TS9009
80mA CMOS Low Dropout Voltage Regulator with Enable
Pin assignment
1. Input
2. Ground
3. Enable
4. N/C
5. Output
Low Power Consumption
Low Drop Out Voltage 0.4V
Enable Shutdown
General Description
The TS9009 series is combine high accuracy with very low power consumption (225uA at 20mA output), and very low
dropout voltage (from typically 20mV at light loads to 300mV at 80mA).
The TS9009 series is designed for optimal performance with low-value, low cost ceramic capacitors. In most applications
only 0.47uF of output capacitance is required for stability, and specifically for battery power devices. The Chip Enable
(CE) includes a CMOS or TTL compatible input allows the output to be turned off to prolong battery life. When it is
shutdown, power consumption drops practically to zero. If Chip Enable control is not required, the Enable pin can be tied
to the input for 3-terminal operation. The TS9009 series is included a precision voltage reference, current limiting, over
temperature shutdown, and protection against reversed battery connection.
This series are offered in 5-pin SOT-25 package.
Features
Output current up to 80mA
Low power consumption
Output voltage +/-2%
Internal current and thermal limiting
Reversed input polarity protection
Zero Off-mode current
Logic controlled shutdown
Ordering Information
Part No.
TS9009
x
CX5
Operating Temp.
(Ambient)
-40 ~ +85 C
o
Package
SOT-25
Applications
Notebook, Palmtops and PDA
Bar code scanners
Battery powered equipment
High efficiency linear power supplies
DC to DC modules
Note: Where
x
denotes voltage option, available are
N=2.8V,
P=3.0V,
S=3.3V,
5=5.0V.
Contact factory for additional voltage options.
Typical Application Circuit
Block Diagram
TS9009 series
1-5
2003/12 rev. B
Absolute Maximum Rating
(Note 1)
Input Supply Voltage
Enable Input Voltage
Output Current
Power Dissipation (Note 3)
Thermal Resistance
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260
o
C)
Vin
Vce
Io
P
D
Өja
Tj
T
STG
+20
+20
80
380
260
-40 ~ +125
-65 ~ +150
5
V
V
mA
mW
o
C/W
o
o
C
C
S
Recommend Operating Rating
Input Supply Voltage
Enable Input Voltage
Vin
Vce
+16
Gnd-0.3 ~ Vin+0.3
V
V
Electrical Characteristics
Ta = 25
o
C, Io=1mA, Cout=0.47uF, Vce
≥
2V, unless otherwise specified.
Parameter
Output Voltage
Conditions
Vin=Vo + 1V
1mA≤I
L
≤80mA
Min
0.98|Vo|
0.97|Vo|
--
Typ
Max
1.02|Vo|
1.03|Vo|
Unit
V
V
ppm/ C
o
Output Voltage Temperature
Coefficient (Note 4)
Line Regulation
Load Regulation (Note 5)
Dropout Voltage (Note 6)
Vo+1V
≤
Vin
≤
16V
Vin=Vo+1V, 1mA≤I
L
≤80mA
Vce
≥
2V
Io=100uA
Io=20mA
Io=50mA
Io=80mA
Quiescent Current
Ground Pin Current (Note 7)
Vin≤0.4V (shutdown)
Vce
≥
2V
Io=0.1mA
Io=20mA
Io=50mA
Io=80mA
Output Current Limit
Power Supply Rejection Ratio
Thermal Regulation (Note 8)
Enable Input
Enable Input Logic-Low Voltage
Enable Input Logic-High Voltage
Enable Input Current
Regulation shutdown
Regulation enable
V
IL
≤0.6V
V
IL
≥
2.0V
Vout=0V
At f=100Hz, Io=0.1mA,
50
--
--
0.08
0.2
0.3
0.5
--
--
--
--
1
--
750
--
3000
--
--
--
%/V
%/V
--
--
--
--
--
--
--
--
--
--
--
--
20
200
250
300
0.01
180
225
850
1800
180
70
0.05
mV
uA
uA
mA
dB
%/W
--
2.0
--
--
--
--
0.01
15
0.6
--
1
50
V
V
uA
TS9009 series
2-5
2003/12 rev. B
Electrical Characteristics
Note 1: Exceeding the absolute maximum rating may damage the device.
Note 2: The device is not guaranteed to function outside its operating rating.
Note 3: The maximum allowable power dissipation at any Ta is Pd(max) = [ Tj(max) - Ta] *
Өja.
Exceeding the
maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
thermal shutdown.
Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total
temperature range.
Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for
load regulation in the load range from 1mA to 80mA. Changes in output voltage due to heating effects are
covered by the thermal regulation specification.
Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Note 7: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn
from the supply is the sum of the load current plus the ground pin current.
Note 8: Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is
applied, excluding load or line regulation effects. Specifications are for a 80mA load pulse at Vin=16V for
t=10mS.
Applications Information
Input Capacitor
Place an 0.1uF capacitor from Vin to Gnd in applications where there is more than 10 inches of wire between the input
and the AC filter capacitor, or where a battery is used as the input.
Output Capacitor
As with any PNP-based regulator, the TS9009 requires an output capacitor to prevent oscillation. However, the TS9009
is extremely stable, and requires only 0.47uF of output capacitance for stability. It can be used with any type of
capacitor, but it works great with cheap, tiny ceramic capacitors, it also can be increased the output capacitor value
without limit to improve transient response.
Caveat
: used a capacitor with a resonant frequency above 500KHz. Ceramic capacitors work great, but some
dielectrics have poor temperature coefficients, which affect the capacitance value over temperature. Tantalum
capacitors are very stable over temperature, but are larger and much more expensive. Aluminum electrolytic capacitors
also work, but they have electrolytes which freeze at –30
o
C. So, used tantalum or ceramic capacitors for operation
o
below -25 C.
No Load Stability
Unlike most regulators, the TS9009 will remain stable and in regulation with no load other than the internal voltage
divider. The makes TS9009 ideal for CMOS RAM keep alive applications.
Enable Input
The Ts9009 have practically zero off-mode current. When the chip enable input (CE) is held below 0.6V, the TS9009 is
powered off. Pulling CE high over 2V will be turned on the regulation. When the CE is held low, the regulator typically
draws only 15nA of current. While the logic threshold is TTL/CMOS compatible, CE may be pulled as high as 20V,
independent to Vin.
TS9009 series
3-5
2003/12 rev. B
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