DATASHEET
ISL80101A
FN7712
Rev 5.00
November 17, 2016
High Performance 1A Linear Regulator with Programmable Current Limiting
The ISL80101A is a low dropout voltage, single output LDO
Features
with programmable current limiting. This LDO operates from
• ±2% V
accuracy guaranteed over line, load and
T = -40°C to +125°C
input voltages of 2.2V to 6V, and is capable of providing output
voltages of 0.8V to 5V. Other custom voltage options are
available upon request.
ADJ
J
• Very low 212mV dropout voltage at V = 4.5V
IN
A submicron BiCMOS process is utilized for this product family
to deliver the best-in-class analog performance and overall
value. The programmable current limiting improves system
reliability of end applications. 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.
• High accuracy current limit programmable up to 1.75A
• Very fast transient response
• 100µV
output noise
RMS
• Power-good output
• Programmable soft-start
• Over-temperature protection
• Small 10 Ld DFN package
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. Quiescent current is modestly compromised to
achieve a very fast load transient response.
Applications
• Telecommunications and networking
• Medical equipment
• Instrumentation systems
• USB devices
Table 1 shows the differences between the ISL80101A and
others in its family:
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
• Gaming
PROGRAMMABLE
I
ADJORFIXED
LIMIT
PART NUMBER
ISL80101-ADJ
ISL80101
I
(DEFAULT)
V
LIMIT
OUT
• Routers and switchers
No
1.75A
ADJ
No
1.75A
1.8V, 2.5V,
3.3V, 5.0V
ISL80101A
ISL80121-5
Yes
Yes
1.62A
0.75A
ADJ
5.0V
5.0V ± 5%
10µF
3.3V
1
10
9
V
V
V
V
IN
IN
OUT
OUT
1.5
1.2
V
= 4.5V
IN
10µF
2
C
C
OUT
IN
2.61k
R
100pF
SET
R
C
3
PB
3
8
10k
100k
I
ADJ
SET
R
1
0.9
0.6
0.464k
ISL80101A
V
= 5.5V
IN
R
2
4
7
6
V
= 5.0V
ENABLE PG
IN
0.3
0.0
SS
0.01µF
GND
C
SS
5
10
100
(kΩ)
1000
R
SET
2.9x2xV – 1
IN
---------------------------------------
~ 1.62 –
I
LIMIT
R
k
SET
FIGURE 1. TYPICAL APPLICATION
FN7712 Rev 5.00
November 17, 2016
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