Datasheet

ManualsBrandsST ManualsIntegrated Circuits (ICs)LDO Voltage Regulator 3.3V 500mA DFN6

This is information on a product in full production.

December 2019 DocID15470 Rev 5 1/28

LD39050

500 mA low quiescent current and low noise voltage regulator

Datasheet

production data

Features

• Input voltage from 1.5 to 5.5 V

• Ultra low-dropout voltage (200 mV typ. at 500

mA load)

• Very low quiescent current (20 µA typ. at no

load, 100 µA typ. at 500 mA load, 1 µA max. in

OFF mode)

• Very low noise without bypass capacitor

• Output voltage tolerance: ± 2.0% @ 25 °C

• 500 mA guaranteed output current

• Wide range of output voltages available on

request: 0.8 V to 4.5 V with 100 mV step and

adjustable from 0.8 V

• Logic-controlled electronic shutdown

• Compatible with ceramic capacitor C

OUT

= 1 µF

• Internal current and thermal limit

• Package DFN6 (3x3 mm) and DFN6 (2x2 mm)

• Temperature range: from -40 °C to 125 °C

Description

The LD39050 provides 500 mA maximum current

with an input voltage range from 1.5 V to 5.5 V

and a typical dropout voltage of 200 mV. Stability

is given by ceramic capacitors. The ultra low drop

voltage, low quiescent current and low noise

features make it suitable for low power battery-

powered applications. Power supply rejection is

65 dB at low frequencies and starts to roll off at 10

kHz. The enable logic control function puts the

LD39050 in shutdown mode allowing a total

current consumption lower than 1 µA. The device

also includes short-circuit constant current limiting

and thermal protection. Typical applications are

mobile phones, hard disks and battery-powered

systems.

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www.st.com

Summary of content (28 pages)

PAGE 1
LD39050 500 mA low quiescent current and low noise voltage regulator Datasheet - production data Description ')1 [ PP ')1 [ PP Features • Input voltage from 1.5 to 5.5 V • Ultra low-dropout voltage (200 mV typ. at 500 mA load) • Very low quiescent current (20 µA typ. at no load, 100 µA typ. at 500 mA load, 1 µA max. in OFF mode) The LD39050 provides 500 mA maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV.
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Contents LD39050 Contents 1 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 Typical performance characteristics .
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LD39050 1 Diagrams Diagrams Figure 1. Schematic diagram for the LD39050 (adjustable) IN PG Power-good signal IN BandGap reference Current limit OpAmp OUT Thermal protection ADJ EN Internal enable GND Figure 2.
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Pin configuration 2 LD39050 Pin configuration Figure 3. DFN6 (3x3 mm) pin connection (top view) EN VIN EN GND NC GND VOUT PG VIN ADJ VOUT PG LD39050 (adjustable version) LD39050 (fixed version) Figure 4.
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LD39050 Pin configuration Table 1. Pin description Pin n° for DFN6 (3x3 mm) Pin n° for DFN6 (2x2 mm) LD39050 (adjustable) LD39050 (fixed) LD39050 (adjustable) LD39050 (fixed) EN 1 1 2 2 Enable pin logic input: low = shutdown, high = active GND 2 2 3 3 Common ground PG 3 3 4 4 Power Good VOUT 4 4 5 5 Output voltage ADJ 5 - 6 - Adjustable pin VIN 6 6 1 1 Input voltage of the LDO N.C.
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Maximum ratings 3 LD39050 Maximum ratings Table 2. Absolute maximum ratings Symbol Value Unit -0.3 to 7 V DC output voltage -0.3 to VI + 0.3 (7 V max.) V EN Enable pin -0.3 to VI + 0.3 (7 V max.) V PG Power Good pin -0.
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LD39050 4 Electrical characteristics Electrical characteristics TJ = 25 °C, VIN = 1.8 V, CIN = COUT = 1 µF, IOUT = 10 mA, VEN = VIN, unless otherwise specified. Table 5.
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Electrical characteristics LD39050 Table 5. Electrical characteristics for the LD39050 (adjustable) (continued) Symbol Parameter Test conditions Min. Rising edge 0.92* VOUT Falling edge 0.8* VOUT Power Good output threshold PG Typ. Power Good output voltage low Isink = 6 mA open drain output Short-circuit current RL= 0 Enable input logic low VIN = 1.5 V to 5.5 V, 40 °C < TJ < 125 °C Enable input logic high VIN = 1.5 V to 5.
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LD39050 Electrical characteristics TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 µF, IOUT = 10 mA, VEN = VIN, unless otherwise specified. Table 6. Electrical characteristics for the LD39050 (fixed output) Symbol VIN VOUT ∆VOUT ∆VOUT Parameter Test conditions VOUT accuracy Static line regulation Transient line regulation (1) ∆VOUT Static load regulation ∆VOUT Transient load regulation (1) VDROP eN SVR Max. Unit 1.5 5.5 V VOUT >1.5 V, IOUT = 10 mA, TJ = 25 °C -2.0 2.0 VOUT >1.
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Electrical characteristics LD39050 Table 6. Electrical characteristics for the LD39050 (fixed output) (continued) Symbol Parameter Test conditions Min. Rising edge 0.92* VOUT Falling edge 0.8* VOUT Power Good output threshold PG Typ. Power Good output voltage low Isink = 6 mA open drain output Short-circuit current RL = 0 Enable input logic low VIN = 1.5 V to 5.5 V, - 40 °C < TJ < 125 °C Enable input logic high VIN = 1.5 V to 5.
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LD39050 5 Typical performance characteristics Typical performance characteristics Figure 6. VOUT accuracy 2.55 2.54 2.53 0.82 0.81 0.8 0.79 0.78 2.52 2.51 2.5 2.49 2.48 VOUT [V] VADJ [V] Figure 5. VADJ accuracy 0.85 0.84 0.83 0.77 0.76 0.75 2.47 2.46 2.45 VIN = 1.8 V IOUT = 10 mA VEN = VIN -50 -25 0 25 50 75 100 125 VIN = 3.
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Typical performance characteristics LD39050 Figure 11. Output voltage vs. input voltage Figure 12. Quiescent current vs. temperature (VOUT = 0.8 V) 0.9 0.7 125°C 0.6 85°C 0.5 55°C 0.4 25°C 0.3 0°C Iq [µA] VOUT [V] 0.8 100 90 80 70 60 - 25°C 0.2 0.1 - 40°C VEN = VIN, CIN = COUT = 1 µF; IOUT = 500 mA 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 No load 50 40 30 20 10 0 -50 IOUT = 0.5 A VIN = 1.8 V, VEN to VIN, CIN = 1 µF COUT = 1 µF, VOUT = 0.
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LD39050 Typical performance characteristics Figure 17. Line regulation (VOUT = 2.5 V) Figure 18. Supply voltage rejection vs. temperature (VOUT = 0.8 V, f = 1 kHz) 0.04 IOUT = 1 mA 0.03 IOUT = 100 mA 0.01 SVR [dB] Line [%/V] 0.02 0 -0.01 -0.02 -0.03 -0.04 -50 VIN = from 3.5 V to 5.5 V VOUT = 2.5 V VEN = VIN -25 0 25 50 T [°C] 75 100 125 150 100 90 80 70 60 50 40 30 20 10 0 -50 SVR [dB] SVR [dB] 70 60 50 40 30 VIN from 1.7 V to 1.9 V, VOUT = 0.8 V, VEN to VIN, IOUT = 100 mA, freq.
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Typical performance characteristics LD39050 Figure 23. Supply voltage rejection vs. frequency (VOUT = 2.5 V) AP - IOUT = 100mA 5.0 100 90 eN [uV/SQRT(Hz)] IOUT = 100 mA 60 50 40 30 20 10 0 10 20 30 40 50 60 Freq [kHz] 70 80 90 AP - IOUT = 1m AP - IOUT = 0A 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1.E+01 VIN from 2.9 V to 3.1 V, VEN to VIN, VOUT = 2.5 V, CIN = COUT = 1 µF 0 AP - IOUT = 10mA 4.5 4.0 IOUT = 10 mA 80 70 SVR [dB] Figure 24. Noise output voltage vs. frequency 100 1.E+02 1.
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LD39050 Typical performance characteristics Figure 29. Load transient (VOUT=2.5 V, IOUT from 0.1 A to 0.5 A) Figure 30. Line transient VOUT VOUT VIN IOUT VEN = VIN = 3.5 V, IOUT from 100 mA to 0.5 A, VOUT = 2.5 V, CIN = COUT = 1 µF VEN = VIN from 4.3 V to 4.8 V, IOUT = 10 mA, COUT = 1 µF, CIN = NO Figure 31. Start-up transient Figure 32. Enable transient VOUT VIN VOUT VEN VEN = VIN = from 0 V to 5.5 V, IOUT=10 mA, CIN = COUT = 1 µF, V OUT = 2.5 V VEN from 0 V to 2 V, VIN = 3.5 V, VOUT = 2.
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Application information 6 LD39050 Application information The LD39050 is an ultra low-dropout linear regulator. It provides up to 500 mA with a 200 mV dropout. The input voltage range is from 1.5 V to 5.5 V. The device is available in fixed and adjustable output versions. The regulator is equipped with internal protection circuitry, such as short-circuit current limiting and thermal protection. The regulator is designed to be stable with ceramic capacitors on the input and the output.
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LD39050 Application information Figure 36. Application schematic for adjustable version 9 9,,1 ,,1 &,1 ,1 9,1 ,1 ( (1 1 2) 2)) 21 21 /' ) *1' *1 3* 3* 928 287 $' $' - 928 287 5 &2 28 87 ) 5 Regarding to the adjustable version, the output voltage can be adjusted from 0.8 V up to the input voltage minus the voltage drop across the PMOS (dropout voltage), by connecting a resistor divider between the ADJ pin and the output, thus allowing the remote voltage sensing.
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Application information LD39050 TA is the ambient temperature; RthJA is the thermal resistance junction-to-ambient. 6.2 Enable function The LD39050 features an enable function. When the EN voltage is higher than 0.9 V the device is ON, and if it is lower than 0.4 V the device is OFF. In shutdown mode, consumption is lower than 1 µA. The EN pin does not have an internal pull-up, therefore it cannot be left floating if it is not used. 6.
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LD39050 7 Package information Package information 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 information 7.1 LD39050 DFN6 (3x3 mm) package information Figure 37.
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LD39050 Package information Table 7. DFN6 (3x3 mm) mechanical data mm Dim. Min. A 0.80 A1 0 Typ. 1 0.02 A3 0.05 0.20 b 0.23 D 2.90 D2 2.23 E 2.90 E2 1.50 0.45 3 3.10 2.50 3 3.10 1.75 e L Max. 0.95 0.30 0.40 0.50 Figure 38.
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Package information 7.2 LD39050 DFN6 (3x3 mm) packing information Figure 39.
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LD39050 Package information Figure 40. DFN6 (3x3 mm) reel outline B1 Table 8. DFN6 (3x3 mm) tape and reel mechanical data mm Dim. Min. Typ. Max. A0 3.20 3.30 3.40 B0 3.20 3.30 3.40 K0 1 1.10 1.
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Package information 7.3 LD39050 DFN6 (2x2 mm) package information Figure 41.
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LD39050 Package information Table 9. DFN6 (2x2 mm) mechanical data mm Dim. Min. Typ. Max. A 0.51 0.55 0.60 A1 0 0.02 0.05 b 0.18 0.25 0.30 D D2 2.00 1.30 1.45 E E2 2.00 0.85 1.00 e L 1.55 1.10 0.50 0.15 0.25 0.35 Figure 42.
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Ordering information 8 LD39050 Ordering information Table 10. Order code Order code Package Packing LD39050PUR LD39050PU25R Adjustable from 0.8 V DFN6 (3x3 mm) LD39050PU33R LD39050PV10R LD39050PVR 26/28 Output voltages 2.5 V Tape and reel DFN6 (2x2 mm) DocID15470 Rev 5 3.3 V 1.0 V Adjustable from 0.
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LD39050 9 Revision history Revision history Table 11. Document revision history Date Revision 11-Mar-2009 1 Initial release. 2 The part number LD39050xx changed to LD39050. Updated the title in cover page, Table 10: Order code, Section 1: Diagrams, Section 2: Pin configuration, Section 4: Electrical characteristics, Section 5: Typical performance characteristics, Section 6: Application information and Section 7: Package information. Deleted order code table. Added Section 9: Revision history.
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LD39050 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.