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
ISL80101
ISL80101A
ISL80121-5
PROGRAMMABLE
I
LIMIT
No
No
Yes
Yes
I
LIMIT
(DEFAULT)
1.75A
1.75A
1.62A
0.75A
ADJ or FIXED
V
OUT
ADJ
1.8V, 2.5V,
3.3V, 5.0V
ADJ
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
R
3
10
9
V
IN
V
IN
V
OUT
V
OUT
1
2
5.0V ± 1.8%
DROPOUT VOLTAGE (mV)
10µF
C
OUT
140
120
100
80
60
40
20
0
0
0.2
0.4
0.6
V
OUT
= 2.5V
0.8
1.0
SENSE
ISL80101
7
6
3
100k
R
PG
ENABLE
SS
GND
5
PG
4
0.01µF
C
SS
OUTPUT CURRENT (A)
FIGURE 1. TYPICAL APPLICATION CIRCUIT
FIGURE 2. DROPOUT vs LOAD CURRENT
August 31, 2011
FN6931.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Copyright Intersil Americas Inc. 2009, 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
ISL80101
Block Diagram
V
IN
EN
CONTROL
LOGIC
-
EA
PG
THERMAL
SENSOR
REFERENCE
+
SOFT-START
+
FET DRIVER
WITH CURRENT
LIMIT
V
OUT
SS
ADJ
SENSE
PG
+
-
GND
Ordering Information
PART NUMBER
(Notes 1, 3, 4)
ISL80101IR18Z
ISL80101IR25Z
ISL80101IR33Z
ISL80101IR50Z
ISL80101EVAL2Z
NOTES:
1. Add “-T*” for Tape and Reel. Please refer to
TB347
for details on reel specifications.
2. For other output voltages, contact Intersil Marketing.
3. 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.
4. For Moisture Sensitivity Level (MSL), please see device information page for
ISL80101.
For more information on MSL please see Technical Brief
TB363.
PART MARKING
DZEB
DZFB
DZGB
DZHB
Evaluation Board
V
OUT
VOLTAGE
(Note 2)
1.8V
2.5V
3.3V
5.0V
TEMP RANGE (°C)
-40 to +125
-40 to +125
-40 to +125
-40 to +125
PACKAGE
(Pb-Free)
10 Ld 3x3 DFN
10 Ld 3x3 DFN
10 Ld 3x3 DFN
10 Ld 3x3 DFN
PKG DWG. #
L10.3x3
L10.3x3
L10.3x3
L10.3x3
2
FN6931.1
August 31, 2011
ISL80101
Pin Configurations
ISL80101
(10 LD 3X3 DFN)
TOP VIEW
V
OUT
1
V
OUT
2
SENSE 3
PG 4
GND 5
EPAD
10 V
IN
9 V
IN
8 NC
7 ENABLE
6 SS
Pin Descriptions
PIN NUMBER
1, 2
3
4
5
6
7
8
9, 10
-
PIN NAME
V
OUT
SENSE
PG
GND
SS
ENABLE
NC
V
IN
EPAD
DESCRIPTION
Regulated output voltage. A minimum 10µF X5R/X7R output capacitor is required for stability. See “External
Capacitor Requirements” on page 8 for more details.
The PGOOD circuit uses this input to monitor the output voltage status, providing a remote voltage sense.
This is an open drain logic output used to indicate the status of the output voltage. Logic low indicates V
OUT
is not
in regulation. This pin must be grounded if not used.
Ground.
External capacitor on this pin adjusts startup ramp and controls inrush current.
V
IN
independent chip enable. TTL and CMOS compatible.
No connection. Leave floating.
Input supply. A minimum of 10µF X5R/X7R input capacitor is required for proper operation. See “External
Capacitor Requirements” on page 8 for more details.
EPAD at ground potential. It is recommended to solder the EPAD to the ground plane.
3
FN6931.1
August 31, 2011
ISL80101
Absolute Maximum Ratings
V
IN
Relative to GND (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
V
OUT
Relative to GND (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
PG, ENABLE, SENSE, SS
Relative to GND (Note 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
ESD Rating
Human Body Model (Tested per JESD22 A114F) . . . . . . . . . . . . . . .2.5kV
Machine Model (Tested per JESD22 A115C) . . . . . . . . . . . . . . . . . 250V
Latch Up (Tested per JESD78C, Class 2, Level A) . . . . . ±100mA at +85°C
Thermal Information
Thermal Resistance (Typical)
θ
JA
(°C/W)
θ
JC
(°C/W)
10 Ld DFN Package (Notes 6, 7) . . . . . . . .
48
7
Storage Temperature Range. . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
(Notes 8, 9)
Junction Temperature Range (TJ) (Note 8) . . . . . . . . . . . .-40°C to +125°C
V
IN
Relative to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2V to 6V
V
OUT
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mV to 5V
PG, ENABLE, SENSE/ADJ, SS relative to GND . . . . . . . . . . . . . . . . 0V to 6V
PG Sink Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <10mA
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
5. Absolute maximum voltage rating is defined as the voltage applied for a lifetime average duty cycle above 6V of 1%.
6.
θ
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief
TB379.
7. For
θ
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
8. Extended operation at these conditions may compromise reliability. Exceeding these limits will result in damage. Recommended operating conditions
define limits where specifications are guaranteed.
9. Electromigration specification defined as lifetime average junction temperature of +110°C where max rated DC current = lifetime average current.
Electrical Specifications
Unless otherwise noted, V
IN
= V
OUT
+ 0.4V, V
OUT
= 1.8V, C
IN
= C
OUT
= 2.2µF, T
J
= +25°C. Applications
must follow thermal guidelines of the package to determine worst case junction temperature. Please refer to “Applications Information” on
page 8 and Tech Brief
TB379.
Boldface limits apply over the operating temperature range, -40°C to +125°C.
PARAMETER
DC CHARACTERISTICS
DC Output Voltage Accuracy
DC Input Line Regulation
DC Output Load Regulation
Ground Pin Current
V
OUT
ΔV
OUT
/
ΔV
IN
ΔV
OUT
/
ΔI
OUT
I
Q
I
SHDN
V
DO
OCP
TSD
TSDn
V
OUT
+ 0.4V < V
IN
< 6V, 0A < I
LOAD
< 1A
V
OUT
+ 0.4V < V
IN
< 6V
0A < I
LOAD
< 1A, All voltage options
I
LOAD
= 0A, 2.2V < V
IN
< 6V
I
LOAD
= 1A, 2.2V < V
IN
< 6V
Ground Pin Current in Shutdown
Dropout Voltage (Note
11
)
Output Short Circuit Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
(Rising Threshold)
ENABLE Pin = 0.2V, V
IN
= 6V
I
LOAD
= 1A, V
OUT
= 2.5V
V
OUT
= 0V, 2.2V < V
IN
< 6V
2.2V < V
IN
< 6V
2.2V < V
IN
< 6V
-1
3
5
0.2
130
1.75
160
30
5
7
12
212
-1.8
1.8
1
%
%
%
mA
mA
µA
mV
A
°C
°C
SYMBOL
TEST CONDITIONS
MIN
(Note 10)
TYP
MAX
(Note 10)
UNITS
AC CHARACTERISTICS
Input Supply Ripple Rejection
PSRR
f = 1kHz, I
LOAD
= 1A; V
IN
= 2.2V
f = 120Hz, I
LOAD
= 1A; V
IN
= 2.2V
Output Noise Voltage
I
LOAD
= 1A, BW = 10Hz < f < 100kHz
2.2V < V
IN
< 6V
2.2V < V
OUT
+ 0.4V < 6V
0.3
10
58
72
63
dB
dB
µV
RMS
1
200
V
mV
ENABLE PIN CHARACTERISTICS
Turn-on Threshold
Hysteresis (Rising Threshold)
0.8
80
4
FN6931.1
August 31, 2011
ISL80101
Unless otherwise noted, V
IN
= V
OUT
+ 0.4V, V
OUT
= 1.8V, C
IN
= C
OUT
= 2.2µF, T
J
= +25°C. Applications
must follow thermal guidelines of the package to determine worst case junction temperature. Please refer to “Applications Information” on
page 8 and Tech Brief
TB379.
Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
ENABLE Pin Turn-on Delay
ENABLE Pin Leakage Current
Electrical Specifications
SYMBOL
TEST CONDITIONS
C
OUT
= 10µF, I
LOAD
= 1A
V
IN
= 6V, ENABLE = 3V
MIN
(Note 10)
TYP
100
MAX
(Note 10)
1
UNITS
µs
µA
SOFT-START CHARACTERISTICS
SS Pin Currents (Note 11)
IPD
ICHG
V
IN
= 3.5V, ENABLE = 0V, SS = 1V
0.5
-3.3
1
-2
1.3
-0.8
mA
µA
PG PIN CHARACTERISTICS
V
OUT
PG Flag Threshold
V
OUT
PG Flag Hysteresis
PG Flag Low Voltage
PG Flag Leakage Current
NOTES:
10. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
11. Dropout is defined as the difference in supply V
IN
and V
OUT
when the output is below its nominal regulation..
V
IN
= 2.5V, I
SINK
= 500µA
V
IN
= 6V, PG = 6V
75
85
4
100
1
92
%V
OUT
%
mV
µA
5
FN6931.1
August 31, 2011
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