ST715XX ST715XX25 ST715XX33 ST715MR ST715PUR 715AD ST715PU15R ST715PU18R

ST715XX25 - ST715XX33 High input voltage - 85 mA LDO linear regulator Features 2.5 V to 24 V input voltage Low dropout voltage

ST715XX ST715XX ST715XX25 ST715XX25 - ST715XX33 ST715XX33 High input voltage - 85 mA LDO linear regulator 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 voltage: fixed or adjustable Compatible with ceramic output capacitors from 0.47 µF to 10 µF Internal current limit Package DFN8 (3x3 mm), SOT23-5L Temperature range: -40 °C to 125 °C SOT23-5L DFN8 (3x3 mm) similar battery powered systems. The wide input voltage range makes the ST715xx an ideal solution for low power industrial applications also. The ST715xx is available in the DFN8 (3x3 mm) 8 leads or the SOT23-5. Description The ST715xx is a high voltage, ultra low quiescent low drop linear regulator capable of providing an output current in excess of 85 mA. The device operates over an input voltage range spanning from 2.5 V to 24 V, and is also 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. Typical applications are mobile phones, personal digital assistant (PDAs), cordless phones and Table 1. Device summary Order codes Output Voltage SOT23-5L Marking Marking 71AD ST715MR ST715MR DFN8 (3x3 mm) ST715PUR ST715PUR 715AD 715AD ADJ ST715PU15R ST715PU15R (1) 71515 1.5 V 7118 ST715PU18R ST715PU18R (1) 71518 1.8 V 7125 ST715PU25R ST715PU25R (1) 71525 2.5 V ST715M28R ST715M28R (1) 7128 (1) 71528 2.8 V ST715M33R ST715M33R (1) 7133 71533 3.3 V ST715M15R ST715M15R (1) ST715M18R ST715M18R (1) ST715M25R ST715M25R 7115 ST715PU28R ST715PU28R ST715PU33R ST715PU33R 1. Available on request. September 2008 Rev 3 1/18 www.st.com 18 Contents ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2/18 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 1 Diagram Figure 1. Diagram Block diagram 3/18 Pin configuration ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 2 Pin configuration Figure 2. Pin connections (top view) DFN8 (3x3) SOT23-5L Table 2. Pin description (DFN8 3x3 mm) Symbol Pin for fixed Pin for adjustable IN 1 1 NC 2, 3, 5, 7, Exp. pad GND 4 4 Common ground FB - 5 Feedback pin OUT 8 8 Output voltage Table 3. Name and function Input voltage of the LDO 2, 3, 6, 7, Exp. pad Not internally connected Pin description (SOT23-5L) Symbol Pin for fixed Pin for adjustable IN 4 4 Input voltage of the LDO NC 3 1, 3 Not internally connected GND 2 2 FB 1 OUT 5 4/18 Name and function Common ground Feedback pin 5 Output voltage ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Maximum ratings 3 Maximum ratings Table 4. Absolute maximum ratings Symbol Unit from -0.3 to 26 V DC output voltage From -0.3 to VIN+0.3 V According to package power dissipation Continuous output current SOT23-5 package VOUT Value Continuous output current DFN package VIN Parameter According to package power dissipation DC input voltage IOUT A PD ESD ratings ±2 Power dissipation DFN package VESD =5 Power dissipation SOT23-5 package kV =1 W TSTG Storage temperature range -65 to 150 °C TOP Operating junction temperature range -40 to 125 °C Note: Absolute maximum ratings are the 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 DFN8 Unit 255 52 °C/W 5/18 Electrical characteristics ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 4 Electrical characteristics Table 6. Electrical characteristics - adjustable version (TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = 0.1 µF, COUT = 1 µF, IOUT = 1 mA, unless otherwise specified) (Note 1) Symbol VIN Parameter Test conditions Min. Operating input voltage IOUT = 85mA Output voltage range Output current Unit V 1.2 IOUT Max. 24 2.5 VOUT Typ. VIN=2.5 to 6V, TJ=-40°C to 125°C 85 Feedback voltage VFB V 1.2 VFB accuracy (Note 1) VIN=VOUT+1 to 24V, IOUT =1mA to 85mA, TJ=-40°C to 125°C VOUT Line regulation VIN=VOUT+1 to 24V, IOUT=1mA, TJ=-40°C to 125°C VOUT Load regulation IOUT =1mA to 85mA, TJ=-40°C to 125°C Output noise voltage (Note 4) 200Hz to 100kHz, IOUT = 50mA, COUT= 10µF, TJ=-40°C to 125°C, VOUT=1.2V eN VIN=VOUTNOM+1V+/-VRIPPLE, VRIPPLE=0.2V, IOUT = 1mA, Supply voltage rejection C OUT= 10µF SVR TJ=-40°C to 125°C -4.0 V % 0.001 0.004 %/V 0.002 0.004 %/mA 95 f=1kHz 4.0 µVRMS 45 dB f=100kHz 62 IOUT=0mA to 85mA, TJ=-40°C to 125°C 4.5 IOUT=0mA to 85mA, VIN=24V TJ=-40°C to 125°C 5.5 IQ Quiescent current ISC Short circuit current VOUT=0, TJ=-40°C to 125°C VIN=3.8V TON Turn on time (Note 3) VIN =4.2V, COUT= 10µF, IOUT=60mA, TJ=-40°C to 125°C Output capacitor Capacitance f = 100kHz COUT Note: mA 120 mA 0.7 0.47 µA ms µF 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 for output voltages below 2 V. 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. 4 6/18 1 Guaranteed by design. ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Table 7. Electrical characteristics Electrical characteristics - fixed version (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) (Note 1) Symbol VIN Parameter Test conditions Min. Operating input voltage IOUT = 85mA, TJ=-40°C to 125°C Typ. Unit 24 VOUT +VDRO Max. V PTYP IOUT Output current VIN=4.3 to 24V, TJ=-40°C to 125°C 0 85 mA VOUT VOUT total accuracy (Note 1) VIN=VOUT+1 to 24V, IOUT=0 to 85mA, TJ=-40°C to 125°C -5 +5 % VOUT Line regulation VIN=4.3 to 24V, IOUT=1mA, TJ=-40°C to 125°C 0.001 0.004 %/V VOUT Load regulation IOUT =100µA to 85mA, TJ=-40°C to 125°C 0.002 0.003 %/mA VDROP Drop output voltage (Note 2) IOUT=85mA, TJ=-40°C to 125°C 500 1000 mV eN Output noise voltage (Note 4) 200Hz to 100kHz, IOUT = 50mA, COUT= 10µF, TJ=-40°C to 125°C 210 µVRMS VIN=VOUTNOM+1V+/-VRIPPLE, VRIPPLE=0.2V, IOUT=1mA, f=1kHz Supply voltage rejection C OUT= 10µF SVR TJ=-40°C to 125°C IOUT=0mA to 85mA, TJ=-40°C to 125°C 38 dB f=100kHz 57 3.75 IQ Quiescent current ISC Short circuit current VOUT=0, TJ=-40°C to 125°C VIN=3.8V TON Turn on time (Note 3) Output capacitor Capacitance f = 100kHz 4.15 VIN =4.2V, COUT= 10µF, IOUT=60mA, TJ=-40°C to 125°C COUT Note: 4.5 5.5 µA VIN=24V 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 for output voltages below 2 V. 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. 4 Guaranteed by design. 7/18 Output voltage selection for adjustable version 5 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Output voltage selection for adjustable version The ST715xx features an adjustable output voltage using two external resistors connected as a voltage divider to the FB pin as shown in the typical application circuit Figure 4. The output voltage is set using the following equation: VOUT = VFB (1 + R1/R2) where typically VFB = 1.2 V. Choose R2 5 k in order to optimize quiescent current, accuracy, and high-frequency power-supply rejection. To simplify resistor selection use the following equation: R1 = R2 x (VOUT/VFB - 1) 5.1 External capacitor requirements A 0.1 µF or larger input bypass capacitor, connected between IN and GND and located close to the device, is recommended to improve transient response and noise rejection of the power supply as a whole. A higher-value input capacitor may be necessary if large, fastrise-time load transients will be present in the application and if the device is located several inches away from the power source. The ST715xx 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 will properly stabilize this loop. 5.2 Power dissipation and junction temperature To ensure reliable operation, worst-case junction temperature should not exceed 125 °C. This restriction limits the power dissipation the regulator can handle in any given application. To ensure that the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or equal to PD(max). The maximum power dissipation limit is determined using the following equation: 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 using the following equation: PD = (VIN - VOUT) x IOUT Power dissipation resulting from quiescent current is negligible. The ST715xx features internal current limiting. During normal operation, it limits output current to approximately 350 mA. When current limiting engages, the output voltage scales back linearly until the overcurrent condition ends. Take care not to exceed the power dissipation ratings of the package. 8/18 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 6 Typical application Figure 3. Application circuit for fixed version Figure 4. Typical application Application circuit for adjustable version 9/18 Typical performance characteristics ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 7 Typical performance characteristics Figure 5. Output voltage vs temperature Figure 6. 3.5 3.5 IOUT=1mA 3.45 3 IOUT=85mA 2.5 VOUT [V] 3.4 VOUT [V] Output voltage vs input voltage 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 Dropout voltage vs output current Figure 8. 2.4 ESR @ 100 kHz [Ohm] 1000 VDROPOUT [V] 800 600 400 200 0 0 20 40 60 80 2.1 1.8 5 6 CIN=0.1µF, VIN=VEN=2.5 to 24V IOUT=1mA to 0.085A 0.9 STABILITY REGION 0.6 0.3 0 0.47 100 Supply voltage rejection vs frequency COUT stability region 1.2 1 4.7 COUT [µF] (nominal value) 10 Figure 10. Output noise voltage vs frequency 700 55 600 50 500 nV/Hz] 60 SVR [dB] 4 1.5 IOUT [A] Figure 9. 3 VIN [V] Temp [°C] Figure 7. 2 45 40 400 300 200 35 IOUT=1mA, VRIPPLE=0.2VPP, VOUT=1.2V 30 100 1000 10000 Freq [Hz] 10/18 100 IOUT=50mA, VIN=2.5V, VOUT=1.2V 100000 0 1000 10000 Freq [Hz] 100000 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Typical performance characteristics 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 CIN= COUT=1µF, VEN=VIN=0 to 4.3V, IOUT=1mA 11/18 Package mechanical data 8 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97 JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. 12/18 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Package mechanical data SOT23-5L mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. A 0.90 1.45 35.4 57.1 A1 0.00 0.10 0.0 3.9 A2 0.90 1.30 35.4 51.2 b 0.35 0.50 13.7 19.7 C 0.09 0.20 3.5 7.8 D 2.80 3.00 110.2 118.1 E 1.50 1.75 59.0 68.8 e 0.95 37.4 H 2.60 3.00 102.3 118.1 L 0.10 0.60 3.9 23.6 7049676D 7049676D 13/18 Package mechanical data ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 DFN8 (3x3 mm) mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. 0.80 0.90 1.00 31.5 35.4 39.4 A1 0.02 0.05 0.8 2.0 A3 0.20 A 7.9 b 0.25 0.30 0.35 9.8 11.8 13.8 D 2.85 3.00 3.15 112.2 118.1 124 D2 1.603 1.753 1.853 63.1 69 73 E 2.85 3.00 3.15 112.2 118.1 124 E2 1.345 1.495 1.595 53 58.9 62.8 e L 14/18 0.65 0.30 0.40 25.6 0.50 11.8 15.7 19.7 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Package mechanical data Tape & reel SOT23-xL mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 Max. 0.504 0.512 14.4 0.519 0.567 Ao 3.13 3.23 3.33 0.123 0.127 0.131 Bo 3.07 3.17 3.27 0.120 0.124 0.128 Ko 1.27 1.37 1.47 0.050 0.054 0.0.58 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 3.9 4.0 4.1 0.153 0.157 0.161 15/18 Package mechanical data ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Tape & reel QFNxx/DFNxx (3x3) mechanical data mm. inch. Dim. Min. Typ. A Max. Min. Typ. 180 13.2 7.087 C 12.8 D 20.2 0.795 N 60 2.362 T 0.504 0.519 14.4 0.567 Ao 3.3 0.130 Bo 3.3 0.130 Ko 1.1 0.043 Po 4 0.157 P 16/18 Max. 8 0.315 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 9 Revision history Table 8. Revision history 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 data on page 14. 17/18 ST715XX ST715XX - ST715XX25 ST715XX25 - ST715XX33 ST715XX33 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. 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