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LP3981 Product Folder

Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator

Generic P/N 3981

General
Description

Package
& Models

Samples
& Pricing

Reliability
Metrics

Application
Notes

Parametric Table

Parametric Table

Temperature Min (deg C)	-40
Temperature Max (deg C)	125
Multiple Output Capability	No
On/Off Pin	Yes
Error Flag	No
InputMin Voltage (Volt)	2.70
InputMax Voltage (Volt)	6
Output Current (mA)	300

Dropout Voltage (Volt)	.1320
Quiescent Current (mA)	.07
SecondaryOutput Voltage (Volt)	-
SecondaryOutput Current (Amp)	-
RegType	LDO
Output Voltage (Volt)	2.50, 2.83, 3.03, 3.30, 2.70, 2.80
Watchdog	No

Datasheet

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator	339 Kbytes	3-Mar-03	View Online	Download	Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Package Availability, Models, Samples & Pricing

Part Number

Package

Status

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking

Type

Pins

MSL/Lead-Free Availability

Lead
Time

Qty

SPICE

IBIS

Qty

$US each

LP3981ILD-2.5

6

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXYTT
LO1UB

3-5 weeks

10000

LP3981ILD-2.83

6

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXYTT
LO1SB

3-5 weeks

10000

LP3981ILD-3.03

6

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXYTT
LO1YB

3-5 weeks

10000

LP3981ILD-3.3

6

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXYTT
LO1XB

4-6 weeks

20000

LP3981ILDX-2.5

6

Full production

N/A

N/A

1K+

$0.31

reel
of
4500

ZXYTT
LO1UB

3-5 weeks

10000

LP3981ILDX-2.83

6

Full production

N/A

N/A

1K+

$0.31

reel
of
4500

ZXYTT
LO1SB

3-5 weeks

15000

LP3981ILDX-3.03

6

Full production

N/A

N/A

1K+

$0.31

reel
of
4500

ZXYTT
LO1YB

3-5 weeks

10000

LP3981ILDX-3.3

6

Full production

N/A

N/A

1K+

$0.31

reel
of
4500

ZXYTT
LO1XB

4-6 weeks

10000

LP3981IMM-2.5

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LFKB

11-12 weeks

20000

LP3981IMM-2.7

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LFLB

11-12 weeks

20000

LP3981IMM-2.8

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LFTB

11-12 weeks

50000

LP3981IMM-2.83

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LDUB

11-12 weeks

50000

LP3981IMM-3.0

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LF3B

11-12 weeks

10000

LP3981IMM-3.03

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LFPB

11-12 weeks

50000

LP3981IMM-3.3

8

Full production

N/A

N/A

1K+

$0.31

reel
of
1000

ZXTT
LFNB

11-12 weeks

50000

LP3981IMMX-2.5

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LFKB

11-12 weeks

10000

LP3981IMMX-2.7

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LFLB

11-12 weeks

20000

LP3981IMMX-2.8

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LFTB

11-12 weeks

20000

LP3981IMMX-2.83

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LDUB

11-12 weeks

50000

LP3981IMMX-3.0

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LF3B

11-12 weeks

10000

LP3981IMMX-3.03

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LFPB

11-12 weeks

50000

LP3981IMMX-3.3

8

Full production

N/A

N/A

1K+

$0.31

reel
of
3500

ZXTT
LFNB

11-12 weeks

50000

LP3981I2.83 MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LP3981I3.03 MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LP3981I-3.3 MDC

Full production

N/A

N/A

tray
of
N/A

-

N/A

0

LP3981I-3.3 MWC

Full production

N/A

N/A

wafer jar
of
N/A

-

N/A

0

General Description

The LP3981's performance is optimized for battery powered systems to deliver ultra low noise, extremely low dropout voltage and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life.

Power supply rejection is better than 60 dB at low frequencies. This high power supply rejection is maintained down to lower input voltage levels common to battery operated circuits.

The device is ideal for mobile phone and similar battery powered wireless applications. It provides up to 300 mA, from a 2.5V to 6V input, consuming less than 1µA in disable mode.

The LP3981 is available in MSOP-8 package. For LP3981 in LLP-6 package, contact NSC sales offices. Performance is specified for -40°C to +125°C temperature range. The device available in the following output voltages; 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output options can be made available, please contact your local NSC sales office.

Features

Small, space saving MSOP-8
Low Thermal Resistance in LLP-6 package gives excellent power capability
Logic controlled enable
Stable with ceramic and high quality tantalum capacitors
Fast turn-on
Thermal shutdown and short-circuit current limit

Key Specification

2.5 to 6.0V input range
300mA guaranteed output
60dB PSRR at 1kHz
<=1µA quiescent current when shut down
Fast Turn-On time: 120 µs (typ.) with C_BYPASS = 0.01uF
132mV typ dropout with 300mA load
35µVrms output noise over 10Hz to 100kHz
-40 to +125°C junction temperature range for operation
2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs standard

Applications

CDMA cellular handsets
Wideband CDMA cellular handsets
GSM cellular handsets
Portable information appliances
Tiny 3.3V ± 5% to 2.5V, 300mA converter

Reliability Metrics

Part Number	Process	Early Failure Rate - Rejects	Sample Size (EFR)	PPM *	Rel. Rejects	Device Hours	Long Term Failure Rates (FITS)	MTTF
LP3981I-3.3 MDC	CMOS7	2	14200	141	0	800000	5	226190940
LP3981I-3.3 MWC	CMOS7	2	14200	141	0	800000	5	226190940
LP3981I2.83 MDC	CMOS7	2	14200	141	0	800000	5	226190940
LP3981I3.03 MDC	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILD-2.5	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILD-3.03	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILD-3.3	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILDX-2.5	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILDX-3.03	CMOS7	2	14200	141	0	800000	5	226190940
LP3981ILDX-3.3	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-2.5	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-2.7	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-2.8	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-2.83	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-3.0	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-3.03	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMM-3.3	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-2.5	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-2.7	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-2.8	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-2.83	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-3.0	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-3.03	CMOS7	2	14200	141	0	800000	5	226190940
LP3981IMMX-3.3	CMOS7	2	14200	141	0	800000	5	226190940

For more information on Reliablitity Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date	View Online	Download	Receive via Email
AN-1148: Application Note 1148 Linear Regulators: Theory of Operation and Compensation	200 Kbytes	25-Sep-02	View Online	Download	Receive via Email
AN-1187: Application Note 1187 Leadless Leadframe Package (LLP)	1463 Kbytes	26-Sep-03	View Online	Download	Receive via Email
Application Note 1187 Leadless Leadframe Package (LLP) (JAPANESE)	5326 Kbytes
UNDERSTANDING_INTERGRATED_CIRCUIT_PACKAGE_POWER_CA: Appendix E: Understanding Integrated Circuit Package Power Capabilities	563 Kbytes	19-Apr-00	View Online	Download	Receive via Email

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 15-Jan-2004]