National Semiconductor LM9074EP Technical data
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LM9074EP
Enhanced Plastic System Voltage Regulator with
Keep-Alive ON/OFF Control
LM9074EP Enhanced Plastic System Voltage Regulator with Keep-Alive ON/OFF Control
May 2004
General Description
The LM9074EP is a 5V, 3% accurate, 180 mA NPN voltage
regulator. The regulator features an active low delayed reset
output flag which can be used to reset a microprocessor
system on turn-ON and in the event that the regulator output
falls out of regulation for any reason. An external capacitor
programs a delay time interval before the reset output can
return high.
Designed for automotive application the LM9074EP contains
a variety of protection features such as reverse battery,
over-voltage shutdown, thermal shutdown, input transient
protection and a wide operating temperature range.
A unique two-input logic control scheme is used to enable or
disable the regulator output. An ON/OFF input can be provided by an ignition switch derived signal while a second,
Keep-Alive input, is generated by a system controller. This
allows for a system to remain ON after ignition has been
switched OFF. The system controller can then execute a
power-down routine and after which command the regulator
OFF to a low quiescent current state (60 µA max).
Design techniques have been employed to allow the regulator to remain operational and not generate false reset
signals when subjected to high levels of RF energy (300V/m
from 2 MHz to 400 MHz).
ENHANCED PLASTIC
Extended Temperature Performance of −40˚C to +125˚C
•
Baseline Control - Single Fab & Assembly Site
•
Process Change Notification (PCN)
•
Qualification & Reliability Data
•
Solder (PbSn) Lead Finish is standard
•
Enhanced Diminishing Manufacturing Sources (DMS)
•
Support
Features
n Automotive application reliability
n 3% output voltage tolerance
n Insensitive to radiated RFI
n Dropout voltage less than 2.5V with 180mA output
current
n Externally programmed reset delay interval
n Keep-alive feature with 2 logic control inputs
n +40V Load dump transient protection
n Thermal shutdown
n Short circuit protection and disable safety features
n Reverse battery protection
n Low OFF quiescent current, 60µA maximum
Applications
n Selected Military Applications
n Selected Avionics Applications
Ordering Information
PART NUMBER VID PART NUMBER NS PACKAGE NUMBER (Note 3)
LM9074MEP V62/04637-01 M14A
(Notes 1, 2) TBD TBD
Note 1: For the following (Enhanced Plastic) version, check for availability: LM9074MXEP. Parts listed with an "X" are provided in Tape & Reel and
parts without an "X" are in Rails.
Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/
mil
Note 3: Refer to package details under Physical Dimensions
© 2004 National Semiconductor Corporation DS200908 www.national.com
Connection Diagram (Top View)
LM9074EP Enhanced Plastic
14-Pin SO Package
See NS Package Number M14A
20090802
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LM9074EP Enhanced Plastic
Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Junction Temperature 150˚C
ESD Susceptibility (Note 5) 12 kV, 2 kV
Lead Temperature
(Soldering, 10 seconds) 260˚C
Storage Temperature −50˚C to +150˚C
ON/OFF, Keep-Alive Inputs
(through 1 kΩ)
Operating Ratings (Note 4)
DC Input Voltage −26V to +26V
<
Positive Input Transient (t
Negative Input Transient (t
100 ms) 40V
<
1 ms) −50V
Reset Output Sink Current 5 mA
Power Dissipation Internally Limited
Input Voltage 7.5V to 16.5V
Ambient Temperature −40˚C to +125˚C
θja, M14A Package 88˚C/W
θjc, M14A Package 34˚C/W
Electrical Characteristics
The following specifications apply for VCC= 7.5V to 16.5V, −40˚C ≤ TA≤ 125˚C, unless otherwise specified. C
Symbol Parameter Conditions Min Max Units
REGULATOR OUTPUT
V
OUT
∆V
Line Line Regulation I
OUT
∆V
Load Load Regulation VIN= 14.4V, 20 mA ≤ I
OUT
Iq Quiescent Current 4V ≤ V
Output Voltage 20 mA ≤ I
= 20 mA, 9V ≤ VIN≤ 16.5V
OUT
= 20 mA, 7.5V ≤ VIN≤ 16.5V
I
OUT
ON/OFF
20mA ≤ I
≤ 180 mA 4.85 5.15 V
OUT
≤ 180 mA 50 mV
OUT
≤ V
IN
≤ 180mA
OUT
=0.1µF.
OUT
25
50
25 mA
mV
mV
Ioff OFF Quiescent Current V
Vdo Dropout Voltage I
Isc Short Circuit Current R
PSRR Ripple Rejection V
Voth
OFF
Vo Transient V
Safety V
OUT
Latch-OFF Threshold In Keep-Alive mode
OUT
during Transients VINPeak ≤ 40V,
≤ 16.5V, Regulator OFF
IN
−40˚C ≤ T
60˚C ≤ T
OUT
I
OUT
=1Ω 0.4 1.0 A
L
IN
I
OUT
V
ON/OFF
= 100Ω, τ = 100 ms
R
L
≤ 60˚C
J
≤ 135˚C
J
=20mA
= 180 mA
= (14VDC) + (1V
RMS
@
120Hz)
=50mA 60 dB
= 0V, VKA= 0V 4 4.5 V
20
60
2.0
2.5
5.5 V
µA
µA
V
V
RESET OUTPUT
Vth Threshold Voltage ∆V
Vlow Reset Output Low Voltage Isink = 1.6 mA, V
Vhigh Reset Output High Voltage 0.9 V
t
delay
I
delay
Delay Time Cdelay = 0.1 µFd 7 45 ms
Charging Current for Cdelay −7 25 µA
Required to Generate a Reset
OUT
Output
4.85V ≤ V
1.4V ≤ V
≤ 5.15V
OUT
OUT
≤ 3.2V 0.8 V
OUT
−300 −500 mV
>
3.2V 0.4 V
OUT
V
OUT
V
Rpu Internal Pull-up Resistance 12 80 kΩ
CONTROL LOGIC
V
low Low Input Threshold Voltage,
KA
Keep-Alive Input
V
high High Input Threshold Voltage,
KA
Keep-Alive Input
V
V
low Low Input Voltage, ON/OFF Input Rseries = 1 kΩ −2 2 V
ON/OFF
high High Input Voltage, ON/OFF Input Rseries = 1 kΩ 4VINV
ON/OFF
3.5V ≤ V
3.5V ≤ V
≤ 5.25V 0.3 V
OUT
≤ 5.25V 0.6 V
OUT
OUT
OUT
0.5 V
0.8 V
OUT
OUT
V
V
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