ISL78302 Datasheet, PDF (1/11 Pages) Intersil Corporation – Dual LDO with Low Noise, High Performance and Low IQ

Dual LDO with Low Noise, High Performance and Low I_Q
ISL78302
Features
ISL78302 is a high performance dual LDO capable of sourcing
300mA current from each output. It has a low standby current
and is stable with output capacitance of 1µF to 10µF with ESR of
up to 200mΩ.
The device integrates an individual Power-On-Reset (POR) function for
each output. The POR delay for VO2 can be externally programmed by
connecting a timing capacitor to the CPOR pin. The POR delay for VO1 is
internally fixed at approximately 2ms. A reference bypass pin is also
provided for connecting a noise filtering capacitor for low noise and
high-PSRR applications.
The quiescent current is typically only 47µA with both LDOs
enabled and active. Separate enable pins control each individual
LDO output. When both enable pins are low, the device is in
shutdown, typically drawing less than 0.5µA.
The part operates down to 2.3V and up to 6.5V input. The typical
output voltage can be as low as 1.2V and as high as 3.3V for
each regulator. Please refer to the ordering information section
for standard options. Other voltage selections are available upon
request.
• Integrates Two 300mA High Performance LDOs
• Excellent Transient Response to Large Current Steps
• ±1.8% Accuracy Over All Operating Conditions
• Excellent Load Regulation: < 0.1% Voltage Change Across Full
Range of Load Current
• Extremely Low Quiescent Current: 47µA (Both LDOs Active)
• Wide Input Voltage Capability: 2.3V to 6.5V
• Low Dropout Voltage: Typically 300mV @ 300mA
• Low Output Noise: Typically 37µV_RMS @ 100µA (1.5V)
• Stable with 1µF to 10µF Ceramic Capacitors
• Separate Enable and POR Pins for Each LDO
• Soft-start and Staged Turn-on to Limit Input Current Surge
During Enable
• Current Limit and Over-temperature Protection
• Tiny 10 Lead 3mm x 3mm DFN Package
• TS16949 Compliant
The ISL78302 is both AEC - Q100 rated and fully TS16949
compliant. The ISL78302 is rated for the automotive
temperature range (-40°C to +105°C).
• AEC - Q100 Tested
• Pb-free (RoHS Compliant)
Applications
• Radio Receivers
• Camera Modules
• GPS/Navigation
• Infotainment Systems
Typical Application
VIN (2.3 TO 6.5V)
ON
ENABLE1
OFF ^ON
ENABLE2
OFF
ISL78302
1
VIN
10
VO1
2
EN1
9
VO2
3
EN2
4
CBYP
8
POR2
7
POR1
5
CPOR
6
GND
C1 C2 C3
C4 C5
V_OUT1
V_OUT2 OK
V_OUT2
V_OUT2 TOO LOW
V_OUT1 OK
RESET2
(200ms DELAY,
C3 = 0.01µF)
RESET1
V_OUT1 TOO LOW (2ms DELAY)
January 28, 2011
FN7696.0
C1, C4, C5: 1µF X5R CERAMIC CAPACITOR
C2: 0.01µF X7R CERAMIC CAPACITOR
C3: 0.01µF X7R CERAMIC CAPACITOR
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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