LP3986BL-2818

LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 LP3986 Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in DSBGA Package Check for Samples: LP3986 FEATURES DESCRIPTION • • The LP3986 is a 150 mA dual low dropout regulator designed for portable and wireless applications with demanding performance and board space requirements. 1 2 • • • • Miniature 8-I/O DSBGA Package Stable With 1µF Ceramic and High Quality Tantalum Output Capacitors Fast Turn-on Two Independent Regulators Logic Controlled Enable Over Current and Thermal Protection APPLICATIONS • • • • CDMA Cellular Handsets GSM Cellular Handsets Portable Information Appliances Portable Battery Applications The LP3986 is stable with a small 1 µF ±30% ceramic output capacitor requiring smallest possible board space. The LP3986's performance is optimized for battery powered systems to deliver ultra low noise, extremely low dropout voltage and low quiescent current independent of load current. Regulator ground current increases very slightly in dropout, further prolonging the battery life. Optional external bypass capacitor reduces the output noise further without slowing down the load transient response. Fast start-up time is achieved by utilizing a speed-up circuit that actively pre-charges the bypass capacitor. Power supply rejection is better than 60 dB at low frequencies and 55 dB at 10 kHz. High power supply rejection is maintained at low input voltage levels common to battery operated circuits. The LP3986 is available in a DSBGA package. Performance is specified for a −40°C to +125°C temperature range. For single LDO applications, please refer to the LP3985 datasheet. Table 1. Key Specifications Guaranteed output current per regulator VALUE UNIT 150 mA Typical quiescent current when both regulators in shutdown mode 1 nA Typical dropout voltage at 150 mA output current 60 mV Typical ground current 115 µA Typical output noise 40 µV Fast turn-on circuit Junction temperature 200 µs −40 to +125 °C 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2001–2013, Texas Instruments Incorporated LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 www.ti.com Typical Application Circuit Input 2.7V to 6.0V VOUT1 VIN CIN LP3986 EN1 VOUT2 EN2 1PF 1PF BYPASS CBYPASS* GND 0.01PF Block Diagram LP3986 VOUT2 VIN VOUT1 BYPASS Fast Turn On circuit Vreference 1.23V VEN2 VEN1 Over Current & Thermal Protection GND Pin Functions PIN DESCRIPTIONS (1) 2 Name DSBGA (1) VOUT2 A1 Output Voltage of the second LDO EN2 B1 Enable input for the second LDO BYPASS C1 Bypass capacitor for the bandgap GND C2 Common ground GND C3 Common ground EN1 B3 Enable input for the first LDO VOUT1 A3 Output Voltage of the first LDO VIN A2 Common input for both LDOs Function The pin numbering scheme for the DSBGA package was revised in April 2002 to conform to JEDEC standard. Only the pin numbers were revised. No changes to the physical location of the inputs/outputs were made. For reference purposes, the obsolete numbering scheme had VOUT2 as pin 1, EN2 as pin 2, BYPASS as pin 3, GND as pins 4 and 5, EN1 as pin 6, VOUT1 as pin 7, and VIN as pin 8. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 Connection Diagram 8 Bump DSBGA Package – Top View See Package Number YZR0008 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) (3) −0.3 to 6.5V VIN, VEN −0.3 to (VIN+0.3V) ≤ 6.5V VOUT Junction Temperature 150°C Storage Temperature −65°C to +150°C Pad Temp. (4) Maximum Power Dissipation 235°C (5) 364mW ESD Rating (6) Human Body Model Machine Model (1) (2) (3) (4) (5) (6) 2kV 200V Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see Electrical Characteristics. All voltages are with respect to the potential at the GND pin. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office / Distributors for availability and specifications. Additional information on pad temperature can be found in TI's AN-1112 application report (SNVA009). The Absolute Maximum power dissipation depends on the ambient temperature and can be calculated using the formula: PD = (TJ TA)/θJA,Where TJ is the junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. The 364mW rating appearing under Absolute Maximum Ratings results from substituting the Absolute Maximum junction temperature, 150°C, for TJ, 70°C for TA, and 220°C/W for θJA. More power can be dissipated safely at ambient temperatures below 70°C . Less power can be dissipated safely at ambient temperatures above 70°C. The Absolute Maximum power dissipation can be increased by 4.5mW for each degree below 70°C, and it must be derated by 4.5mW for each degree above 70°C. The human body model is 100pF discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 3 LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 Operating Ratings www.ti.com (1) (2) VIN 2.7 to 6V VEN 0 to (VIN+ 0.3V) ≤ 6V −40°C to +125°C Junction Temperature Thermal Resistance θJA 220°C/W Maximum Power Dissipation (1) (2) (3) (3) 250mW Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see Electrical Characteristics. All voltages are with respect to the potential at the GND pin. Like the Absolute Maximum power dissipation, the maximum power dissipation for operation depends on the ambient temperature. The 250mW rating appearing under Operating Ratings results from substituting the maximum junction temperature for operation, 125°C, for TJ, 70°C for TA, and 220°C/W for θJA into (1) above. More power can be dissipated at ambient temperatures below 70°C . Less power can be dissipated at ambient temperatures above 70°C. The maximum power dissipation for operation can be increased by 4.5mW for each degree below 70°C, and it must be derated by 4.5mW for each degree above 70°C. Electrical Characteristics Unless otherwise specified: VIN = VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF, CBYPASS = 0.01µF. Typical values and limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. (1) (2) Symbol ΔVOUT Parameter Conditions % of VOUT(nom) 0.092 0.128 %/V IOUT = 1mA to 150 mA 0.003 0.006 0.01 %/mA (4) Quiescent Current VIN = VOUT(nom) + 1V, IOUT = 150 mA (Figure 1) 1.5 VIN = 3.1V, f = 1 kHz, IOUT = 50 mA (Figure 2) 60 VIN = 3.1V, f = 10 kHz, IOUT = 50 mA (Figure 2) 50 Both Regulators ON VEN = 1.4V, IOUT = 0 mA 115 200 Both Regulators ON VEN = 1.4V, IOUT = 0 to 150 mA 220 320 One Regulator ON VEN = 1.4V IOUT = 0 mA 75 130 One Regulator ON VEN = 1.4V IOUT = 0 to 150 mA 130 200 0.001 2 4 2 100 VEN = 0.4V, Both Regulators OFF (shutdown) 4 2.5 3.0 0.006 IQ (5) −2.5 −3.0 VIN = (VOUT(nom) + 0.5V) to 6.0V, IOUT = 1 mA Power Supply Rejection Ratio (4) Max Line Regulation Error (3) PSRR (2) (3) Units Min IOUT = 1mA Output AC Line Regulation (1) Limit Output Voltage Tolerance Load Regulation Error ISC Typ Dropout Voltage (5) IOUT = 1 mA IOUT = 150 mA 0.4 60 Short Circuit Current Limit Output Grounded 600 mVP-P dB µA mV mA All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with TJ = 25°C or correlated using Statistical Quality Control (SQC) methods. All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control. The target output voltage, which is labeled VOUT(nom), is the desired voltage option. The output voltage changes slightly with line voltage. An increase in the line voltage results in a slight increase in the output voltage and vice versa. The output voltage changes slightly with load current. An increase in the load current results in a slight decrease in the output voltage and vice versa. Tested limit applies to Vout 's of 2.5V and greater. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100mV below its nominal value. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 Electrical Characteristics (continued) Unless otherwise specified: VIN = VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF, CBYPASS = 0.01µF. Typical values and limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. (1) (2) Symbol IOUT(PK) Parameter Peak Output Current (6) (7) Conditions Typ VOUT ≥ VOUT(nom) - 5% 500 Limit Min Max Units 300 mA TON Turn-On Time CBYPASS = 0.01 µF 200 µs en Output Noise Voltage BW = 10 Hz to 100 kHz, COUT = 1µF 40 µVrms ρn(1/f) Output Noise Density f = 120 Hz, COUT = 1µF 1 µV/√Hz IEN Maximum Input Current at EN VEN = 0.4 and VIN = 6V VIL Maximum Low Level Input Voltage at EN VIN = 2.7 to 6V VIH Minimum High Level Input Voltage at EN VIN = 2.7 to 6V Xtalk Crosstalk Rejection −60 −60 Input capacitance (8) If VOUT = 1.8V, VIN_MIN>= 2.9V COUT Capacitance (8) All VOUT > = 2.5V, If VOUT = 1.8V, VIN_MIN>= 2.9V (6) (7) (8) (9) See (9) V 1.4 ΔILoad2 = 150 mA at 1KHz rate ΔILoad1 = 1 mA ΔVOUT2/ΔVOUT1 CIN nA 0.4 ΔILoad1 = 150 mA at 1KHz rate ΔILoad2 = 1 mA ΔVOUT2/ΔVOUT1 All VOUT > = 2.5V, ESR ±10 V dB 1 µF 4.7 µF 1 22 µF 2.2 22 µF 5 500 mΩ IPEAK guaranteed for Vout 's of 2.5V and greater. Turn-on time is that between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal value. Range of capacitor values for which the device will remain stable. This electrical specification is guaranteed by design. Range of capacitor ESR values for which the device will remain stable. This electrical specification is guaranteed by design. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 5 LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 www.ti.com TEST SIGNALS Figure 1. Line Regulation Input Test Signal Figure 2. PSRR Input Test Signal 6 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, CIN= COUT 1µF Ceramic, C BP= 0.01µ F, VIN = VOUT + 0.5, TA= 25°C, both enable pins are tied to VIN Power Supply Rejection Ratio (CBP = 0.001µF) Power Supply Rejection Ratio (CBP = 0.01µF) Figure 3. Figure 4. Power Supply Rejection Ratio (CBP = 0.1µF) Output Noise Spectral Density Figure 5. Figure 6. Line Transient Response (CBP = 0.001µF) Line Transient Response (CBP = 0.01µF) Figure 7. Figure 8. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 7 LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN= COUT 1µF Ceramic, C BP= 0.01µ F, VIN = VOUT + 0.5, TA= 25°C, both enable pins are tied to VIN 8 Load Transient & Cross Talk (VIN = VOUT + 0.2V) Load Transient & Cross Talk (VIN = VOUT + 0.2V) Figure 9. Figure 10. Start-Up Time (CBP = 0.001, 0.01, 0.1µF) Enable Response ( VIN = 4.2V ) Figure 11. Figure 12. Enable Response (VIN = VOUT+ 0.2V) Enable Response Figure 13. Figure 14. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN= COUT 1µF Ceramic, C BP= 0.01µ F, VIN = VOUT + 0.5, TA= 25°C, both enable pins are tied to VIN Output Short Circuit Current at VIN = 6V Output Short Circuit Current at VIN = 3.3V Figure 15. Figure 16. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 9 LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 www.ti.com APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the LP3986 requires external capacitors for regulator stability. The LP3986 is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance. INPUT CAPACITOR An input capacitance of ≊ 1µF is required between the LP3986 input pin and ground (the amount of the capacitance may be increased without limit). This capacitor must be located a distance of not more than 1cm from the input pin and returned to a clean analog ground. Any good quality ceramic, tantalum, or film capacitor may be used at the input. Important: Tantalum capacitors can suffer catastrophic failures due to surge current when connected to a lowimpedance source of power (like a battery or a very large capacitor). If a tantalum capacitor is used at the input, it must be guaranteed by the manufacturer to have a surge current rating sufficient for the application. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be ≊ 1µF over the entire operating temperature range. OUTPUT CAPACITOR The LP3986 is designed specifically to work with very small ceramic output capacitors, any ceramic capacitor (temperature characteristics X7R, X5R, Z5U or Y5V) in 1 to 22 µF range with 5mΩ to 500mΩ ESR range is suitable in the LP3986 application circuit. It may also be possible to use tantalum or film capacitors at the output, but these are not as attractive for reasons of size and cost (see next section Capacitor Characteristics). The output capacitor must meet the requirement for minimum amount of capacitance and also have an ESR (Equivalent Series Resistance) value which is within a stable range. NO-LOAD STABILITY The LP3986 will remain stable and in regulation with no-load (other than the internal voltage divider). This is specially important in CMOS RAM keep-alive applications. CAPACITOR CHARACTERISTICS The LP3986 is designed to work with ceramic capacitors on the output to take advantage of the benefits they offer: for capacitance values in the range of 1µF to 4.7µF range, ceramic capacitors are the smallest, least expensive and have the lowest ESR values (which makes them best for eliminating high frequency noise). The ESR of a typical 1µF ceramic capacitor is in the range of 20 mΩ to 40 mΩ, which easily meets the ESR requirement for stability by the LP3986. The ceramic capacitor's capacitance can vary with temperature. The capacitor type X7R, which operates over a temperature range of -55°C to +125°C, will only vary the capacitance to within ±15%. Most large value ceramic capacitors (≊ 2.2µF) are manufactured with Z5U or Y5V temperature characteristics. Their capacitance can drop by more than 50% as the temperature goes from 25°C to 85°C. Therefore, X7R is recommended over Z5U and Y5 in applications where the ambient temperature will change significantly above or below 25°C. Tantalum capacitors are less desirable than ceramic for use as output capacitors because they are more expensive when comparing equivalent capacitance and voltage ratings in the 1µF to 4.7µF range. Another important consideration is that tantalum capacitors have higher ESR values than equivalent size ceramics. This means that while it may be possible to find a tantalum capacitor with an ESR value within the stable range, it would have to be larger in capacitance (which means bigger and more costly ) than a ceramic capacitor with the same ESR value. It should also be noted that the ESR of a typical tantalum will increase about 2:1 as the temperature goes from 25°C down to −40°C, so some guard band must be allowed. 10 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 LP3986 www.ti.com SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 NOISE BYPASS CAPACITOR Connecting a 0.01µF capacitor between the CBYPASS pin and ground significantly reduces noise on the regulator output. This cap is connected directly to a high impedance node in the band gap reference circuit. Any significant loading on this node will cause a change on the regulated output voltage. For this reason, DC leakage current through this pin must be kept as low as possible for best output voltage accuracy. The use of this 0.01µF bypass capacitor is strongly recommended to prevent overshoot on the output during start up. The types of capacitors best suited for the noise bypass capacitor are ceramic and film. High-quality ceramic capacitors with either NPO or COG dielectric typically have very low leakage. Polypropolene and polycarbonate film capacitors are available in small surface-mount packages and typically have extremely low leakage current. Unlike many other LDOs, addition of a noise reduction capacitor does not effect the transient response of the device. ON/OFF INPUT OPERATION The LP3986 is turned off by pulling the VEN pin low, and turned on by pulling it high. If this feature is not used, the VEN pin should be tied to VIN to keep the regulator output on at all times. To assure proper operation, the signal source used to drive the VEN input must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. FAST ON-TIME The LP3986 outputs are turned on after Vref voltage reaches its final value (1.23V nominal). To speed up this process, the noise reduction capacitor at the bypass pin is charged with an internal 70µA current source. The current source is turned off when the bandgap voltage reaches approximately 95% of its final value. The turn on time is determined by the time constant of the bypass capccitor. The smaller the capacitor value, the shorter the turn on time, but less noise gets reduced. As a result, turn on time and noise reduction need to be taken into design consideration when choosing the value of the bypass capacitor. DSBGA MOUNTING The DSBGA package requires specific mounting techniques which are detailed in TI's AN-1112 application report (SNVA009), in particular the section Surface Mount Assembly Considerations. For best results during assembly, alignment ordinals on the PC board may be used to facilitate placement of the DSBGA device. DSBGA LIGHT SENSITIVITY Exposing the DSBGA device to direct sunlight will cause misoperation of the device. Light sources such as halogen lamps can effect electrical performance if brought near to the device. The wavelengths which have most detrimental effect are reds and infra-reds, which means that the fluorescent lighting used inside most buildings has very little effect on performance. A DSBGA test board was brought to within 1cm of a fluorescent desk lamp and the effect on the regulated output voltage was negligible, showing a deviation of less than 0.1% from nominal. Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 11 LP3986 SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013 www.ti.com REVISION HISTORY Changes from Revision T (February 2013) to Revision U • 12 Page Changed layout of National Data Sheet to TI format .......................................................................................................... 11 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated Product Folder Links: LP3986 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) LP3986TL-2518/NOPB ACTIVE DSBGA YZR 8 250 RoHS & Green SNAGCU Level-1-260C-UNLIM D 30 LP3986TL-2525/NOPB ACTIVE DSBGA YZR 8 250 RoHS & Green SNAGCU Level-1-260C-UNLIM D 27 LP3986TL-2828/NOPB ACTIVE DSBGA YZR 8 250 RoHS & Green SNAGCU Level-1-260C-UNLIM -40 to 125 D 10 LP3986TL-3030/NOPB ACTIVE DSBGA YZR 8 250 RoHS & Green SNAGCU Level-1-260C-UNLIM -40 to 125 D 12 LP3986TLX285285/NOPB ACTIVE DSBGA YZR 8 3000 RoHS & Green SNAGCU Level-1-260C-UNLIM D 11 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of