ISL80510 Datasheet, PDF (1/13 Pages) Intersil Corporation – High Performance 1A LDO

DATASHEET
High Performance 1A LDO
ISL80510
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.
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
MAX OUTPUT CURRENT
ISL80510
1.0A
ISL80505
0.5A
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)
VIN
C_IN
C_SS
ISL80510
V_IN
8
V_IN
7
SS ₆
ENABLE
5
EPAD
V_OUT
1
V_OUT
2
FB
3
GND
4
VOUT
C_OUT
R_{1 CPB}
(optional)
R₂
FIGURE 1. TYPICAL APPLICATION CIRCUIT
80
70
60
I_OUT = 0.6A
50
40
30
V_IN = 2.3V
V_OUT = 1.8V
20
C_OUT = 10µF
C_PB= 10nF
10 ^{R1 = 2.61kΩ}
R₂ = 1kΩ
0
100
1k
I_OUT = 1A
I_OUT = 0.2A
10k
100k
1M
FREQUENCY (Hz)
FIGURE 2. PSRR
July 28, 2015
1
FN8767.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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