LP38693-ADJEV National Semiconductor, LP38693-ADJEV Datasheet

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LP38693-ADJEV

Manufacturer Part Number
LP38693-ADJEV
Description
BOARD EVAL 500MA LDO REG ADJ
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheets

Specifications of LP38693-ADJEV

Channels Per Ic
1 - Single
Voltage - Output
1.25 ~ 9V
Current - Output
500mA
Voltage - Input
2.7 ~ 10V
Regulator Type
Positive Adjustable
Operating Temperature
-40°C ~ 125°C
Board Type
Fully Populated
Utilized Ic / Part
LP38693
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2011 National Semiconductor Corporation
500mA Low Dropout CMOS Linear Regulators with
Adjustable Output
Stable with Ceramic Output Capacitors
General Description
The LP38691/3-ADJ low dropout CMOS linear regulators pro-
vide 2.0% precision reference voltage, extremely low dropout
voltage (250mV @ 500mA load current, V
cellent AC performance utilizing ultra low ESR ceramic output
capacitors.
The low thermal resistance of the LLP and SOT-223 pack-
ages allow the full operating current to be used even in high
ambient temperature environments.
The use of a PMOS power transistor means that no DC base
drive current is required to bias it allowing ground pin current
to remain below 100 µA regardless of load current, input volt-
age, or operating temperature.
Dropout Voltage: 250 mV (typ) @ 500mA (typ. 5V out).
Ground Pin Current: 55 µA (typ) at full load.
Adjust Pin Voltage: 2.0% (25°C) accuracy.
Typical Application Circuits
Note: *Minimum value required for stability.
201268
OUT
= 5V) and ex-
V
OUT
LP38691-ADJ
LP38693-ADJ
= V
ADJ
x (1 + R1/R2)
Features
Applications
LP38691QSD-ADJ is AEC-Q100 Grade 1
Output voltage range of 1.25V - 9V
2.0% adjust pin voltage accuracy (25°C)
Low dropout voltage: 250mV @ 500mA (typ, 5V out)
Wide input voltage range (2.7V to 10V)
Precision (trimmed) bandgap reference
Guaranteed specs for -40°C to +125°C
1µA off-state quiescent current
Thermal overload protection
Foldback current limiting
SOT-223 and 6-Lead LLP packages
Enable pin (LP38693-ADJ)
Hard Disk Drives
Notebook Computers
Battery Powered Devices
Portable Instrumentation
20126801
20126802
March 17, 2011
www.national.com

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LP38693-ADJEV Summary of contents

Page 1

... Guaranteed specs for -40°C to +125°C ■ 1µA off-state quiescent current ■ Thermal overload protection ■ Foldback current limiting ■ SOT-223 and 6-Lead LLP packages ■ Enable pin (LP38693-ADJ) Applications ■ Hard Disk Drives ■ Notebook Computers ■ Battery Powered Devices ■ Portable Instrumentation ...

Page 2

... LLP Only - The DAP (Exposed Pad) functions as a thermal connection when soldered to a copper DAP plane. See www.national.com 20126803 SOT-223, Top View LP38693MP-ADJ 20126804 Description LLP MOUNTING section in Application Hints 2 20126805 6-Lead LLP, Top View LP38693SD-ADJ pins must be tied IN for more information. ...

Page 3

... Reliability qualification is compliant with the requirements and temperature grades defined in the AEC Q100 standard. Automotive Grade products are identified with the letter Q. For more information go to: http://www.national.com/automotive For LP38691-ADJ Ordering and Availability Information see: http://www.national.com/pf/LP/LP38691-ADJ.html#Order For LP38693-ADJ Ordering and Availability Information see: http://www.national.com/pf/LP/LP38693-ADJ.html#Order Package Package ...

Page 4

... 0. 0. 3. 0.5A L ≤ V 10V 100 µ ≤ V 0.4V, EN (LP38693-ADJ Only) ≤ > < 2V(DC), with 1V(p- 120Hz Ripple 1.5V ADJ V = 10V IN 4 2.7V to 10V −40°C to +125°C = 25°C, and limits in boldface type apply over µ 10mA. Min/Max ...

Page 5

... Enable Voltage (LP38693-ADJ EN Only) I Enable Pin Leakage (LP38693- EN ADJ Only) Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics. Specifications do not apply when operating the device outside of its rated operating conditions ...

Page 6

... Block Diagrams FIGURE 2. LP38693-ADJ Functional Diagram (SOT-223, LLP) www.national.com FIGURE 1. LP38691-ADJ Functional Diagram (LLP) 6 20126806 20126807 ...

Page 7

... Typical Performance Characteristics pin is tied to V (LP38693-ADJ only Noise vs Frequency Noise vs Frequency Ripple Rejection Unless otherwise specified 1.25V 2.7V 10mA 20126835 20126837 20126819 7 = 25° µF, enable J IN OUT Noise vs Frequency 20126836 Ripple Rejection 20126817 Ripple Rejection 20126821 www.national.com ...

Page 8

V vs Temperature REF Line Transient Response Line Transient Response www.national.com Line Transient Response 20126830 Line Transient Response 20126824 Line Transient Response 20126826 8 20126823 20126825 20126827 ...

Page 9

Line Transient Response 20126828 Load Transient Response Load Regulation vs Temperature 20126854 Load Transient Response Enable Voltage vs Temperature 20126844 Line Regulation vs Temperature 9 20126842 20126853 20126855 www.national.com ...

Page 10

... OUT IN OUT Power-Up OUT OFF (LP38693 Only) OUT EN www.national.com = 1.25V 20126858 20126860 20126862 1.80V OUT IN OUT 20126859 (LP38693 Only) OUT EN 20126861 MIN OUT 20126856 ...

Page 11

Dropout Voltage vs I OUT (V = 1.8V) OUT 20126857 11 www.national.com ...

Page 12

... During normal operation, the input voltage is higher than the output voltage and the parasitic diode is reverse bi- ased. However, when V circuity is alive, or the Enable pin is low (LP38693-ADJ only), and the output voltage is more than 500 mV (typical) above the input voltage the parasitic diode becomes forward biased and current flows from the output pin to the input pin through the diode ...

Page 13

... JC package at the center of the DAP. The junction-to-ambient thermal performance for the LP38691SD-ADJ LP38693SD-ADJ in the SDE06A 6-Lead LLP package, using the JEDEC JESD51 standards is summarized in the following table: Board Type JEDEC 2-Layer JESD 51-3 ...

Page 14

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 6-lead, LLP Package NS Package Number SDE06A SOT-223 Package NS Package Number MP05A 14 ...

Page 15

Notes 15 www.national.com ...

Page 16

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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