LP38692SD-ADJ/NOPB National Semiconductor, LP38692SD-ADJ/NOPB Datasheet

IC REG LDO 1A ADJ 6-LLP

LP38692SD-ADJ/NOPB

Manufacturer Part Number
LP38692SD-ADJ/NOPB
Description
IC REG LDO 1A ADJ 6-LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheet
1.LP38690SD-ADJNOPB.pdf (16 pages)

Specifications of LP38692SD-ADJ/NOPB

Regulator Topology
Positive Adjustable
Voltage - Output
1.25 ~ 9 V
Voltage - Input
2.7 ~ 10 V
Voltage - Dropout (typical)
0.45V @ 1A
Number Of Regulators
1
Current - Output
1A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
6-LLP
Primary Input Voltage
10V
Output Voltage Adjustable Range
1.25V To 9V
Dropout Voltage Vdo
450mV
No. Of Pins
6
Output Current
1A
Voltage Regulator Case Style
LLP
Operating Temperature Range
-40°C To
Rohs Compliant
Yes
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
10 V
Output Voltage
1.25 V to 9 V
Output Type
Adjustable
Dropout Voltage (max)
1.6 V At 1 A
Line Regulation
0.03 %/V
Load Regulation
1.8 %/A
Voltage Regulation Accuracy
+/- 2.5 %
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
For Use With
LP38692EVAL - BOARD EVALUATION LP38692
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
 Details
Other names
LP38692SD-ADJ
LP38692SD-ADJTR
© 2010 National Semiconductor Corporation
1A Low Dropout CMOS Linear Regulators with Adjustable
Output
Stable with Ceramic Output Capacitors
General Description
The LP38690/2-ADJ low dropout CMOS linear regulators pro-
vide 2.5% precision reference voltage, extremely low dropout
voltage (450mV @ 1A load current, V
AC performance utilizing ultra low ESR ceramic output ca-
pacitors.
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: 450 mV (typ) @ 1A (typ. 5V out).
Ground Pin Current: 55 µA (typ) at full load.
Adjust Pin Voltage: 2.5% (25°C) accuracy.
Typical Application Circuits
Note: *Minimum value required for stability.
OUT
201267
= 5V) and excellent
V
OUT
LP38690-ADJ
LP38692-ADJ
= V
ADJ
x (1 + R1/R2)
Features
■
■
■
■
■
■
■
■
■
■
■
Applications
■
■
■
■
Output voltage range of 1.25V - 9V
2.5% adjust pin voltage accuracy (25°C)
Low dropout voltage: 450mV @ 1A (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 (LP38692-ADJ)
Hard Disk Drives
Notebook Computers
Battery Powered Devices
Portable Instrumentation
20126701
20126702
December 16, 2010
www.national.com

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LP38692SD-ADJ/NOPB Summary of contents

Page 1

... Dropout Voltage: 450 mV (typ (typ. 5V out). Ground Pin Current: 55 µA (typ) at full load. Adjust Pin Voltage: 2.5% (25°C) accuracy. Typical Application Circuits Note: *Minimum value required for stability. © 2010 National Semiconductor Corporation LP38690-ADJ LP38692-ADJ Features ■ Output voltage range of 1.25V - 9V ■ ...

Page 2

... LLP Only - The DAP (Exposed Pad) functions as a thermal connection when soldered to a copper plane. See www.national.com 20126703 SOT-223, Top View LP38692MP-ADJ 20126704 Description LLP MOUNTING section in Application Hints 2 20126705 6-Lead LLP, Top View LP38692SD-ADJ pins must be tied IN for more information. ...

Page 3

... Marking LP38690SD-ADJ L112B LP38690SDX-ADJ L112B LP38692MP-ADJ LJNB LP38692MPX-ADJ LJNB LP38692SD-ADJ L122B LP38692SDX-ADJ L122B For LP38690-ADJ Ordering and Availability Information see: http://www.national.com/pf/LP/LP38690-ADJ.html#Order For LP38692-ADJ Ordering and Availability Information see: http://www.national.com/pf/LP/LP38692-ADJ.html#Order Package Package Type Drawing 6-Lead LLP SDE06A 6-Lead LLP SDE06A ...

Page 4

... 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 (Note 3) Power Dissipation (Note 2) Electrical Characteristics the full operating temperature range. Unless otherwise specified: V limits are guaranteed through testing, statistical correlation, or design ...

Page 5

Symbol Parameter e Output Noise n V (LEAK) Output Leakage Current O V Enable Voltage (LP38692-ADJ EN Only) I Enable Pin Leakage (LP38692- EN ADJ Only) Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may ...

Page 6

Block Diagrams FIGURE 2. LP38692-ADJ Functional Diagram (SOT-223, LLP) www.national.com FIGURE 1. LP38690-ADJ Functional Diagram (LLP) 6 20126706 20126707 ...

Page 7

Typical Performance Characteristics pin is tied to V (LP38692-ADJ only Noise vs Frequency Noise vs Frequency Ripple Rejection Unless otherwise specified 1.25V 2.7V 10mA 20126735 20126737 20126719 7 = ...

Page 8

V vs Temperature ADJ Line Transient Response Line Transient Response www.national.com Line Transient Response 20126730 Line Transient Response 20126724 Line Transient Response 20126726 8 20126723 20126725 20126727 ...

Page 9

Line Transient Response 20126728 Load Transient Response 20126741 Load Transient Response 20126743 Load Transient Response Load Transient Response Load Transient Response 9 20126740 20126742 20126744 www.national.com ...

Page 10

OUT IN OUT (Power-Up) OUT OFF (LP38692 Only) OUT EN www.national.com = 1.25V 20126758 20126760 20126762 1.80V OUT IN OUT ...

Page 11

Dropout Voltage vs I OUT 20126751 Load Regulation vs Temperature 20126754 Enable Voltage vs Temperature Line Regulation vs Temperature 11 20126753 20126755 www.national.com ...

Page 12

Application Hints 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: An input capacitor of at least 1µF is re- quired (ceramic recommended). The ...

Page 13

If used in a dual-supply system where the regulator output load is returned to a negative supply, the output pin must be diode clamped to ground to limit the negative voltage transi- tion. A Schottky diode is recommended for this ...

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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