FN8767 Rev 0.00 Page 1 of 13
July 28, 2015
FN8767
Rev 0.00
July 28, 2015
ISL80510
High Performance 1A LDO
DATASHEET
The ISL80510 is a single output Low Dropout voltage regulator
(LDO) capable of sourcing up to 1A output current. This LDO
operates from input voltages of 2.2V to 6V. The output voltage
of ISL80510 can be programmed from 0.8V to 5.5V.
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 and excellent PSRR. The ISL80510
provides an output accuracy of ±1.8% V
OUT
accuracy over all
load, line and temperature variation (T
J
= -40°C to +125°C).
An external capacitor on the soft-start pin provides an
adjustable soft starting of the output voltage ramp to control
the inrush current. The ENABLE feature allows the part to be
placed into a low quiescent current shutdown mode.
Table 1 shows the differences between the ISL80510 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
• Stable with a 4.7µF output ceramic capacitor
• Very fast transient response
• Programmable output soft-start time
• Excellent PSRR over wide frequency range
• Current limit protection
•Thermal shutdown function
• Available in an 8 Ld DFN package
• Pb-free (RoHS compliant)
Applications
• 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)
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER MAX OUTPUT CURRENT
ISL80510 1.0A
ISL80505 0.5A
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FIGURE 2. PSRR
VIN
VOUT
ISL80510
C
SS
C
OUT
(optional)
C
IN
R
1
R
2
2
3
4
1
5
8
7
6
V
OUT
FB
GND
V
IN
V
IN
ENABLE
SS
EPAD
V
OUT
C
PB
0
10
20
30
40
50
60
70
80
100 1k 10k 100k 1M
I
OUT
= 0.2A
I
OUT
= 0.6A
I
OUT
= 1A
PSRR (dB)
FREQUENCY (Hz)
V
IN
= 2.3V
V
OUT
= 1.8V
C
PB
= 10nF
R
1
= 2.61kΩ
R
2
= 1kΩ
C
OUT
= 10µF
ISL80510
FN8767 Rev 0.00 Page 2 of 13
July 28, 2015
Ordering Information
Block Diagram
FIGURE 3. BLOCK DIAGRAM
PART NUMBER
(Notes 1
, 2, 3)
PART
MARKING
TEMP RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG
DWG. #
ISL80510IRAJZ 0510 -40 to +125 8 Ld 3x3 DFN L8.3X3J
ISL80510EVAL1Z Evaluation Board
NOTES:
1. Add “-T*” for Tape and Reel. Please refer to TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL80510
. For more information on MSL please see Technical Brief
TB363
.
REFERENCE
+
SOFT-START
CONTROL
LOGIC
THERMAL
SENSO R
FET DRIVER
WITH CURRENT
LIMIT
-
+
EA
V
OUT
SS
FB
-
+
E
A
ENABLE
GND
V
IN