1
DATASHEET
High Performance 1A LDO
ISL80101-ADJ
The ISL80101-ADJ is a low voltage, high current, single output
LDO specified at 1A output current. This LDO operates from
input voltages from 2.2V to 6V, and is capable of providing
output voltages from 0.8V to 5V. The ISL80101-ADJ features
an adjustable output. For the fixed output version of the
ISL80101-ADJ, please refer to the ISL80101
datasheet.
A submicron BiCMOS process is utilized for this product family
to deliver the best in class analog performance and overall
value. This CMOS LDO will consume 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.
Table 1
shows the differences between the ISL80101-ADJ and
others in its family:
Features
•±1.8% V
OUT
accuracy guaranteed over line, load and
T
J
= -40°C to +125°C
• Very low 130mV dropout voltage at V
OUT
= 2.5V
• Very fast transient response
•Programmable soft-starting
• Power-good output
• 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
• Post regulation of switched mode power supplies
• Industrial systems
• Medical equipment
• Telecommunications and networking equipment
•Servers
• Hard disk drives (HD/HDD)
Related Literature
• AN1592, “ISL80101 High Performance 1A LDO Evaluation
Board User Guide”
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
PROGRAMMABLE
I
LIMIT
I
LIMIT
(DEFAULT)
ADJ OR FIXED
V
OUT
ISL80101-ADJ No 1.75A ADJ
ISL80101 No 1.75A 1.8V, 2.5V,
3.3V, 5.0V
ISL80101A Yes 1.62A ADJ
ISL80121-5 Yes 0.75A 5.0V
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FIGURE 2. DROPOUT vs LOAD CURRENT
V
IN
PGENABLE
SS
GND
V
IN
1
2
5
4
7
10
9
6
10k
100k
10µF
2.5V ± 10%
1.8V
ADJ
2.61k
1.00k
ISL80101-ADJ
C
SS
C
PB
C
OUT
R
3
0.01µF
R
2
R
1
82pF
3
10µF
C
IN
V
OUT
V
OUT
R
PG
0
20
40
60
80
100
120
140
0 0.2 0.4 0.6 0.8 1.0
OUTPUT CURRENT (A)
DROPOUT VOLTAGE (mV)
V
OUT
= 2.5V
August 26, 2015
FN7834.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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