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www.fairchildsemi.com
ILC7082
150mA SOT-23 Low Noise CMOS RF-LDO™
Regulator
Features
•
•
•
•
•
•
•
•
•
•
•
Ultra low 1mV dropout per 1mA load
1% output voltage accuracy
Only 40µV
RMS
noise
Uses low ESR ceramic output capacitor to minimize noise
and output ripple
Only 100µA ground current at 100mA load
Ripple rejection up to 85dB at 1kHz, 60dB at 1MHz
Excellent line and load transient response
Over current / over temperature protection
Guaranteed to 150mA output current
Industry standard five lead SOT-23 package
Fixed 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.1V,
3.2V, 3.3V, 3.6V, 4.5V, 4.7V, 5.0V and adjustable output
voltage options
Metal mask option available for custom voltages between
2.5V and 5.1V
Description
The ILC7082 is a 150mA low dropout (LDO) voltage regu-
lator designed to provide a high performance solution to
low power systems. The device offers a typical combination
of low dropout and low quiescent current expected of
CMOS parts, while uniquely providing the low noise and
high ripple rejection characteristics usually only associated
with bipolar LDO regulators.
The device has been optimized to meet the needs of modern
wireless communications design: low noise, low dropout,
small size, high peak current, high noise immunity.
The ILC7082 is designed to make use of low cost ceramic
capacitors while outperforming other devices that require
tantalum capacitors.
•
Applications
•
•
•
•
Cellular phones
Wireless communicators
PDAs / palmtops / organizers
Battery powered portable electronics
Typical Applications
V
OUT
5
SOT-23-5
4
C
OUT
ILC7082
1
2
3
C
NOISE
V
IN
ON
C
IN
OFF
REV. 1.6.2 11/17/04
ILC7082
Pin Assignments
Fixed Voltage Option
GND
ON/OFF
V
IN
V
IN
1
8
Adjustable Voltage Option
GND
ON/OFF
1
8
C
NOISE
N/C
V
OUT
5
C
NOISE
4
V
OUT
5
V
ADJ
4
V
ADJ
N/C
V
OUT
V
OUT
ILC7082ADJ
ILC7082-xx
2
7
2
7
ILC7082-xx
6
ILC7082ADJ
V
IN
3
3
1
2
3
3
V
OUT
1
2
6
4
5
V
OUT
V
IN
GND ON/OFF
SOT-23-5
V
IN
GND ON/OFF
SOT-23-5
V
IN
4
5
SOIC-8
SOIC-8
Pin Description ILC7082-xx
(Fixed voltage version)
Pin Number
SOIC-8 SOT-23-5 Pin Name
3 and 4
1
2
8
5 and 6
7
1
2
3
4
5
–
V
IN
GND
ON/OFF
C
NOISE
V
OUT
N/C
Connect directly to supply.
Ground pin. Local ground for C
NOISE
and C
OUT
.
By applying less than 0.6V to this pin the device will be turned off.
Optional noise bypass capacitor may be connected between this pin and
GND. Do not connect C
NOISE
directly to the main power ground plane.
Output voltage. Connect C
OUT
between this pin and GND.
Not connected
Pin Description
Pin Description ILC7082-ADJ
(Adjustable voltage version)
Pin Number
SOIC-8 SOT-23-5 Pin Name
3 and 4
1
2
8
5 and 6
7
1
2
3
4
5
–
V
IN
GND
ON/OFF
V
ADJ
V
OUT
N/C
Connect directly to supply.
Ground pin. Local ground for C
NOISE
and C
OUT
.
By applying less than 0.6V to this pin the device will be turned off.
Voltage feedback pin to set the adjustable output voltage. Do not connect a
capacitor to this pin.
Output voltage. Connect C
OUT
between this pin and GND.
Not connected
Pin Description
2
REV. 1.6.2 11/17/04
ILC7082
Internal Block Diagram
V
IN
INTERNAL V
DD
C
NOISE
BANDGAP
REFERENCE
V
REFD
ERROR
AMPLIFIER
TRANS-
CONDUCTANCE
AMPLIFIER
V
OUT
FEEDBACK
GND
ON/OFF
Absolute Maximum Ratings
Parameter
Input Voltage
On/Off Input Voltage
Output Current
Output Voltage
Package Power Dissipation (SOT-23-5)
Maximum Junction Temp Range
Storage Temperature
Operating Ambient Temperature
Package Thermal Resistance
Symbol
V
IN
V
ON/OFF
I
OUT
V
OUT
Ratings
-0.3 to +13.5
-0.3 to
V
IN
Units
V
mA
V
mW
°C
°C
°C
°C/W
Short circuit protected
-0.3 to
V
IN
+0.3
250 (Internally Limited)
-40 to +150
-40 to +125
-40 to +85
333
P
D
T
J(max)
T
STG
T
A
θ
JA
Recommended Operating Conditions
Parameter
Input Voltage
Operating Ambient Temperature
Min.
V
OUT
+V
DO
–40
Typ.
V
OUT
+1
Max.
13
+85
Units
V
°C
REV. 1.6.2 11/17/04
3
ILC7082
Unless otherwise specified, all limits are at T
A
=25°C;
V
IN
= V
OUT(NOM)
+1V,
Ι
OUT
= 1mA, C
OUT
= 1
µ
F, V
ON/OFF
= 2V.
Electrical Characteristics ILC7082AIM5
Parameter
Input Voltage Range
Output Voltage
Symbol
V
IN
V
OUT
Boldface type denotes specifications which apply over the specified operating temperature range.
Conditions
Min
2
-1
-1
-2
1.215
1.202
Typ
V
OUT(NOM)
V
OUT(NOM)
1.240
0.007
0.1
10
50
100
150
95
100
100
100
115
0.1
1.5
0.6
0.3
1
400
500
40
µA
mA
µV
RMS
Max
13
+1
+1
+2
1.265
1.278
0.014
0.032
1
2
25
35
75
100
150
200
225
300
200
220
220
240
220
240
240
260
260
280
2
Units
V
%V
OUT
(NOTM)
1mA < I
OUT
< 150mA
1mA < I
OUT
< 150mA
Feedback Voltage
(ADJ version)
Line Regulation
Dropout Voltage
(Note 3)
V
ADJ
∆
V
OUT
/
V
OUT(NOM)
+1V < V
IN
< 12V
(V
OUT
*
∆
V
IN
)
V
DO
I
OUT
= 0mA (Note 4)
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Ground Pin Current
I
GND
I
OUT
= 0mA
I
OUT
= 10mA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Shutdown (OFF) Current
ON/OFF Input Voltage
ON/OFF Pin Input
Current
Peak Output Current
(Note 4)
Output Noise Voltage
(RMS)
Ripple Rejection
I
ON/OFF
V
ON/OFF
I
IN(ON/OFF)
I
OUT(peak)
eN
V
ON/OFF
= 0V
High = Regulator On
Low = Regulator Off
V
ON/OFF
= 0.6V, regulator OFF
V
ON/OFF
= 2V, regulator ON
V
OUT
> 0.95V
OUT(NOM)
,
tpw = 2ms
BW = 300Hz to 50kHz, C
IN
= 1µF
C
NOISE
= 0.01µF, C
OUT
= 2.2µF,
I
OUT
= 10mA
C
OUT
= 4.7µF, Freq. = 1kHz
I
OUT
= 100mA Freq. = 10kHz
Freq. = 1MHz
V
IN
: V
OUT(NOM)
+ 1V to
V
OUT(NOM)
+ 2V,
tr, tf = 2µs; I
OUT
= 150mA
I
OUT
: 1mA to 150mA; tr, tf = 10µS
V
OUT
= 0V
V
%/V
mV
µA
µA
V
∆V
OUT
/∆V
IN
Dynamic Line Regulation
∆V
OUT(line)
∆V
OUT(load)
I
SC
85
70
60
14
dB
mV
Dynamic Load Regulation
Short Circuit Current
40
600
mV
mA
Notes:
1. Absolute maximum ratings indicate limits which when exceeded may result in damage to the component. Electrical
specifications do not apply when operating the device outside of its rated operating conditions.
2. Specified Min/Max limits are production tested or guaranteed through correlation based on statistical control methods.
Measurements are taken at constant junction temperature as close to ambient as possible using low duty pulse testing.
3. Dropout voltage is defined as the input to output differential voltage at which the output voltage drops 2% below the nominal
value measured with an IV differential.
4. Guaranteed by design
4
REV. 1.6.2 11/17/04
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