LP3982IMM-ADJ/NOPB National Semiconductor, LP3982IMM-ADJ/NOPB Datasheet

IC REG LDO 300MA ADJ 8MSOP

LP3982IMM-ADJ/NOPB

Manufacturer Part Number
LP3982IMM-ADJ/NOPB
Description
IC REG LDO 300MA ADJ 8MSOP
Manufacturer
National Semiconductor
Datasheet

Specifications of LP3982IMM-ADJ/NOPB

Regulator Topology
Positive Adjustable
Voltage - Output
1.25 ~ 6 V
Voltage - Input
2.5 ~ 6 V
Voltage - Dropout (typical)
0.12V @ 300mA
Number Of Regulators
1
Current - Output
300mA (Min)
Current - Limit (min)
330mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
6 V
Output Voltage
1.25 V to 6 V
Output Type
Adjustable
Dropout Voltage (max)
0.22 V at 200 mA
Output Current
0.3 A
Line Regulation
0.01 %/V
Load Regulation
0.002 %/mA
Voltage Regulation Accuracy
+/- 2 %
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LP3982IMM-ADJ/NOPBTR

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© 2006 National Semiconductor Corporation
LP3982
Micropower, Ultra Low-Dropout, Low-Noise, 300mA
CMOS Regulator
General Description
The LP3982 low-dropout (LDO) CMOS linear regulator is
available in 1.8V, 2.5V, 2.77V, 2.82V, 3.0V, 3.3V, and adjust-
able versions. They deliver 300mA of output current. Pack-
aged in an 8-Pin MSOP, the LP3982 is pin and package
compatible with Maxim’s MAX8860. The LM3982 is also
available in the small footprint LLP package.
The LP3982 suits battery powered applications because of
its shutdown mode (1nA typ), low quiescent current (90µA
typ), and LDO voltage (120mV typ). The low dropout voltage
allows for more utilization of a battery’s available energy by
operating closer to its end-of-life voltage. The LP3982’s
PMOS output transistor consumes relatively no drive current
compared to PNP LDO regulators.
This PMOS regulator is stable with small ceramic capacitive
loads (2.2µF typ).
These devices also include regulation fault detection, a
bandgap voltage reference, constant current limiting and
thermal overload protection.
Application Circuit
DS200369
Features
n MAX8860 pin, package and spec. compatible
n LLP space saving package
n 300mA guaranteed output current
n 120mV typical dropout
n 90µA typical quiescent current
n 1nA typical shutdown mode
n 60dB typical PSRR
n 2.5V to 6V input range
n 120µs typical turn-on time
n Stable with small ceramic output capacitors
n 37µV RMS output voltage noise (10Hz to 100kHz)
n Over temperature/over current protection
n
Applications
n Wireless handsets
n DSP core power
n Battery powered electronics
n Portable information appliances
±
2% output voltage tolerance
20036931
@
300mA
www.national.com
March 2006

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LP3982IMM-ADJ/NOPB Summary of contents

Page 1

... These devices also include regulation fault detection, a bandgap voltage reference, constant current limiting and thermal overload protection. Application Circuit © 2006 National Semiconductor Corporation Features n MAX8860 pin, package and spec. compatible n LLP space saving package n 300mA guaranteed output current n 120mV typical dropout n 90µ ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications OUT SHDN SET CC V FAULT Fault Sink Current Power Dissipation Storage Temperature Range Junction Temperature ( Lead Temperature (10 sec.) Electrical Characteristics Unless otherwise specified, all limits guaranteed for 25˚ ...

Page 3

Electrical Characteristics Note 2: All voltages are with respect to the potential at the ground pin. Note 3: Maximum Power dissipation for the device is calculated using the following equations: where T is the maximum junction temperature, T J(MAX) package ...

Page 4

Typical Performance Characteristics 2.2µ 33nF 25˚ SHDN Dropout Voltage vs. Load Current (For Different Output Voltages) FAULT Detect Threshold vs. Load Current Supply Current vs. Load Current www.national.com Unless otherwise specified ...

Page 5

Typical Performance Characteristics 2.2µ 33nF 25˚ SHDN Output Noise Spectral Density Output Impedance vs. Frequency Load Transient Unless otherwise specified (Continued) IN 20036905 20036907 20036909 ...

Page 6

Typical Performance Characteristics 2.2µ 33nF 25˚ SHDN Power-Up Response Application Information GENERAL INFORMATION LP3982 is package, pin and performance compatible with Maxim’s MAX8860 excluding reverse battery protection and Dual Mode function (fixed and ...

Page 7

Application Information Similarity in the output capabilities exists between op amps and linear regulators. Just as rail-to-rail output op amps allow their output voltage to approach the supply voltage, low dropout regulators (LDOs) allow their output voltage to operate close ...

Page 8

Application Information FIGURE 4. Loop Gain Bode Plot Illustrating Inadequately High Zero for Stability Compensation The LP3982 generates an internal zero that makes up for the inadequately high zero of the low ESR ceramic output ca- pacitor. This internally generated ...

Page 9

Application Information FIGURE 5. Power on Delayed Reset Application The delay time for the application of Figure 5 is set as follows: The application is set for a reset delay time of 8.8ms. Note that the comparator should have high ...

Page 10

... Note: The SET pin is internally disconnected for the fixed versions. Ordering Information Package Part Number 8-Pin MSOP LP3982IMM-ADJ LP3982IMMX-ADJ LP3982IMM-1.8 LP3982IMMX-1.8 LP3982IMM-2.5 LP3982IMMX-2.5 LP3982IMM-2.77 LP3982IMMX-2.77 LP3982IMM-2.82 LP3982IMMX-2.82 LP3982IMM-3.0 LP3982IMMX-3.0 LP3982IMM-3.3 LP3982IMMX-3.3 8-Pin LLP LP3982ILD-1.8 LP3982ILDX-1.8 LP3982ILD-2.5 LP3982ILDX-2.5 LP3982ILD-2.77 LP3982ILDX-2.77 LP3982ILD-2.82 LP3982ILDX-2.82 LP3982ILD-3 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin MSOP NS Package Number MUA08A 8-Lead LLP Surface Mount NS Package Number LDA08C 11 www.national.com ...

Page 12

... 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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