LP3878-ADJ - Micropower 800mA Low Noise "Ceramic Stable" Adjustable Voltage Regulator for 1V to 5V Applications

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Reference Designs	Knowledge Base

Features

•	1.0V to 5.5V output
•	Designed for use with low ESR ceramic capacitors
•	Very low output noise
•	8 Lead PSOP and LLP surface mount package
•	<10 μA quiescent current in shutdown
•	Low ground pin current at all loads
•	Over-temperature/over-current protection
•	-40°C to +125°C operating junction temperature range

General Description

The LP3878-ADJ is an 800 mA adjustable output voltage regulator designed to provide high performance and low noise in applications requiring output voltages as low as 1.0V. More...

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

Typical Application

*click for larger image

Parameters Values

Output Current 800 mA

Output Min 1 Volt

Input Min Voltage 2.5 Volt

Input Max Voltage 16 Volt

Dropout Voltage 0.475 Volt

Adjustable Output Yes

Quiescent Current 0.18 mA

PSRR 60 dB

Voltage Noise (rms) 18 uV

On/Off Pin Yes

Error Flag No

RegType LDO

Temperature Min -40 deg C

Temperature Max 125 deg C

Output Voltage Undefined Volt

Output Max 5.5 Volt

Typical Performance

*click for larger image

Also Recommended

LP3879▲	Fixed Versions 1.0V And 1.2V
LP3881▲	Vin Down To 1.3V, Vout Down To 1.2V
LP38841▲	Vin Down To 1.05V, Vout Down To 0.56V
LP3891▲	Vin Down To 1.6V, Vout Down To 1.2V

Block Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LP3878-ADJ Micropower 800mA Low Noise "Ceramic Stable" Adjustable Voltage Regulator for 1V to 5V Applications	366 Kbytes	1-Jun-09	Download

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

SP16130CH4RB

Low IF Receiver Reference Design

Full production

N/A

CALL

N/A

SP16160CH1RBKIT

High-IF Sub-sampling Receiver Subsystem Reference Design

Preliminary

N/A

CALL

N/A

LP3878-ADJEVAL

Micropower 800mA Low Noise `Ceramic Stable` Adjustable Voltage Regulator for 1V to 5V Applications

Full production

N/A

$52.50

8 weeks

N/A

LP3878MR-ADJ

PSOP

NOPB
STD

3
3

260
260

RoHS

N/A

Full production

N/A

1K+

$0.85

rail
of
95

NSXYTT
3878
MRADJ

12 weeks

2000

LP3878MRX-ADJ

PSOP

NOPB
STD

3
3

260
260

RoHS

N/A

Full production

N/A

1K+

$0.85

reel
of
2500

NSXYTT
3878
MRADJ

6 weeks

10000

LP3878SD-ADJ

LLP

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$0.85

reel
of
1000

NS
UZXYTT
3878ADJ

8 weeks

7500

LP3878SDX-ADJ

LLP

NOPB

260

RoHS

N/A

Full production

N/A

1K+

$0.85

reel
of
4500

NS
UZXYTT
3878ADJ

8 weeks

N/A

General Description

The LP3878-ADJ is an 800 mA adjustable output voltage regulator designed to provide high performance and low noise in applications requiring output voltages as low as 1.0V.

Using an optimized VIP (Vertically Integrated PNP) process, the LP3878-ADJ delivers superior performance:

Ground Pin Current: Typically 5.5 mA @ 800 mA load, and 180 µA @ 100 µA load.

Low Power Shutdown: The LP3878-ADJ draws less than 10 μA quiescent current when shutdown pin is pulled low.

Precision Output: Guaranteed output voltage accuracy is 1% at room temperature.

Low Noise: Broadband output noise is only 18 μV (typical) with 10 nF bypass capacitor.

Reliability Metrics

Part Number	Process	EFR Sample Size	LTA Device Hours	FITS	MTTF (Hours)
LP3878MR-ADJ	VIP1+	24100	2785000	2	790251354
LP3878MRX-ADJ	VIP1+	24100	2785000	2	790251354
LP3878SD-ADJ	VIP1+	24100	2785000	2	790251354
LP3878SDX-ADJ	VIP1+	24100	2785000	2	790251354

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Reference Designs

•	RD-170 - Low IF Receiver Reference Design
•	RD-179 - High-IF Sub-sampling Receiver Subsystem

Application Notes

Title	Size in Kbytes	Date
AN-1409: Application Note 1409 LP3878-ADJ Evaluation Board	430 Kbytes	14-Oct-05	Download
AN-1409 (Chinese): Application Note 1409 LP3878-ADJ Evaluation Board	190 Kbytes

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

[Information as of 8-Nov-2009]