DA9161.010
28 January 2004
MAS9161
80 mA LDO Voltage Regulator IC
•
Only 10.5 µA Ground Pin Current
at 1 mA Load Current
•
Good Transient Performance
•
Low Dropout Voltage: 200 mV
•
Low Noise
•
Enable/Disable Control
•
Stable with Low-ESR Output
Capacitors
DESCRIPTION
MAS9161 LDO voltage regulator is optimized for
operation at low ground pin current of just 10.5 µA.
This combined with the good overall performance
makes MAS9161 very suitable for providing
continuous supply in low power circuits. The
performance of MAS9161 benefits applications
where standby periods are long and where long
battery life is essential.
In addition to the low ground pin current, MAS9161
excels in dropout voltage (200 mV typical at
80 mA). Even though MAS9161 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 MAS9161
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 MAS9161
easier and low in cost.
Enable/disable pin allows MAS9161 to be turned off
and on. In order to save power the device enters
the sleep mode when the regulator is disabled.
MAS9161A also includes an auto-discharge
function, wherein a shutdown transistor turns on
and discharges the output capacitor. MAS9161B
does not feature an auto-discharge function.
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) or WL-CSP Package
•
Several Output Voltage Options Available,
see Ordering Information p. 15
APPLICATIONS
•
Continuously Working Low Power Circuits
•
Bluetooth Modules
•
Digital Circuits
•
Real-Time Clocks (RTC)
•
SRAMs
•
CMOS Backup Power
•
Cellular Phones
•
Portable Systems
•
Smoke Detectors
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DA9161.010
28 January 2004
PIN CONFIGURATION
TSOT-5
Top view
VOUT
5
61AX
1
2
3
4
N/C
VIN GND CTRL
For top marking information see
ordering information p. 15
WL-CSP
A1
A3
B2
C3
C3
C1
BOTTOM VIEW
A3
A1
Pin A1 Designator
TOP VIEW
B2
For top marking information see
ordering information p. 15
PIN DESCRIPTION
Pin Name
Pin Number
in TSOT-5
1
2
3
4
5
Pin Number in WL-CSP
Pin Order 11
Pin Order 12
Note 1
Note 2
Type
Function
VIN
GND
CTRL
N/C
VOUT
C3
B2
A1
A3
C1
C3
A1
A3
B2
C1
P
G
I
-
O
Power Supply Voltage
Ground
Enable/Disable Pin for Regulator
Not Connected
Output
G = Ground, I = Input, O = Output, P = Power
Note 1:
WL-CSP Pin Order 11 is pin compatible with LP3985.
Note 2:
WL-CSP Pin Order 12 is pin compatible with LP2985.
61XY
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C1
DA9161.010
28 January 2004
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
1.5
Unit
V
If CTRL-pin is not connected, MAS9161 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
◆
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
= 50 mA
I
OUT
= 1 mA
I
OUT
= 10 mA
I
OUT
= 50 mA
I
OUT
= 80 mA
Min
V
OUT(NOM)
– 0.06
V
OUT(NOM)
– 0.08
Typ
Max
V
OUT(NOM)
+ 0.06
V
OUT(NOM)
+ 0.06
Unit
V
5
50
150
200
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
= 80 mA
MAS9161A,
T
A
= + 27°C
V
CTRL
= 0 V,
T
A
= + 85°C
V
OUT
= 0 V
T
A
= + 27°C,
MAS9161B,
V
OUT
= 0 V
V
CTRL
= 0 V
T
A
= + 27°C
V
OUT
= 2.7 V
T
A
= + 85°C,
V
OUT
= 0 V
T
A
= + 85°C
V
OUT
= 2.7 V
Min
0
Typ
Max
80
300
Unit
mA
mA
mA
µA
120
10
10.5
16
61
0.01
0.2
0.3
4.3
0.4
4.4
Ground Pin Current, Sleep
Mode
I
GND
0.5
4
µA
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DA9161.010
28 January 2004
◆
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)
Symbol
R
JA
Conditions
thermal test board according
to JESD51-7 (4 layers),
TSOT-5 package
mounted on MAS9161 CSP
evaluation board,
WL-CSP package
any ambient temperature
Min
Typ
207
210
Max
Unit
°C/W
Maximum Power Dissipation
P
d
P
d MAX
=
Note 1
T
J (MAX)
−
T
A
R
JA
W
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.
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.
◆
Line and Load Regulation
Parameter
Line Regulation
Load Regulation
◆
Noise and Ripple Rejection
Symbol
Conditions
V
OUT(NOM)
+ 1 V < V
IN
< 5.3 V,
I
OUT
= 10 mA
I
OUT
= 1 mA to 80 mA
Min
Typ
1.0
12
Max
3
24
Unit
mV
mV
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
= 10 mA
f = 1 kHz
f = 10 kHz
f = 100 kHz
Min
Typ
70
300
50
30
30
Max
Unit
µVrms
nV
Hz
dB
dB
50
30
30
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