ISL80111_15 Datasheet, PDF (1/17 Pages) Intersil Corporation – Ultra Low Dropout 1A, 2A, 3A Low Input Voltage NMOS LDOs

Ultra Low Dropout 1A, 2A, 3A Low Input Voltage NMOS
LDOs
ISL80111, ISL80112, ISL80113
The ISL80111, ISL80112, and ISL80113 are ultra low dropout
LDOs providing the optimum balance between performance, size
and power consumption in size constrained designs for data
communication, computing, storage and medical applications.
These LDOs are specified for 1A, 2A and 3A of output current and
are optimized for low voltage conversions.Operating with a V_IN of
1V to 3.6V and with a legacy 3.3V to 5V on the BIAS, the V_OUT is
adjustable from 0.8V to 3.3V. With a V_IN PSRR greater than 40dB
at 100kHz makes these LDOs an ideal choice in noise sensitive
applications. The guaranteed ±1.6% V_OUT accuracy overall
conditions lends these parts to suppling an accurate voltage to
the latest low voltage digital ICs.
An enable input allows the part to be placed into a low quiescent
current shutdown mode. A submicron CMOS process is utilized for
this product family to deliver best-in-class analog performance
and overall value for applications in need of input voltage
conversions typically below 2.5V. It also has the superior load
transient regulation unique to a NMOS power stage. These LDOs
consume significantly lower quiescent current as a function of
load compared to bipolar LDOs.
Features
• Ultra low dropout: 75mV at 3A, (typ)
• Excellent V_IN PSRR: 70dB at 1kHz (typ)
• ±1.6% guaranteed V_OUT accuracy for -40ºC < T_J < +125ºC
• Very fast load transient response
• Extensive protection and reporting features
• V_IN range: 1V to 3.6V, V_OUT range: 0.8V to 3.3V
• Small 10 Ld 3x3 DFN package
Applications
• Noise-sensitive instrumentation and medical systems
• Data acquisition and data communication systems
• Storage, telecommunications and server equipment
• Low voltage DSP, FPGA and ASIC core power supplies
• Post-regulation of switched mode power supplies
1.2V ±5%
VIN
3.3V ±10%
VBIAS
C_IN
10µF
ISL80111, ISL80112, ISL80113
9 _VIN
10 _VIN
VOUT ¹
VOUT ²
C_BIAS
1µF
4 _VBIAS
PG ⁶
EN
OPEN DRAIN COMPATIBLE
7 _ENABLE
GND
5
ADJ ³
C_OUT
10µF
1.0V
VOUT
R₃
1.0kΩ
PGOOD
R₄
1.0kΩ
FIGURE 1. TYPICAL APPLICATION SCHEMATIC
100
90
3A
80
70
60
2A
50
40
1A
30
20
10
0
-40
25
85
125
TEMPERATURE (°C)
FIGURE 2. DROPOUT VOLTAGE OVER-TEMP AND I_OUT
100
1.015
80
60
I_OUT = 2A
40
BIAS = 5V
20 ^VIN ^{= 3.3V}
V_OUT = 2.5V
C_OUT = 10µF
0
100
1k
I_OUT = 1A
I_OUT = 3A
I_OUT = 0A
10k
100k
1M
FREQUENCY (Hz)
1.010
1.005
1.000
0.995
0.990
0.985
-40
0
25
85
125
TEMPERATURE (°C)
FIGURE 3. V_IN PSRR vs LOAD CURRENT (ISL80113)
FIGURE 4. ΔV_ADJ vs TEMPERATURE
November 1, 2013
1
FN7841.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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