LP3893ES-1.2/NOPB National Semiconductor, LP3893ES-1.2/NOPB Datasheet

IC REG LDO 3.0A 1.2V TO-263-5

LP3893ES-1.2/NOPB

Manufacturer Part Number
LP3893ES-1.2/NOPB
Description
IC REG LDO 3.0A 1.2V TO-263-5
Manufacturer
National Semiconductor
Datasheet

Specifications of LP3893ES-1.2/NOPB

Regulator Topology
Positive Fixed
Voltage - Output
1.2V
Voltage - Input
Up to 5.5V
Voltage - Dropout (typical)
0.27V @ 3A
Number Of Regulators
1
Current - Output
3A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-5, D²Pak (5 leads + Tab), TO-263BA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
*LP3893ES-1.2
*LP3893ES-1.2/NOPB
LP3893ES-1.2
© 2005 National Semiconductor Corporation
LP3893
3A Fast-Response Ultra Low Dropout Linear Regulators
General Description
The LP3893 is a high-current, fast-response regulator which
can maintain output voltage regulation with minimum input to
output voltage drop. Fabricated on a CMOS process, the
device operates from two input voltages: Vbias provides
voltage to drive the gate of the N-MOS power transistor,
while Vin is the input voltage which supplies power to the
load. The use of an external bias rail allows the part to
operate from ultra low Vin voltages. Unlike bipolar regula-
tors, the CMOS architecture consumes extremely low quies-
cent current at any output load current. The use of an
N-MOS power transistor results in wide bandwidth, yet mini-
mum external capacitance is required to maintain loop sta-
bility.
The fast transient response of these devices makes them
suitable for use in powering DSP, Microcontroller Core volt-
ages and Switch Mode Power Supply post regulators. The
parts are available in TO-220 and TO-263 packages.
Dropout Voltage: 270 mV (typ)
Ground Pin Current: 3 mA (typ) at full load.
Shutdown Current: 60 nA (typ) when S/D pin is low.
Precision Output Voltage: 1.5% room temperature accu-
racy.
Typical Application Circuit
At least 10 µF of input and output capacitance is required for stability.
*Tantalum capacitors are recommended. Aluminum electrolytic capacitors may be used for restricted temperature range. See application hints.
Connection Diagrams
TO-220, Top View
@
3A load current.
DS200697
20069702
Features
n Ultra low dropout voltage (270 mV
n Low ground pin current
n Load regulation of 0.04%/A
n 60 nA typical quiescent current in shutdown
n 1.5% output accuracy (25˚C)
n TO-220, TO-263 packages
n Over temperature/over current protection
n −40˚C to +125˚C junction temperature range
Applications
n DSP Power Supplies
n Server Core and I/O Supplies
n Linear Power Supplies for PC Add-in-Cards
n Set-Top Box Power Supplies
n Microprocessor Power Supplies
n High Efficiency Linear Power Supplies
n SMPS Post-Regulators
TO-263, Top View
20069701
@
3A typ)
www.national.com
20069703
June 2005

Related parts for LP3893ES-1.2/NOPB

LP3893ES-1.2/NOPB Summary of contents

Page 1

... At least 10 µF of input and output capacitance is required for stability. *Tantalum capacitors are recommended. Aluminum electrolytic capacitors may be used for restricted temperature range. See application hints. Connection Diagrams TO-220, Top View © 2005 National Semiconductor Corporation Features n Ultra low dropout voltage (270 mV n Low ground pin current n Load regulation of 0 ...

Page 2

... Ordering Information Order Number LP3893ES-1.2 LP3893ESX-1.2 LP3893ET-1.2 LP3893ES-1.5 LP3893ESX-1.5 LP3893ET-1.5 LP3893ES-1.8 LP3893ESX-1.8 LP3893ET-1.8 Block Diagram www.national.com Package Type Package Drawing TO263-5 TS5B TO263-5 TS5B TO220-5 T05D TO263-5 TS5B TO263-5 TS5B TO220-5 T05D TO263-5 TS5B TO263-5 TS5B TO220-5 T05D 2 Supplied As Rail Tape and Reel ...

Page 3

... 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 Lead Temp. (Soldering, 5 seconds) ESD Rating Human Body Model (Note 3) Machine Model (Note 10) Power Dissipation (Note 2) V Supply Voltage (Survival) ...

Page 4

Electrical Characteristics over the full operating temperature range. Unless otherwise specified =10 µ (Continued) OUT S/D BIAS Symbol Parameter AC Parameters PSRR (V ) Ripple Rejection for Voltage PSRR Ripple Rejection ...

Page 5

Typical Performance Characteristics µF, S/D pin is tied 2.2V, V BIAS GND SD DC Load Regulation Line Regulation vs V Unless otherwise specified 1.8V. OUT 20069705 20069707 BIAS 20069709 ...

Page 6

Typical Performance Characteristics µF, S/D pin is tied 2.2V, V BIAS Dropout Voltage LOAD Noise Measurement V Startup Waveform OUT www.national.com Unless otherwise specified 1.8V. (Continued) OUT 20069732 20069714 20069716 ...

Page 7

Typical Performance Characteristics µF, S/D pin is tied 2.2V, V BIAS IN Line Regulation PSRR IN V PSRR BIAS Unless otherwise specified 1.8V. (Continued) OUT BIAS 20069718 20069720 20069722 7 ...

Page 8

Application Hints EXTERNAL CAPACITORS To assure regulator stability, input and output capacitors are required as shown in the Typical Application Circuit. OUTPUT CAPACITOR At least 10µF of output capacitance is required for stability (the amount of capacitance can be increased ...

Page 9

Application Hints (Continued) HEATSINKING TO-263 PACKAGE The TO-263 package uses the copper plane on the PCB as a heatsink. The tab of these packages are soldered to the copper plane for heat sinking. The graph below shows a curve for ...

Page 10

Physical Dimensions TO220 5-lead, Molded, Stagger Bend Package (TO220-5) TO263 5-Lead, Molded, Surface Mount Package (TO263-5) www.national.com inches (millimeters) unless otherwise noted NS Package Number T05D NS Package Number TS5B 10 ...

Page 11

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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