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ISL78310 Datasheet, PDF (8/13 Pages) Intersil Corporation – High Performance 1A LDO
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ISL78310
Typical Operating Performance
Unless otherwise noted: VIN = 2.2V, VOUT = 1.8V, CIN = COUT = 10µF, TJ = +25°C, IL = 0A. (Continued)
VOLTAGE RAILS AT 50mV/DIV
VIN = 3.7V, VOUT = 3.3V, COUT = 10µF, CPB = 100pF
ENABLE
(2V/DIV)
VOUT (1V/DIV)
VIN = 2.9V, VOUT = 2.5V, COUT = 10µF, CPB = 82pF
VIN = 2.5V, VOUT = 1.8V, COUT = 10µF, CPB = 82pF
VIN = 2.5V, VOUT = 1.5V, COUT = 22µF, CPB = 150pF
VIN = 2.5V, VOUT = 1.2V, COUT = 47µF, CPB = 270pF
1mA
VIN = 2.5V, VOUT = 1.0V, COUT = 47µF, CPB = 220pF
1A
di/dt = 4A/µs
20µs/DIV
FIGURE 9. LOAD TRANSIENT RESPONSE
SS (1V/DIV)
PG (1V/DIV)
(500µs/DIV)
FIGURE 10. ENABLE START-UP
90
80
500mA
70
1A
60
50
100mA
0mA
40
30
20
10
VIN = 2.5V, VOUT = 1.8V, COUT = 10µF, CPB = 82pF
0
100
1k
10k
100k
1M
FREQUENCY (Hz)
FIGURE 11. PSRR vs FREQUENCY
10
1
0.1
0.01
ILOAD = 1A
0.001
10
100
1k
10k 100k 1M 10M
FREQUENCY (Hz)
FIGURE 12. SPECTRAL NOISE DENSITY vs FREQUENCY
8
FN7810.0
February 17, 2011
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