ISL78302_14 Datasheet, PDF (1/13 Pages) Intersil Corporation – Dual LDO with Low Noise, High Performance and Low IQ

DATASHEET
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 an output capacitance of 1µF to 10µF and an
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” on
page 3 for standard options.
The ISL78302 is AEC-Q100 qualified at the automotive
temperature range of -40°C to +105°C.
• 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 at 300mA
• Low output noise: typically 37µV_RMS at 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
• AEC-Q100 qualified
• Pb-free (RoHS Compliant)
Applications
• Radio receivers
• Camera modules
• GPS/navigation
• Infotainment systems
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 TOO LOW
V_OUT1 OK
V_OUT2
RESET2
(200ms DELAY,
C3 = 0.01µF)
RESET1
V_OUT1 TOO LOW (2ms DELAY)
C1, C4, C5: 1µF X5R CERAMIC CAPACITOR
C2: 0.01µF X7R CERAMIC CAPACITOR
C3: 0.01µF X7R CERAMIC CAPACITOR
FIGURE 1. TYPICAL APPLICATION
November 6, 2014
1
FN7696.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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