ISL80101IRAJZ-TK Datasheet, PDF (1/11 Pages) Intersil Corporation – High Performance 1A LDO

High Performance 1A LDO
ISL80101
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.
A sub-micron 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.
Table 1 shows the differences between the ISL80101 and
others in its family:
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ISL80101-ADJ
PROGRAMMABLE
I_LIMIT
No
I_LIMIT
(DEFAULT)
1.75A
ADJ or FIXED
V_OUT
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
Features
• ±0.2% Initial V_OUT Accuracy
• ±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 58dB PSRR at 1kHz
• 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
• See AN1592, “ISL80101 High Performance 1A LDO
Evaluation Board User Guide”
5.4V ± 10%
10µF
C_IN
10k
R₃
10 _VIN
9 _VIN
V_OUT ¹
V_OUT ²
SENSE ³
ISL80101
7 _ENABLE
4
PG
0.01µF
C_SS
6 _SS
GND
5
5.0V ± 1.8%
10µF
C_OUT
100k
R_PG
FIGURE 1. TYPICAL APPLICATION CIRCUIT
140
120
100
80
60
40
20
V_OUT = 2.5V
00
0.2
0.4
0.6
0.8
1.0
OUTPUT CURRENT (A)
FIGURE 2. DROPOUT vs LOAD CURRENT
August 31, 2011
1
FN6931.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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