|
|
PDF ISL78310 Data sheet ( Hoja de datos )
| Número de pieza | ISL78310 | |
| Descripción | High Performance 1A LDO | |
| Fabricantes | Intersil | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL78310 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
DATASHEET
High Performance 1A LDO
ISL78310
The ISL78310 is a low dropout voltage, high-current, single
output LDO specified for 1A output current. This part operates
from input voltages down to 2.2V and up to 6V. The part offers
fixed and external resistor adjustable output voltages from 0.8V
to 5V. Custom voltage options are available upon request.
For applications that desire to set the in-rush current to less than
the current limit of the part, or for applications that require
turn-on time control, an external capacitor can be placed on the
soft-start pin for maximum control. A supply-independent
ENABLE signal allows the part to be placed into a low quiescent
current shutdown mode. Sub-micron CMOS process is used for
this product family to deliver best-in-class analog performance
and overall value.
This CMOS LDO consumes significant lower quiescent (ground pin)
current as a function of load over bipolar LDOs, which translates into
higher efficiency and packages with smaller footprints. Quiescent
current is optimized to achieve a very fast load transient response.
The ISL78310 is AEC-Q100 rated. The ISL78310 is rated for the
automotive temperature range (-40°C to +125°C).
Applications
• Core & I/O power
• Camera modules
• Post regulation of switched supplies
• Radio systems
• Infotainment systems
Features
• 2.2V to 6V input supply
• 130mV dropout voltage typical (at 1A)
• Fast load transient response
• ±0.2% initial VOUT accuracy
• Adjustable in-rush current limiting
• 58dB typical PSRR
• 63µVRMS output noise at VOUT = 1.8V
• Power-good feature
• 500mV feedback voltage
• Supply-independent 1V enable input threshold
• Short-circuit current protection
• 1A peak reverse current
• Over-temperature shutdown
• Any cap stable with minimum 10µF ceramic
• ±1.8% guaranteed VOUT accuracy for junction temperature
range from -40°C to +125°C
• Available in a 10 Lead DFN package
• Pb-free (RoHS compliant)
• AEC-Q100 qualified
Pin Configuration
ISL78310
(10 LD 3x3 DFN)
TOP VIEW
VOUT 1
VOUT 2
SENSE/ADJ 3
PG 4
GND 5
PAD
10 VIN
9 VIN
8 NC
7 ENABLE
6 SS
November 7, 2014
FN7810.2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2011, 2013, 2014. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL78310
Absolute Maximum Ratings
VIN relative to GND (Note 6) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to + 6.5V
VOUT relative to GND (Note 6). . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to + 6.5V
PG, ENABLE, SENSE/ADJ, SS
Relative to GND (Note 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to + 6.5V
Recommended Operating Conditions (Notes 9, 10)
Junction Temperature Range (TJ) (Note 9) . . . . . . . . . . . .-40°C to +125°C
VIN relative to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2V to 6V
VOUT range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mV to 5V
PG, ENABLE, SENSE/ADJ, SS relative to GND . . . . . . . . . . . . . . .0V to + 6V
PG Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
Thermal Information
Thermal Resistance . . . . . . . . . . . . . . . . . . . . JA (°C/W) JC (°C/W)
10 Ld DFN Package (Notes 7, 8) . . . . . . . .
48
7
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
ESD Rating
Human Body Model (Tested per JESD22-A114E) . . . . . . . . . . . . . . . . .2.5kV
Machine Model (Tested per JESD-A115-A) . . . . . . . . . . . . . . . . . . . . . 250V
Charge Device Model (Tested per AEC-Q100-011) . . . . . . . . . . . . . . . . . 1kV
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
6. Absolute maximum voltage rating is defined as the voltage applied for a lifetime average duty cycle above 6V of 1%.
7. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
8. For JC, the “case temp” location is the center of the exposed metal pad on the package underside.
9. Extended operation at these conditions may compromise reliability. Exceeding these limits will result in damage. Recommended operating conditions
define limits where specifications are guaranteed.
10. Electromigration specification defined as lifetime average junction temperature of +110°C where max rated DC current = lifetime average current.
Electrical Specifications Unless otherwise noted, VIN = VOUT + 0.4V, VOUT = 1.8V, CIN = COUT = 10µF, TJ = +25°C, ILOAD = 0A.
Applications must follow thermal guidelines of the package to determine worst case junction temperature. Please refer to “ISL78310 Schematic Block
Diagram” on page 4 and Tech Brief TB379. Boldface limits apply across the operating temperature range, -40°C to +125°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 11)
MAX
TYP (Note 11)
UNITS
DC CHARACTERISTICS
DC Output Voltage Accuracy
Feedback Pin (ADJ Option Only)
DC Input Line Regulation
DC Output Load Regulation
Feedback Input Current
Ground Pin Current
Ground Pin Current in Shutdown
Dropout Voltage (Note 12)
Output Short Circuit Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
(Rising Threshold)
VOUT
VADJ
VOUT/
VIN
VOUT/
IOUT
IQ
ISHDN
VDO
OCP
TSD
TSDn
VOUT Options: 0.8V, 1.2V, 1.5V and 1.8V
2.2V VIN < 3.6V; 0A < ILOAD 1A
VOUT Options: 2.5V, 3.3V and 5.0V
VOUT + 0.4V VIN 6V; 0A < ILOAD < 1A
2.2V VIN 6V, 0A < ILOAD < 1A
VOUT + 0.5V < VIN < 5V
0A < ILOAD < 1A, All voltage options
VADJ = 0.5V
ILOAD = 0A, 2.2V < VIN < 6V
ILOAD = 1A, 2.2V < VIN < 6V
ENABLE Pin = 0V, VIN = 6V
ILOAD = 1A, VOUT = 2.5V
VOUT = 0V, 2.2V < VIN < 6V
2.2V < VIN < 6V
2.2V < VIN < 6V
-1.8 0.2 1.8
-1.8 0.2 1.8
491 500 509
1
-1
0.01
3
5
0.2
130
1.75
160
30
1
5
7
12
212
%
%
mV
%
%
µA
mA
mA
µA
mV
A
°C
°C
AC CHARACTERISTICS
Input Supply Ripple Rejection
Output Noise Voltage
PSRR
f = 1kHz, ILOAD = 1A; VIN = 2.2V
f = 120Hz, ILOAD = 1A; VIN = 2.2V
ILOAD = 1A, BW = 10Hz < f < 100kHz
58 dB
72 dB
63 µVRMS
Submit Document Feedback
5
FN7810.2
November 7, 2014
5 Page 
ISL78310
IOUT (1A/DIV)
IOUT (1A/DIV)
VOUT (1V/DIV)
TIME (1ms/DIV)
FIGURE 14. IN-RUSH CURRENT WITH NO CSS, COUT = 1000µF,
IN-RUSH CURRENT = 1.8A
VOUT (1V/DIV)
TIME (2ms/DIV)
FIGURE 15. IN-RUSH CURRENT WITH CSS = 15nF, COUT = 1000µF,
IN-RUSH CURRENT = 0.5A
IOUT (1A/DIV)
VOUT (1V/DIV)
TIME (2ms/DIV)
FIGURE 16. IN-RUSH CURRENT WITH CSS = 33nF, COUT = 1000µF, IN-RUSH CURRENT = 0.2A
Equation 3 can be used to calculate CSS for a desired in-rush
current, where VOUT is the output voltage, COUT is the total
capacitance on the output, and IINRUSH is the desired in-rush
current.
CSS = ---V----O--I--I-UN----T-R---x-U--C--S---O-H---U-x---T-0---.x--5-2--V------A-----
(EQ. 3)
The scopes in Figures 14, 15 and 16 capture the response for the
soft-start function. The output voltage is set to 1.8V.
The external capacitor is always discharged to ground at the
beginning of start-up or enabling.
Power-Good Operation
The PGOOD is a logic output that indicates the status of VOUT.
The PGOOD flag is an open-drain NMOS that can sink 10mA
during a fault condition. The PGOOD pin requires an external
pull-up resistor, which is typically connected to the VOUT pin. The
PGOOD pin should not be pulled up to a voltage source greater
than VIN. The PGOOD goes low when the output voltage drops
below 84% of the nominal output voltage or if the part is
disabled. The PGOOD comparator functions during current limit
and thermal shutdown. For applications not using this feature,
connect this pin to ground.
Output Voltage Selection
An external resistor divider is used to scale the output voltage
relative to the internal reference voltage. This voltage is then fed
back to the error amplifier. The output voltage can be
programmed to any level between 0.8V and 5V. An external
resistor divider, R1 and R2, is used to set the output voltage as
shown in Equation 4. The recommended value for R2 is 500 to
1kR1is then chosen according to Equation 5.
VOUT
=
0.5 V
R-R----12-
+
1
(EQ. 4)
R1
=
R2
-V-0---O.--5--U--V--T--
–
1
(EQ. 5)
Submit Document Feedback 11
FN7810.2
November 7, 2014
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ISL78310.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL78310 | High Performance 1A LDO | Intersil |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |