TS9002
300mA CMOS LDO with Enable & Power Good
Pin assignment
1. Input
2. Ground
3. Enable
4. Power Good
5. Output
Low Drop Out Voltage 0.4V
Enable Shutdown
Power Good
General Description
The TS9002 series is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent
current (30uA typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications.
The Chip Enable (CE) includes a CMOS or TTL compatible input allows the output to be turned off to prolong battery life.
The TS9002 series is included a precision voltage reference, error correction circuit, a current limited output driver, over
temperature shutdown, and a “Power Good” detector, which pulls low when the output is out of regulation.
This series are offered in 5-pin SOT-25 package.
Features
Dropout voltage typically 0.4V@Io=300mA (Vo>2.5V)
Low power consumption
Output voltage +/-2%, +/-3% (1.2V)
Internal current limit and thermal shutdown
Short circuit current fold-back
Power saving shutdown mode
Power good output function
Ordering Information
Part No.
Operating Temp.
(Ambient)
Package
Applications
Palmtops
Video recorders
Battery powered equipment
PC peripherals
High-efficiency linear power supplies
Digital signal camera
TS9002
x
CX5
-40 ~ +85
o
C
SOT-25
Note: Where
x
denotes voltage option, available are
1=1.2V
A=1.5V
K=2.5V,
S=3.3V,
Contact factory for additional voltage options.
Typical Application Circuit
Block Diagram
TS9002 series
1-1
2004/09 rev. B
Absolute Maximum Rating
Input Supply Voltage
Enable Input Voltage
Output Current
Power Dissipation
Thermal Resistance
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260
o
C)
Vin
Vce
Io
P
D
Өja
Tj
T
STG
+7
Gnd-0.3 ~ Vin+0.3
Pd / (Vin – Vout)
380
260
-40 ~ +125
-65 ~ +150
10
mW
o
V
V
C/W
o
o
C
C
S
Caution:
Stress above the listed absolute rating may cause permanent damage to the device
.
Electrical Characteristics
(Ta = 25
o
C, Io=0.1mA, Cout=2.2uF, Vce≥2V; Vin >2.7V & Io<150mA for 1.2V output type, unless otherwise specified.)
Parameter
Output Voltage
Conditions
Vin=Vo + 1V
Vin=2.7V
Vout > 1.5V
Vout <1.5V
Min
0.985|Vo|
0.970|Vo|
--
Typ
Max
1.015|Vo|
1.030|Vo|
Unit
V
Vout Temperature Coefficient
Maximum Output Current
Vin=Vo + 1V
Vin=2.7V
Line Regulation
Load Regulation
Load Regulation (1.2V output)
Dropout Voltage
Vout > 1.5V
Vout <1.5V
30
--
--
--
0.2
1
300
800
1
30
50
450
350
50
20
30
--
--
--
0.3
1.0
4.0
400
1300
2
50
80
--
--
--
--
--
ppm/
o
C
mA
300
150
--
--
--
--
--
--
--
--
--
--
--
--
--
Vo+1V
≤
Vin
≤
Vo+2V
Vin=Vo+1V, 1mA≤I
L
≤300mA
Vin=2.7V, 1mA≤I
L
≤150mA
Io=300mA,
Vout=Vo - 2%
Vout
≥
2.0V
Vout<2.0V
%
%
mV
Quiescent Current
Quiescent Current
Vin≤0.4V (shutdown)
Vout
≥
0.4V,
Io=0mA
Vout > 1.5V
Vout <1.5V
Vout > 1.5V
Vout <1.5V
uA
uA
Output Current Limit
Vout=0V
mA
Power Supply Rejection Ratio
Io=100mA,
At f=1kHz,
At f=10kHz,
dB
Output Noise
Enable Input
Enable Input Logic-Low Voltage
Enable Input Logic-High Voltage
Enable Input Current
Io=10mA, f=10Hz to 100kHz,
uVrms
Regulation shutdown
Regulation enable
V
IL
≤0.4V
V
IL
≥
2.0V
--
2.0
--
--
--
--
--
--
0.4
--
0.5
0.1
V
V
uA
TS9002 series
2-2
2004/09 rev. B
Electrical Characteristics
(continued)
Power Good
Output under voltage
1.5V
≤
Vo
(NOM)
Vo
(NOM)
< 1.5V
Output over voltage
2.5V
≤
Vo
(NOM)
≤
5.0V
1.2V
≤
Vo
(NOM)
≤
2.5V
PG leakage current
PG voltage rating
PG voltage low
V
PG
= 7V
Vo in regulation
Isink = 0.4mA
Isink = 0.1mA
Vo >1.5V
Vo < 1.5V
--
--
115
125
--
--
--
--
--
--
--
--
--
--
--
--
85
75
--
--
1
7
0.4
0.1
%
Vo
(NOM)
%
Vo
(NOM)
uA
V
V
Detail Description
Description
The TS9002 series of CMOS regulators contain a P-MOS pass transistor, voltage reference, error amplifier, over
current protection, thermal shutdown and power good function.
The TS9002 series switches from voltage mode to current mode when the load exceeds the rated output current. This
prevents over stress. The TS9002 also incorporates current fold-back to reduce power dissipation when the output is
short circuit. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%.
Full current is restored when the voltage exceeds 0.8V.
The internal P-channel pass transistor receives data from the error amplifier, over current shutdown, short output
protection and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to
a precision reference. Over current and thermal shutdown circuits become active when the junction temperature
exceeds 150
o
C, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120
o
C.
Enable
The Chip Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all
internal circuits are powered down. In this state, the quiescent current is less than 1uA. This pin behaves much like an
electronic switch.
External Capacitor
The TS9002series is stable with an output capacitor to ground of 2.2uF or greater. It can keep stable even with higher
or poor ESR capacitors.
A second capacitor is recommended between the input and ground to stabilize Vin. The input capacitor should be
larger than 0.1uF to have a beneficial effect.
All capacitors should be placed in close proximity to the pins. A “quiet” ground termination is desirable.
Power Good
The TS9002 includes the Power Good feature. When the output is not within = +/-15% of the specified voltage, it pulls
low. This can occur on other condition – input voltage too low, during over-temperature, during over-current and
output is pulled up.
TS9002 series
3-3
2004/09 rev. B
Typical Electrical Characteristics
TS9002 series
4-4
2004/09 rev. B
SOT-25 Mechanical Drawing
DIM
A
B
C
D
E
F
H
L
SOT-25 DIMENSION
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
2.70
3.00
0.106
0.118
0.25
0.50
0.010
0.020
1.90(typ)
0.075(typ)
0.95(typ)
0.037(typ)
1.50
1.70
0.059
0.067
1.05
1.35
0.041
0.053
2.60
3.00
0.102
0.118
0.60(typ)
0.024(typ)
TS9002 series
5-5
2004/09 rev. B
嵌入式系统
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