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Table Of Contents

OUT

(C3) (C1)

(A1)

(A3)

LP3988

1 µF

Note: Pin numbers in

parentheses indicate

DSBGA package pin out

POWER

GOOD

(B2)

LP3988

www.ti.com

SNVS161D –OCTOBER 2001–REVISED MAY 2013

LP3988 Micropower, 150 mA Ultra Low-Dropout CMOS Voltage Regulator

With Power Good

Check for Samples: LP3988

FEATURES

DESCRIPTION

The LP3988 is a 150 mA low dropout regulator

• 5-Bump Thin DSBGA Package

designed specially to meet requirements of Portable

• SOT-23-5 Package

battery-applications. The LP3988 is designed to work

• Power-Good Flag Output

with a space-saving, small 1µF ceramic capacitor.

The LP3988 features an Error Flag output that

• Logic Controlled Enable

indicates a faulty output condition.

• Stable with Ceramic and High-Quality

The LP3988's performance is optimized for battery

Tantalum Capacitors

powered systems to deliver low noise, extremely low

• Fast Turn-On

dropout voltage and low quiescent current. Regulator

• Thermal Shutdown and Short-Circuit Current

ground current increases only slightly in dropout,

Limit

further prolonging the battery life.

Power supply rejection is better than 60 dB at low

KEY SPECIFICATIONS

frequencies and starts to roll off at 10 kHz. High

• Input range: 2.5V to 6V

power supply rejection is maintained down to lower

input voltage levels common to battery operated

• Ooutput current: 150 mA

circuits.

• PSRR at 10 kHz: 40 dB

The device is ideal for mobile phone and similar

• Quiescent current when shut down: ≤ 1µA

battery powered wireless applications. It provides up

• (Typical) Fast Turn-On time: 100 µs

to 150 mA, from a 2.5V to 6V input, consuming less

• Typical dropout with 150 mA load: 80 mV

than 1 µA in disable mode and has fast turn-on time

less than 200 µs.

• Junction temperature range for operation:

−40°C to +80°C

The LP3988 is available 5 pin SOT-23 package and

5-bump thin DSBGA package. Performance is

• Output voltages: 1.85V, 2.5V, 2.6V, 2.85V, 3V,

specified for −40°C to +125°C temperature range and

and 3.3V

is available in 1.85, 2.5, 2.6, 2.85, 3.0 and 3.3V

output voltages.

APPLICATIONS

• CDMA Cellular Handsets

• Wideband CDMA Cellular Handsets

• GSM Cellular Handsets

• Portable Information Appliances

• Tiny 3.3V ± 5% to 2.85V, 150 mA Converter

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 (19 pages)

PAGE 1
LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 LP3988 Micropower, 150 mA Ultra Low-Dropout CMOS Voltage Regulator With Power Good Check for Samples: LP3988 FEATURES DESCRIPTION • • • • • The LP3988 is a 150 mA low dropout regulator designed specially to meet requirements of Portable battery-applications. The LP3988 is designed to work with a space-saving, small 1µF ceramic capacitor. The LP3988 features an Error Flag output that indicates a faulty output condition.
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LP3988 SNVS161D – OCTOBER 2001 – REVISED MAY 2013 www.ti.com Block Diagram Pin Descriptions Name DSBGA SOT-23 VEN A1 3 Enable Input Logic, Enable High Function GND B2 2 Common Ground VOUT C1 5 Output Voltage of the LDO VIN C3 1 Input Voltage of the LDO Power Good A3 4 Power Good Flag (output): open-drain output, connected to an external pull-up resistor. Active low indicates an output voltage out of tolerance condition. Connection Diagrams VIN C3 POWER GOOD A3 A1 VEN Figure 1.
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LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 ABSOLUTE MAXIMUM RATINGS (1) (2) (3) −0.3 to 6.5V VIN −0.3V to (VIN+0.3V), with 6V max VOUT, VEN, PowerGood (applies only to DSBGA) Junction Temperature 150°C Storage Temperature −65°C to +150°C Lead Temp, Pad Temp.
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LP3988 SNVS161D – OCTOBER 2001 – REVISED MAY 2013 www.ti.com ELECTRICAL CHARACTERISTICS Unless otherwise specified: VEN = 1.8V, VIN = VOUT + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF. Typical values and limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C.
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LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified: VEN = 1.8V, VIN = VOUT + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF. Typical values and limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. (1) (2) Symbol Parameter Conditions Typ Limit Units Min Max 90 92 95 98 % 0.
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LP3988 SNVS161D – OCTOBER 2001 – REVISED MAY 2013 www.ti.com Figure 3. Power Good Flag Timing Figure 4. Line Transient response Input Perturbation Figure 5.
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LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 TYPICAL PERFORMANCE CHARACTERISTICS Unless otherwise specified, CIN = COUT = 1 µF Ceramic, VIN = VOUT + 0.2V, TA = 25°C, Enable pin is tied to VIN. Ripple Rejection Ratio (LP3988-2.6) Ripple Rejection Ratio (LM3988-2.6) Figure 6. Figure 7. Power-Good Response Time (LP3988-2.85) (flag pin pulled to VOUT through a 100KΩ resistor) Power-Good Response Time (LP3988-2.85) (flag pin pulled to VIN through a 100KΩ resistor) Figure 8. Figure 9.
PAGE 8
LP3988 SNVS161D – OCTOBER 2001 – REVISED MAY 2013 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) Unless otherwise specified, CIN = COUT = 1 µF Ceramic, VIN = VOUT + 0.2V, TA = 25°C, Enable pin is tied to VIN. 8 Line Transient Response (LP3988-2.85) Power-Up Response Figure 12. Figure 13. Enable Response Enable Response Figure 14. Figure 15. Load Transient Response Load Transient Response Figure 16. Figure 17.
PAGE 9
LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 APPLICATION INFORMATION External Capacitors Like any low-dropout regulator, the LP3988 requires external capacitors for regulator stability. The LP3988 is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance.
PAGE 10
LP3988 SNVS161D – OCTOBER 2001 – REVISED MAY 2013 www.ti.com On/Off Input Operation The LP3988 is turned off by pulling the VEN pin low, and turned on by pulling it high. If this feature is not used, the VEN pin should be tied to VIN to keep the regulator output on at all time. To assure proper operation, the signal source used to drive the VEN input must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH.
PAGE 11
LP3988 www.ti.com SNVS161D – OCTOBER 2001 – REVISED MAY 2013 REVISION HISTORY Changes from Revision C (May 2013) to Revision D • Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 12
PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-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) Device Marking (3) (4/5) LP3988IMF-2.5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LFSB LP3988IMF-3.0/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS & no Sb/Br) CU SN Level-1-260C-UNLIM -40 to 125 LFAB LP3988IMF-3.
PAGE 13
PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-2013 (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined.
PAGE 14
PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-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) LP3988IMF-2.5/NOPB SOT-23 DBV 5 1000 178.0 8.4 LP3988IMF-3.0/NOPB SOT-23 DBV 5 1000 178.0 LP3988IMF-3.3/NOPB SOT-23 DBV 5 1000 178.0 LP3988IMFX-2.5/NOPB SOT-23 DBV 5 3000 LP3988IMFX-2.85/NOPB SOT-23 DBV 5 LP3988IMFX-3.0/NOPB SOT-23 DBV LP3988IMFX-3.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LP3988IMF-2.5/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP3988IMF-3.0/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP3988IMF-3.3/NOPB SOT-23 DBV 5 1000 210.0 185.0 35.0 LP3988IMFX-2.5/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LP3988IMFX-2.85/NOPB SOT-23 DBV 5 3000 210.0 185.0 35.0 LP3988IMFX-3.
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MECHANICAL DATA YZR0005xxx D 0.600±0.075 E TLA05XXX (Rev C) D: Max = 1.502 mm, Min =1.441 mm E: Max = 1.045 mm, Min =0.984 mm 4215043/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.
PAGE 19
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.