DA9164.006
14 March 2003
1 (10)
MAS9164
50 mA LDO Voltage Regulator IC
Only 10 A Ground Pin Current at
1 mA Load Current
Good Transient Performance
Low Dropout Voltage: 150 mV
Low Noise
Enable/Disable Control
Stable with Low-ESR Output
Capacitors
DESCRIPTION
MAS9164 is an LDO voltage regulator with low
ground pin current of 10 A, which combined with
the good overall performance, makes MAS9164
highly suitable for providing power to continuously
working low power circuits. The usage of MAS9164
is beneficial especially in the applications where
standby periods are long and in portable devices
where long battery life is essential.
In addition to the low ground pin current, MAS9164
excels in dropout voltage (150 mV typical at 50 mA).
Although MAS9164 does not use an external
bypass capacitor, the noise level (100
Hz...
100 kHz) is only 100 Vrms with 1 F output
capacitor.
The Equivalent Series Resistance (ESR) range of
output capacitors that can be used with MAS9164 is
very wide. This ESR range from a few m up to a
couple of Ohms combined with no minimum output
current requirement makes the usage of MAS9164
easier and low in cost.
Enable/disable pin allows MAS9164 to be turned off
or 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
APPLICATIONS
Extremely Low Current Consumption
Low Minimum Operating Supply Voltage
Output Accuracy <
3.3%
Internal Thermal Shutdown
Short Circuit Protection
Thin SOT (TSOT 5) Package
Output Voltage Option: 1.8 V,
see Ordering Information p. 10
Continuously Working Low Power Circuits
Digital Circuits
Real-Time Clocks (RTC)
SRAMs
CMOS Backup Power
Cellular Phones
Portable Systems
Smoke Detectors
PIN CONFIGURATION
Top View
For Marking Information see
Ordering Information p. 10
1
2
3
5
VIN
VOUT
CTRL
GND
N/C
64AX
4
DA9164.006
14 March 2003
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PIN DESCRIPTION
Pin Name
Pin
Type
Function
VIN
1
P
Power Supply Voltage
GND
2
G
Ground
CTRL
3
I
Enable/Disable Pin for Regulator
N/C
4
-
Not Connected
VOUT
5
O
Output
G = Ground, I = Input, O = Output, P = Power
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
All voltages with respect to ground.
Parameter
Symbol
Conditions
Min
Max
Unit
Supply Voltage
V
IN
-0.3
6
V
Voltage Range for All Pins
-0.3
V
IN
+ 0.3
V
ESD Rating
HBM
2
kV
Junction Temperature
T
Jmax
+175
(limited)
C
Storage Temperature
T
S
-55
+150
C
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
Symbol
Conditions
Min
Max
Unit
Operating Junction
Temperature
T
J
-40
+125
C
Operating Ambient
Temperature
T
A
-40
+85
C
Operating Supply Voltage
V
IN
2.2
5.3
V
CTRL
VIN
VOUT
GND
OVER CURRENT /
OVER TEMPERATURE
PROTECTION
VOLTAGE
REFERENCE
+
N/C
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14 March 2003
3 (10)
ELECTRICAL CHARACTERISTICS
x
Thermal Protection
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Threshold
T
130
150
175
C
x
Control Terminal Specifications
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Control Voltage
OFF State
ON State
V
CTRL
-0.3
1.2
0.5
V
IN
+ 0.3
V
Control Current
I
CTRL
V
CTRL
= 1.2 V
V
CTRL
= 2.8 V
V
CTRL
= 5.3 V
0.07
0.37
0.84
0.7
A
x
Voltage Parameters
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Output Voltage
Tolerance
V
OUT
I
OUT
= 0 mA
I
OUT
= 50 mA
V
OUT(NOM)
0.06
V
OUT(NOM)
0.08
V
OUT(NOM)
+ 0.06
V
OUT(NOM)
+ 0.06
V
Dropout Voltage
V
DROP
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 50 mA
5
50
150
mV
x
Current Parameters
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Continuous Output Current
I
OUT
50
mA
Short Circuit Current
I
MAX
R
L
= 0
150
mA
Peak Output Current
I
PK
V
OUT
> 95% * V
OUT(NOM)
80
mA
Ground Pin Current
I
GND
I
OUT
= 0 mA
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 50 mA
9
10
20
55
A
T
A
= + 27C
0.01
0.5
Ground Pin Current, Sleep
Mode
I
GND
V
CTRL
= 0 V
T
A
= + 85C
0.2
4
A
DA9164.006
14 March 2003
4 (10)
x
Power Dissipation
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Thermal Resistance
(Junction-to-Air)
R
JA
thermal test board according
to JC51-7 (4 layers)
85
C/W
Maximum Power Dissipation
P
d
any ambient temperature
JA
A
(MAX)
J
MAX
d
R
T
T
P
-
=
W
Note 1
Note 1: T
J(MAX)
denotes maximum operating junction temperature (+125C), T
A
ambient temperature, and R
JA
junction-to-air thermal
resistance (+85C/W).
x
Line and Load Regulation
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Line Regulation
V
OUT(NOM)
+ 1 V < V
IN
< 5.3 V,
I
OUT
= 10 mA
1.0
3
mV
Load Regulation
I
OUT
= 1.0 to 50 mA
7.5
20
mV
x
Noise and Ripple Rejection
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Output Noise Voltage
V
RMS
100 Hz < f < 100 kHz,
I
OUT
= 10 mA
100
Vrms
Noise Density
V
N
I
OUT
= 10 mA,
f = 10 kHz
300
nV
/
Hz
I
OUT
= 1 mA
f = 1 kHz
f = 10 kHz
50
30
dB
PSRR
I
OUT
= 10 mA
f = 1 kHz
f = 10 kHz
50
30
dB
x
Dynamic Parameters
T
A
= -40C to +85C, typical values at T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless
otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Start-up Delay
V
CTRL
= 0 to 2.4 V, I
OUT
= 10 mA
(see figure 1 below)
1.5
ms
Overshoot
V
CTRL
= 0 to 2.4 V
1.0
8.0
%
Figure 1.
The definitions of
overshoot and start-up delay.
CTRL
VOUT
50%
start-up delay
90%
overshoot
DA9164.006
14 March 2003
5 (10)
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= +27C, V
IN
= V
OUT(NOM)
+ 1 V, I
OUT
= 1 mA, C
IN
= 1.0 F, C
L
= 1.0 F, V
CTRL
= 2 V, unless otherwise specified.
MAS9164 Typical start-up, V
IN
=2.8 V, C
L
= 1 F
0
0.5
1
1.5
2
2.5
Time (500 s/div)
V
o
l
t
ag
e (
V
)
Vout
Ctrl
MAS9164 Ground pin current vs. load current
and temperature, V
IN
= 2.8 V
0
10
20
30
40
50
60
70
0
5
10
15
20
25
30
35
40
45
50
Load current (mA)
G
r
o
und pin c
u
r
r
e
nt
(
A
)
T = +25C
T = -40C
T = +85C
Figure 2.
Typical start-up.
Figure 3.
Ground pin current vs. load current and temperature.
MAS9162 Load transient, I
OUT
= 1...50 mA (10 s
change time), V
IN
= 2.8 V, C
L
= 1 F
1.65
1.7
1.75
1.8
1.85
1.9
Time (200 s/div)
O
u
t
p
u
t
vo
l
t
ag
e (
V
)
0
50
100
150
200
250
O
u
tp
u
t
c
u
rr
e
n
t (m
A
)
Vout
Iout
MAS9164 Output voltage vs. load current
(operation of the current limiter), V
IN
= 2.8 V
0
0.5
1
1.5
2
0
20
40
60
80
100
120
Load current (mA)
O
u
t
p
u
t
vo
l
t
a
g
e (
V
)
T = +25C
T = -40C
T = +85C
Figure 4.
Load transient response.
Figure 5.
Output voltage vs. load current (the operation of the
current limiter).
MAS9164 Typical output voltage vs. load current,
V
IN
= 2.8 V
1.786
1.788
1.79
1.792
1.794
1.796
1.798
1.8
1.802
0
5
10
15
20
25
30
35
40
45
50
Load current (mA)
O
u
t
p
u
t
vo
l
t
a
g
e (
V
)
T = +25C
T = -40C
T = +85C
MAS9164 Typical PSRR, V
IN
= 2.8 V, C
L
= 1F
0
10
20
30
40
50
60
70
0.1
1
10
100
1000
Frequency (kHz)
P
S
RR (d
B)
Iout = 6.5 mA
Iout = 50 mA
Figure 6.
Typical output voltage vs. load current and
temperature.
Figure 7.
PSRR vs. frequency. I
OUT
= 6.5 mA & I
OUT
= 50 mA.
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