LM9076M [NSC]
150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output; 150毫安超低静态电流LDO稳压器，带有延迟复位输出
| 型号： | LM9076M |
| 厂家： | 
National Semiconductor |
| 描述： | 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output |
| 文件： | 总8页 (文件大小：259K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
December 2003
LM9076
150mA Ultra-Low Quiescent Current LDO Regulator with
Delayed Reset Output
General Description
Features
n Ultra Low Ground Pin Current, 25µA typical for 100µA
The LM9076 is a 5 Volt, +/-2%, 150mA logic controlled
voltage regulator. The regulator features an active low de-
layed reset output flag which can be used to reset a micro-
processor system at turn-ON and in the event that the regu-
lator input voltage falls below a minimum value. An external
capacitor programs a delay time interval before the reset
output pin can return high.
load
n VOUT initial accuracy of +/-1%
n VOUT accurate to +/2% over Load and Temperature
Conditions
n
Low Dropout Voltage, 200mV typical with 150mA load
n Low Off State Ground Pin current
n Delayed RESET output pin for low VOUT detection
n +70V/-50V Voltage Transients
Designed for automotive and industrial applications, the
LM9076 contains a variety of protection features such as
thermal shutdown, input transient protection and a wide
operating temperature range. The LM9076 uses an PNP
pass transistor which allows low drop-out voltage operation.
n Operational VIN up to +40V
Typical Application
20083030
Package Outline
20083028
Top View
Part Number LM9076BMA–5.0
See NS SOIC Package Number M08A
20083027
Top View
Part Number LM9076S–5.0
See NS TO-263 Package Number TS5
© 2004 National Semiconductor Corporation
DS200830
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Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 1)
VIN(DC)
-15V to +55V
VIN Pin
5.35V to 40V
0V to 40V
<
<
<
V
V
IN(+Transient) t 10ms, Duty Cycle 1% +70V
VSHUTDOWN Pin
<
<
<
IN(-Transient) t 1ms, Duty Cycle 1% -50V
Ambient Temperature
−40˚C TA +125˚C
SHUTDOWN Pin
-15V to +52V
-0.3V to 20V
Thermal Resistance TS5B (Note 6)
RESET Pin
θja
75˚C/W
2.9˚C/W
CDELAY Pin
-0.3V to VOUT +0.3V θjc
Storage Temperature
Junction Temperature (TJ )
ESD, HBM, per AEC - Q100 - 002
ESD, MM, per AEC - Q100 - 003
-65˚C to +150˚C
+175C
Thermal Resistance M08A (Note 6)
θja
θjc
156˚C/W
59˚C/W
+/-2kV
+/-250V
Electrical Characteristics for LM9076–5.0
<
<
The following specifications apply for VIN= 14V; VSHUTDOWN = Open; ILOAD = 10mA; TA = +25˚C; COUT = 10µF, 0.5Ω ESR
4.0Ω; unless otherwise specified. Bold Values indicate −40˚C ≤ TA≤ 125˚C. (Note 4, Note 5)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
LM9076–5.0 REGULATOR CHARACTERISTICS
VOUT
Output Voltage
4.95
4.90
4.50
5.00
5.00
5.00
5.05
5.10
5.50
V
V
V
1mA ≤ ILOAD ≤ 150mA
VIN = 60V,
RLOAD = 1KΩ, t ≤
40ms
Output Voltage Off
Reverse Battery
Line Regulation
VSHUTDOWN ≥ 2V,
RLOAD = 1KΩ
–
–
–
–
40
0
250
–300
25
mV
mV
mV
mV
VIN = -15V,
RLOAD = 1KΩ
∆VOUT
9.0V ≤ VIN ≤ 16V,
ILOAD = 10mA
16V ≤ VIN ≤ 40V,
ILOAD = 10mA
1mA ≤ ILOAD ≤ 150mA
ILOAD = 10mA
ILOAD = 50mA
ILOAD = 150mA
9V ≤ VIN ≤ 16V,
ILOAD = 100uA
9V ≤ VIN ≤ 40V,
ILOAD = 10mA
9V ≤ VIN ≤ 40V,
ILOAD = 50mA
9V ≤ VIN ≤ 16V,
ILOAD = 150mA
9V ≤ VIN ≤ 40V,
VSHUTDOWN = 2V
VIN = 14V,
4
17
25
Load Regulation
Dropout Voltage
–
–
–
–
–
42
30
60
50
–
mV
mV
mV
mV
µA
VDO
80
150
25
250
35
IGND
Ground Pin Current
–
–
125
0.6
3.6
15
160
–
µA
mA
mA
µA
–
4.5
25
750
–
Ground Pin Current
in Shut- down Mode
VOUT Short Circuit
Current
–
ISC
200
400
mA
RLOAD = 1Ω
PSRR
Ripple Rejection
VIN = (14VDC) +
@
(1VRMS 120Hz)
50
–
60
dB
V
ILOAD = 50mA
RESET PIN CHARACTERISTICS
VOR
Minimum VIN for valid
RESET Status
(Note 3)
1.3
2.0
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2
Electrical Characteristics for LM9076–5.0 (Continued)
4.0Ω; unless otherwise specified. BoldINValues indicate −40˚C ≤ TA≤ 125˚C. (Note 4, Note 5)
<
<
The following specifications apply for V = 14V; VSHUTDOWN = Open; ILOAD = 10mA; TA = +25˚C; COUT = 10µF, 0.5Ω ESR
Symbol
Parameter
Conditions
(Note 3)
External pull-up
Min
0.83
Typ
0.89
Max
0.94
VOUT
Units
RESET PIN CHARACTERISTICS
VTHR
VOH
VOUT Threshold for
RESET Low
X VOUT
(Nom)
V
RESET pin high
voltage
VOUT X 0.90
VOUT X 0.99
resistor to VOUT
=
100kΩ
<
VOL
RESET pin low
voltage
CDELAY 4.0V,
–
0.2
0.3
V
ISINK = 250µA
CDELAY PIN CHARACTERISTICS
IDELAY
CDELAY Charging
Current
VIN = 14V,
-0.35
—
-0.42
0.100
11.9
-0.50
—
uA
V
VDELAY = 0V
<
VOL
CDELAY pin low
voltage
VOUT 4.0V,
ISINK = IDELAY
VIN = 14V, CDELAY
0.001uF
tDELAY
Reset Delay Time
=
9.5
14.3
ms
VOUT rising from 0V,
>
∆t from VOUT VOR
to RESET pin HIGH
SHUTDOWN CONTROL LOGIC — LM9076BMA Only
VIL(SD)
VIH(SD)
IIH(SD)
SHUTDOWN Input
Low Threshold
Voltage
VSHUTDOWN pin falling
from 5.0V until Vout
1
1.5
1.5
—
2
V
V
>
4.5V (Vout = On)
SHUTDOWN Input
High Threshold
Voltage
VSHUTDOWN pin rising
<
from 0V until Vout
0.5V (Vout = Off)
VSHUTDOWN = 40V
VSHUTDOWN = 5V
VSHUTDOWN = 2V
VSHUTDOWN = 0V
—
SHUTDOWN Pin
High Bias Current
—
—
—
—
35
15
6
µA
µA
µA
µA
35
10
—
IIL(SD)
SHUTDOWN Input
Low Bias Current
0
Note 1: Absolute Maximum Ratings indicate the limits beyond which the device may cease to function, and/or damage to the device may occur.
Note 2: Operating Ratings indicate conditions for which the device is intended to be functional, but does not guarantee specific performance limits. For guaranteed
specifications and conditions refer to the Electrical Characteristics
Note 3: Not Production tested, Guaranteed by Design. Minimum, Typical, and/or Maximum values are provided for informational purposes only.
Note 4: Pulse testing used maintain constant junction temperature (T ).
J
Note 5: The regulated output voltage specification is not guaranteed for the entire range of V and ouput loads. Device operational range is limited by the maximum
IN
junction temperature (T ). The junction temperature is influenced by the ambient temperature (T A ), package selection, input voltage (V ), and the output load
J
IN
current. When operating with maximum load currents the input voltage and/or ambient temperature will be limited. When operating with maximum input voltage the
load current and/or the ambient temperature will be limited.
Note 6: Worst case (FREE AIR) per EIA/JESD51–3.
3
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Typical Performance Characteristics
Output Capacitor ESR
Output Capacitor ESR
20083031
20083032
Low Voltage Behavior
High Voltage Behavior
20083033
20083034
Dropout Voltage
Ground Pin Current vs Load Current
20083036
20083037
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4
Typical Performance Characteristics (Continued)
Output Voltage vs Junction Temperature
20083038
Application Information
REGULATOR BASICS
capacitor types are generally recommended, although
changes in capacitance values across temperature changes
will have some effect on the delay timing.
This regulator is suitable for Automotive applications where
continuous connection to the battery is required (refer to the
Typical Application circuit).
SHUTDOWN PIN
The pass transistor of the regulator is an PNP device. A 10uF
capacitor on the VOUT pin will provide adequate performance
in most circumstances. There is no maximum value for the
regulator output bypass capacitance.
The basic On/Off control of the regulator is accomplished
with the SHUTDOWN pin. By pulling the SHUTDOWN pin
high the regulator output is switched Off. When the regulator
is switched Off the load on the battery will be primarily due to
the SHUTDOWN pin current.
INPUT CAPACITOR
When the SHUTDOWN pin is low, or left open, the regulator
is switched On. When an unregulated supply, such as V
BATTERY , is used to pull the SHUTDOWN pin high a series
resistor in the range of 10KΩ to 50KΩ is recommended to
provide reverse voltage transient protection of the SHUT-
DOWN pin. Adding a small capacitor (0.001uF typical) from
the SHUTDOWN pin to Ground will add noise immunity to
prevent accidental turn on due to noise on the supply line.
The LM9076 requires a low source impedance to maintain
regulator stability because portions of the internal bias cir-
cuitry are connected directly to VIN. At a minimum, at 0.1µF
ceramic capacitor should be placed between the LM9076
VIN and Ground pins, as close as is physically possible.
OUTPUT CAPACITOR
An output capacitor is also required for stability. This capaci-
tor must be placed between the LM9076 VOUT and Ground
pins, as close as is physically possible, using traces that are
not part of the main load current path.
RESET FLAG
Proper operation of the RESET circuity is not guaranteed for
VIN voltages of less than 2.0V. The RESET pin will provide
information on the status of the regulator VOUT voltage level.
Any condition that causes the VOUT voltage to drop to typi-
cally 89% normal would cause the RESET pin to go low. This
will warn of a system Vcc supply that may cause abnormal
operation.
The output capacitor must meet the requirements for mini-
mum capacitance and also maintain the appropriate ESR
value of the full operating ambient temperature range to
assure stability. There is no maximum limit for the output
capacitance value, as long as ESR is maintained. See the
Typical Performance Characteristics curves for details.
Of course, when the regulator is switched Off in normal
operation the RESET pin will be low.
Solid tantalum capacitors are recommended as they gener-
ally maintain capacitance and ESR ratings over a wide tem-
perature range.
If the regulator is On, and then switched off, the RESET flag
will go low when the VOUT voltage stored on the output
capacitor has decayed adequately.
Ceramic capacitor types XR7 and X5R may be used if a
series resistor is added to simulate the ESR requirement.
Excessive thermal dissipation of the device such that the
Thermal Shutdown circuit is activated which then switches
the regulator output Off, would cause the RESET pin to go
low.
Aluminum electrolytic capacitors are not recommend, as
they are subject to wide changes in capacitance and ESR
values across temperature.
The RESET pin is an open collector output and requires an
external pull-up resistor to VOUT . The external pull-up resis-
tor should be in the range of 10KΩ to 200KΩ.
DELAY CAPACITOR
The capacitor on the Delay pin must be a low leakage type
since the charge current is minimal (500nA typical) and the
pin must fully charge to 5V. Ceramic, Mylar, and polystyrene
5
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tDELAY = VOUT X (0.001uF / 0.475uA)
Application Information (Continued)
RESET DELAY TIME
tDELAY = 5.0V X (0.001uF / 0.420uA) = 11.9ms
THERMAL PROTECTION
When the regulator output is switched On, or after recovery
from brief VOUT fault condition, the RESET flag can be can
be programmed to remain low for an additional delay time.
This will give time for any system reference voltages, clock
signals, etc., to stabilize before the micro-controller resumes
normal operation.
Device operational range is limited by the maximum junction
temperature (TJ). The junction temperature is influenced by
the ambient temperature (TA), package selection, input volt-
age (VIN), and the output load current. When operating with
maximum load currents the input voltage and/or ambient
temperature will be limited. When operating with maximum
input voltage the load current and/or the ambient tempera-
ture will be limited.
This delay time is controlled by the capacitor value on the
CDELAY pin. During normal operation the CDELAY capacitor is
charged to near VOUT . When a VOUT fault causes the
RESET pin to go low, the CDELAY capacitor is quickly dis-
charged to ground. When the VOUT fault is removed, and
VOUT returns to the normal operating value, the CDELAY
capacitor begins charging at a typical constant 0.420uA rate.
When the voltage on the CDELAY capacitor reaches the same
potential as the VOUT pin the RESET pin will be allowed to
return high.
Even though the LM9076 is equipped with circuitry to protect
itself from excessive thermal dissipation, it is not recom-
mended that the LM9076 be operated at, or near, the maxi-
mum recommended die junction temperature (TJ) as this
may impair long term device reliability.
The thermal protection circuity monitors the temperature at
the die level. When the die temperature exceeds typically
160C the voltage regulator output will be switched off.
The typical RESET delay time can be calculated with the
following formula:
tDELAY = VOUT X (CDELAY / IDELAY
)
For a CDELAY value of 0.001uF and a IDELAY value of
0.475uA the typical RESET delay time is:
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6
Physical Dimensions inches (millimeters) unless otherwise noted
5-Lead
Order Number LM9076S
NS Package Number TS5B
7
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
8-Lead (0.150" Wide) Molded SO Package
Order Number LM9076M
NS Package Number M08A
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