November 12, 2007
LM9076
150mA Ultra-Low Quiescent Current LDO Regulator with
Delayed Reset Output
LM9076 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output
General Description
The LM9076 is a ±3%, 150 mA logic controlled voltage regulator. The regulator features an active low delayed reset
output flag which can be used to reset a microprocessor system at turn-ON and in the event that the regulator output
voltage falls below a minimum value. An external capacitor
programs a delay time interval before the reset output pin can
return high.
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.
Typical Applications
Features
Available with 5.0V or 3.3V output voltage
■
Ultra Low Ground Pin Current, 25 μA typical for 100 μA
■
load
V
■
■
■
■
■
■
■
initial accuracy of ±1.5%
OUT
V
accurate to ±3% over Load and Temperature
OUT
Conditions
Low Dropout Voltage, 200 mV typical with 150 mA load
Low Off State Ground Pin current for LM9076BMA
Delayed RESET
+70V/-50V Voltage Transients
Operational VIN up to +40V
output pin for low V
detection
OUT
LM9076S-x.x in 5 lead TO-263 package
LM9076BMA-x.x in 8 lead SO package
© 2007 National Semiconductor Corporation 200830 www.national.com
20083029
20083030
Connection Diagrams
LM9076
20083028
Part Numbers LM9076S-3.3 and LM9076S-5.0
Top View
See NS TO-263 Package Number TS5
20083027
Part Numbers LM9076BMA-3.3 and LM9076BMA-5.0
Top View
See NS SOIC Package Number M08A
Ordering Information
Output Voltage Package Type Order Number Package Marking Shipped As
TO-263–5
3.3
SO-8
TO-263–5
5.0
SO-8
LM9076S-3.3 LM9076S-3.3 Rail of 45
LM9076SX-3.3 LM9076S-3.3 Tape and Reel of 500
LM9076BMA-3.3 9076B MA3.3 Rail of 95
LM9076BMAX-3.3 9076B MA3.3 Tape and Reel of 2500
LM9076S-5.0 LM9076S-5.0 Rail of 45
LM9076SX-5.0 LM9076S-5.0 Tape and Reel of 500
LM9076BMA-5.0 9076BMA5.0 Rail of 95
LM9076BMAX-5.0 9076BMA5.0 Tape and Reel of 2500
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LM9076
Absolute Maximum Ratings (Note 1)
VIN(DC) -15V to +55V
VIN(+Transient) t< 10ms, Duty Cycle
<1%
VIN(-Transient) t< 1ms, Duty Cycle
<1%
SHUTDOWN Pin -15V to +52V
RESET Pin -0.3V to 20V
C
Pin -0.3V to V
DELAY
Storage Temperature -65°C to +150°C
Junction Temperature (TJ ) +175C
+70V
-50V
OUT
+0.3V
Operating Ratings (Note 1)
VIN Pin
V
SHUTDOWN
Pin
Junction Temperature −40°C < TJ < +125°C
Thermal Resistance TS5B (Note 6)
θja 75°C/W
θjc 2.9°C/W
Thermal Resistance M08A (Note 6)
θja 156°C/W
θjc 59°C/W
5.35V to 40V
0V to 40V
ESD, HBM, per AEC - Q100 - 002 +/-2 kV
ESD, MM, per AEC - Q100 - 003 +/-250V
Electrical Characteristics for LM9076–3.3
The following specifications apply for VIN = 14V; I
specified. Bold values indicate −40°C ≤ TJ ≤ +125°C.(Notes 5, 4) Minimum and Maximum limits are guaranteed through test,
design or statistical correlation.
Symbol Parameter Conditions Min Typ Max Units
LM9076–3.3 REGULATOR CHARACTERISTICS
Output Voltage
V
OUT
Output Voltage Off
LM9076 BMA only
Reverse Battery
ΔV
OUT
Line Regulation
Load Regulation
V
I
GND
I
DO
SC
Dropout Voltage
Ground Pin Current
V
Short Circuit
OUT
Current
= 10 mA; TJ = +25C; C
LOAD
= 10 μF, 0.5Ω < ESR < 4.0Ω; unless otherwise
OUT
3.251 3.30 3.349 V
−20°C ≤ TJ ≤ 85°C
1 mA ≤ I
1mA ≤ I
LOAD
LOAD
≤ 150 mA
≤ 150 mA
VIN = 60V,
R
= 1 kΩ, t ≤ 40ms
LOAD
V
SHUTDOWN
R
LOAD
≥ 2V,
= 1 kΩ
VIN = -15V,
R
= 1 kΩ
LOAD
9.0V ≤ VIN ≤ 16V,
I
= 10 mA
LOAD
16V ≤ VIN ≤ 40V,
I
= 10 mA
LOAD
1 mA ≤ I
I
= 10 mA
LOAD
I
= 50 mA
LOAD
I
= 150 mA
LOAD
LOAD
≤ 150 mA
9V ≤ VIN ≤ 16V,
I
= 100 uA
LOAD
9V ≤ VIN ≤ 40V,
I
= 10 mA
LOAD
9V ≤ VIN ≤ 40V,
I
= 50 mA
LOAD
9V ≤ VIN ≤ 16V,
I
= 150 mA
LOAD
VIN = 14V,
R
= 1Ω
LOAD
3.234 3.30 3.366 V
3.201 3.30 3.399 V
2.970 3.30 3.630 V
–
−300 0
–
–
–
–
–
–
–
–
–
–
0 250 mV
–
4 25 mV
17 35 mV
42 60 mV
30 50 mV
80
–
150 250 mV
25 45
125 160
0.6
–
3.6 4.5 mA
200 400 750 mA
mV
mV
μA
μA
mA
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Symbol Parameter Conditions Min Typ Max Units
LM9076
PSRR Ripple Rejection
RESET PIN CHARACTERISTICS
V
OR
V
THR
V
OH
V
OL
C
PIN CHARACTERISTICS
DELAY
I
DELAY
V
OL
t
DELAY
Minimum VIN for valid
RESET Status
V
Threshold for
OUT
RESET Low
RESET pin high voltage
RESET pin low voltage
C
Charging
DELAY
Current
C
pin low voltage
DELAY
Reset Delay Time
VIN = (14VDC) + (1V
@ 120Hz)
I
= 50 mA
LOAD
(Note 3)
RMS
50 60
–
1.3 2.0 V
–
(Note 3) 0.83 0.89 0.94
External pull-up resistor
to V
= 100 kΩ
OUT
C
< 4.0V,
DELAY
I
= 250 µA
SINK
VIN = 14V,
V
= 0V
DELAY
V
< 4.0V,
OUT
I
= I
SINK
DELAY
VIN = 14V, C
DELAY
=
V
X 0.90 V
OUT
–
X 0.99 V
OUT
OUT
0.2 0.3 V
-0.70 -0.42 -0.25 uA
–
0.100
–
0.001 uF
V
rising from 0V, Δt
OUT
from V
OUT
> VOR to
4.7 7.8 13.2 ms
RESET pin HIGH
dB
X V
OUT
(Nom)
V
V
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Electrical Characteristics for LM9076–5.0
The following specifications apply for VIN= 14V; V
SHUTDOWN
4.0Ω; unless otherwise specified. Bold Values indicate −40°C ≤ TJ ≤ 125°C. (Note 4), (Note 5) Minimum and Maximum limits
are guaranteed through test, design, or statistical correlation.
Symbol Parameter Conditions Min Typ Max Units
LM9076–5.0 REGULATOR CHARACTERISTICS
Output Voltage
V
OUT
Output Voltage Off
LM9076 BMA only
Reverse Battery
ΔV
OUT
Line Regulation
Load Regulation
V
DO
Dropout Voltage
Ground Pin Current
I
GND
Ground Pin Current in
Shutdown Mode
V
Short Circuit
I
SC
OUT
Current
PSRR Ripple Rejection
RESET PIN CHARACTERISTICS
V
OR
V
THR
V
OH
V
OL
C
PIN CHARACTERISTICS
DELAY
Minimum VIN for valid
RESET Status
V
Threshold for
OUT
RESET Low
RESET pin high voltage
RESET pin low voltage
= Open; I
= 10 mA; TJ = +25°C; C
LOAD
= 10 µF, 0.5Ω < ESR <
OUT
4.925 5.00 5.075 V
−20°C ≤ TJ ≤ 85°C
1 mA ≤ I
1 mA ≤ I
LOAD
LOAD
≤ 150 mA
≤ 150 mA
VIN = 60V,
R
= 1 kΩ, t ≤ 40ms
LOAD
V
SHUTDOWN
R
LOAD
≥ 2V,
= 1 kΩ
VIN = -15V,
R
= 1 kΩ
LOAD
9.0V ≤ VIN ≤ 16V,
I
= 10 mA
LOAD
16V ≤ VIN ≤ 40V,
I
= 10 mA
LOAD
1 mA ≤ I
I
= 10 mA
LOAD
I
= 50 mA
LOAD
I
= 150 mA
LOAD
LOAD
≤ 150 mA
9V ≤ VIN ≤ 16V,
I
= 100 uA
LOAD
9V ≤ VIN ≤ 40V,
I
= 10 mA
LOAD
9V ≤ VIN ≤ 40V,
I
= 50 mA
LOAD
9V ≤ VIN ≤ 16V,
I
= 150 mA
LOAD
9V ≤ VIN ≤ 40V,
V
SHUTDOWN
= 2V
VIN = 14V,
R
= 1Ω
LOAD
VIN = (14VDC) + (1V
@ 120Hz)
I
= 50 mA
LOAD
(Note 3)
RMS
4.900 5.00 5.100 V
4.850 5.00 5.150 V
4.500 5.00 5.500 V
–
−300 0
–
–
–
–
–
–
–
–
–
–
–
0 250 mV
–
4 25 mV
17 35 mV
42 60 mV
30 50 mV
80
–
150 250 mV
25 45
125 160
0.6
–
3.6 4.5 mA
15 25
200 400 750 mA
50 60
–
1.3 2.0 V
–
(Note 3) 0.83 0.89 0.94
External pull-up resistor
to V
= 100 kΩ
OUT
C
< 4.0V,
DELAY
I
= 250 µA
SINK
V
OUT
X 0.90 V
–
X 0.99 V
OUT
OUT
0.2 0.3 V
mV
mV
μA
μA
mA
μA
dB
X V
OUT
(Nom)
V
LM9076
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Symbol Parameter Conditions Min Typ Max Units
C
Charging
LM9076
I
DELAY
V
t
DELAY
OL
DELAY
Current
C
pin low voltage
DELAY
Reset Delay Time
SHUTDOWN CONTROL LOGIC — LM9076BMA-5.0 Only
V
IL(SD)
V
IH(SD)
I
IH(SD)
I
IL(SD)
SHUTDOWN Pin Low
Threshold Voltage
SHUTDOWN Pin High
Threshold Voltage
SHUTDOWN Pin High
Bias Current
SHUTDOWN Pin Low
Bias Current
VIN = 14V,
V
= 0V
DELAY
V
< 4.0V,
OUT
I
= I
SINK
DELAY
VIN = 14V, C
DELAY
0.001 uF
V
rising from 0V, Δt
OUT
from V
OUT
> VOR to
RESET pin HIGH
V
SHUTDOWN
pin falling
from 5.0V until V
>4.5V (V
V
SHUTDOWN
from 0V until V
(V
OUT
V
SHUTDOWN
V
SHUTDOWN
V
SHUTDOWN
V
SHUTDOWN
OUT
= Off)
= On)
pin rising
OUT
= 40V
= 5V
= 2V
= 0V
=
OUT
< 0.5V
-0.70 -0.42 -0.25 uA
–
0.100
–
7.1 11.9 20.0 ms
1 1.5
–
–
–
–
–
1.5 2 V
35
15 35
6 10
0
–
– μA
μA
μA
– μA
V
V
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 (TJ ).
Note 5: The regulated output voltage specification is not guaranteed for the entire range of VIN and output loads. Device operational range is limited by the
maximum junction temperature (T J ). The junction temperature is influenced by the ambient temperature (T A ), package selection, input voltage (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 temperature will be limited.
Note 6: Worst case (FREE AIR) per EIA/JESD51–3.
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Typical Performance Characteristics
LM9076
Output Capacitor ESR
Output Voltage vs Low Input Voltage
20083031
Output Capacitor ESR
20083032
Output Voltage vs Low Input Voltage
20083033
Ground Pin Current vs Low Input Voltage
20083035
20083034
Ground Pin Current vs Low Input Voltage
20083036
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LM9076
Ground Pin Current vs Load Current
Ground Pin Current vs Load Current
20083037
Output Voltage vs Input Voltage
20083039
Output Voltage vs Junction Temperature
20083038
Output Voltage vs Input Voltage
20083040
Output Voltage vs Junction Temperature
20083041
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20083042
LM9076
Dropout Voltage vs Load Current
Load Transient Response
Load Transient Response
20083044
20083043
Line Transient Response
Line Transient Response
20083045
20083047
20083046
Delayed Reset Time vs Vin
Normalized to VIN = 14V
20083050
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LM9076
Ripple Rejection
20083051
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Application Information
REGULATOR BASICS
The LM9076 regulator is suitable for Automotive and Industrial applications where continuous connection to a battery
supply is required (refer to the Typical Application circuit).
The pass element of the regulator is a PNP device which requires an output bypass capacitor for stability. The minimum
bypass capacitance for the output is 10 μF (refer to ESR limitations). A 22 μF, or larger, output bypass capacitor is recommended for typical applications
INPUT CAPACITOR
The LM9076 requires a low source impedance to maintain
regulator stability because critical portions of the internal bias
circuitry are connected to directly to VIN. In general, a 10 μF
electrolytic capacitor, located within two inches of the
LM9076, is adequate for a majority of applications. Additionally, and at a minimum, a 0.1 μF ceramic capacitor should be
located between the LM9076 VIN and Ground pin, and as
close as is physically possible to the LM9076 itself .
OUTPUT CAPACITOR
An output bypass capacitor is required for stability. This capacitance must be placed between the LM9076 V
Ground pin, as close as is physically possible, using traces
that are not part of the load current path.
The output capacitor must meet the requirements for minimum capacitance and also maintain the appropriate ESR
value across the entire operating ambient temperature range.
There is no limit to the maximum output capacitance as long
as ESR is maintained.
The minimum bypass capacitance for the output is 10 μF (re-
fer to ESR limitations). A 22 μF, or larger, output bypass
capacitor is recommended for typical applications.
Solid tantalums capacitors are recommended as they generally maintain capacitance and ESR ratings over a wide temperature range. Ceramic capacitor types XR7 and XR5 may
be used if a series resistor is added to simulate the minimum
ESR requirement. See Figure 1.
Aluminum electrolytic capacitors are not recommended as
they are subject to wide changes in capacitance and ESR
across temperature.
OUT
pin and
SHUTDOWN PIN - LM9076BMA ONLY
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.
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 SHUTDOWN 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.
RESET FLAG
The RESET
pin is an open collector output which requires an
external pull-up resistor to develop the reset signal. The external pull-up resistor should be in the range of 10 kΩ to 200
kΩ.
At VIN values of less than typically 2V the RESET pin voltage
will be high. For VIN values between typically 2V and approximately V
VIN values greater than approximately V
SET pin voltage will be dependent on the status of the V
pin voltage and the Delayed Reset circuitry. The value of
+ VBE the RESET pin voltage will be low. For
OUT
+ VBE the RE-
OUT
OUT
VBE is typically 600 mV at 25°C and will decrease approximately 2 mV for every 1°C increase in the junction temperature. During normal operation the RESET pin voltage will be
high .
Any load condition that causes the V
below typically 89% of normal will activate the Delayed Reset
pin voltage to drop
OUT
circuit and the RESET pin will go low for the duration of the
delay time.
Any line condition that causes VIN pin voltage to drop below
typically V
out activating the Delayed Reset circuitry.
+ VBE will cause the RESET
OUT
pin to go low with-
Excessive thermal dissipation will raise the junction temperature and could activate the Thermal Shutdown circuitry
which, in turn, will cause the RESET pin to go low.
For the LM9076BMA devices, pulling the SHUTDOWN pin
high will turn off the output which, in turn, will cause the RESET pin to go low once the V
value that is less than typically 89% of normal. See Figure 2.
voltage has decayed to a
OUT
LM9076
20083048
FIGURE 1. Using Low ESR Capacitors
DELAY CAPACITOR
The capacitor on the Delay pin must be a low leakage type
since the charge current is minimal (420 nA typical) and the
pin must fully charge to V
polystyrene capacitor types are generally recommended, al-
. Ceramic, Mylar, and
OUT
though changes in capacitance values across temperature
changes will have some effect on the delay timing.
Any leakage of the I
pacitor or any other path, will extend the delay time, possibly
current, be it through the delay ca-
DELAY
to the point that the Reset pin output does not go high.
RESET DELAY TIME
When the regulator output is switched On, or after recovery
from brief V
programmed to remain low for an additional delay time. This
fault condition, the RESET flag can be can be
OUT
will give time for any system reference voltages, clock signals,
etc., to stabilize before the micro-controller resumes normal
operation.
This delay time is controlled by the capacitor value on the
C
pin. During normal operation the C
DELAY
charged to near V
SET pin to go low, the C
to ground. When the V
to the normal operating value, the C
charging at a typical constant 0.420 uA rate. When the voltage
on the C
V
DELAY
pin the RESET pin will be allowed to return high.
OUT
. When a V
OUT
capacitor is quickly discharged
DELAY
fault is removed, and V
OUT
fault causes the RE-
OUT
DELAY
capacitor reaches the same potential as the
capacitor is
DELAY
returns
OUT
capacitor begins
The typical RESET delay time can be calculated with the following formula:
11 www.national.com
t
= V
DELAY
For the LM9076–3.3 with a C
LM9076
I
value of 0.420 uA the typical RESET delay time is:
DELAY
t
=3.3V × (0.001 uF / 0.420 uA) = 7.8 ms
DELAY
For the LM9076–5.0 with a C
I
value of 0.420 uA the typical RESET
DELAY
t
= 5.0V X (0.001uF / 0.420uA) = 11.9 ms
DELAY
OUT
X (C
/ I
DELAY
value of 0.001 uF and a
DELAY
value of 0.001 uF and a
DELAY
)
DELAY
delay time is:
THERMAL PROTECTION
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 temperature will
be limited.
Even though the LM9076 is equipped with circuitry to protect
itself from excessive thermal dissipation, it is not recommended that the LM9076 be operated at, or near, the maximum
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
160°C the voltage regulator output will be switched off.
FIGURE 2. Typical Reset Pin Operational Waveforms
20083049
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Physical Dimensions inches (millimeters) unless otherwise noted
LM9076
5-Lead TO-263
NS Package Number TS5B
8-Lead (0.150" Wide) Molded SO Package
NS Package Number M08A
13 www.national.com
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LM9076 150mA Ultra-Low Quiescent Current LDO Regulator with Delayed Reset Output
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