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 power-on-reset (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 Current-limit and thermal-shutdown protection Applications • • • • • Camera phones Mobile phones PDAs GPS receivers Portable devices ___________________________________________________________________________________________________________ Typical Application 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 September 2012 M9999-091212-B Micrel, Inc. MIC5332 Ordering Information Marking Code Manufacturing Part Number Voltage (V)(1, 2) Junction Temperature Range Package(3) MIC5332-1.8/1.2YMT WG4 MIC5332-G4YMT 1.8/1.2 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-2.5/1.2YMT WJ4 MIC5332-J4YMT 2.5/1.2 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-2.8/2.8YMT WMM MIC5332-MMYMT 2.8/2.8 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-2.8/2.85YMT WMN MIC5332-MNYMT 2.8/2.85 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-2.85/2.85YMT WNN MIC5332-NNYMT 2.85/2.85 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-3.0/2.8YMT WPM MIC5332-PMYMT 3.0/2.8 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-3.0/2.85YMT WPN MIC5332-PNYMT 3.0/2.85 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-3.0/3.0YMT WPP MIC5332-PPYMT 3.0/3.0 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF MIC5332-3.3 /3.3YMT WSS MIC5332-SSYMT 3.3/3.3 –40° to +125°C 8-Pin 2mm x 2mm Thin MLF Part Number Notes: 1. For other voltage options, contact Micrel Marketing for details. 2. Pin 1 identifier = . 3. MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. ▲ Pin Configuration 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 undervoltage 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 EP ePad September 2012 Regulator Output – LDO1. .Exposed Heat Sink Pad. Connect to GND for best thermal performance. 2 M9999-091212-B 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, 10sec.)....................... 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. Variation from nominal VOUT –1.0 Typ. Max. +1.0 Variation from nominal VOUT; –40°C to +125°C –2.0 +2.0 Units % Line Regulation VIN = VOUT +1V to 5.5V; IOUT = 100µA 0.02 0.3 0.6 %/V Load Regulation IOUT = 100µA to 300mA 0.2 0.5 % Dropout Voltage Ground Current Ground Current in Shutdown Ripple Rejection IOUT = 50mA 20 40 mV IOUT = 300mA 120 240 mV VEN1 = High; VEN2 = Low; IOUT = 100µA to 300mA 25 50 VEN1 = Low; VEN2 = High; IOUT = 100µA to 300mA 25 50 VEN1 = VEN2 = High; IOUT1= 300mA, IOUT2 = 300mA 40 75 0.01 1.0 VEN1 = VEN2 < 0.2V f = 1kHz; COUT = 2.2µF; 65 f = 20kHz; COUT = 2.2µF; 45 Current Limit VOUT = 0V Output Voltage Noise COUT=1µF, 10Hz to 100kHz 350 550 µA µA dB 800 50 mA µVRMS Enable Inputs (EN1/EN2 ) Enable Input Voltage Enable Input Current 0.2 Logic Low 1.2 Logic High VIL ≤ 0.2V 0.01 1.0 VIH ≥ 1.2V 0.01 1.0 COUT = 1µF (Enable of First LDO) 140 500 COUT = 1µF (Enable of Second LDO after First Enabled) 110 500 V µA Turn-on Time Turn-On Time (LDO1 and 2) µs 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. September 2012 3 M9999-091212-B Micrel, Inc. MIC5332 Electrical Characteristics(5) (Continued) 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 Condition Min. Typ. Max. Units POR2 Output (LDO2 only) VTH Low Threshold, % of VOUT2 (POR2 ON) 88 High Threshold, % of VOUT2 (POR2 OFF) 98 % 0.02 0.1 V –1.0 0.01 +1.0 µA VCSET2 = 0V 0.8 1.4 2 µA POR2 = High 1.21 1.25 1.29 V VOL POR2 Output Logic Low Voltage; IL = 250µA IPOR2 POR2 Leakage Current, POR2 OFF CSET2 Pin Current Source CSET2 Pin Threshold Voltage CSET2 INPUT September 2012 4 M9999-091212-B Micrel, Inc. MIC5332 Typical Characteristics PSRR PSRR -80 50mA -80 -70 -60 -50 -40 0.10 -60 -50 300mA 0.08 300mA -40 0.06 -30 0.04 -20 VIN = 2.3V -10 VOUT = 1.2V COUT = 1µF 0 FREQUENCY (Hz) Dropout Voltage vs. Temperature VOUT = 2.8V 0.16 COUT = 1µF 0.14 39 300mA 0.10 0.08 100mA 0.06 0.04 50mA 0.02 10mA 0 -40 -20 0 20 40 60 80 100 120 TEMPERATURE (°C) Ground Current vs. Temperature 0 05 Ground Current vs. Supply Voltage 41 39 Dual LDO Enabled 37 25 2.5 2.820 Single LDO Enabled 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) 27 5.5 Output Voltage vs. Load Current 25 05 3.0 2.816 2.9 39 2.812 2.8 2.808 2.7 10mA 100mA 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) September 2012 2.804 2.800 05 Ground Current vs. Load Current Dual LDO Enabled 35 VIN = VOUT + 1V VOUT1 = 2.5V 33 VOUT2 = 1.2V 31 COUT1 = 1µF COUT2 = 1µF 29 42 36 0 100 150 200 250 300 LOAD CURRENT (mA) 37 VOUT1 = 2.5V 35 VOUT2 = 1.2V COUT1 = 1µF 33 COUT2 = 1µF 31 IOUT1 = 300mA IOUT2 = 300mA 29 27 VOUT = 2.8V COUT = 1µF 0.02 FREQUENCY (Hz) 41 0.12 45 0.12 50mA -70 -30 -20 VIN = 2.3V V = 1.2V -10 OUT COUT = 2.2µF 0 0.18 0.14 -90 -100 -90 Dropout Voltage vs. Load Current VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF 0 100 150 200 250 300 LOAD CURRENT (mA) 5 2.6 Single LDO Enabled 0 100 150 200 250 300 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) M9999-091212-B Micrel, Inc. MIC5332 Typical Characteristics (Continued) 850 800 POR2 Delay vs. CSET2 Current Limit vs. Supply Voltage 100K 1.0 750 700 650 10K 0.8 VIN = VOUT + 1V VOUT = 2.8V COUT = 1µF Load = 50mA LDO2 600 550 0.6 0.4 1K 500 450 400 350 2.5 1.2 Output Noise Spectral Density CIN = 1µF COUT = 1µF 3 3.5 4 4.5 5 SUPPLY VOLTAGE (V) September 2012 5.5 100 100 VIN = 3.6V VOUT = 1.2V COUT = 1µF 1K 10K CSET2 (pF) 6 100K 0.2 0 10 100 1K 10K 100K FREQUENCY (Hz) 1M M9999-091212-B Micrel, Inc. MIC5332 Functional Characteristics September 2012 7 M9999-091212-B Micrel, Inc. MIC5332 Functional Diagram MIC5332 Block Diagram September 2012 8 M9999-091212-B Micrel, Inc. MIC5332 Application Information 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 the enable pin cannot be left floating; a floating enable pin may cause an indeterminate state on the output. 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. 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. 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 undervoltage 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. 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. 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 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. September 2012 9 M9999-091212-B Micrel, Inc. MIC5332 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: ⎛ 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 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” 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 September 2012 10 M9999-091212-B Micrel, Inc. MIC5332 MIC5332 Typical Application Circuit Bill of Materials Item C1, C2, C3 Part Number C1608X5R0J105K C4 VJ0603Y104KXXAT R1, R2, R3 CRCW06031002FKEYE3 U1 MIC5332-XXYMT Manufacturer (1) TDK (2) Vishay Vishay 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 µCAP 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. September 2012 11 M9999-091212-B Micrel, Inc. MIC5332 PCB Layout Recommendations 1350 (mil) 1400 (mil) Top Layer 1350 (mil) 1400 (mil) Bottom Layer September 2012 12 M9999-091212-B 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 Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. 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. September 2012 13 M9999-091212-B