Datasheet

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This is information on a product in full production.

January 2013 Doc ID 13205 Rev 5 1/18

STLQ50xx

50 mA, 3 µA supply current low drop linear regulator

Datasheet − production data

Features

■ 2.3 V to 12 V input voltage range

■ 50 mA maximum output current

■ 3 µA quiescent current

■ Available in 1.8 V, 2.5 V, 3.3 V, 5.0 V and

adjustable voltage

■ 200 mV dropout voltage at 25 mA output

current

■ Internal thermal protection

■ Available in SOT323-5L package, and SOT23-

5L package (upon request)

Applications

■ Portable/battery-powered equipment

■ Electronic sensors

■ Microcontroller power

■ Real-time clock backup power

Description

The STLQ50xx is a BiCMOS linear regulator

specifically designed for operating in

environments where very low power consumption

is required.

Its very low quiescent current (3 µA) results in

extended battery life, making the device suitable

for applications which have very long standby

time.

The PMOS pass element allows very good

dropout values (200 mV at 25 mA I

and 350 mV

at full load) without affecting the consumption

characteristics.

Housed in the very small SOT323-5L or SOT23-

5L, it meets space-saving requirements in

battery-powered equipment.

SOT23-5L

SOT323-5L

(available on request)

Table 1. Device summary

Part number

Order codes

Output voltage

SOT323-5L (T&R) SOT23-5L (T&R)

(1)

STLQ50XX18 STLQ50C18R STLQ50M18R Fixed V

= 1.8 V

STLQ50XX25 STLQ50C25R STLQ50M25R Fixed V

= 2.5 V

STLQ50XX33 STLQ50C33R STLQ50M33R Fixed V

= 3.3 V

STLQ50XX50 STLQ50C50R STLQ50M50R Fixed V

= 5.0 V

STLQ50 STLQ50C-R STLQ50M-R Adjustable

1. Available upon request.

www.st.com

Summary of content (18 pages)

PAGE 1
STLQ50xx 50 mA, 3 µA supply current low drop linear regulator Datasheet − production data Features ■ 2.3 V to 12 V input voltage range ■ 50 mA maximum output current ■ 3 µA quiescent current ■ Available in 1.8 V, 2.5 V, 3.3 V, 5.
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Contents STLQ50xx Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Typical application . . . . . . . . . .
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STLQ50xx Block diagram Figure 1. STLQ50xx block diagram Vout Vin Adjustable V bandgap 1.
PAGE 4
Pin configuration 2 STLQ50xx Pin configuration Figure 2. Pin connections (top view) OUT ADJ STLQ50 GND N/C Table 2.
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STLQ50xx 3 Maximum ratings Maximum ratings Table 3. Absolute maximum ratings Symbol Value Unit DC Input voltage -0.3 to +14 V VFB FB voltage -0.3 to +7 V ESD Human body model (all pins) ±2 kV Junction temperature -40 to 150 °C Storage temperature range -55 to 150 °C VI TJ TSTG Note: Parameter Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 4.
PAGE 6
Electrical characteristics 4 STLQ50xx Electrical characteristics VI = VO(NOM) +1 V or VI = 2.5 V if VO < 1.5 V; TA= -40 °C to 125 °C; IO = 1 mA; typical values are at TA = 25 °C, CO = 1 µF unless otherwise specified. Table 5. Symbol Electrical characteristics Parameter Test conditions VI Input voltage range IQ Quiescent current (measured on ground pin, fixed version) VO Typ. Max. IO = 20 mA 2.3 12 IO = 50 mA 2.5 12 Unit V VI = 5 V 3.5 5.0 VI = 12 V 4.1 6.
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STLQ50xx 5 Typical application Typical application Figure 3. Fixed versions: STLQ5018- STLQ5025- STLQ5033- STLQ5050 Figure 4.
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Typical characteristics STLQ50xx 6 Typical characteristics Figure 5. VO vs. TJ Figure 6. 1.84 2 1.8 1.6 1.82 VO [V] 1.8 VO [V] VO vs. VI 1.78 1.76 1.74 1.72 -50 VI=2.8V, IO=20mA -25 0 25 1.4 1.2 1 0.8 0.6 0.4 0.2 IO=50mA, VO=1.8V 0 50 75 100 0 125 1 2 3 Temp [°C] Figure 7. IQ vs. TJ Figure 8. 3.5 0.5 3.4 0.45 0.4 VDROP [V] Iq [µA] 3.3 3.2 3.1 3 2.9 -25 0 25 50 75 100 0.35 0.3 0.25 0.2 0.15 TA=25°C 0 125 0 10 20 Temp [°C] Figure 9. 0.
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STLQ50xx Typical characteristics Figure 11. S.V.R. vs. Freq. Figure 12. S.V.R. vs. IO 40 37 27 SVR [dB] SVR [dB] 38 36 34 VO=1.8V, IO=20mA 32 22 17 32 30 28 12 26 7 24 22 2 20 100 1000 10000 VO=1.8V, f=120Hz 100000 0 10 20 30 40 50 IO [mA] Frequency [Hz] Figure 13. Line transient response Figure 14. Load transient response IO=50mA; CO=10µF; VI=2.8V, VI rise/fall=5ms CO=1µF; VO=1.8V; VI=2.8V, Curr. rise/fall=1µs Figure 15. Short-circuit current Figure 16.
PAGE 10
Application information 7 STLQ50xx Application information The STLQ50xx is a BiCMOS linear regulator specifically designed for operating in environments with very low power consumption requirements. The very low quiescent current of 3 µA is obtained through the use of CMOS technology which makes the device suitable for application that have long standby time.
PAGE 11
STLQ50xx Application information TA is the ambient temperature; RthJA is the junction-to-ambient thermal resistance of the package (seeTable 4 thermal data). The power dissipation can be calculated simply as: Equation 4 PD = (VI - VO) x IO In every application condition, PD must be lower than PDMAX. 7.3 Protection The PMOS pass element has an internal diode with anode connected to VO and cathode to VI. In case VO > VI, the current will flow from output to input without limitation.
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Package mechanical data 8 STLQ50xx 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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STLQ50xx Package mechanical data SOT323-5L mechanical data mm. mils. Dim. Min. Typ. Max. Min. Typ. Max. A 0.80 1.10 31.5 43.3 A1 0.00 0.10 0.0 3.9 A2 0.80 1.00 31.5 39.4 b 0.15 0.30 5.9 11.8 C 0.10 0.18 3.9 7.1 D 1.80 2.20 70.9 86.6 E 1.80 2.40 70.9 94.5 E1 1.15 1.35 45.3 53.1 e 0.65 25.6 e1 1.3 51.2 L 0.10 0.30 Doc ID 13205 Rev 5 3.9 11.
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Package mechanical data STLQ50xx 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.
PAGE 15
STLQ50xx Package mechanical data Tape & reel SOT323-xL mechanical data mm. inch. Dim. Min. Typ. Max. Min. Typ. Max. A 175 180 185 6.889 7.086 7.283 C 12.8 13 13.2 0.504 0.512 0.519 D 20.2 N 59.5 0.795 60 T 60.5 2.362 14.4 0.567 Ao 2.25 0.088 Bo 2.7 0.106 Ko 1.2 0.047 Po 3.9 4 4.1 0.153 0.157 0.161 P 3.8 4 4.2 0.149 0.157 0.
PAGE 16
Package mechanical data STLQ50xx 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 16/18 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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STLQ50xx 9 Revision history Revision history Table 6. Document revision history Date Revision Changes 07-Feb-2007 1 Initial release. 13-Feb-2007 2 Typo in cover page 350 mA ==> 350 mV. 06-Jul-2007 3 Added part number. 14-Nov-2007 4 Added Table 1. 31-Jan-2013 5 – Modified line regulation test condition Table 5 on page 6. – Minor text changes throughout the document.
PAGE 18
STLQ50xx 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.