MIC5318-2.1YD5-TR

MIC5318 High Performance 300 mA µCap Ultra-Low Dropout Regulator Features General Description • • • • • • • • • The MIC5318 is a high performance, single output ultra-low dropout regulator, offering low total output noise in an ultra-small UDFN package. The MIC5318 is capable of sourcing 300 mA output current and offers high PSRR and low output noise, making it an ideal solution for RF applications. Ultra-Low Dropout Voltage 110 mV @ 300 mA Input Voltage Range: 2.3V to 6.0V 300 mA Guaranteed Output Current Stable with Ceramic Output Capacitors Ultra-Low Output Noise: 30 µVRMS Low Quiescent Current: 85 µA Total High PSRR > 70 dB @ 1 kHz Less than 35 µs Turn-On Time High Output Accuracy - ±2% Initial Accuracy - ±3% over Temperature • Thermal Shutdown and Current-Limit Protection • Tiny 6-lead 1.6 mm x 1.6 mm UDFN package • Thin SOT23-5 Package Applications • • • • • Ideal for battery operated applications, the MIC5318 offers 2% initial accuracy, extremely low dropout voltage (110 mV @ 300 mA), and low ground current (typically 85 µA total). The MIC5318 can also be put into a “zero” off-mode current state, drawing no current when disabled. The MIC5318 is available in the 1.6 mm x 1.6 mm UDFN package, occupying only 2.56 mm2 of PCB area, fully a 36% reduction in board area when compared to SC-70 and 2 mm x 2 mm UDFN packages. The MIC5318 has an operating junction temperature range of –40°C to +125°C and is available in fixed and adjustable output voltages in lead-free (RoHS compliant) UDFN and Thin SOT23-5 packages. Mobile Phones PDAs GPS Receivers Portable Electronics Digital Still and Video Cameras Package Types MIC5318 (FIXED) 6-Lead UDFN (MT) (Top View) EN 1 6 BYP GND 2 5 NC IN 3 4 OUT MIC5318 (ADJ.) 6-Lead UDFN (MT) (Top View) EN 1 6 BYP GND 2 5 ADJ IN 3 4 OUT MIC5318 (FIXED) 5-Lead TSOT23 (D5) (Top View) MIC5318 (ADJ.) 5-Lead TSOT23 (D5) (Top View) EN GND IN 1 2 3 EN GND IN 1 2 3 4 BYP 4 ADJ 5 OUT  2021 Microchip Technology Inc. 5 OUT DS20006578A-page 1 MIC5318 Typical Application Circuit MIC5318-x.xYMT 1.6mm 1.6mm VIN VIN VOUT EN BYP 1μF 1μF GND RF Transceiver 0.01μF Functional Block Diagrams Fixed Version VIN VOUT EN VREF QuickStart Error LDO Amp BYP Thermal Shutdown Current Limit GND Adjustable Version VIN VOUT EN VREF QuickStart Error LDO Amp BYP ADJ Thermal Shutdown Current Limit GND DS20006578A-page 2  2021 Microchip Technology Inc. MIC5318 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Supply Voltage (VIN) ...................................................................................................................................... 0V to +6.5V Enable Input Voltage (VEN) ............................................................................................................................ 0V to +6.5V Power Dissipation (Note 1) .................................................................................................................... Internally Limited ESD Rating .............................................................................................................................................................Note 2 Operating Ratings ‡ Supply Voltage (VIN) ................................................................................................................................. +2.3V to +6.0V Enable Input Voltage (VEN) .................................................................................................................................0V to VIN † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. ‡ Notice: The device is not guaranteed to function outside its operating rating. Note 1: 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. 2: Devices are ESD sensitive. Handling precautions are recommended. Human body model. ELECTRICAL CHARACTERISTICS Electrical Characteristics: VIN = VOUT + 1.0V; COUT = 1.0 µF; IOUT = 100 µA; TJ = +25°C, bold values valid for –40°C to +125°C, unless noted. (Note 1) Parameter Symbol Min. Typ. Max. –2.0 — 2.0 –3.0 — 3.0 Units Conditions Variation from nominal VOUT Output Voltage Accuracy VOUT Line Regulation ΔVOUT/ (VOUT x ΔVIN) — 0.02 0.6 %/V VIN = VOUT + 1V to 6.0V; IOUT = 100 µA ΔVOUT/ VOUT — 0.2 2.0 % IOUT = 100 µA to 300 mA — 17 — — 50 100 — 110 200 Load Regulation (Note 2) Dropout Voltage (Note 3) VDO % Variation from nominal VOUT; –40°C to +125°C IOUT = 50 mA; VOUT ≥ 2.8V mV IOUT = 150 mA; VOUT ≥ 2.8V IOUT = 300 mA; VOUT ≥ 2.8V Ground Pin Current (Note 4) IGND — 85 150 µA IOUT = 0 mA to 300 mA Ground Pin Current in Shutdown ISHDN — 0.01 1 µA VEN ≤ 0.2V Note 1: 2: 3: 4: Specification for packaged product only. Regulation is measured at constant junction temperature using low duty cycle pulse testing, changes in output voltage due to heating effects are covered by the thermal regulation specification. 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 2.3V, dropout voltage is the input-to-output differential with the minimum input voltage 2.3V. Ground pin current is the regulation quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current.  2021 Microchip Technology Inc. DS20006578A-page 3 MIC5318 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Characteristics: VIN = VOUT + 1.0V; COUT = 1.0 µF; IOUT = 100 µA; TJ = +25°C, bold values valid for –40°C to +125°C, unless noted. (Note 1) Parameter Ripple Rejection Symbol Min. Typ. Max. — 75 — PSRR Units dB — 55 — Current Limit ILIM 340 500 900 mA Output Voltage Noise eN — 30 — µVRMS — — 0.2 1.1 — — — 0.01 1 — 0.01 1 — 30 100 Conditions f = Up to 1 kHz; COUT = 1.0 µF; CBYP = 0.1 µF f = 1 kHz to 20 kHz; COUT = 1.0 µF; CBYP = 0.1 µF VOUT = 0V COUT = 1.0 µF; CBYP = 0.1 µF; 10 Hz to 100 kHz Enable Input Enable Input Voltage VEN Enable Input Current IEN V µA Logic Low Logic High VIL ≤ 0.2V VIH ≥ 1.0V Turn-On Time Turn-On Time Note 1: 2: 3: 4: tON µs COUT = 1.0 µF; CBYP = 0.1 µF; IOUT = 150 mA Specification for packaged product only. Regulation is measured at constant junction temperature using low duty cycle pulse testing, changes in output voltage due to heating effects are covered by the thermal regulation specification. 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 2.3V, dropout voltage is the input-to-output differential with the minimum input voltage 2.3V. Ground pin current is the regulation quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin current. TEMPERATURE SPECIFICATIONS Parameters Sym. Min. Typ. Max. Units Conditions Maximum Junction Temperature Range TJ(MAX) –40 — +125 °C — Operating Temperature Range TJ –40 — +125 °C — Storage Temperature Range TS –65 — +150 °C — Lead Temperature — — — +260 °C Soldering, 3 sec. Thermal Resistance, UDFN 6-Lead θJA — 100 — °C/W — Thermal Resistance, TSOT23-5 θJA — 235 — °C/W — Temperature Ranges Package Thermal Resistance Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum rating. Sustained junction temperatures above that maximum can impact device reliability. DS20006578A-page 4  2021 Microchip Technology Inc. MIC5318 2.0 Note: TYPICAL OPERATING CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. dB -100 -90 -80 -70 -60 300mA 150mA -50 -40 -30 VIN = VOUT + 1V -20 VOUT = 2.8V 50mA C = 1μF -10 COUT = 0.1μF BYP 0 0.1 1 10 100 1,000 FREQUENCY (kHz) FIGURE 2-1: Ratio. Power Supply Rejection 2.0 1.9 1.8 VIN = VOUT + 1V VOUT = 1.8V COUT = 1μF IOUT = 100μA 1.6 2.85 2.80 2.75 2.70 05 FIGURE 2-4: Current. 1.5 TEMPERATURE (°C) FIGURE 2-2: Temperature. Output Voltage vs. 2.5 100μA 1.5 1.0 300mA 0.5 0 0 FIGURE 2-3: Voltage. VOUT = 2.8V COUT = 1μF 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 Output Voltage vs. Supply  2021 Microchip Technology Inc. 0 100 150 200 250 300 OUTPUT CURRENT (mA) Output Voltage vs. Output 300mA 150mA 50mA TEMPERATURE (°C) 3.0 2.0 VIN = VOUT + 1V VOUT = 2.8V COUT = 1μF 140 130 COUT = 1μF 120 110 100 90 80 70 60 50 40 30 20 10 0 2.1 1.7 2.90 FIGURE 2-5: Temperature. 120 110 100 90 80 70 60 50 40 30 20 10 0 05 FIGURE 2-6: Current. Dropout Voltage vs. VOUT = 2.8V COUT = 1μF 0 100 150 200 250 300 OUTPUT CURRENT (mA) Dropout Voltage vs. Output DS20006578A-page 5 MIC5318 100 90 300mA 80 70 60 50 40 600 580 560 540 520 500 480 100μA 30 20 10 0 460 440 420 400 2 2.5 3 3.5 4 4.5 5 5.5 6 INPUT VOLTAGE (V) VIN = VOUT + 1V VOUT = 1.8V COUT = 1μF TEMPERATURE (°C) FIGURE 2-7: Temperature. FIGURE 2-10: Voltage. Current Limit vs. Input 10 1 0.1 0.01 VIN = 4V VOUT = 2.8V COUT = 1μF CBYP = 0.1μF 0.001 0.01 0.1 1 10 100 1,000 10,000 FREQUENCY (kHz) VIN = VOUT + 1V VOUT = 2.8V COUT = 1μF 0 100 150 200 250 300 OUTPUT CURRENT (mA) Ground Pin Current vs. 110 100 90 80 300mA 100μA 70 60 50 40 30 20 10 0 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 INPUT VOLTAGE (V) FIGURE 2-9: Input Voltage. DS20006578A-page 6 Ground Pin Current vs. FIGURE 2-11: Density. Output Noise Spectral Enable (0.5V/div) FIGURE 2-8: Output Current. VIN = VOUT + 1V Output Voltag e (1V/div) 110 100 90 80 70 60 50 40 30 20 10 0 05 Ground Pin Current vs. VOUT = 2.8V COUT = 1μF CBYP = 0.1μF Time (10μs/div ) FIGURE 2-12: Enable Turn-On.  2021 Microchip Technology Inc. MIC5318 Output Voltag e (50mVV/div) Input Voltag e (2V/div) 6V 3V 300mA VIN = VOUT + 1V VOUT = 1.8V VOUT = 2.8V Output Voltag e (50mV/div) CBYP = 0.1μF IOUT = 10mA Output Current (100mA/div) COUT = 1μF COUT = 1μF 10mA Time (40μs/div ) Time (40μs/div ) FIGURE 2-13: Line Transient.  2021 Microchip Technology Inc. FIGURE 2-14: Load Transient. DS20006578A-page 7 MIC5318 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin Number Pin Number Pin Number UDFN-6 UDFN-6 TSOT23-5 (Fixed) (Adj.) (Fixed) Pin Number TSOT23-5 (Adj). Pin Name Description Enable Input. Active-High. High = on, low = off. Do not leave floating. 1 1 3 3 EN 2 2 2 2 GND 3 3 1 1 IN 4 4 5 5 OUT Output Voltage. 5 — — — NC No connection. — 5 — 4 ADJ Adjust Input. Connect to external resistor voltage divider network. 6 6 4 — BYP Reference Bypass: Connect external 0.01 µF to GND for reduced Output Noise. May be left open. ePad ePad — — EP Exposed Heat Sink Pad: connected to ground internally. DS20006578A-page 8 Ground Supply Input.  2021 Microchip Technology Inc. MIC5318 4.0 APPLICATION INFORMATION 4.1 Enable/Shutdown The MIC5318 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 “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. 4.2 Input Capacitor The MIC5318 is a high-performance, high bandwidth device. Therefore, it requires a well-bypassed input supply for optimal performance. A 1 µF capacitor is required from the input to ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional high-frequency capacitors, such as small-valued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. 4.3 Output Capacitor The MIC5318 requires an output capacitor of 1 µF 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 1 µF 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. 4.4 Bypass Capacitor A capacitor can be placed from the noise bypass pin to ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1 μF capacitor is recommended for applications that require low-noise outputs. The bypass capacitor can be increased, further reducing noise and improving PSRR. Turn-on time increases slightly with respect to bypass capacitance. A unique, quick-start circuit allows the MIC5318 to drive a large capacitor on the bypass pin  2021 Microchip Technology Inc. without significantly slowing turn-on time. Refer to the Typical Operating Characteristics for performance with different bypass capacitors. 4.5 No-Load Stability Unlike many other voltage regulators, the MIC5318 will remain stable and in regulation with no load. This is especially crucial for CMOS RAM keep-alive applications. 4.6 Adjustable Regulator Application Adjustable regulators use the ratio of two resistors to multiply the reference voltage to produce the desired output voltage. The MIC5318 can be adjusted from 1.25V to 5.5V by using two external resistors (Figure 4-1). The resistors set the output voltage based on the following equation: EQUATION 4-1: R1 V OUT = V REF   1 + -------  R2 Where: VREF = 1.25V MIC5318YMT VIN VOUT VIN VOUT R1 1μF EN FIGURE 4-1: 4.7 ADJ GND 1μF R2 Adjustable Voltage Output. Thermal Considerations The MIC5318 is designed to provide 300 mA of continuous current. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. Given that the input voltage is 3.3V, the output voltage is 2.8V and the output current equals 300 mA. The actual power dissipation of the regulator circuit can be determined using the equation: EQUATION 4-2: P D =  V IN – V OUT   I OUT + V IN  I GND DS20006578A-page 9 MIC5318 Because this device is CMOS and the ground current is typically