ISL78302A_14 Datasheet, PDF (5/11 Pages) Intersil Corporation – Dual LDO with Low Noise, Very High PSRR and Low IQ

ISL78302A
Electrical Specifications Unless otherwise noted, all parameters are guaranteed over the operational supply voltage and
temperature range of the device as follows: T_A = -40°C to 105°C; V_IN = (V_O + 0.5V) to 6.5V with a minimum V_IN of 2.3V; C_IN = 1µF; C_O = 1µF;
C_BYP = 0.01µF; C_POR = 0.01µF. Boldface limits apply over the operating temperature range, -40°C to +105°C. (Continued) (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 6) TYP (Note 6) UNITS
Output Noise Voltage
I_O = 100µA, V_O = 1.5V, T_A = +25°C, C_BYP = 0.1µF
BW = 10Hz to 100kHz
30
µV_RMS
DEVICE START-UP CHARACTERISTICS
Device Enable Time
t_EN Time from assertion of the ENx pin to when the output voltage
reaches 95% of the VO (nom)
250 500
µs
LDO Soft-Start Ramp Rate
t_SSR Slope of linear portion of LDO output voltage ramp during start-up
EN1, EN2 PIN CHARACTERISTICS
30 60 µs/V
Input Low Voltage
V_IL
Input High Voltage
V_IH
Input Leakage Current
I_IL, I_IH
Pin Capacitance
C_PIN
POR1, POR2 PIN CHARACTERISTICS
Informative
-0.3
1.35
0.5
V
V_IN + 0.3 V
0.1
µA
5
pF
POR1, POR2 Thresholds
POR1 Delay
POR2 Delay
POR1, POR2 Pin Output Low
Voltage
V_POR+
V_POR-
t_P1LH
t_P1HL
t_P2LH
t_P2HL
V_OL
As a percentage of nominal output voltage
C_POR = 0.01µF
@ I_OL = 1.0mA
91 94 97
%
87 90 93
%
0.5 2.0 3.2
ms
25
µs
100 200 300
ms
25
µs
0.2
V
POR1, POR2 Pin Internal Pull-Up
Resistance
R_POR
78 100 180
kΩ
NOTES:
6. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.
7. VOx = 0.98*VOx(NOM); valid for VOx greater than 1.85V.
EN1
EN2
t_EN
V_POR+
VO1
VO2
POR1
POR2
t_P1LH
t_P2LH
V_POR-
V_POR+
<t_P1HL
<t_P2HL
t_P1HL
t_P2HL
V_POR-
FIGURE 2. TIMING PARAMETER DEFINITION
5
FN7932.1
December 23, 2013