LP3878 NSC [National Semiconductor], LP3878 Datasheet

no-image

LP3878

Manufacturer Part Number
LP3878
Description
Micropower 800mA Low Noise Ceramic Stable Voltage Regulator for Low Voltage Applications Designed for Use with Very Low ESR Output Capacitors
Manufacturer
NSC [National Semiconductor]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP3878-ADJ
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
LP3878MR-ADJ
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP3878MR-ADJ
0
Company:
Part Number:
LP3878MR-ADJ
Quantity:
168
Company:
Part Number:
LP3878MR-ADJ
Quantity:
3
Company:
Part Number:
LP3878MR-ADJ
Quantity:
15
Part Number:
LP3878MR-ADJ/NOPB
Manufacturer:
NSC
Quantity:
4 149
Part Number:
LP3878MRX-ADJ
Manufacturer:
AMD
Quantity:
6 220
Part Number:
LP3878MRX-ADJ
Manufacturer:
TI/德州仪器
Quantity:
20 000
Part Number:
LP3878MRX-ADJ
Manufacturer:
TI
Quantity:
480
Part Number:
LP3878MRX-ADJ
0
Part Number:
LP3878MRX-ADJ/NOPB
Manufacturer:
TI/德州仪器
Quantity:
5 000
Part Number:
LP3878MRX-ADJ/NOPB
0
Part Number:
LP3878SD-1.0
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP3878SD-1.0
Manufacturer:
NS
Quantity:
12 219
Company:
Part Number:
LP3878SD-1.0
Quantity:
3 900
Part Number:
LP3878SD-1.0/NOPB
Manufacturer:
TI
Quantity:
3 938
Part Number:
LP3878SD-ADJ
Manufacturer:
NS/国半
Quantity:
20 000
Part Number:
LP3878SD-ADJ/NOPB
0
Company:
Part Number:
LP3878SD-ADJ/NOPB
Quantity:
18 000
© 2004 National Semiconductor Corporation
LP3878
Micropower 800mA Low Noise "Ceramic Stable" Voltage
Regulator for Low Voltage Applications
Designed for Use with Very Low ESR Output Capacitors
General Description
The LP3878 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.
Output noise can be reduced to 18µV (typical) by connecting
an external 10 nF capacitor to the bypass pin.
Using an optimized VIP
cess, the LP3878 delivers superior performance:
Ground Pin Current: Typically 5 mA
180 µA
Sleep Mode: The LP3878 draws less than 2.0 µA quiescent
current when shutdown pin is pulled low.
Precision Output: Guaranteed output voltage accuracy is
1% at room temperature.
Basic Application Circuit
*Capacitance values shown are minimum required to assure stability, but may be increased without limit. Larger output capacitor provides improved dynamic
response. Output capacitor must meet ESR requirements (see Application Hints).
**Shutdown must be actively terminated (see App. Hints). Tie to INPUT (Pin4) if not used.
VIP
is a trademark of National Semiconductor Corporation.
@
100 µA load.
(Vertically Integrated PNP) pro-
@
DS200868
800 mA load, and
Features
n Standard output voltage: 1.00V
n Custom voltages available from 1.0V to 1.2V (50 mV
n Input voltage: 2.2 to 6.0V
n 1% initial output accuracy
n Guaranteed 800 mA continuous output current
n Designed for use with low ESR ceramic capacitors
n Very low output noise with external capacitor
n Sense option improves load regulation
n 8 Lead LLP surface mount package
n
n Low ground pin current at all loads
n High peak current capability (1200 mA typical)
n Overtemperature/overcurrent protection
n 0˚C to +125˚C junction temperature range
Applications
n ASIC Power Supplies In:
n DSP and FPGA Power Supplies
n SMPS Post-Regulator
increments)
<
2.0 µA quiescent current in shutdown
- Desktops, Notebooks and Graphic Cards
- Set Top Boxes, Printers and Copiers
20086803
November 2004
www.national.com

Related parts for LP3878

LP3878 Summary of contents

Page 1

... LP3878 delivers superior performance: Ground Pin Current: Typically 180 µA 100 µA load. Sleep Mode: The LP3878 draws less than 2.0 µA quiescent current when shutdown pin is pulled low. Precision Output: Guaranteed output voltage accuracy room temperature. Basic Application Circuit *Capacitance values shown are minimum required to assure stability, but may be increased without limit ...

Page 2

Block Diagram www.national.com 20086801 2 ...

Page 3

... See NS Package Number SDC08A Grade Order Information STD LP3878SD-1.0 STD LP3878SDX-1.0 APPLICATION INFORMATION Optional low noise feature. A small value capacitor connected between BYPASS and GROUND lowers output noise voltage level (100pF - 10nF). DO NOT CONNECT. This pin is used for post package test and should be left floating ...

Page 4

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Storage Temperature Range Operating Junction Temperature Range Lead Temperature (Soldering, 5 seconds) ESD Rating (Note 2) Power Dissipation (Note ...

Page 5

... LLP package, refer to Application Note AN-1187. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP3878 output must be diode-clamped to ground. Note 5: The output PNP structure contains a diode between the V on this diode and may induce a latch-up mode which can damage the part (see Application Hints) ...

Page 6

Typical Performance Characteristics 10 µF, S/D is tied 3.3V Temperature OUT Turn-Off Characteristics Ripple Rejection www.national.com Unless otherwise specified mA 1.0V ...

Page 7

Typical Performance Characteristics µF, S/D is tied 3.3V mA MIN V Over Temperature IN Load Transient Response (1mA to 800mA) Line Transient Response Unless otherwise specified ...

Page 8

Typical Performance Characteristics µF, S/D is tied 3.3V Line Transient Response www.national.com Unless otherwise specified mA 1.0V (Continued) OUT BYP 20086860 8 = ...

Page 9

... Curves are provided which show the stable ESR range as a function of load current (see ESR graph below). Because an internal zero is built into the error amplifier, the LP3878 is stable with output capacitor ESR values down to zero ohms. Stable Region For Output Capacitor ESR ...

Page 10

... ON/OFF In any application where the output may be pulled above the input, an external Schottky diode must be connected from (cathode OUT reverse voltage across the LP3878 to 0.3V (see Absolute Maximum Ratings). 10 (and out the ground pin), which IN , anode limit the IN OUT ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and ...

Related keywords