332 Typical Application Circuit U1 MIC5332-xxYMT VIN J1 VIN 1 R3 10k R2 10k J3 POR J4 EN2 VOUT1 POR2 VOUT2 8 J6 VOUT1 7 J8 VOUT2 R1 10k 3 4 J5 EN1 VIN 5 EN2 EN1 CSET2 GND C1 1µF 2 6 C4 0.1µF C2 1µF C3 1µF J2 GND J7 GND Bill of Materials Item Part Number C1, C2, C3 C1608X5R0J105K C4 VJ0603Y104KXXAT Manufacturer (1) TDK (2) Vishay (2) R1, R2, R3 CRCW06031002FKEYE3 Vishay U1 MIC5332-XXYMT Micrel (3) Description Qty Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 3 Capacitor, 0.1µF Ceramic, 10V, X7R, Size 0603 1 Resistor, 10kΩ, 1%, 1/16W, Size 0603 3 ® UCAP LDO, Dual 300mA, Size 2mm x 2mm Thin MLF 1 Notes: 1. TDK: www.tdk.com 2. Vishay: www.vishay.com 3. Micrel, Inc.: www.micrel.com January 2007 10 M9999-011608-A Micrel, Inc. MIC5332 PCB Layout Recommendations 1350 (mil) 1400 (mil) Top Layer 1350 (mil) 1400 (mil) Bottom Layer January 2007 11 M9999-011608-A Micrel, Inc. MIC5332 Package Information ® 8-Pin 2mm x 2mm Thin MLF (MT) 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. © 2007 Micrel, Incorporated. January 2007 12 M9999-011608-A