Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsST715M33R

June 2010 Doc ID 14414 Rev 7 1/19

ST715XX

ST715XX25, 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 (3 x 3 mm), SOT23-5L

■ Temperature range: -40 °C to 125 °C

Applications

■ Mobile phones

■ Personal digital assistant (PDAs)

■ Cordless phones and similar battery powered

systems

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. The

wide input voltage range makes the ST715xx an

ideal solution for low power industrial applications

also. The ST715xx is available in the DFN8 (3 x 3

mm) 8 leads or the SOT23-5.

DFN8 (3 x 3 mm)

SOT23-5L

Table 1. Device summary

Order codes

Output voltage

SOT23-5L Marking DFN8 (3 x 3 mm) Marking

ST715MR 71AD ST715PUR 715AD ADJ

ST715M15R

(1)

7115 ST715PU15R

(1)

71515 1.5 V

ST715M18R

(1)

7118 ST715PU18R

(1)

71518 1.8 V

ST715M25R 7125 ST715PU25R 71525 2.5 V

ST715M28R

(1)

7128 ST715PU28R

(1)

71528 2.8 V

ST715M33R 7133 ST715PU33R 71533 3.3 V

1. Available on request.

www.st.com

Summary of content (19 pages)

PAGE 1
ST715XX ST715XX25, 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.
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Contents ST715XX, ST715XX25, ST715XX33 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
ST715XX, ST715XX25, ST715XX33 1 Diagram Figure 1.
PAGE 4
Pin configuration ST715XX, ST715XX25, 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, 6, 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.
PAGE 5
ST715XX, ST715XX25, ST715XX33 Maximum ratings 3 Maximum ratings Table 4. Absolute maximum ratings Symbol VIN Parameter Unit from -0.3 to 26 V From -0.3 to VIN+0.
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Electrical characteristics 4 ST715XX, ST715XX25, ST715XX33 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. Symbol VIN Electrical characteristics - adjustable version Parameter Test conditions Min. Operating input voltage IOUT = 85mA 2.5 VOUT Output voltage range 1.
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ST715XX, ST715XX25, ST715XX33 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. Symbol VIN Electrical characteristics - fixed version Parameter Test conditions Min. Operating input voltage IOUT = 85mA, TJ=-40°C to 125°C Typ. VOUT +VDRO Max. Unit 24 V PTYP IOUT Output current VIN=4.
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Output voltage selection for adjustable version 5 ST715XX, ST715XX25, 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: Equation 1 VOUT = VFB (1 + R1/R2) where typically VFB = 1.2 V.
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ST715XX, ST715XX25, ST715XX33 Output voltage selection for adjustable version The regulator dissipation is calculated using the following equation: Equation 4 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.
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Typical application ST715XX, ST715XX25, ST715XX33 6 Typical application Figure 3. Application circuit for fixed version Figure 4.
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ST715XX, ST715XX25, ST715XX33 Typical performance characteristics 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.
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Typical performance characteristics ST715XX, ST715XX25, ST715XX33 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.
PAGE 13
ST715XX, ST715XX25, ST715XX33 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.
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Package mechanical data ST715XX, ST715XX25, ST715XX33 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.
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ST715XX, ST715XX25, ST715XX33 Package mechanical data 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 0.65 0.30 0.40 25.6 0.50 Doc ID 14414 Rev 7 11.8 15.7 19.
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Package mechanical data ST715XX, ST715XX25, ST715XX33 Tape & reel SOT23-xL mechanical data mm. inch. Dim. Min. Typ. A Min. Typ. 180 13.0 13.2 Max. 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 16/19 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.
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ST715XX, ST715XX25, ST715XX33 Package mechanical data 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 8 0.315 Doc ID 14414 Rev 7 Max.
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Revision history ST715XX, ST715XX25, ST715XX33 9 Revision history Table 8. Document revision history Date Revision 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 15. 26-Nov-2008 4 Modified: Section 5 on page 8. 24-Mar-2010 5 Modified: Table 4 on page 5. 20-May-2010 6 Modified: IQ max values Table 6 on page 6 and Table 7 on page 7. 24-Jun-2010 7 Modified: Table 2 and Table 3 on page 4.
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ST715XX, ST715XX25, 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.