Datasheet

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LP3991

OUT

1.0 PF

Gnd

Load

OUT

* For V

OUT

= 1.3V or less, C

OUT

may be reduced to 2.2 PF.

4.7 PF

LP3991

www.ti.com

SNVS296H –DECEMBER 2006–REVISED MAY 2013

LP3991 300mA Linear Voltage Regulator for Digital Applications

Check for Samples: LP3991

FEATURES

DESCRIPTION

Operating from a minimum input voltage of 1.65V, the

• Operation from 1.65V to 4.0V Input

LP3991 regulator has been designed to provide fixed

• 1% Accuracy at Room Temperature

stable output voltages for load currents up to 300mA.

• Output Voltage from 1.2V to 2.8V

This device is suitable where accurate, low voltages

are required from low input voltage sources and is

• 125mV Dropout at 300mA Load

therefore suitable for post regulation of switched

• 50µA Quiescent Current at 1mA Load

mode regulators. In such applications, significant

• Inrush Current Controlled to 600mA

improvements in performance and EMI can be

realized, with little reduction in overall efficiency. The

• PSRR 65dB at 1kHz

LP3991 will provide fixed outputs as low as 1.2V from

• 100µs Start-Up Time for 1.5V V

OUT

a wide input range of 1.65V to 4.0V Using the enable

• Stable with Ceramic Capacitors as Small as

pin, the device may be controlled to provide a

0402

shutdown state, in which negligible supply current is

drawn.

• Thermal-Overload and Short-Circuit Protection

The LP3991 is designed to be stable with space

APPLICATIONS

saving ceramic capacitors as small as 0402 case

size.

• Post DC/DC Regulator

• Battery Operated Devices Performance is specified for a -40°C to 125°C

junction temperature range.

• Hand-Held Information Appliances

For output voltage options please contact your local

PACKAGE

Texas Instruments sales office.

• 4 Pin DSBGA (0.963mm x 1.446mm)

Typical Application Circuit

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (21 pages)

PAGE 1
LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 LP3991 300mA Linear Voltage Regulator for Digital Applications Check for Samples: LP3991 FEATURES DESCRIPTION • • • • • • • • • Operating from a minimum input voltage of 1.65V, the LP3991 regulator has been designed to provide fixed stable output voltages for load currents up to 300mA.
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LP3991 SNVS296H – DECEMBER 2006 – REVISED MAY 2013 www.ti.com PIN DESCRIPTIONS Pin No. Symbol Name and Function B1 VOUT Voltage output. A Low ESR Ceramic Capacitor should be connected from this pin to GND. (See Application Information) Connect this output to the load circuit. A1 GND Common Ground. Connect to Pad. A2 VEN Enable Input; Enables the Regulator when ≥ 0.95V. Disables the Regulator when ≤ 0.4V. Enable Input has an internal 1.2MΩ pull-down resistor to GND.
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LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 Absolute Maximum Ratings (1) (2) (3) VIN, VOUT, Pins: Voltage to GND -0.3 to 6.5V VEN Pin: Voltage to GND -0.3 to (VIN + 0.3V) to 6.5V (max) Junction Temperature Lead/Pad Temperature (4) 150°C DSBGA 260°C Storage Temperature Continuous Power Dissipation (5) ESD (6) -65 to 150°C Internally Limited Human Body Model 2KV Machine Model (1) (2) (3) (4) (5) (6) 200V Absolute Maximum Ratings are limits beyond which damage can occur.
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LP3991 SNVS296H – DECEMBER 2006 – REVISED MAY 2013 www.ti.com Electrical Characteristics (1) Unless otherwise noted, VEN = 950mV, VIN = VOUT + 0.5V, or 1.8V, whichever is higher. CIN = 1µF, IOUT = 1.0mA, COUT = 4.7µF. Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125°C.
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LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 Electrical Characteristics(1) (continued) Unless otherwise noted, VEN = 950mV, VIN = VOUT + 0.5V, or 1.8V, whichever is higher. CIN = 1µF, IOUT = 1.0mA, COUT = 4.7µF. Typical values and limits appearing in normal type apply for TA = 25°C. Limits appearing in boldface type apply over the full junction temperature range for operation, −40 to +125°C.
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LP3991 SNVS296H – DECEMBER 2006 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics Unless otherwise specified, CIN = 1.0µF Ceramic, COUT = 4.7µF Ceramic, VIN = VOUT(NOM) + 0.5V or 1.8V whichever is greater, TA = 25°C, VOUT(NOM) = 1.5V , Shutdown pin is tied to VIN. 6 Output Voltage Change vs Temperature Output Voltage vs Minimum Input Voltage Figure 2. Figure 3. Ground Current vs Load Current Ground Current vs VIN. ILOAD = 1mA Figure 4. Figure 5.
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LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 Typical Performance Characteristics (continued) Unless otherwise specified, CIN = 1.0µF Ceramic, COUT = 4.7µF Ceramic, VIN = VOUT(NOM) + 0.5V or 1.8V whichever is greater, TA = 25°C, VOUT(NOM) = 1.5V , Shutdown pin is tied to VIN. Load Transient, VOUT = 1.5V Load Transient, VOUT = 1.2V Figure 8. Figure 9. Line Transient, ILOAD = 1mA Line Transient, ILOAD = 300mA Figure 10. Figure 11.
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LP3991 SNVS296H – DECEMBER 2006 – REVISED MAY 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, CIN = 1.0µF Ceramic, COUT = 4.7µF Ceramic, VIN = VOUT(NOM) + 0.5V or 1.8V whichever is greater, TA = 25°C, VOUT(NOM) = 1.5V , Shutdown pin is tied to VIN. Power Supply Rejection Ratio Power Supply Rejection Ratio Figure 14. Figure 15. Noise Density Figure 16.
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LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 APPLICATION INFORMATION EXTERNAL CAPACITORS In common with most regulators, the LP3991 requires external capacitors for regulator stability. The LP3991 is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance. INPUT CAPACITOR An input capacitor is required for stability. It is recommended that a 1.
PAGE 10
LP3991 www.ti.com CAP VALUE (% of NOM. 1 uF) SNVS296H – DECEMBER 2006 – REVISED MAY 2013 0603, 10V, X5R 100 80 60 0402, 6.3V, X5R 40 20 0 1.0 2.0 3.0 4.0 5.0 DC BIAS (V) Figure 17. Effect of DC bias on Capacitance Value. As an example Figure 17 shows a typical graph showing a comparison of capacitor case sizes in a Capacitance vs. DC Bias plot.
PAGE 11
LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 DSBGA MOUNTING The DSBGA package requires specific mounting techniques which are detailed in the Texas Instruments Application Note (AN-1112). Referring to the section Surface Mount Technology (SMT) Assenbly Considerations, it should be noted that the pad style which must be used with the 4 pin package is NSMD (non-solder mask defined) type.
PAGE 12
LP3991 SNVS296H – DECEMBER 2006 – REVISED MAY 2013 www.ti.com MAXIMUM SUPPLY VOLTAGE AND THERMAL CONSIDERATIONS Maximum recommended input voltage is 3.6V. The device may be operated at 4.0V VIN if proper care is given to the board design in regard to thermal dissipation. As a guide please refer to the following table for ambient temperature at 2 input voltages and 2 load currents for the example board types. θJA VIN VOUT IOUT PD Ambient Temp. 88ºC/W 3.6V 2.8V 160mA 0.130W 113ºC 250mA 0.
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LP3991 www.ti.com SNVS296H – DECEMBER 2006 – REVISED MAY 2013 REVISION HISTORY Changes from Revision G (May 2013) to Revision H • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.com 3-May-2013 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) (3) (4) LP3991TL-0.8/NOPB ACTIVE DSBGA YZR 4 250 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM LP3991TL-1.2/NOPB ACTIVE DSBGA YZR 4 250 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM -40 to 125 LP3991TL-1.
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PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 3-May-2013 Status (1) Package Type Package Pins Package Drawing Qty Eco Plan Lead/Ball Finish (2) MSL Peak Temp Op Temp (°C) (3) LP3991TLX-1.8/NOPB ACTIVE DSBGA YZR 4 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM LP3991TLX-2.0/NOPB ACTIVE DSBGA YZR 4 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM LP3991TLX-2.5/NOPB ACTIVE DSBGA YZR 4 3000 Green (RoHS & no Sb/Br) SNAGCU Level-1-260C-UNLIM LP3991TLX-2.
PAGE 16
PACKAGE OPTION ADDENDUM www.ti.com 3-May-2013 In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LP3991TL-0.8/NOPB DSBGA YZR 4 250 178.0 8.4 LP3991TL-1.2/NOPB DSBGA YZR 4 250 178.0 LP3991TL-1.3/NOPB DSBGA YZR 4 250 178.0 LP3991TL-1.5/NOPB DSBGA YZR 4 250 LP3991TL-1.55/NOPB DSBGA YZR 4 LP3991TL-1.7/NOPB DSBGA YZR LP3991TL-1.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) LP3991TLX-2.0/NOPB DSBGA YZR 4 3000 178.0 8.4 LP3991TLX-2.5/NOPB DSBGA YZR 4 3000 178.0 8.4 LP3991TLX-2.8/NOPB DSBGA YZR 4 3000 178.0 LP3991TLX-3.0/NOPB DSBGA YZR 4 3000 178.0 W Pin1 (mm) Quadrant 1.04 1.55 0.76 4.0 8.0 Q1 1.04 1.55 0.76 4.0 8.0 Q1 8.4 1.04 1.55 0.76 4.0 8.0 Q1 8.4 1.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP3991TLX-1.3/NOPB DSBGA YZR 4 3000 210.0 185.0 35.0 LP3991TLX-1.5/NOPB DSBGA YZR 4 3000 210.0 185.0 35.0 LP3991TLX-1.55/NOPB DSBGA YZR 4 3000 210.0 185.0 35.0 LP3991TLX-1.7/NOPB DSBGA YZR 4 3000 210.0 185.0 35.0 LP3991TLX-1.8/NOPB DSBGA YZR 4 3000 210.0 185.0 35.0 LP3991TLX-2.0/NOPB DSBGA YZR 4 3000 210.0 185.0 35.
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MECHANICAL DATA YZR0004xxx D 0.600±0.075 E TLA04XXX (Rev D) D: Max = 1.46 mm, Min = 1.4 mm E: Max = 0.99 mm, Min = 0.93 mm 4215042/A NOTES: A. All linear dimensions are in millimeters. Dimensioning and tolerancing per ASME Y14.5M-1994. B. This drawing is subject to change without notice. www.ti.
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