DA9168.002
31 December 2004
MAS9168
150 mA LDO Voltage Regulator IC
•
Only 15.5 µA Ground Pin Current
at 1 mA Load Current
•
Good Transient Performance
•
Low Dropout Voltage
•
Low Noise
•
Enable/Disable Control
•
Stable with Low-ESR Output
Capacitors
This is preliminary information on a new product under
development. Micro Analog Systems Oy reserves the right
to make any changes without notice.
DESCRIPTION
MAS9168 LDO voltage regulator is optimized for
operation at low ground pin current: even at 50 mA
load current its ground pin current is only 40 µA.
This combined with the good overall performance
makes MAS9168 very suitable for providing
continuous supply in low power circuits. The
performance of MAS9168 benefits applications
where standby periods are long and where long
battery lifetime is essential.
In addition to the low ground pin current, MAS9168
excels in dropout voltage (220 mV typical at
150 mA). Even though MAS9168 does not use an
external bypass capacitor, the noise level
(100 Hz… 100 kHz) is only 70 µVrms with 1 µF
output capacitor.
The Equivalent Series Resistance (ESR) range of
output capacitors that can be used with MAS9168
is very wide. This ESR range from zero up to a
couple of Ohms combined with no minimum output
current requirement makes the usage of MAS9168
easier and low in cost.
Enable/disable pin allows MAS9168 to be turned off
and on. In order to save power the device enters
the sleep mode when the regulator is disabled.
An internal thermal protection circuit prevents the
device from overheating. Also the maximum output
current is internally limited.
FEATURES
•
Extremely Low Current Consumption
•
Good Transient Performance
•
Output Accuracy <
±
3.3%
•
Internal Thermal Shutdown
•
Short Circuit Protection
•
Thin SOT (TSOT-5) Package
•
Several Output Voltage Options Available,
see Ordering Information p. 11
APPLICATIONS
•
Continuously Working Low Power Circuits
•
WLAN Chip Sets
•
Digital Circuits
•
Real-Time Clocks (RTC)
•
SRAMs
•
CMOS Backup Power
•
Cellular Phones
•
Portable Systems
•
Smoke Detectors
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DA9168.002
31 December 2004
ABSOLUTE MAXIMUM RATINGS
All voltages with respect to ground.
Parameter
Supply Voltage
Voltage Range for All Pins
ESD Rating
Junction Temperature
Storage Temperature
Symbol
V
IN
Conditions
Min
-0.3
-0.3
Max
6
V
IN
+ 0.3
2
+175
(limited)
Unit
V
V
kV
°C
°C
HBM
T
Jmax
T
S
-55
+150
Stresses beyond those listed may cause permanent damage to the device. The device may not operate under these conditions, but it will
not be destroyed.
RECOMMENDED OPERATING CONDITIONS
All voltages with respect to ground.
Parameter
Operating Junction
Temperature
Operating Ambient
Temperature
Operating Supply
Voltage
Symbol
T
J
T
A
V
IN
Conditions
Min
-40
-40
Max
+125
+85
5.3
Unit
°C
°C
V
V
OUT(NOM)
< 2.2 V
V
OUT(NOM)
≥
2.2 V
2.5
V
OUT(NOM)
+ 0.3 V
ELECTRICAL CHARACTERISTICS
Thermal Protection
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless otherwise
specified.
Parameter
Threshold
Symbol
T
Conditions
Min
130
Typ
150
Max
175
Unit
°C
Control Terminal Specifications
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless otherwise
specified.
Parameter
Control Voltage
OFF State
ON State
Control Current
Symbol
V
CTRL
I
CTRL
Conditions
Min
-0.3
1.2
Typ
Max
0.5
V
IN
+ 0.3
Unit
V
If CTRL-pin is not connected, MAS9168 is in OFF state (4 MΩ pull-down resistor to ground).
V
CTRL
= 1.2 V
V
CTRL
= 2.0 V
V
CTRL
= 3.8 V
0.35
0.70
1.50
µA
1.5
3 (12)
DA9168.002
31 December 2004
Voltage Parameters
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Output Voltage
Tolerance
Dropout Voltage
Symbol
V
OUT
V
DROP
Conditions
I
OUT
= 0 mA
I
OUT
= 150 mA
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 50 mA
I
OUT
= 150 mA
Min
V
OUT(NOM)
– 0.06
V
OUT(NOM)
– 0.10
Typ
Max
V
OUT(NOM)
+ 0.06
V
OUT(NOM)
+ 0.06
Unit
V
1.5
16
75
220
mV
Current Parameters
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Continuous Output Current
Short Circuit Current
Peak Output Current
Ground Pin Current
Symbol
I
OUT
I
MAX
I
PK
I
GND
Conditions
R
L
= 0
Ω
V
OUT
> 95% * V
OUT(NOM)
V
CTRL
= 2.0 V
I
OUT
= 0 mA
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 50 mA
I
OUT
= 150 mA
V
CTRL
= 0 V
T
A
= + 27°C
T
A
= + 85°C
Min
0
Typ
Max
150
400
Unit
mA
mA
mA
µA
350
15
15.5
20
40
100
0.01
0.2
Ground Pin Current, Sleep
Mode
I
GND
0.5
4
µA
Power Dissipation
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Thermal Resistance
(Junction-to-Air)
Maximum Power Dissipation
Symbol
R
JA
P
d
Conditions
thermal test board according
to JESD51-7 (4 layers),
TSOT-5 package
any ambient temperature
Min
Typ
207
Max
Unit
°C/W
W
P
d MAX
=
Note 1
T
J (MAX)
−
T
A
R
JA
Note 1: T
J(MAX)
denotes maximum operating junction temperature (+125°C), T
A
ambient temperature, and R
JA
junction-to-air thermal
resistance specified above.
Line and Load Regulation
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Line Regulation
Load Regulation
Symbol
Conditions
V
OUT(NOM)
+ 1 V < V
IN
< 5.3 V,
I
OUT
= 60 mA
I
OUT
= 1 mA to 50 mA
I
OUT
= 1 mA to 150 mA
Min
Typ
0.5
10
31
Max
Unit
mV
mV
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DA9168.002
31 December 2004
Noise and Ripple Rejection
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Output Noise Voltage
Noise Density
PSRR
Symbol
V
RMS
V
N
Conditions
100 Hz < f < 100 kHz,
I
OUT
= 10 mA
I
OUT
= 10 mA,
f = 10 kHz
I
OUT
= 1 mA
f = 1 kHz
f = 10 kHz
f = 100 kHz
I
OUT
= 150 mA
f = 1 kHz
f = 10 kHz
f = 100 kHz
Min
Typ
70
300
44
30
22
Max
Unit
µVrms
nV
Hz
dB
dB
44
30
22
Dynamic Parameters
T
A
= -40°C to +85°C, typical values at T
A
= +27°C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 µF, C
L
= 1.0 µF, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Start-up Delay
Overshoot
Start-up Time
(settling time of voltage
transient from start-up to
within
±1%
of V
OUT(NOM)
)
Symbol
Conditions
V
CTRL
= 0 to 2 V, I
OUT
= 10 mA
(see figure 1 below)
V
CTRL
= 0 to 2 V
V
CTRL
= 0 to 2 V, I
OUT
= 150 mA
(see figure 1 below)
Min
Typ
0.5
1.0
1.2
Max
Unit
ms
8.0
3.0
%
ms
50%
CTRL
overshoot
90%
VOUT
start-up delay
start-up time
Figure 1.
Definitions of
start-up delay, overshoot
and start-up time.
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Embedded System
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