DATASHEET
High Performance 1A LDO
ISL80101
Features
The ISL80101 is a low voltage, high current, single output LDO
specified at 1A output current. This LDO operates from input
voltages of 2.2V to 6V. Fixed output voltage options are
available in 1.8V, 2.5V, 3.3V and 5.0V versions. Other custom
voltage options are available upon request. For the adjustable
output version of the ISL80101, please refer to the
ISL80101-ADJ datasheet.
• ±1.8% V
accuracy guaranteed over line, load and
T = -40°C to +125°C
OUT
J
• Very low 130mV dropout voltage at V
• Very fast transient response
• Programmable soft-starting
• Power-good output
= 2.5V
OUT
A submicron BiCMOS process is utilized for this product family
to deliver the best-in-class analog performance and overall
value. This CMOS LDO consumes significantly lower quiescent
current as a function of load compared to bipolar LDOs, which
translates into higher efficiency and packages with smaller
footprints. State-of-the-art internal compensation achieves a
very fast load transient response. An external capacitor on the
soft-start pin provides an adjustable soft-starting ramp. The
ENABLE feature allows the part to be placed into a low
quiescent current shutdown mode. A power-good logic output
signals a fault condition.
• Excellent 65dB PSRR
• Current limit protection
• Thermal shutdown function
• Available in a 10 Ld DFN package
• Pb-free (RoHS compliant)
Applications
• DSP, FPGA and µP core power supplies
• Noise-sensitive instrumentation systems
Table 1 shows the differences between the ISL80101 and
others in its family:
• Post regulation of switched mode power supplies
• Industrial systems
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
• Medical equipment
PROGRAMMABLE
I
ADJ or FIXED
LIMIT
• Telecommunications and networking equipment
• Servers
PART NUMBER
ISL80101-ADJ
ISL80101
I
(DEFAULT)
V
LIMIT
No
OUT
1.75A
ADJ
• Hard disk drives (HD/HDD)
No
1.75A
1.8V, 2.5V,
3.3V, 5.0V
Related Literature
• See AN1592, “ISL80101 High Performance 1A LDO
Evaluation Board User Guide”
ISL80101A
ISL80121-5
Yes
Yes
1.62A
0.75A
ADJ
5.0V
5.4V ± 10%
10µF
5.0V ± 1.8%
10µF
1
2
10
9
140
120
100
80
V
V
V
IN
OUT
V
IN
OUT
C
C
IN
OUT
3
4
10k
R
100k
SENSE
3
R
PG
ISL80101
60
7
6
ENABLE PG
40
V
= 2.5V
20
0
OUT
SS
0.01µF
GND
C
SS
5
0
0.2
0.4
0.6
0.8
1.0
OUTPUT CURRENT (A)
FIGURE 2. DROPOUT vs LOAD CURRENT
FIGURE 1. TYPICAL APPLICATION CIRCUIT
September 25, 2015
FN6931.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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