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www.fairchildsemi.com
ILC7083/ILC7084
150mA SOT-23 Low Noise CMOS RF-LDO™
Regulator
Features
•
•
•
•
•
•
•
•
•
•
•
Ultra low 1mV dropout per 1mA load
3% 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, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 5V output
voltage for ILC7083 and adjustable output voltage for
ILC7083/ILC7084
Metal mask option available for custom voltages between
2.5V and 5.1V
Description
The ILC7083/ILC7084 is a 150mA low dropout (LDO)
voltage regulator 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 ILC7083/ILC7084 is designed to make use of low cost
ceramic capacitors while outperforming other devices that
require tantalum capacitors.
As opposed to ILC7084, the ILC7083 has a built in output
capacitor discharge circuit active in shutdown mode. This
feature is necessary in applications where the output voltage
must decrease quickly to zero volt in shutdown mode.
•
Applications
•
•
•
•
Cellular phones
Wireless communicators
PDAs / palmtops / organizers
Battery powered portable electronics
Typical Applications
V
OUT
5
SOT-23-5
4
C
OUT
ILC7083
1
2
3
C
NOISE
V
IN
ON
C
IN
OFF
REV. 1.0.9 1/28/03
ILC7083/ILC7084
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
2
7
2
7
ILC7083-xx
3
6
ILC7083-xx
V
OUT
1
2
3
ILC7083ADJ
or ILC7084ADJ
1
2
3
ILC7083ADJ
V
IN
V
IN
3
6
4
5
V
OUT
V
IN
GND ON/OFF
SOT-23-5
V
IN
GND ON/OFF
SOT-23-5
4
5
SOIC-8
SOIC-8
Pin Description ILC7083-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 ILC7083-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. 1.0.9 1/28/03
ILC7083/ILC7084
Internal Block Diagram
V
IN
C
NOISE
BANDGAP
REFERENCE
V
REFD
ERROR
AMPLIFIER
TRANS-
CONDUCTANCE
AMPLIFIER
INTERNAL V
DD
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
Package Thermal Resistance
Symbol
V
IN
V
ON/OFF
I
OUT
V
OUT
P
D
T
J(max)
T
STG
θ
JA
Ratings
-0.3 to +13.5
-0.3 to V
IN
Short circuit protected
-0.3 to V
IN
+ 0.3
250 (Internally Limited)
-40 to +150
-40 to +125
333
Units
V
mA
V
mW
°C
°C
°C/W
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. 1.0.9 1/28/03
3
ILC7083/ILC7084
Electrical Characteristics ILC7083/ILC7084
Unless otherwise specified, all limits are at T
A
=25°C; V
IN
= V
OUT(NOM)
+1V, I
OUT
= 1mA, C
OUT
= 1µF, V
ON/OFF
= 2V.
Boldface type denotes specifications which apply over the specified operating temperature range.
Parameter
Input Voltage Range
Output Voltage
Feedback Voltage
(ADJ version)
Line Regulation
Dropout Voltage
(Note 3)
Symbol
V
IN
V
OUT
V
ADJ
∆
V
OUT
/
(V
OUT
*
∆
V
IN
)
V
IN
– V
OUT
V
OUT(NOM)
+1V < V
IN
< 12V
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)
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
Freq. = 1kHz
C
OUT
= 4.7µF,
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 < 5µS
V
OUT
= 0V
Conditions
1mA < I
OUT
< 150mA
1mA < I
OUT
< 150mA
Min
2
-3
-4
1.217
1.204
Typ
V
OUT(NOM)
V
OUT(NOM)
1.255
0.007
0.1
10
50
100
150
95
100
100
100
115
0.1
1.5
0.6
0.3
1
500
40
µA
mA
µV
RMS
Max
13
+3
+4
1.292
1.305
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
(NOM)
V
%/V
mV
µA
µA
400
Ripple Rejection
∆
V
OUT
/
∆
V
IN
Dynamic Line Regulation
∆
V
OUT(line)
85
70
60
14
dB
mV
Dynamic Load Regulation
Short Circuit Current
∆V
OUT(load)
I
SC
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. 1.0.9 1/28/03
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