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LP3879

www.ti.com

SNVS396B –MAY 2006–REVISED APRIL 2013

LP3879 Micropower 800mA Low Noise "Ceramic Stable" Voltage Regulator for Low

Voltage Applications

Check for Samples: LP3879

FEATURES

DESCRIPTION

The LP3879 is a 800 mA fixed-output voltage

• Standard Output Voltage: 1.00V, 1.20V

regulator designed to provide high performance and

• Custom Voltages Available from 1.0V to 1.2V

low noise in applications requiring output voltages

(50 mV Increments)

between 1.0V and 1.2V.

• Input Voltage: 2.5 to 6V

Using an optimized VIP (Vertically Integrated PNP)

• 1% Initial Output Accuracy

process, the LP3879 delivers superior performance:

• Designed for Use with Low ESR Ceramic

Ground Pin Current: Typically 5.5 mA @ 800 mA

Capacitors

load, and 200 µA @ 100 µA load.

• Very Low Output Noise

Low Power Shutdown: The LP3879 draws less than

• Sense Option Improves Load Regulation

10 μA quiescent current when shutdown pin is pulled

• 8-Lead SO PowerPad and WSON Surface

low.

Mount Packages

Precision Output: Ensured output voltage accuracy

• <10 μA Quiescent Current in Shutdown

is 1% at room temperature.

• Low Ground Pin Current at all Loads

Low Noise: Broadband output noise is only 18 μV

• High Peak Current Capability

(typical) with 10 nF bypass capacitor.

• Over-Temperature/Over-Current Protection

• -40°C to +125°C Junction Temperature Range

APPLICATIONS

• ASIC Power Supplies In:

– Desktops, Notebooks and Graphic Cards

– Set Top Boxes, Printers and Copiers

• DSP and FPGA Power Supplies

• SMPS Post-Regulator

• Medical Instrumentation

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 (18 pages)

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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 LP3879 Micropower 800mA Low Noise "Ceramic Stable" Voltage Regulator for Low Voltage Applications Check for Samples: LP3879 FEATURES DESCRIPTION • • The LP3879 is a 800 mA fixed-output voltage regulator designed to provide high performance and low noise in applications requiring output voltages between 1.0V and 1.2V. 1 2 • • • • • • • • • • • Standard Output Voltage: 1.00V, 1.20V Custom Voltages Available from 1.0V to 1.
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LP3879 SNVS396B – MAY 2006 – REVISED APRIL 2013 www.ti.com Basic Application Circuit OUTPUT 6 *4.7 PF (Ceramic or Tantalum recommended) 4 1 5 + *0.01 PF (See App Hints) + - 2 N/C 7 N/C *10 PF (Ceramic recommended) 8 **S/D + LP3879-X.X 1.23V + 3 *Capacitance values shown are minimum required to assure stability. Larger output capacitor provides improved dynamic response. Output capacitor must meet ESR requirements (see Application Information).
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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 Absolute Maximum Ratings (1) (2) Storage Temperature Range −65°C to +150°C Operating Junction Temperature Range -40°C to +125°C Lead Temperature (Soldering, 5 seconds) 260°C ESD Rating (3) 2 kV Shutdown Pin 1kV Power Dissipation (4) Internally Limited −0.3V to +16V Input Supply Voltage (Survival) Input Supply Voltage (Typical Operating) 2.5V to +6V SENSE Pin −0.3V to +6V Output Voltage (Survival) (5) −0.
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LP3879 SNVS396B – MAY 2006 – REVISED APRIL 2013 www.ti.com Electrical Characteristics Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the temperature range of -40°C to 125°C. Limits are ensured through design, testing, or correlation. The limits are used to calculate the Average Outgoing Quality Level (AOQL). Unless otherwise specified: VIN = 3.0V, VOUT = 1V, IL = 1 mA, COUT = 10 µF, CIN = 4.7 µF, VS/D = 2V, CBYPASS = 10 nF.
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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 Typical Performance Characteristics Unless otherwise specified: VIN = 3.3V, VOUT = 1V, IL = 1 mA, CIN = 4.7 µF, COUT = 10 µF, VS/D = 2V, CBYP = 10 nF, TJ = 25°C. IGND vs Temperature Minimum VIN Over Temperature 10.0 9.0 8.0 IGND (mA) 7.0 IL = 800 mA 6.0 5.0 4.0 3.0 IL = 240 mA 2.0 1.0 IL = 1 mA 0 -60 -40 -20 0 20 40 60 80 100 120 140 TEMPERATURE (°C) Figure 3. Figure 4. IGND vs ILoad VOUT vs Temperature 1.020 1.015 VOUT (V) 1.010 1.
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LP3879 SNVS396B – MAY 2006 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified: VIN = 3.3V, VOUT = 1V, IL = 1 mA, CIN = 4.7 µF, COUT = 10 µF, VS/D = 2V, CBYP = 10 nF, TJ = 25°C. Ripple Rejection Line Transient Response 100 90 IL= 800 mA RIPPLE REJECTION (dB) 80 70 60 50 40 30 20 10 0 10 100 1k 10k 100k 1M FREQUENCY (Hz) 6 Figure 9. Figure 10. Line Transient Response Line Transient Response Figure 11. Figure 12.
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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 Typical Performance Characteristics (continued) Unless otherwise specified: VIN = 3.3V, VOUT = 1V, IL = 1 mA, CIN = 4.7 µF, COUT = 10 µF, VS/D = 2V, CBYP = 10 nF, TJ = 25°C. Line Transient Response Load Transient Response Figure 15. Figure 16. Load Transient Response Turn-On Characteristics 1.2 1 0o C VOUT (V) 0.8 0.6 25oC 0.4 125oC 0.2 0 0 0.5 1 1.5 2 VS/D Figure 17. Figure 18.
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LP3879 SNVS396B – MAY 2006 – REVISED APRIL 2013 www.ti.com Block Diagram SENSE BYPASS INPUT OUTPUT 6 1 4 5 Error Amp 2 N/C 8 SHUTDOWN 7 N/C + - LP3879-X.X 1.23V GROUND + 3 APPLICATION INFORMATION PACKAGE INFORMATION The LP3879 is offered in the 8-lead SO PowerPad or WSON surface mount packages to allow for increased power dissipation compared to the SO-8 and Mini SO-8. EXTERNAL CAPACITORS Like any low-dropout regulator, the LP3879 requires external capacitors for regulator stability.
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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 0.4 ESR (:) 0.3 0.2 STABLE REGION 0.1 0 0 200 400 600 800 LOAD CURRENT (mA) Figure 19. Stable Region For Output Capacitor ESR Important: The output capacitor must maintain its ESR within the stable region over the full operating temperature range of the application to assure stability.
PAGE 10
LP3879 SNVS396B – MAY 2006 – REVISED APRIL 2013 www.ti.com For these reasons, X7R and X5R type ceramic capacitors must be used on the input and output of the LP3879. SHUTDOWN INPUT OPERATION The LP3879 is shut off by pulling the Shutdown input low, and turned on by pulling it high. If this feature is not to be used, the Shutdown input should be tied to VIN to keep the regulator output on at all times.
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LP3879 www.ti.com SNVS396B – MAY 2006 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision A (April 2013) to Revision B • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 12
PACKAGE OPTION ADDENDUM www.ti.com 14-Feb-2014 PACKAGING INFORMATION Orderable Device Status (1) LP3879MR-1.0/NOPB Package Type Package Pins Package Drawing Qty Lead/Ball Finish MSL Peak Temp (2) (6) (3) Op Temp (°C) Device Marking (4/5) DDA 8 95 Green (RoHS & no Sb/Br) SN | CU SN Level-3-260C-168 HR 3879 MR1.0 SO PowerPAD DDA 8 95 TBD Call TI Call TI LP3879 MR1.2 LP3879MR-1.2/NOPB ACTIVE SO PowerPAD DDA 8 95 Green (RoHS & no Sb/Br) CU SN Level-3-260C-168 HR LP3879 MR1.
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PACKAGE OPTION ADDENDUM www.ti.com 14-Feb-2014 (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-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) W Pin1 (mm) Quadrant LP3879MRX-1.0/NOPB SO Power PAD DDA 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LP3879MRX-1.2/NOPB SO Power PAD DDA 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LP3879SD-1.0 WSON NGT 8 1000 178.0 12.4 4.3 4.3 1.3 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP3879MRX-1.0/NOPB SO PowerPAD DDA 8 2500 367.0 367.0 35.0 LP3879MRX-1.2/NOPB SO PowerPAD DDA 8 2500 367.0 367.0 35.0 LP3879SD-1.0 WSON NGT 8 1000 210.0 185.0 35.0 LP3879SD-1.0/NOPB WSON NGT 8 1000 210.0 185.0 35.0 LP3879SD-1.2/NOPB WSON NGT 8 1000 210.0 185.0 35.0 LP3879SDX-1.
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MECHANICAL DATA DDA0008B MRA08B (Rev B) www.ti.
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MECHANICAL DATA NGT0008A SDC08A (Rev A) www.ti.
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