LP3962ES-3.3 National Semiconductor, LP3962ES-3.3 Datasheet

IC, LDO VOLT REG, 3.3V, 1.5A, TO-263-5

LP3962ES-3.3

Manufacturer Part Number
LP3962ES-3.3
Description
IC, LDO VOLT REG, 3.3V, 1.5A, TO-263-5
Manufacturer
National Semiconductor
Datasheet

Specifications of LP3962ES-3.3

Primary Input Voltage
7V
Output Voltage Fixed
3.3V
Dropout Voltage Vdo
380mV
No. Of Pins
5
Output Current
1.5A
Operating Temperature Range
-40°C To +125°C
Termination Type
SMD
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Part Number:
LP3962ES-3.3
Manufacturer:
NS
Quantity:
32
© 2006 National Semiconductor Corporation
LP3962/LP3965
1.5A Fast Ultra Low Dropout Linear Regulators
General Description
The LP3962/LP3965 series of fast ultra low-dropout linear
regulators operate from a +2.5V to +7.0V input supply. Wide
range of preset output voltage options are available. These
ultra low dropout linear regulators respond very fast to step
changes in load which makes them suitable for low voltage
microprocessor applications. The LP3962/LP3965 are de-
veloped on a CMOS process which allows low quiescent
current operation independent of output load current. This
CMOS process also allows the LP3962/LP3965 to operate
under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 38mV
at 150mA load current and 380mV at 1.5A load current.
Ground Pin Current: Typically 5mA at 1.5A load current.
Shutdown Mode: Typically 15µA quiescent current when
the shutdown pin is pulled low.
Error Flag: Error flag goes low when the output voltage
drops 10% below nominal value (for LP3962).
SENSE: Sense pin improves regulation at remote loads.
(For LP3965)
Precision Output Voltage: Multiple output voltage options
are available ranging from 1.2V to 5.0V and adjustable
(LP3965), with a guaranteed accuracy of
temperature, and
load, and temperature).
Typical Application Circuits
*SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications
section for more information.
** See Application Hints.
±
3.0% over all conditions (varying line,
DS101266
±
1.5% at room
Features
n Ultra low dropout voltage
n Low ground pin current
n Load regulation of 0.04%
n 15µA quiescent current in shutdown mode
n Guaranteed output current of 1.5A DC
n Available in SOT-223,TO-263 and TO-220 packages
n Output voltage accuracy
n Error flag indicates output status (LP3962)
n Sense option improves better load regulation (LP3965)
n Extremely low output capacitor requirements
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Microprocessor power supplies
n GTL, GTL+, BTL, and SSTL bus terminators
n Power supplies for DSPs
n SCSI terminator
n Post regulators
n High efficiency linear regulators
n Battery chargers
n Other battery powered applications
±
1.5%
September 2006
www.national.com
10126601

LP3962ES-3.3 Summary of contents

Page 1

... ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints. © 2006 National Semiconductor Corporation Features n Ultra low dropout voltage n Low ground pin current n Load regulation of 0.04% n 15µ ...

Page 2

Typical Application Circuits *SD and ERROR pins must be pulled high through a 10kΩ pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications section for more information. ** See Application Hints. Block Diagram ...

Page 3

Block Diagram LP3965 Block Diagram LP3965-ADJ 10126629 10126635 3 www.national.com ...

Page 4

Connection Diagrams 10126604 Top View SOT 223-5 Package Pin Descriptions for SOT223-5 Package Pin # Name OUT 4 ERROR 5 GND Pin Descriptions for TO220-5 and TO263-5 Packages Pin # Name 1 SD ...

Page 5

... Reel LBRB 1000 units on Tape and Reel LBRB 2000 units on Tape and Reel LP3962ES-5.0 Rail LP3962ESX-5.0 Tape and Reel LP3962ES-3.3 Rail LP3962ES-3.3 Tape and Reel LP3962ES-2.5 Rail LP3962ES-2.5 Tape and Reel LP3962ES-1.8 Rail LP3962ES-1.8 Tape and Reel LP3965ES-5.0 Rail LP3965ES-5.0 Tape and Reel LP3965ES-3 ...

Page 6

Ordering Information TABLE 1. Package Marking and Ordering Information (Continued) Output Voltage Order Number 2.5 LP3965ESX-2.5 1.8 LP3965ES-1.8 1.8 LP3965ESX-1.8 ADJ LP3965ES-ADJ ADJ LP3965ESX-ADJ 5.0 LP3962ET-5.0 3.3 LP3962ET-3.3 2.5 LP3962ET-2.5 1.8 LP3962ET-1.8 5.0 LP3965ET-5.0 3.3 LP3965ET-3.3 2.5 LP3965ET-2.5 1.8 LP3965ET-1.8 ...

Page 7

... 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 Temperature (Soldering, 5 sec.) ESD Rating (Note 3) Power Dissipation (Note 2) Input Supply Voltage (Survival) Shutdown Input Voltage (Survival) ...

Page 8

Electrical Characteristics LP3962/LP3965 (Continued) Limits in standard typeface are for T Unless otherwise specified Symbol Parameter T Turn-off delay dOFF T Turn-on delay dON I SD Input Current SD ERROR FLAG COMPARATOR V Threshold T V ...

Page 9

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN Drop-Out Voltage vs Temperature for Different Load Currents Ground Pin Current vs Input Voltage (V Ground Current vs Temperature (V Unless otherwise specified, V ...

Page 10

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN Ground Pin Current vs Shutdown Pin Voltage Output Noise Density, V Load Transient Response www.national.com Unless otherwise specified and T ...

Page 11

Typical Performance Characteristics C = 33µ 10mA 68µF, V OUT OUT IN δV vs Temperature OUT Line Transient Response Line Transient Response (I Unless otherwise specified and T = 25˚C. (Continued) SD ...

Page 12

Applications Information EXTERNAL CAPACITORS Like any low-dropout regulator, external capacitors are re- quired to assure stability. these capacitors must be correctly selected for proper performance. INPUT CAPACITOR: The LP3962/5 requires a low source impedance to maintain regulator stability because the ...

Page 13

Applications Information the LP396X. Derating must be applied to the manufacturer’s ESR specification, since it is typically only valid at room temperature. Any applications using aluminum electrolytics should be thoroughly tested at the lowest ambient operating tempera- ture where ESR ...

Page 14

Applications Information Once the power pass element shuts down, the control loop will rapidly cycle the output on and off until the average power dissipation causes the thermal shutdown circuit to respond to servo the on/off cycling to a lower ...

Page 15

Applications Information FIGURE 2. Improving remote load regulation using LP3965 SHUTDOWN OPERATION A CMOS Logic level signal at the shutdown ( SD) pin will turn-off the regulator. Pin SD must be actively terminated through a 10kΩ pull-up resistor for a ...

Page 16

Applications Information HEATSINKING TO-263 AND SOT-223 PACKAGES The TO-263 and SOT223 packages use the copper plane on the PCB as a heatsink. The tab of these packages are soldered to the copper plane for heat sinking. Figure 3 shows a ...

Page 17

Applications Information FIGURE 8. SCENARIO C, θ JA FIGURE 9. SCENARIO D, θ JA (Continued) 10126622 = 92˚C/W FIGURE 10. SCENARIO E, θ 10126623 = 83˚C/W FIGURE 11. SCENARIO F, θ 17 10126624 = 77˚C/W JA 10126625 = 75˚C/W JA ...

Page 18

FIGURE 12. SCENARIO G, θ = 113˚C/W JA FIGURE 13. SCENARIO H, θ = 79˚C 10126626 10126627 ...

Page 19

Applications Information (Continued) FIGURE 14. SCENARIO I, θ = 78.5˚C 10126628 www.national.com ...

Page 20

Physical Dimensions TO220 5-lead, Molded, Stagger Bend Package (TO220-5) For Order Numbers, refer to the “Ordering Information” section of this document. www.national.com inches (millimeters) unless otherwise noted NS Package Number T05D 20 ...

Page 21

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) TO263 5-Lead, Molded, Surface Mount Package (TO263-5) For Order Numbers, refer to the “Ordering Information” section of this document. NS Package Number TS5B 21 www.national.com ...

Page 22

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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