ST715 High input voltage, 85 mA LDO linear regulator Datasheet - production data Applications • Mobile phones • Personal digital assistant (PDAs) SOT23-5L • Cordless phones and similar battery-powered systems DFN8 (3x3 mm) Description The ST715 is a high voltage, ultra low quiescent current and low drop linear regulator capable of providing an output current in excess of 85 mA. SOT323-5L Features • 2.5 V to 24 V input voltage • Low-dropout voltage (500 mV typ. at 85 mA) • Very low quiescent current (3.8 µA typ. at full load) • 85 mA guaranteed output current • Output voltages available on request: from 1.2 V to 5.0 V with 100 mV step and adjustable The device operates over an input voltage range from 2.5 V to 24 V, and it is stable with output ceramic capacitors. Fault condition protection includes short-circuit current limitation. The ultra low quiescent current of 3.8 µA at full load makes it highly suitable for low power applications and battery-powered systems. The wide input voltage range makes the ST715 an ideal solution for low power industrial applications. The ST715 is available in SOT23-5, SOT323-5L or DFN8 (3x3 mm) 8 leads. • Compatible with ceramic output capacitors from 0.47 µF to 10 µF • Internal current limit • Packages: SOT23-5L, SOT323-5L and DFN8 (3x3 mm) • Temperature range: from -40 °C to 125 °C Table 1. Device summary Order codes Output voltage SOT23-5L Marking ST715MR SOT323-5L DFN8 (3x3 mm) Marking 71AD ST715PUR 715AD ADJ ST715M25R 7125 ST715PU25R 71525 2.5 V ST715M33R 7133 ST715PU33R 71533 3.3 V ST715C33R October 2014 This is information on a product in full production. Marking 733 DocID14414 Rev 11 1/24 www.st.com Contents ST715 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Output voltage selection for adjustable version . . . . . . . . . . . . . . . . . . 8 5.1 External capacitor requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5.2 Power dissipation and junction temperature . . . . . . . . . . . . . . . . . . . . . . . 8 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 9 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 DocID14414 Rev 11 ST715 1 Diagram Diagram Figure 1. Block diagram (fixed version) 9,1 9287 %LDV JHQHUDWRU &XUUHQW OLPLW 7KHUPDO SURWHFWLRQ 23$03 %DQGJDS UHIHUHQFH *1' Figure 2. Block diagram (adjustable version) 9287 9,1 %LDV JHQHUDWRU &XUUHQW OLPLW 7KHUPDO SURWHFWLRQ 23$03 %DQGJDS UHIHUHQFH )% *1' DocID14414 Rev 11 3/24 24 Pin configuration 2 ST715 Pin configuration Figure 3. Pin connection (top view) SOT23-5L/SOT323-5L DFN8 (3x3) Table 2. Pin description (DFN8 3x3 mm) Symbol Pin for fixed Pin for adjustable IN 1 1 NC 2, 3, 5, 6, 7, exp. pad 2, 3, 6, 7, exp. pad GND 4 4 Common ground FB - 5 Feedback pin OUT 8 8 Output voltage Name and function Input voltage Not internally connected Table 3. Pin description (SOT23-5L/SOT323-5L) 4/24 Symbol Pin for fixed Pin for adjustable IN 4 4 Input voltage NC 1, 3 3 Not internally connected GND 2 2 Common ground FB - 1 Feedback pin OUT 5 5 Output voltage Name and function DocID14414 Rev 11 ST715 Maximum ratings 3 Maximum ratings Table 4. Absolute maximum ratings Symbol VIN VOUT FB IOUT Parameter DC input voltage DC output voltage Value Unit From -0.3 to 26 V From -0.3 to VIN+0.3 V 4 V According to package power dissipation A Feedback pin Continuous output current Maximum power dissipation, DFN package 2 PD(1) Maximum power dissipation, SOT23-5L and SOT323-5L packages 0.45 TSTG Storage temperature range -65 to 150 °C TOP Operating junction temperature range -40 to 125 °C W 1. PD is based on an operating temperature of 25 °C or less. It must be derated according to the operating temperature. Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 5. Thermal data Symbol RthJA Parameter Thermal resistance junction-ambient SOT23-5L SOT323-5L DFN8 Unit 195 245 52 °C/W DocID14414 Rev 11 5/24 24 Electrical characteristics 4 ST715 Electrical characteristics TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = 0.1 µF, COUT = 1 µF, IOUT = 1 mA, unless otherwise specified.(1) Table 6. Electrical characteristics - adjustable version Symbol Parameter Test conditions VIN Operating input voltage IOUT = 85 mA IOUT Output current Min. 2.5 VIN = 2.5 to 6 V, TJ = -40 °C to 125 °C Feedback voltage VIN = VOUT + 1 to 24 V, IOUT =1 mA to 85 mA, TJ = -40 °C to 125 °C ΔVOUT Line regulation VIN = VOUT+1 to 24 V, IOUT = 1 mA, TJ = -40 °C to 125 °C ΔVOUT Load regulation IOUT = 1 mA to 85 mA, TJ = -40 °C to 125 °C eN SVR -4.0 VIN = VOUTNOM+1 V+/VRIPPLE, VRIPPLE = 0.2 V, Supply voltage rejection I OUT = 1 mA, COUT = 10 µF Quiescent current Unit 24 V 85 mA f = 1 kHz V 4.0 % 0.001 0.004 %/V 0.002 0.004 %/mA 95 µVRMS 200 Hz to 100 kHz, IOUT = 50 mA, Output noise voltage (2) COUT = 10 µF, TJ = -40 °C to 125 °C, VOUT = 1.2 V TJ = -40 °C to 125 °C IQ Max. 1.2 VFB accuracy(1) VFB Typ. 45 dB f = 100 kHz 62 IOUT = 0 mA to 85 mA, TJ = -40 °C to 125 °C 5.5 IOUT = 0 mA to 85 mA, VIN = 24 V TJ = -40 °C to 125 °C 6.5 ISC Short-circuit current VOUT = 0, TJ = -40 °C to 125 °C VIN = 3.8 V TON Turn-on time (3) VIN = 4.2 V, COUT = 10 µF, IOUT = 60 mA, TJ = -40 °C to 125 °C COUT Output capacitor Capacitance f = 100 kHz µA 120 mA 0.7 0.47 ms µF 1. For VOUT(NOM) < 2 V, VIN = 2.5 V. 2. Guaranteed by design. 3. Turn-on time is time measured between the input just exceeding 90% of its final value and the output voltage just reaching 95% of its nominal value. 6/24 DocID14414 Rev 11 ST715 Electrical characteristics TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = 0.1 µF, COUT = 1 µF, IOUT = 1 mA, VOUT = 3.3 V unless otherwise specified.(1) Table 7. Electrical characteristics - fixed version Symbol VIN Parameter Test conditions Min. Operating input voltage IOUT = 85 mA, TJ = -40 °C to 125 °C Typ. VOUT +VDRO Max. Unit 24 V PTYP IOUT Output current VIN = 4.3 to 24 V, TJ = -40 °C to 125 °C 0 85 mA VOUT VOUT total accuracy (1) VIN = VOUT+1 to 24 V, IOUT = 0 to 85 mA, TJ = -40 °C to 125 °C -5 +5 % ΔVOUT Line regulation VIN = 4.3 to 24 V, IOUT = 1 mA, TJ = -40 °C to 125 °C 0.001 0.004 %/V ΔVOUT Load regulation IOUT =100 µA to 85 mA, TJ = -40 °C to 125 °C 0.002 0.003 %/mA VDROP Dropout voltage(2) IOUT = 85 mA, TJ= -40 °C to 125 °C 500 1000 mV Output noise voltage(3) 200 Hz to 100 kHz, IOUT = 50 mA, COUT= 10 µF, TJ = -40 °C to 125 °C 210 µVRMS eN SVR VIN = VOUTNOM+1 V+/VRIPPLE, VRIPPLE = 0.2 V, Supply voltage rejection I OUT = 1 mA, COUT = 10 µF TJ = -40 °C to 125 °C IOUT=0 mA to 85 mA, TJ = -40 °C to 125 °C f = 1 kHz 38 dB f = 100 kHz IQ Quiescent current ISC Short-circuit current VOUT = 0, TJ =-40 °C to 125 °C VIN = 3.8 V TON Turn-on time (4) VIN = 4.2 V, COUT = 10 µF, IOUT = 60 mA, TJ = -40 °C to 125 °C COUT Output capacitor Capacitance f = 100 kHz 57 3.75 5.5 4.15 6.5 µA VIN=24 V 120 mA 0.7 0.47 ms µF 1. For VOUT(NOM) < 2 V, VIN = 2.5 V. 2. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification does not apply to output voltages below 2 V. 3. Guaranteed by design. 4. Turn-on time is time measured between the input just exceeding 90% of its final value and the output voltage just reaching 95% of its nominal value. DocID14414 Rev 11 7/24 24 Output voltage selection for adjustable version 5 ST715 Output voltage selection for adjustable version The ST715 features an adjustable output voltage due to two external resistors connected as a voltage divider to the FB pin as shown in Figure 4. The output voltage is set by the following equation: Equation 1 VOUT = VFB (1 + R1/R2) where typically VFB = 1.2 V. Choose R2 ≥ 5 kΩ to optimize the quiescent current, accuracy, and high-frequency power supply rejection. The resistor selection is given by the following equation: Equation 2 R1 = R2 x (VOUT/VFB - 1) 5.1 External capacitor requirements A 0.1 µF or a larger input bypass capacitor, connected between IN and GND and located close to the device, is recommended. In this manner, the transient response and noise rejection of the power supply, as a whole, improve. A higher value of the input capacitor may be necessary if large, fast-rise-time load transients are present in the application and if the device is several inches far from the power source. The ST715 requires an output capacitor connected between OUT and GND to stabilize the internal control loop. Any capacitor, (including ceramic and tantalum) with a value higher than 0.47 µF, stabilizes this loop. 5.2 Power dissipation and junction temperature For a reliable operation, junction temperature should not exceed 125 °C. This limits the power dissipation the regulator can handle in any application. To guarantee that the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the dissipation, PD, which must be less than or equal to PD(max). The maximum power dissipation limit is given by the following equation: Equation 3 PD(max) = (TJMAX - TA) / RthJA where: TJMAX is the maximum allowable junction temperature RthJA is the thermal resistance junction-to-ambient for the package TA is the ambient temperature The regulator dissipation is calculated by the following equation: 8/24 DocID14414 Rev 11 ST715 Output voltage selection for adjustable version Equation 4 PD = (VIN - VOUT) x IOUT Power dissipation coming from quiescent current is negligible. The ST715 features the internal current limit. During normal operation, it limits the output current to approximately 350 mA. When the current limit engages, the output voltage scales back linearly until the overcurrent condition ends. Do not exceed the power dissipation ratings of the package. DocID14414 Rev 11 9/24 24 Typical application 6 ST715 Typical application Figure 4. Application circuit for fixed version Figure 5. Application circuit for adjustable version 10/24 DocID14414 Rev 11 ST715 Typical performance characteristics 7 Typical performance characteristics Figure 6. Output voltage vs. temperature Figure 7. Output voltage vs. input voltage 3.5 3.45 3 IOUT=85mA 2.5 VOUT [V] 3.4 VOUT [V] 3.5 IOUT=1mA 3.35 3.3 2 1.5 1 3.25 0.5 3.2 VIN=VOUT(NOM)+1V 3.15 -50 0 50 100 VIN=VOUT(NOM)+1V 0 0 150 1 2 Temp [°C] 4 5 6 VIN [V] Figure 9. COUT stability region Figure 8. Dropout voltage vs. output current 1000 9,1 IUR IURP PWR WR 9,287 WR P$&,1 )7D & 87 P$WR (65# .+]>ȍ@ 800 VDROPOUT [V] 3 600 400 200 6WD WDELOL LOLW\DUHD HD 8QWHVWH WHVWHGDUHD HD 0 0 20 40 60 80 100 IOUT [A] *,3*07 Figure 10. Supply voltage rejection vs. frequency Output noise voltage vs. frequency 60 700 55 600 500 50 nV/√Hz] SVR [dB] &287>)@QRPLQDOYDOXH 45 40 400 300 200 35 IOUT=1mA, VRIPPLE=0.2VPP, VOUT=1.2V 30 100 1000 10000 100 IOUT=50mA, VIN=2.5V, VOUT=1.2V 100000 0 1000 10000 100000 Freq [Hz] Freq [Hz] DocID14414 Rev 11 11/24 24 Typical performance characteristics ST715 Figure 11. Quiescent current vs. input voltage Figure 12. Load transient 5 Iq [µA] 4 3 2 1 VIN=VINH, IOUT=1mA, VOUT=3.3V 0 0 5 10 15 20 25 VIN [V] CIN=COUT=1µF, VEN =VIN=24V IOUT=from 1mA to 85mA tR=tF=5µS Figure 13. Line transient Figure 14. Enable transient COUT=1µF; VIN=VEN=from 4.3 to 22V; IOUT=1mA; tR=tF=5µs 12/24 CIN= COUT=1µF, VEN=VIN=0 to 4.3V, IOUT=1mA DocID14414 Rev 11 ST715 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 15. SOT23-5L drawing BN DocID14414 Rev 11 13/24 24 Package mechanical data ST715 Table 8. SOT23-5L mechanical data mm Dim. Min. Typ. Max. A 0.90 1.45 A1 0 0.15 A2 0.90 1.30 b 0.30 0.50 c 2.09 0.20 D 2.95 E 1.60 e 0.95 H 2.80 L 0.30 0.60 q 0 8 Figure 16. SOT23-5L recommended footprint (dimensions in mm) BN 14/24 DocID14414 Rev 11 ST715 Package mechanical data Figure 17. SOT323-5L drawing BI DocID14414 Rev 11 15/24 24 Package mechanical data ST715 Table 9. SOT323-5L mechanical data mm Dim. Min. 16/24 Typ. Max. A 0.80 1.10 A1 0 0.10 A2 0.80 b 0.15 0.30 c 0.10 0.22 D 1.80 2 2.20 E 1.80 2.10 2.40 E1 1.15 1.25 1.35 0.90 e 0.65 e1 1.30 L 0.26 < 0° DocID14414 Rev 11 0.36 1 0.46 8° ST715 Package mechanical data Figure 18. DFN8 (3x3 mm) drawing @UZQF"@SFW$ DocID14414 Rev 11 17/24 24 Package mechanical data ST715 Table 10. DFN8 (3x3 mm) mechanical data mm Dim. Min. Typ. Max. A 0.80 0.90 1.00 A1 0 0.02 0.05 A3 0.20 b 0.25 0.30 0.35 D 2.85 3 3.15 D2 1.603 1.753 1.853 E 2.85 3 3.15 E2 1.345 1.495 1.595 e L 18/24 0.65 0.30 0.40 DocID14414 Rev 11 0.50 ST715 Package mechanical data Figure 19. DFN8 (3x3 mm) recommended footprint @UZQF"@SFW$ DocID14414 Rev 11 19/24 24 Packaging mechanical data 9 ST715 Packaging mechanical data Figure 20. Tape and reel SOT23-5L drawing 20/24 DocID14414 Rev 11 ST715 Packaging mechanical data Table 11. SOT23-5L tape and reel mechanical data mm Dim. Min. Typ. A Max. 180 C 12.8 D 20.2 N 60 13.0 T 13.2 14.4 Ao 3.13 3.23 3.33 Bo 3.07 3.17 3.27 Ko 1.27 1.37 1.47 Po 3.9 4.0 4.1 P 3.9 4.0 4.1 Table 12. SOT323-xL tape and reel mechanical data mm Dim. Min. Typ. Max. A 175 180 185 C 12.8 13 13.2 D 20.2 N 59.5 60 60.5 T 14.4 Ao 2.25 Bo 3.17 Ko 1.2 Po 3.9 4.0 4.1 P 3.9 4.0 4.2 DocID14414 Rev 11 21/24 24 Packaging mechanical data ST715 Table 13. DFN8 (3x3 mm) tape and reel mechanical data mm Dim. Min. Typ. A 180 C 12.8 D 20.2 N 60 13.2 T 22/24 Max. 14.4 Ao 3.3 Bo 3.3 Ko 1.1 Po 4 P 8 DocID14414 Rev 11 ST715 Revision history 10 Revision history Table 14. Document revision history Date Revision Changes 08-Feb-2008 1 Initial release. 19-Feb-2008 2 Modified: Features on page 1. 22-Sep-2008 3 Modified: DFN8 (3x3 mm) mechanical data10 on page 23. 26-Nov-2008 4 Modified: Section 5 on page 8. 24-Mar-2010 5 Modified: Table 4 on page 5. 24-Mar-2010 6 Modified: IQ max values Table 6 on page 6 and Table 7 on page 7. 20-May-2010 7 Modified: Table 2 and Table 3 on page 4. 28-Jan-2014 8 Part numbers ST715xx, ST715xx25, ST715xx33 changed to ST715. Added package DFN8 (3 x 3 mm). Updated the title, the features and the description in cover page. Updated Section 1: Diagram, Section 2: Pin configuration, Section 3: Maximum ratings, Section 4: Electrical characteristics and Section 8: Package mechanical data. Added Section 9: Packaging mechanical data. Minor text changes. 21-May-2014 9 Updated Section 8: Package mechanical data. Minor text changes. 26-Sep-2014 10 Updated Table 2: Pin description (DFN8 3x3 mm) and Table 3: Pin description (SOT23-5L/SOT323-5L). Updated Figure 9: COUT stability region. Minor text changes. 15-Oct-2014 11 Updated Table 6 on page 6 and Table 7 on page 7. Minor text changes. DocID14414 Rev 11 23/24 24 ST715 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2014 STMicroelectronics – All rights reserved 24/24 DocID14414 Rev 11