DATASHEET
ISL78307
40V, Low Quiescent Current, 50mA Linear Regulator for Automotive Applications
The
ISL78307
is a high voltage, low quiescent current linear
regulator ideally suited for “always-on” and “keep alive”
automotive applications. The ISL78307 operates from an
input voltage of +6V to +40V under normal operating
conditions and operates down to +3V under a cold crank. It
consumes only 18µA of quiescent current at no load on the
adjustable version.
The ISL78307 is available in fixed 3.3V, 5V, and adjustable
output voltage (2.5V to 12V) options. It features an EN pin that
can be used to put the device into a low-quiescent current
shutdown mode where it draws only 1.8µA of supply current.
The device features over-temperature shutdown and current
limit protection.
The ISL78307 is AEC-Q100 qualified. It is rated across the
-40°C to +125°C automotive temperature range and is
available in an 8 Ld EPSOIC with exposed pad package.
FN7658
Rev.4.00
Aug 8, 2019
Features
• Optimized for “always-on” automotive applications
• 18µA typical quiescent current
• Ensured 50mA output current
• Operates through cold crank down to 3V
• 40V tolerant logic level (TTL/CMOS) enable input
• 1.8µA of typical shutdown current
• Low dropout voltage of 120mV at 50mA
• Fixed +3.3V, +5.0V and adjustable output voltage options
• Stable operation with 10µF output capacitor
• Thermal shutdown and current limit protection
• -40°C to +125°C operating temperature range
• Thermally enhanced 8 Ld exposed pad SOIC package
•
AEC-Q100
qualified
• 6kV ESD HBM rated
• Pb-free (RoHS compliant)
Applications
• Automotive
• Industrial
• Telecom
Related Literature
For a full list of related documents, visit our website
•
ISL78307
product page
V
IN
= 14V
C
IN
0.1µF
IN
OUT
R1
V
OUT
= 12V
C
OUT
10µF
C
IN
0.1µF
V
IN
= 14V
IN
OUT
V
OUT
= 5V
C
OUT
10µF
EN
(ISL78307)
ADJ
R2
EN
(ISL78307)
GND
GND
FIGURE 1. TYPICAL APPLICATION - ADJ VERSION
FIGURE 2. TYPICAL APPLICATION - FIXED VERSION
70
60
QUIESCENT CURRENT (µA)
LOAD = 50mA
50
40
30
20
LOAD = 0mA
10
0
-50
0
50
TEMPERATURE (°C)
100
150
FIGURE 3. QUIESCENT CURRENT vs LOAD CURRENT (ADJ VERSION AT UNITY GAIN). V
IN
= 14V
FN7658 Rev.4.00
Aug 8, 2019
Page 1 of 11
ISL78307
Block Diagram
VIN
EN
CONTROL
LOGIC
+
-
THERMAL
SENSOR
REFERENCE
+
SOFT-START
FET DRIVER
WITH CURRENT
LIMIT
EA
VOUT
ADJ
GND
Pin Configuration
IN
NC
NC
EN
1
2
3
4
ISL78307
(8 LD EPSOIC)
TOP VIEW
8
7
6
5
OUT
ADJ/NC
NC
GND
Pin Descriptions
PIN NUMBER
1
2, 3, 6
4
5
7
8
PIN NAME
IN
NC
EN
GND
ADJ/NC
OUT
EPAD
DESCRIPTION
Input voltage pin. A minimum 0.1µF X5R/X7R capacitor is required for proper operation.
Pins have internal termination and can be left unconnected. Connection to ground is optional.
High on this pin enables the device.
Ground pin.
In the adjustable output voltage option, this pin is connected to the external feedback resistor divider which sets
the LDO output voltage. In the 3.3V and 5V options, this pin is not used and can be connected to ground.
Regulated output voltage. A 10µF X5R/X7R output capacitor is required for stability.
It is recommended to solder the EPAD to the ground plane.
FN7658 Rev.4.00
Aug 8, 2019
Page 2 of 11
ISL78307
Ordering Information
PART NUMBER
(Notes
2, 3)
ISL78307FBEAZ
ISL78307FBEAZ-T
ISL78307FBEAZ-T7A
ISL78307FBEBZ
ISL78307FBEBZ-T
ISL78307FBEBZ-T7A
ISL78307FBECZ
ISL78307FBECZ-T
ISL78307FBECZ-T7A
NOTES:
1. See
TB347
for details about reel specifications.
2. These Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate
plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J-STD-020.
3. For Moisture Sensitivity Level (MSL), see the
ISL78307
device page. For more information about MSL, see
TB363.
PART
MARKING
78307 FBEAZ
78307 FBEAZ
78307 FBEAZ
78307 FBEBZ
78307 FBEBZ
78307 FBEBZ
78307 FBECZ
78307 FBECZ
78307 FBECZ
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +125
ENABLE
PIN
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
OUTPUT
VOLTAGE (V)
3.3
3.3
3.3
5.0
5.0
5.0
ADJ
ADJ
ADJ
TAPE AND REEL
(UNITS) (Note
1)
-
2.5k
250
-
2.5k
250
-
2.5k
250
PACKAGE
(RoHS Compliant)
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
8 Ld EPSOIC
PKG.
DWG. #
M8.15B
M8.15B
M8.15B
M8.15B
M8.15B
M8.15B
M8.15B
M8.15B
M8.15B
FN7658 Rev.4.00
Aug 8, 2019
Page 3 of 11
ISL78307
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +45V
IN Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VCC
OUT Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . .. . .GND - 0.3V to 16V
EN Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VCC
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating
Human Body Model (Tested per JESD22-A114E) . . . . . . . . . . . . . . . . 6kV
Machine Model (Tested per JESD-A115-A) . . . . . . . . . . . . . . . . . . . 350V
Charge Device Model (Tested per AEC-Q100-011) . . . . . . . . . . . . . 2.2kV
Latch-Up (Tested per JESD78B; Class II, Level A) . . . . . . . . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
JC
(°C/W)
8 Ld EPSOIC Package (Notes
4, 5)
. . . . . . .
50
9
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +175°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . -40°C to +125°C
IN Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+3V to +40V
OUT Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+2.5V to +12V
EN Pin to GND Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0V to +40V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions can adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4.
JA
is measured in free air with the component mounted on a high-effective thermal conductivity test board with “direct attach” features. See
TB379.
5. For
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
Recommended Operating Conditions, unless otherwise noted. V
IN
= 14V, I
OUT
= 1mA, C
IN
= 0.1μF,
C
OUT
= 10μF, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical specifications are at T
A
= +25°C. Boldface limits apply across the operating
temperature range, -40°C to +125°C.
PARAMETER
Input Voltage Range
SYMBOL
V
IN
Cold Crank condition
Guaranteed Output
Current
Output Voltage
I
OUT
V
OUT
V
IN
= V
OUT
+ VDO
EN = High
V
IN
= 14V
I
OUT
= 0.1mA
3V
V
IN
40V
I
OUT
= 1mA
3.3V version
5V version
ADJ pin voltage
Line Regulation
Load Regulation
Dropout Voltage
(Note
6)
V
OUT
/V
IN
TEST CONDITIONS
MIN
(Note
8)
6
3
50
3.267
4.950
1.211
3.3
5
1.223
0.04
0.25
10
130
10
120
1.8
I
OUT
= 0mA, ADJ version, V
OUT
= V
ADJ
I
OUT
= 1mA, ADJ version, V
OUT
= V
ADJ
I
OUT
= 10mA, ADJ version, V
OUT
= V
ADJ
I
OUT
= 50mA, ADJ version, V
OUT
= V
ADJ
I
OUT
= 0, 3.3V and 5.0V version
I
OUT
= 1mA, 3.3V and 5.0V version
I
OUT
= 10mA, 3.3V and 5.0V version
I
OUT
= 50mA, 3.3V and 5.0V version
18
22
34
56
22
27
37
62
3.333
5.050
1.235
0.115
0.5
38
340
48
350
3.64
24
42
60
82
28
45
65
90
TYP
MAX
(Note
8)
UNIT
40
40
V
V
mA
V
V
V
%
%
mV
mV
mV
mV
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
OUT
/I
OUT
V
IN
= V
OUT
+V
DO
I
OUT
= 100µA to 50mA
V
DO
I
OUT
= 1mA, V
OUT
= 3.3V
I
OUT
= 50mA, V
OUT
= 3.3V
I
OUT
= 1mA, V
OUT
= 5V
I
OUT
= 50mA, V
OUT
= 5V
Shutdown Current
Quiescent Current
I
SHDN
IQ
EN = LOW
EN = High
V
IN
= 14V
FN7658 Rev.4.00
Aug 8, 2019
Page 4 of 11
ISL78307
Electrical Specifications
Recommended Operating Conditions, unless otherwise noted. V
IN
= 14V, I
OUT
= 1mA, C
IN
= 0.1μF,
C
OUT
= 10μF, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical specifications are at T
A
= +25°C. Boldface limits apply across the operating
temperature range, -40°C to +125°C. (Continued)
PARAMETER
Power Supply
Rejection Ratio
EN FUNCTION
EN Threshold Voltage
V
EN_H
V
EN_L
EN Pin Current
EN to Regulation Time
(Note
7)
PROTECTION FEATURES
Output Current Limit
Thermal Shutdown
Thermal Shutdown
Hysteresis
I
LIMIT
T
SHDN
T
HYST
V
OUT
= 0V
Junction temperature rising
60
118
+165
+20
mA
°C
°C
I
EN
t
EN
V
OUT
= Off to On
V
OUT
= On to Off
V
OUT
= 0V
0.935
0.026
1.65
1.93
1.485
V
V
µA
ms
SYMBOL
PSRR
TEST CONDITIONS
f = 100Hz; Vin_ripple = 500mV
P-P
; load = 50mA
MIN
(Note
8)
TYP
58
MAX
(Note
8)
UNIT
dB
NOTES:
6. Dropout voltage is defined as (V
IN
- V
OUT
) when V
OUT
is 2% below the value of V
OUT
when V
IN
= V
OUT
+ 3V.
7. Enable to Regulation is the time the output takes to reach 95% of its final value with V
IN
= 14V and EN is taken from V
IL
to V
IH
in 5ns. For the
adjustable versions, the output voltage is set at 5V.
8. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
FN7658 Rev.4.00
Aug 8, 2019
Page 5 of 11
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