LP3995ILD-1.6 National Semiconductor, LP3995ILD-1.6 Datasheet

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LP3995ILD-1.6

Manufacturer Part Number
LP3995ILD-1.6
Description
Micropower 150mA CMOS Voltage Regulator with Active Shutdown
Manufacturer
National Semiconductor
Datasheet
© 2004 National Semiconductor Corporation
LP3995
Micropower 150mA CMOS Voltage Regulator with Active
Shutdown
General Description
The LP3995 linear regulator is designed to meet the require-
ments of portable battery-powered applications and will pro-
vide an accurate output voltage with low noise and low
quiescent current. Ideally suited for powering RF/Analog
devices, this device will also be used to meet more general
circuit needs in which a fast turn-off is essential.
For battery powered applications the low dropout and low
ground current provided by the device allows the lifetime of
the battery to be maximized. The Enable(/Disable) control
allows the system to further extend the battery lifetime by
reducing the power consumption to virtually zero.
The Enable(/Disable) function on the device incorporates an
active discharge circuit on the output for faster device shut-
down. Where the fast turn-off is not required the LP3999
linear regulator is recommended.
The LP3995 also features internal protection against short-
circuit currents and over-temperature conditions.
The LP3995 is designed to be stable with small 1.0 µF
ceramic capacitors. The small outline of the LP3995 micro
SMD package with the required ceramic capacitors can
realize a system application within minimal board area.
Performance is specified for a −40˚C to +125˚C temperature
range.
The device is available in micro SMD package and LLP
package. For other package options contact your local NSC
sales office.
The device is available in fixed output voltages in the ranges
1.5V to 3.3V. For availability, please contact your local NSC
sales office.
Typical Application Circuit
DS200349
Key Specifications
n 2.5V to 6.0V Input Range
n Accurate Output Voltage;
n 60 mV Typical Dropout with 150 mA Load
n Virtually Zero Quiescent Current when Disabled
n Low Output Voltage Noise
n Stable with a 1 µF Output Capacitor
n Guaranteed 150 mA Output Current
n Fast Turn-on; 30 µs (Typ.)
n Fast Turn-off; 175 µs (Typ.)
Features
n 5 pin micro SMD Package
n 6 pin LLP Package
n Stable with Ceramic Capacitor
n Logic Controlled Enable
n Fast Turn-on
n Active Disable for Fast Turn-off.
n Thermal-overload and Short-circuit Protection
n −40 to +125˚C Junction Temperature Range for
Applications
n GSM Portable Phones
n CDMA Cellular Handsets
n Wideband CDMA Cellular Handsets
n Bluetooth Devices
n Portable Information Appliances
Operation
±
75mV / 2%
20034901
www.national.com
August 2004

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LP3995ILD-1.6 Summary of contents

Page 1

... The device is available in fixed output voltages in the ranges 1.5V to 3.3V. For availability, please contact your local NSC sales office. Typical Application Circuit © 2004 National Semiconductor Corporation Key Specifications n 2.5V to 6.0V Input Range n Accurate Output Voltage Typical Dropout with 150 mA Load ...

Page 2

Block Diagram Pin Description 5 pin micro SMD and LLP - 6 Pin No. Symbol micro LLP SMD GND OUT BYPASS 5 N/C Pad ...

Page 3

Connection Diagrams (Continued) LLP- 6 Package (SOT23 Footprint) Top View See NS Package Number LDE06A 3 20034904 www.national.com ...

Page 4

... Units, Tape and LP3995ITL-1.5 LP3995ITL-1.6 LP3995ITL-1.8 LP3995ITL-1.9 LP3995ITL-2.1 LP3995ITL-2.5 LP3995ITL-2.8 LP3995ITL-3.0 For LLP- 6 Package LP3995 Supplied as 1000 Units, Tape and Reel 4500 Units, Tape and LP3995ILD-1.5 LP3995ILD-1.6 LP3995ILD-1.8 LP3995ILD-1.9 LP3995ILD-2.1 LP3995ILD-2.5 LP3995ILD-2.8 LP3995ILD-3.0 LP3995ILD-3.3 4 LP3995 Supplied as Package Marking Reel LP3995ITLX-1.5 LP3995ITLX-1 ...

Page 5

... Absolute Maximum Ratings (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage ( Output Voltage Enable Input Voltage Junction Temperature Lead/Pad Temperature (Note 5) micro SMD LLP Storage Temperature Continuous Power ...

Page 6

Electrical Characteristics Unless otherwise noted 1. and limits appearing in normal type apply for T range for operation, −40 to +125˚C. (Notes 14, 15) Symbol Parameter DEVICE OUTPUT: 2.5 ≤ V ≤ 3.3V OUT ∆V Output ...

Page 7

Electrical Characteristics Note 14: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production at T Statistical Quality Control methods. Operation over the temperature specification is guaranteed by correlating the electrical characteristics to process and temperature ...

Page 8

Typical Performance Characteristics = V + 1.0V 25˚C, Enable pin is tied to V OUT A Output Voltage Change vs Temperature Ground Current vs Load Current (2.8V V Ground Current vs V www.national.com Unless otherwise specified ...

Page 9

Typical Performance Characteristics = V + 1.0V 25˚C, Enable pin is tied to V OUT A Short Circuit Current Ripple Rejection (V OUT Enable Start-Up Time (V OUT Unless otherwise specified (Continued) IN Line Transient Response ...

Page 10

Typical Performance Characteristics = V + 1.0V 25˚C, Enable pin is tied to V OUT A Enable Start-Up Time (V Turn-Off Time (V OUT Load Transient Response (V www.national.com Unless otherwise specified (Continued 1.8V) ...

Page 11

Application Hints POWER DISSIPATION AND DEVICE OPERATION The permissible power dissipation for any package is a measure of the capability of the device to pass heat from the power source, the junctions of the IC, to the ultimate heat sink, ...

Page 12

... SMD MOUNTING The micro SMD package requires specific mounting tech- niques which are detailed in National Semiconductor Appli- cation Note AN-1112. Referring to the section Surface Mount Technology (SMT) Assembly Considerations, it should be noted that the pad style which must be used with the 5 pin package is NSMD (non-solder mask defined) type ...

Page 13

Physical Dimensions inches (millimeters) unless otherwise noted The dimensions for X1, X2 and X3 are given as: micro SMD, 5 Bump, Package (TLA05) NS Package Number TLA05ADA X1 = 1.006 +/− 0.03mm X2 = 1.438 +/− 0.03mm X3 = 0.600 ...

Page 14

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials 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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