ISL80101-ADJ_15 Datasheet, PDF (1/12 Pages) Intersil Corporation – High Performance 1A LDO

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:
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
• ±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”
2.5V ± 10%
10µF
C_IN
10k
R₃
10 _VIN
9 _VIN
V_OUT ¹
V_OUT ²
82pF
C_PB
ADJ ³
ISL80101-ADJ
7 _{ENABLE PG} ⁴
0.01µF
C_SS
6 _SS
GND
5
2.61k
R₂
1.00k
R₁
1.8V
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 26, 2015
1
FN7834.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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