DATASHEET
ISL78302
FN7696
Rev 6.00
November 6, 2014
Dual LDO with Low Noise, High Performance and Low IQ
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.
Features
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 highPSRR applications.
• ±1.8% Accuracy over all operating conditions
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.
• Low output noise: typically 37µVRMS at 100µA (1.5V)
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.
• Soft-start and staged turn-on to limit input current surge
during enable
The ISL78302 is AEC-Q100 qualified at the automotive
temperature range of -40°C to +105°C.
• AEC-Q100 qualified
• Integrates two 300mA high performance LDOs
• Excellent transient response to large current steps
• Excellent load regulation: 1.25V
30
60
µs/V
Slope of linear portion of LDO output voltage ramp during
start-up, VOUT ≤ 1.25V
40
80
µs/V
EN1, EN2 PIN CHARACTERISTICS
Input Low Voltage
VIL
-0.3
0.5
V
Input High Voltage
VIH
1.35
VIN + 0.3
V
0.1
µA
Input Leakage Current
IIL, IIH
Pin Capacitance
CPIN
Informative
5
pF
POR1, POR2 PIN CHARACTERISTICS
POR1, POR2 Thresholds
POR1 Delay
VPOR+
As a percentage of nominal output voltage
91
94
97
%
VPOR-
87
90
93
%
tP1LH
0.5
2.0
3.2
ms
25
tP1HL
POR2 Delay
tP2LH
CPOR = 0.01µF
100
POR1, POR2 Pin Internal Pull-up
Resistance
VOL
300
25
tP2HL
POR1, POR2 Pin Output Low
Voltage
200
µs
at IOL = 1.0mA
RPOR
78
100
ms
µs
0.2
V
180
kΩ
NOTES:
6. VOx = 0.98*VOx(NOM); Valid for VOx greater than 1.85V.
7. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
FN7696 Rev 6.00
November 6, 2014
Page 5 of 13
ISL78302
EN1
EN2
tEN
VPOR+
VPOR-
VPOR+
VPOR-
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